Researchers Database

Ohsedo Yutaka

    Faculty Division of Engineering Research Group of Engineering Associate Professor
Last Updated :2021/07/07

researchmap

Degree

  • Ph. D. (Engineering), Osaka University, Mar. 2000

Research Interests

  • Functional Fiber Organic functional materials Polymer materials Gels 

Research Areas

  • Nanotechnology/Materials, Organic functional materials
  • Nanotechnology/Materials, Polymer materials

Research Experience

  • Apr. 2020, Nara Women's University, Faculty of Human Life and Environment, Department of Computer Science and Clothing Environment, Associate Professor, Japan
  • Apr. 2018 Mar. - 2020, Ashikaga University, Center for liberal arts and sciences, Assistant Professor, Japan
  • Apr. 2017 Mar. - 2018, Fukuoka Institute of Technology, Lecturer (Part-time) in Graduate School, Japan
  • Apr. 2017 Mar. - 2018, Fukuoka Institute of Technology, Research Fellow, Japan
  • Sep. 2016 Mar. - 2018, Fukuoka Institute of Technology, Lecturer (Part-time), Japan
  • Sep. 2015 Mar. - 2017, Kyushu University, Art, Science and Technology Center for Cooperative Research, Research Fellow
  • Apr. 2015 Mar. - 2017, Fukuoka Institute of Technology, Comprehensive Research Organization, Visiting Research Fellow, Japan
  • Sep. 2015 Mar. - 2016, Fukuoka Institute of Technology, Lecturer (Part-time), Japan
  • Jul. 2015 Aug. - 2015, Fukuoka Institute of Technology, Research Fellow
  • Apr. 2011 Mar. - 2015, Kyushu University, Art, Science and Technology Center for Cooperative Research, Research Associate Professor
  • May 2010 Mar. - 2011, Kyushu University, Art, Science and Technology Center for Cooperative Research, Research Fellow
  • Sep. 2009 May - 2010, KH Neochem Co., Ltd. (formerly known as Kyowa Hakko Chamical Co., Ltd.), R&D Division, Head Office, Assistant Manager
  • Apr. 2007 Sep. - 2009, KH Neochem Co., Ltd. (formerly known as Kyowa Hakko Chamical Co., Ltd.), Yokkaichi Research Laboratories, Leader
  • Aug. 2003 Mar. - 2007, KH Neochem Co., Ltd. (formerly known as Kyowa Hakko Chamical Co., Ltd.), Yokkaichi Research Laboratories, Researcher
  • Nov. 2001 Jul. - 2003, Hokkaido University, Graduate School of Science, Research Associate, Japan
  • Apr. 2000 Oct. - 2001, Osaka University, Graduate School of Engineering, Research Associate, Japan

Education

  • Apr. 1997, Mar. - 2000, Osaka University, Graduate School of Engineering, Department of Materials Chemistry, Doctor's Course
  • Apr. 1995, Mar. - 1997, Osaka University, Graduate School of Engineering, Department of Materials Chemistry, Master's Course
  • Apr. 1993, Mar. - 1995, Osaka University, Faulty of Engineering, Department of Applied Chemistry
  • Apr. 1988, Mar. - 1993, Kobe City College of Technology, Department of Applied Chemistry

Committee Memberships

  • Apr. 2014West Japan Nanosheet SocietyOrganizing Committee

Published Papers

  • Structure-regulated tough elastomers of liquid crystalline inorganic nanosheet/polyurethane nanocomposites

    Toki Morooka; Yutaka Ohsedo; Riki Kato; Nobuyoshi Miyamoto

    Liquid crystalline nanosheet/polyurethane composite elastomers with superior mechanical properties were successfully synthesized using the newly developed in situ polymerization technique.

    , Royal Society of Chemistry (RSC), Jan. 2021, Materials Advances, 2 (3), 1035 - 1042, doi;url

    Scientific journal

  • Liquid Crystalline Colloidal Mixture of Nanosheets and Rods with Dynamically Variable Length

    Riki Kato; Akira Kakugo; Kazuhiro Shikinaka; Yutaka Ohsedo; Arif Md; Rashedul Kabir; Nobuyoshi Miyamoto

    Nov. 2018, ACS Omega, 3 (11), 14869 - 14874, doi;url

    Scientific journal

  • Anisotropic Self-Oscillating Reaction in Liquid Crystalline Nanosheet Hydrogels

    Morio Shintate; Takumi Inadomi; Shinya Yamamoto; Yusuke Kuboyama; Yutaka Ohsedo; Takashi Arimura; Tomoka Nakazumi; Yusuke Hara; Nobuyoshi Miyamoto

    Anisotropic chemical wave propagation of self-oscillating Belousov-Zhabotinsky (BZ) reaction was demonstrated in the poly(N-isopropylacrylamide) gel films embedded with macroscopically aligned liquid crystalline inorganic nanosheets. Although the average propagation rate of chemical wave v was 3.56 mm min-1 in the gels without nanosheets, the propagation was retarded in the gels with 1 wt % of nanosheets: v = 1.89 mm min-1 and v = 1.33 mm min-1 along the direction parallel and perpendicular to the nanosheet planes, respectively. Thus, the wave propagation is anisotropic with the anisotropy ratio v-/v = 1.42 in these gels and the periodic patterns formed by the BZ reaction were concentric ellipses, different from circles seen in isotropic gels. Furthermore, the propagation rate and degree of anisotropy were controllable by nanosheet concentration. These phenomena can be explained that the diffusion of molecules inside the gel is effectively hindered along the direction perpendicular to the nanosheet planes due to the very large aspect ratio of the aligned nanosheets. The present systems will be applicable for anisotropic self-oscillating soft actuators with one-dimensional motions as well as for ideal model system of BZ reactions., American Chemical Society, Mar. 2018, JOURNAL OF PHYSICAL CHEMISTRY B, 122 (11), 2957 - 2961, doi;web_of_science

    Scientific journal

  • New composite thixotropic hydrogel composed of a polymer hydrogelator and a nanosheet

    Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe; Nobuyoshi Miyamoto

    A composite gel composed of a water-soluble aromatic polyamide hydrogelator and the nanosheet Laponite (R), a synthetic layered silicate, was produced and found to exhibit thixotropic behaviour. Whereas the composite gel contains the gelator at the same concentration as the molecular gel made by the gelator only, the composite gel becomes a softer thixotropic gel compared to the molecular gel made by the gelator only. The reason for this could be that bundles of polymer gelator may be loosened and the density of the polymer network increased in the presence of Laponite., ROYAL SOC, Nov. 2017, ROYAL SOCIETY OPEN SCIENCE, 4 (12), 171117, doi;web_of_science;url;url

    Scientific journal

  • Synthesis of an electronically conductive hydrogel from a hydrogelator and a conducting polymer

    Yutaka Ohsedo; Kowichiro Saruhashi; Hisayuki Watanabe; Nobuyoshi Mlyamoto

    The present study demonstrates that the synthetic output of a polymer hydrogelator and a water-soluble electronically conductive polymer exhibits thixotropy due to the hydrogelator although each component at low concentrations does not exhibit this behaviour. The composite hydrogel exhibits semiconducting electronic conductivity and is insoluble in aqueous electrolyte solutions. These properties constitute significant advantages for applications in polymer electrodes., ROYAL SOC CHEMISTRY, Sep. 2017, NEW JOURNAL OF CHEMISTRY, 41 (18), 9602 - 9606, doi;web_of_science;url;url

    Scientific journal

  • Thixotropic stiff hydrogels from a new class of oleoyl-D-glucamine-based low-molecular-weight gelators

    Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe; Nobuyoshi Miyamoto

    A series of new compounds comprising oleoyl, amino acid and D-glucamine moieties were synthesised using mild reaction conditions, and their hydrogelation ability was evaluated. The gels exhibited improved stiffness and thixotropic properties dependent on the chemical structure of the amino acid linker and the number of potential hydrogen bonding sites., ROYAL SOC CHEMISTRY, 2017, RSC ADVANCES, 7 (66), 41686 - 41692, doi;web_of_science;url;url

    Scientific journal

  • Cultivation of Cellulose-Producing Bacteria in the Nanosheet Liquid Crystal of Na-fluorohectorite

    Shinya Yamamoto; Yutaka Ohsedo; Erii Yamada; Kohta Sonoda; Hajime Mita; Nobuyoshi Miyamoto

    Dec. 2015, Clay Science, 19 (3), 73 - 77, doi;url;url

    Scientific journal

  • A new family of light-emissive symmetric squarylium dyes in the solid state

    Yutaka Ohsedo; Kowichiro Saruhashi; Hisayuki Watanabe

    High-intensity light emission was observed from symmetric squarylium dyes bearing diaryl amine moieties in the solid state unlike typical squarylium analogues. The enhanced light emission in the solid state may be ascribed to the propeller-like dye architectures, which sterically hinder the intermolecular pi-pi interactions rather than the intramolecular charge transfer. (C) 2015 Elsevier Ltd. All rights reserved., ELSEVIER SCI LTD, Nov. 2015, Dyes and Pigments, 122, 134 - 138, doi;web_of_science;url;url

    Scientific journal

  • Improved mechanical properties of polyacrylamide hydrogels created in the presence of low-molecular-weight hydrogelators

    Yutaka Ohsedo; Makiko Taniguchi; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe

    Polyacrylamide hydrogels were prepared using molecular hydrogels composed of a low-molecular-weight gelator system, octylaldonamide/sodium dodecyl sulfate as templates by photo-polymerization, and the effect of the template on the polymer hydrogel network was examined on the basis of the polymer hydrogels' performance in compression tests. It was found that the crushing stress of the obtained polymer hydrogels was enhanced by using the molecular gel templates., ROYAL SOC CHEMISTRY, Oct. 2015, RSC Advances, 5 (109), 90010 - 90013, doi;web_of_science;url;url

    Scientific journal

  • A new water-soluble aromatic polyamide hydrogelator with thixotropic properties

    Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe

    The water-soluble aromatic polyamide poly(3-sodium sulfo-p-phenylene terephthalamide) forms a hydrogel with anisotropy, which exhibits good thixotropic behaviour, even at the critical gel concentration of the gelator (1.0 wt%)., ROYAL SOC CHEMISTRY, Sep. 2015, RSC Advances, 5 (101), 82772 - 82776, doi;web_of_science;url;url

    Scientific journal

  • Long-chain alkylamide-derived oil gels: Mixing induced onset of thixotropy and application in sustained drug release

    Yutaka Ohsedo; Makiko Taniguchi; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe

    We showed that the gelation ability of commercially available long-chain alkylamides, behenamide (BAm) and erucamide (EAm) in various solvents for the first time. Furthermore, oil gels derived from mixtures of BAm and EAm exhibited thixotropic properties although the same property was absent in the oil gels prepared separately using each alkylamide. The thixotropic behaviour of a two-component mixed gel was evaluated using a rheometer quantitatively. We also found that the obtained two-component oil gel can be formulated for use as a vehicle for sustained drug release. The drug, antipyrine, in BAm/EAm (1/1, w/w) olive oil gel formulation was gradually released into water following Fickian diffusion kinetics., ROYAL SOC CHEMISTRY, Jun. 2015, New Journal of Chemistry, 39 (8), 6482 - 6490, doi;doi;web_of_science;url;url

    Scientific journal

  • Onset of mixing-induced thixotropy in hydrogels by mixing two homologues of low-molecular-weight hydrogelators

    Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe

    We determined the onset of thixotropy in hydrogels when two homologues of low-molecular-weight hydrogelators, N-alkyl-D-glucamides, were mixed. Intriguingly, the hydrogels generated from the individual components did not show such behaviour. The mixing induced onset of thixotropy might be attributed to the improved network quality., ROYAL SOC CHEMISTRY, Sep. 2014, RSC Advances, 4 (82), 43560 - 43563, doi;web_of_science;url;url

    Scientific journal

  • Creation of thixotropic multicomponent alkylamide organogels containing non-volatile oil as potential drug release host materials

    Yutaka Ohsedo; Makiko Taniguchi; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe

    Multicomponent alkylamide organogels containing non-volatile oils were generated as potential thixotropic host materials for medicinal applications such as ointments. In the presence of these non-volatile oils, a three-component alkyl amide system exhibited mixed induced thixotropy. This thixotropic organogel showed drug release abilities following diffusion kinetics and may be suitable drug release host materials., ROYAL SOC CHEMISTRY, Aug. 2014, RSC Advances, 4 (67), 35484 - 35488, doi;web_of_science;url;url

    Scientific journal

  • Synthesis and electrochemical properties of symmetric squarylium dyes containing diarylamine

    Yutaka Ohsedo; Misao Miyamoto; Akihiro Tanaka; Hisayuki Watanabe

    We studied the synthesis and electrochemical properties of symmetric squarylium dyes (SQDs) containing diarylamine with various structures. It was shown that several of our synthesized SQDs had improved electrochemical properties and might be a promising and an easy modifiable pi-conjugate core block of active materials for electroactive and photoactive devices. (C) 2013 Elsevier Ltd. All rights reserved., ELSEVIER SCI LTD, Feb. 2014, DYES AND PIGMENTS, 101, 261 - 269, doi;web_of_science;url;url

    Scientific journal

  • N-Alkylamido-D-glucamine-based gelators for the generation of thixotropic gels

    Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe

    Hydrogels made from new gelators, composed of the alkyl chain and a D-glucamine moiety linked together with glycine(s), exhibit thixotropic properties, whereas the hydrogels formed with structurally similar N-alkyl-D-glucamide, which do not contain the glycine moiety, have a tendency to crystallize and do not show thixotropic behaviour., ROYAL SOC CHEMISTRY, 2014, RSC ADVANCES, 4 (89), 48554 - 48558, doi;web_of_science;url;url

    Scientific journal

  • A new composite thixotropic hydrogel composed of a low-molecular-weight hydrogelator and a nanosheet

    Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe; Nobuyoshi Miyamoto

    A two-component composite comprised of a low-molecular-weight hydrogelator and the nanosheet Laponite (R), a synthetic layered silicate, showed thixotropic behaviour, whereas each single component did not show thixotropic behaviour at the same concentration. This mixing enhancement effect may be attributed to the improved quality of the gel network., ROYAL SOC CHEMISTRY, 2014, RSC ADVANCES, 4 (84), 44837 - 44840, doi;web_of_science;url;url

    Scientific journal

  • Synthesis of a new squarylium alkylamide family and its organogelation ability

    Yutaka Ohsedo; Misao Miyamoto; Akihiro Tanaka; Hisayuki Watanabe

    A new family of squarylium monoalkylamides and dialkylamides was synthesised and its organogelation ability was evaluated. We found that both squarylium monoalkylamides and dialkylamides formed organogels in DMF. We also found that ion-selective organogel formation was observed in DMF solutions containing metal ions, and gel electrolytes consisting of squarylium alkylamides, DMF and LiClO4 showed good ionic conductivities comparable to that of the corresponding liquid electrolytes., ROYAL SOC CHEMISTRY, Jul. 2013, New Journal of Chemistry, 37 (9), 2874 - 2880, doi;web_of_science;url;url

    Scientific journal

  • Mixing induced thixotropy of a two-component system of alkylurea organogelators having different alkyl chains

    Yutaka Ohsedo; Masashi Oono; Akihiro Tanaka; Hisayuki Watanabe

    Mixing induced thixotropy was demonstrated on a two-component system of alkylurea with different alkyl chains known as low-molecular-weight organogelators. Individually, the component gels did not show thixotropic behavior. The improved network structure obtained by mixing might enable enhanced toughness and stimulus-responsiveness of mixed gels., ROYAL SOC CHEMISTRY, May 2013, New Journal of Chemistry, 37 (8), 2250 - 2253, doi;web_of_science;url;url

    Scientific journal

  • Mixing enhancement effect of low-molecular-weight organogelators for thixotropic organogel creation

    Yutaka Ohsedo; Hisayuki Watanabe; Masashi Oono; Akihiro Tanaka

    In this study, we found that organogels composed of mixed alkylhydrazide derivatives with different alkyl chains as low-molecular-weight organogelators showed thixotropic properties, whereas organogels composed of a single alkylhydrazide component did not show such properties. With a two- or three-component system of alkylhydrazides, the transparency and mechanical properties of the resulting organogels were enhanced. This mixing enhancement for organogelators might be due to an improved network of closer and finer fibers compared to that in a one-component system., CHEMICAL SOC JAPAN, Mar. 2013, Chemistry Letters, 42 (4), 363 - 365, doi;web_of_science;url;url

    Scientific journal

  • Alkylhydrazide derivatives as new organogelators and their potential ability to gel electrolytes

    Yutaka Ohsedo; Misao Miyamoto; Hisayuki Watanabe; Masashi Oono; Akihiro Tanaka

    We found that alkylhydrazides, which are commercially available reagents, formed organogels in various organic solvents having dielectric constants ranging from 2 to 66. We also found that gel electrolytes consisting of alkylhydrazide, PC, and LiClO4 showed good ionic conductivities, which were comparable to those of the corresponding liquid electrolytes., CHEMICAL SOC JAPAN, Mar. 2013, Bulletin of the Chemical Society of Japan, 86 (5), 671 - 673, doi;web_of_science;url;url

    Scientific journal

  • Improved mechanical properties of alkylamide organogels via a mixing enhancement effect

    Yutaka Ohsedo; Hisayuki Watanabe; Masashi Oono; Akihiro Tanaka

    Mixtures of alkylamide derivatives with different alkyl chains were found to form organogels which exhibit thixotropic properties, while single alkylamide components formed organogels which did not exhibit such properties. With a three-component alkylamide system, the transparency and mechanical properties (toughness and stimulus-responsiveness) of the resulting organogels were enhanced. This mixing enhancement for organogelators may be due to the improved network density compared with that of the one-component systems. © 2013 The Royal Society of Chemistry., Feb. 2013, RSC Advances, 3 (17), 5803 - 5806, doi;url;url

    Scientific journal

  • Hydrogel formed by a simple squaric acid derivative

    Yutaka Ohsedo; Misao Miyamoto; Masashi Oono; Kazuaki Shikii; Akihiro Tanaka

    A new and simple low-molecular-weight gelator containing squaric acid moiety (PhSQ) forms a hydrogel or crystal in aqueous solution depending on the PhSQ concentration. The hydrogelation ability of PhSQ can be enhanced by adding an acid reagent. The hydrogel might consist of bundles of PhSQ whose hydrophilic porous cavities contain water. © 2013 The Royal Society of Chemistry., Royal Society of Chemistry, Jan. 2013, RSC Advances, 3 (12), 3844 - 3847, doi;url;url

    Scientific journal

  • Hole-transporting and emitting pendant polymers for organic electroluminescent devices

    Hiroshi Kageyama; Daisuke Mutaguchi; Keisuke Hashimoto; Daisuke Nagamatsu; Masatake Tanaka; Kenji Okumoto; Yutaka Ohsedo; Yasuhiko Shirota

    New hole-transporting pendant polymers with high glass-transition temperatures (Tgs) above 200 degrees C were designed and synthesized. Multilayer organic electroluminescent (EL) devices using the new polymers as the hole-transport layer and quinacridone-doped tn's(8-quinolinolato)aluminum as the emitting layer exhibited high performance. One of the hole-transporting polymers functioned well as a hole injection buffer layer in organic EL devices. New green- and orange-emitting pendant polymers with high Tgs and desired ambipolar character were also designed and synthesized. Organic EL devices using these emitting polymers also exhibited good performance. One of the hole-transporting polymer showed a high hole carrier mobility of over 10(-3) cm(2)V(-1) s(-1) at an electric field of 1.0 x 10(5) Vcm(-1), as determined by a time-of-flight method., SPIE-INT SOC OPTICAL ENGINEERING, Dec. 2006, Proceedings of SPIE - The International Society for Optical Engineering, 6333, 63330G, doi;web_of_science;url;url

    Scientific journal

  • Synthesis, properties, and applications of photochromic amorphous molecular materials and electrochromic polymers

    Y Shirota; H Nakano; Imae, I; Y Ohsedo; Y Yasuda; H Utsurni; T Ujike; T Takahashi

    The synthesis, properties, and applications of photochromic amorphous molecular materials and novel organic electrochromic materials including molecular gels and polymers containing pendant oligothiophenes are described., AMER CHEMICAL SOC, 2005, CHROMOGENIC PHENOMENA IN POLYMERS, 888, 173 - 186, web_of_science

    Scientific journal

  • Surface friction of hydrogels with well-defined polyelectrolyte brushes

    Yutaka Ohsedo; Rikiya Takashina; Jian Ping Gong; Yoshihito Osada

    Hydrogels of poly(2-hydroxyethyl methacrylate) (PHEMA) with well-defined polyelectrolyte brushes of poly(sodium 4-styrenesulfonate) (PNaSS) of various molecular weights were synthesized, keeping the distance between the polymer brushes constant at ca. 20 nm. The effect of polyelectrolyte brush length on the sliding friction against a glass plate, an electrorepulsive solid substrate, was investigated in water in a velocity range of 7.5 x 10(-5) to 7.5 x 10(-2) m/s. It is found that the presence of polymer brush can dramatically reduce the friction when the polymer brushes are short. With an increase in the length of the polymer brush, this drag reduction effect only works at a low sliding velocity, and the gel with long polymer brushes even shows a higher friction than that of a normal network gel at a high sliding velocity. The strong polymer length and sliding velocity dependence indicate a dynamic mechanism of the polymer brush effect., AMER CHEMICAL SOC, Jul. 2004, Langmuir, 20 (16), 6549 - 6555, doi;web_of_science;url;url

    Scientific journal

  • Shear-induced mesophase organization of polyanionic rigid rods in aqueous solution

    Takafumi Funaki; Tatsuo Kaneko; Kanji Yamaoka; Yutaka Ohsedo; Jian Ping Gong; Yoshihito Osada; Mitsuru Ueda; Yuzo Shibasaki

    AMER CHEMICAL SOC, Jun. 2004, Langmuir, 20 (15), 6518 - 6520, doi;web_of_science;url;url

    Scientific journal

  • Study on Doping Behaviors of Vinyl Hydrogels with Pendant Terthiophenes

    Li Chen; Jian Ping Gong; Yutaka Ohsedo; Yoshihito Osada

    The water-swollen poly(AA3T-co-NaSS) and poly(AA3T-co-PEG) gels were synthesized by radical copolymerization of the monomer, [(2,2:5',2"-terthiophen-5-yl)methyl acrylate] (AA3T), containing pendant terthiophenes as an electron-conducting material with a soluble monomer, sodium p-styrenesulfonate (NaSS), or oligo(ethylene glycol) (PEG); their swelling, spectral, and doping behaviors were investigated. The degree of swelling of the poly(AA3T-co-PEG) gel was independent of the pH, whereas that of poly(AA3T-co-NaSS) gel increases abruptly below pH 3, which suggests self-doping between the AA3T and NaSS groups. The self-doping is not suppressed by cross-linking. Both poly(AA3T-co-NaSS) and poly(AA3T-co-PEG) gels can be chemically doped with concentrated HCl or HClO4 solution., WILEY-V C H VERLAG GMBH, Nov. 2003, Macromolecular Chemistry and Physics, 204 (17), 2142 - 2146, doi;web_of_science;url;url

    Scientific journal

  • Synthesis and electrochromic properties of a new family of methacrylate polymers containing pendant oligothiophenes

    Yutaka Ohsedo; Ichiro Imae; Yasuhiko Shirota

    A new family of methacrylate polymers containing pendant terthiophene, quaterthiophene, quinquethiophene, and sexithiophene was synthesized by the radical polymerization of the corresponding methacrylate monomers, and the electrochemical and electrochromic properties were investigated. The anodic oxidation of these polymers in the presence of tetra-n-butylammonium perchlorate as a supporting electrolyte produced radical-cation salts of pendant oligothiophenes with ClO4- as a dopant. The electrochemically oxidized polymers had partially crosslinked structures resulting from the coupling reaction of pendant oligothiophene radical cations, the extent of crosslinking significantly decreasing with the increasing conjugation length of the pendant oligothiophenes. Comparative spectroelectrochemical studies of the monomers in solution and the polymers as solid films showed that π-dimer formation of oligothiophene radical cations took place more readily for the polymer films than for the monomers in solution. This new family of methacrylate polymers containing pendant oligothiophenes constitutes a new class of potential electrochromic materials, undergoing reversible, clear color changes on electrochemical oxidation and reduction., Sep. 2003, Journal of Polymer Science, Part B: Polymer Physics, 41 (21), 2471 - 2484, doi;url;url

    Scientific journal

  • Development of a new class of hole-transporting and emitting vinyl polymers and their application in organic electroluminescent devices

    Daisuke Mutaguchi; Kenji Okumoto; Yutaka Ohsedo; Kazuyuki Moriwaki; Yasuhiko Shirota

    A new class of hole-transporting vinyl polymers, poly{4-vinyl-4'-[bis(4'-tert-butylbiphenyl-4-yl)amino]biphenyl (PVBAB) and poly 4-vinyl-4'-[N,N-bis(9,9-dimethylfluoren-2-yl)amino]biphenyl} (PVFAB), and a new emitting vinyl polymer, poly(2-{4-[4-vinylphenyl(4-methylphenyl)amino]phenyl}-5-dimesitylborylthiophene) (PVPhAMB-1T), were designed and synthesized. These new vinyl polymers form smooth amorphous films with high glass-transition temperatures of ca. 200 degreesC. PVBAB and PVFAB possess electron-donating properties, and PVPhAMB-1T possesses bipolar character with both electron-donating and accepting properties, exhibiting strong fluorescence in solution and as films. Organic electroluminescent devices using PVBAB or PVFAB as a hole-transport layer and N,N'-dimethylquinacridone-doped tris(8-quinolinolato)aluminum as an emitting layer were thermally stable and exhibited very high performance. The use of PVPhAMB-1T as an emitting material also permitted the fabrication of a high-performance, green-emitting organic EL device. (C) 2003 Elsevier B.V. All rights reserved., ELSEVIER SCIENCE BV, Sep. 2003, Organic Electronics: physics, materials, applications, 4 (2-3), 49 - 59, doi;web_of_science;url;url

    Scientific journal

  • Water-swollen hydrogels with pendant terthiophenes

    Li Chen; Jian Ping Gong; Yutaka Ohsedo; Yoshihito Osada

    A chemically cross-linked and water-swollen poly(AA3T-co-AA) gel having pendant terthiophenes was synthesized by radical copolymerization of [(2.2':5',2"-terthiophen-5-yl-)methyl acrylate] (AA3T) and acrylic acid (AA), and its swelling, dissociation, and doping behaviors were studied. The gel swells in high pH solution, which is associated with the dissociation and, hence, electrostatic repulsion of the AA units and the pH value at which the swelling starts increases with increasing AA3T composition. The dissociation of the gels is suppressed, presumably due to the incorporation of the hydrophobic AA3T unit, and, once started, the dissociation could be promoted by AA3T in the low pH region. Poly(AA3T-co-AA) copolymers and gels can be easily electrochemically and chemically doped. The volume change of the gels is observed during doping/undoping and the maximum volume change reached was about 50%., WILEY-V C H VERLAG GMBH, Mar. 2003, Macromolecular Chemistry and Physics, 204 (4), 661 - 665, web_of_science;doi;url;url

    Scientific journal

  • Synthesis, properties, and applications of photochrome amorphous molecular materials and electrochromic polymers

    Yasuhiko Shirota; Hideyuki Nakano; Ichiro Imae; Yutaka Osedo; Hisayuki Utsumi; Toshiki Ujike; Toru Takahashi

    AMER CHEMICAL SOC, Apr. 2002, American Chemical Society, Polymer Preprints, Division of Polymer Chemistry, 43 (1), 53 - 54, web_of_science;url;url

    International conference proceedings

  • Crystalline structure and thermal behavior of water-soluble copolymers with pendant terthiophenes

    Li Chen; Tatsuo Kaneko; Jian Ping Gong; Yoshihito Osada; Yutaka Ohsedo; Yasuhiko Shirota

    The water-soluble copolymers having pendant terthiophene, poly(AA3T-co-AA), were synthesized by radical copolymerization of [(2,2': 5', 2"-terthiophen-5-yl)methyl acrylate] (AA3T) and acrylic acid (AA), and their molecular structures and thermal behaviors were studied, X-ray diffraction study showed that the copolymers containing a certain amount of AA3T can form the crystals with monolayer structure, while incorporation of too many AA units into the copolymers disrupted this structure. Possible mechanism of self-doping on heating was discussed in terms of interaction between AA3T unit with AA unit in the copolymers., WILEY-V C H VERLAG GMBH, Jan. 2002, Macromolecular Chemistry and Physics, 203 (1), 176 - 181, web_of_science;doi;url;url

    Scientific journal

  • Development of a new emitting amorphous molecular material, 2,5-bis-(2-{4-[bis(4-methylphenyl)amino]phenyl}thiophen-5-yl)furan

    Yutaka Ohsedo; Toshihiko Yamate; Kenji Okumoto; Yasuhiko Shirota

    Tokai University, Jun. 2001, Journal of Photopolymer Science and Technology, 14 (2), 297 - 298, doi;url;url

    Scientific journal

  • Electrochromic properties of new methacrylate copolymers containing pendant oligothiophene and oligo(ethyleneoxide) moieties in the presence of a polymer-gel electrolyte

    Yutaka Ohsedo; Ichiro Imae; Yasuhiko Shirota

    Electrochromic properties of new methacrylate copolymers containing pendant terthiophene and oligo(ethyleneoxide) moieties, poly[(2,2':5',2 "-terthiophen-5-yl)methyl methacrylate-co-alpha-ethoxy-omega-methacryloyl-oligo(ethyleneoxide)] (poly(MA3T-co-MAEO)), in the presence of a polymer-gel electrolyte were studied. A polymer-gel electrolyte composed of poly(methylmethacrylate), lithium perchlorate, and propylene carbonate was sandwiched between two indium-tin oxide (ITO)-coated glass substrates, on one of which a film of poly(MA3T-co-MAEO) was coated. The device was found to undergo a color change from yellowish-orange to pale green and vice versa on electrochemical oxidation and reduction. The response times for green coloration and decoloration of a poly(MA3Tco-MAEO) 60/40 film in the presence of the polymer-gel electrolyte were estimated to be 5.3 and 5.5 s, respectively. (C) 2000 Elsevier Science Ltd. All rights reserved., PERGAMON-ELSEVIER SCIENCE LTD, Jan. 2000, Electrochimica Acta, 45 (8), 1543 - 1547, web_of_science;doi;url;url

    Scientific journal

  • Synthesis and electrochromic properties of methacrylate copolymers containing pendant terthiophene and oligo(ethyleneoxide) moieties

    Yutaka Ohsedo; Ichiro Imae; Yasuhiko Shirota

    Novel methacrylate copolymers containing pendant terthiophene and oligo(ethyleneoxide) moieties, poly(2,2':5',2"-terthiophen-5-yl)methyl methacrylate-co-alpha-ethoxy-omega-methacryloyl-(poly (MA3T-co-MAEO)), were prepared by radical copolymerization of the corresponding monomers in varying mole ratios and their application as electrochromic materials examined The copolymers were found to undergo reversible, clear color change from yellowish orange to purple and vice versa on electrochemical doping and dedoping. The response time for color change on electrochemical doping and dedoping was found to decrease for the copolymers than for the corresponding methacrylate homopolymer containing pendant terthiophene., ELSEVIER SCIENCE SA, Jun. 1999, Synthetic Metals, 102 (1-3), 969 - 970, web_of_science;doi;url;url

    Scientific journal

  • Synthesis of a novel family of electrochemically-doped vinyl polymers containing pendant oligothiophenes and their electrical and electrochromic properties

    Ichiro Imae; Kazunari Nawa; Yutaka Ohsedo; Naoki Noma; Yasuhiko Shirota

    Novel electrochemically-doped vinyl polymers containing 2,2':5',2 '':5 '',2'''-quaterthiophene, 4',3'''-dioctyl-2,2':5',2 '':5 '',2''':5''',2''''-quinquethiophene, and 4',3''''-dioctyl-2,2':5',2 '':5 '',2''':5''',2'''':5'''',2'''''-sexithiophene as pendant groups were prepared by anodic polymerizations of the corresponding new vinyl monomers in the presence of tetra-n-butylammonium perchlorate as a supporting electrolyte, and their electrical and electrochromic properties were investigated. The electrochemically-doped polymers, which were obtained as deeply-colored, lustrous films on the surface of the working electrode, were identified as radical-cation salts of pendant oligothiophenes with ClO4- as a dopant, having a partially-cross-linked structure due to the coupling reaction of the radical cation of the pendant oligothiophene moiety. The electrical conductivity of these electrochemically-doped polymers increased with increasing conjugation length of the pendant oligothiophenes; the polymer containing the pendant sexithiophene group exhibited a room-temperature conductivity of ca. 10(-4) S cm(-1) with an activation energy of 0.25 eV. These polymers undergo a reversible clear color change from green to yellow and vice versa on electrochemical dedoping and doping, constituting a novel class of potential electrochromic materials., AMER CHEMICAL SOC, Feb. 1997, Macromolecules, 30 (3), 380 - 386, web_of_science;doi;url;url

    Scientific journal

  • Synthesis and electrochromic properties of a methacrylate polymer containing pendant terthiophene

    Yutaka Ohsedo; Ichiro Imae; Naoki Noma; Yasuhiko Shirota

    A new methacrylate polymer containing terthiophene as a pendant group, poly[(2,2':5',2 ''-terthiophen-5-yl)methyl methacrylate],has been prepared by radical polymerization of the corresponding monomer and its electrochromic properties have been examined. Electrochemical oxidation of the polymer in the presence of tetra-n-butylammonium perchlorate produced a purple-colored electrochemically doped polymer, which was identified as a radical-cation salt of pendant terthiophene with ClO4- as a dopant. The polymer undergoes a reversible clear color change from pale yellow to purple and Vice versa on electrochemical doping and dedoping and is expected to be a potential electrochromic material., ELSEVIER SCIENCE SA LAUSANNE, Aug. 1996, Synthetic Metals, 81 (2-3), 157 - 162, web_of_science;doi;url;url

    Scientific journal

MISC

  • Development of Softmatter for Advanced Materials

    Yutaka Ohsedo

    Mar. 2021, Research Journal of Living Science, 2021, 67 (2), 67 - 71

    Introduction research institution

  • A Creation of Polymer Materials for Soft Robotics Applications

    Yutaka Ohsedo; Atsushi Takashima

    Nov. 2020, Annual Review Vol.21, 2020 Collaborative Research Center, Ashikaga University, 105 - 108, url

    Introduction research institution

  • Mixing Enhancement Effect of Low-Molecular-Weight Gelators on Thixotropic Behavior

    Yutaka Ohsedo

    Oct. 2017, Monthly Fine Chemical, 46 (10), 32 - 40, False

    Introduction commerce magazine

  • Low-Molecular-Weight Gelators as Base Materials for Ointments

    Gels

    Apr. 2016, Gels, 2 (2), 13, True, doi;url;url

    Introduction scientific journal

  • Low-molecular-weight organogelators as functional materials for oil spill remediation

    Yutaka Ohsedo

    Oil spills from tankers are one of the major types of man-made disasters that impact the marine environment, and they have been shown to have long-lasting effects. On prevention of the spread of oil through rapid cleanup of spills, low-molecular-weight organogelators have received much attention because of their ability to tune their properties through rational design. In this mini-review, I present a brief summary of studies focused on the remediation of oil spills via a chemical method, which involves the use of low-molecular-weight organogelators that form organogels with fuel oils or organic solvents. Moreover, recent attempts to create new improved molecular organogels composed of commercially available simple organogelators via a mixing induced enhancement method for solidifying oil are also discussed. In addition, polymer organogelators for oil spills are discussed in relation to low-molecular weight gelators. Copyright (C) 2015 John Wiley & Sons, Ltd., WILEY, 2016, Polymers for Advanced Technologies, 27 (6), 704 - 711, True, doi;web_of_science;url;url

    Introduction scientific journal

  • Mixing Enhancement Effect of Low-Molecular-Weight Gelators

    Yutaka Ohsedo; Hisayuki Watanabe

    Oct. 2013, Journal of the Japan Society of Colour Material, 86, 375 - 379, False, doi;url;url

    Introduction scientific journal

  • 水溶性ポリチオフェンのエレクトロクロミズム

    Yutaka Ohsedo

    Jul. 2002, Kobunshi, 51, 521

    Introduction scientific journal

  • Synthesis, Properties and Applications of π-Conjugated Polymers

    Yasuhiko Shirota; Yutaka Ohsedo

    Feb. 2002, Kobunshi, 51, 66 - 70, False, doi;url;url

    Introduction scientific journal

  • デンドリマーを用いた有機EL素子の特性に及ぼす世代の影響

    Yutaka Ohsedo

    Sep. 2001, Kobunshi, 50, 668

    Introduction scientific journal

  • 無機半導体超微粒子-高分子複合系の多色蛍光発光

    Yutaka Ohsedo

    Dec. 2000, Kobunshi, 49, 848

    Introduction scientific journal

  • 低分子液晶-デンドリマー複合系の光散乱を利用した液晶表示素子への応用

    Yutaka Ohsedo

    Jul. 2000, Kobunshi, 49, 550 - 551

    Introduction scientific journal

  • π電子系有機物質の物性・機能とデバイスへの応用

    城田靖彦; 協力; 中野英之; 景山弘; 大背戸豊; 門田敏明; 奥本健二

    Mar. 2000, 平成12年度新素材技術部会調査報告書、(社)新化学発展協会

    Technical report

  • ポリマー溶液を用いる発光ダイオード

    Yutaka Ohsedo; Tetsuya Noda

    Sep. 1999, Kobunshi, 48, 727 - 728, False

    Introduction scientific journal

  • 電子供与性および電子受容性高分子、高分子固体電解質複合系における光電変換

    Yutaka Ohsedo; Tetsuya Noda

    Jan. 1999, Kobunshi, 48, 43 - 44, False

    Introduction scientific journal

Books etc

  • Colloidal nanosheets ("Inorganic Nanosheets and Nanosheet-Based Materials: Fundamentals and Functions of Two-Dimensional Systems," Teruyuki Nakato, Jun Kawamata, Shinsuke Takagi (Eds.), Part I Chapter 8)

    Nobuyoshi Miyamoto; Yutaka Ohsedo; Teruyuki Nakato

    Springer, Apr. 2017, 542, pp. 201-260, Part I Chapter 8 (ISBN: 9784431564966)

  • アルキルヒドラジド誘導体によるチキソトロピー性超分子ゲル(「低分子ゲルの開発と応用」鈴木正浩監修、第11章3節)

    大背戸 豊

    シーエムシー出版, May 2016, 250, pp. 115-122、第11章3節 (ISBN: 9784781311562)

  • アルキルヒドラジド誘導体の新規低分子オイルゲル化剤への応用(「ゲルの安定化と機能性付与・次世代への応用開発」矢内雅人編、第2章4節)

    大背戸 豊

    技術情報協会, Dec. 2013, 552, pp. 122-126 (ISBN: 9784861045141)

  • Synthesis, Properties, and Applications of Photochromic Amorphous Molecular Materials and Electrochromic Polymers ("Chromogenic Phenomena in Polymers: Tunable Optical Properties (ACS SYMPOSIUM SERIES)," S. A. Jenekhe and D. J. Kiserow (Eds), Chapter 13)

    Yasuhiko Shirota; Hideyuki Nakano; Ichiro Imae; Yutaka Ohsedo; Yoshiaki Yasuda; Hisayuki Utsumi; Toshiki Ujike; Toru Takahashi

    American Chemical Society, Aug. 2004, 456, pp. 173-186 (ISBN: 9780841238305)

Presentations

  • Creation of Electrically Conductive Composite Hydrogels by Use of a Polymer Gelator as a Matrix Material

    Yutaka Ohsedo

    The 101st CSJ Annual Meeting, Online, 21 Mar. 2021, 19 Mar. 2021, 22 Mar. 2021

  • Creation of electrically conductive composite gels by use of a polymer hydrogelator

    Yutaka Ohsedo

    69th Symposium on Macromolecules, September 16 -18, 2020, Ueda Campus, Iwate University (Online), 18 Sep. 2020, 16 Sep. 2020, 18 Sep. 2020

  • Alkylanilides for Mixed Molecular Gels

    Yutaka Ohsedo

    The 100th CSJ Annual Meeting, Noda Campus, Tokyo University of Science, Chiba, Japan, 22 Mar. 2020, 22 Mar. 2020, 25 Mar. 2020

  • Synthesis of Inorganic nanosheet/polyurethane nanocomposite fiber

    諸岡時希, 大背戸豊, 宮元義展

    29th Annual Meeting of MRS-Japan 2019, MRS-J 30th Anniversary Symposium, 27-29 November 2019 Yokohama Japan, 27 Nov. 2019

  • Synthesis nanosheet/epoxy resine composite matrials via gel template

    Toshiki Furukawa, Yutaka Ohsedo, Nobuyoshi Miyamoto

    68th Symposium on Macromolecules, Bunkyo Campus, Fukui University, Fukui, Japan, 25 Sep. 2019, 25 Sep. 2019, 27 Sep. 2019

  • Mixing Enhancement Effect of Low-Molecular-Weight Gelators with Different Alkyl Chains and Hydrogen Bonding Group

    Yutaka Ohsedo

    The 99th CSJ Annual Meeting, Konan University, Kobe, Japan, 18 Mar. 2019, 16 Mar. 2019, 19 Mar. 2019

  • Elastomer and gels hybridized with inorganic nanosheet liquid crystals

    〇Nobuyoshi Miyamoto; Toki Morooka; Toshihki Furukawa; Takumi Inadomi; Yutaka Ohsedo

    67th Symposium on Macromolecules, September 12 -14, 2018, Sapporo Campus, Hokkaido University, 12 Sep. 2018

  • Synthesis of nanosheet/polymer hybrid by hydro gel template

    〇Toshiki Furukawa; Yutaka Ohsedo; Nobuyoshi Miyamoto

    67th Symposium on Macromolecules, September 12 -14, 2018, Sapporo Campus, Hokkaido University, 12 Sep. 2018

  • Synthesis of liquid crystalline nanosheets/polyurethane composite fiber

    Toki Morooka; Yutaka Ohsedo; Nobuyoshi Miyamoto

    67th Symposium on Macromolecules, September 12 -14, 2018, Sapporo Campus, Hokkaido University, 12 Sep. 2018

  • Creation of composite gels by use of a polymer hydrogelator as a matrix material

    〇Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe; Nobuyoshi Miyamoto

    67th Symposium on Macromolecules, September 12 -14, 2018, Sapporo Campus, Hokkaido University, 12 Sep. 2018

  • Synthesis of Nanocomposite Material Using Nanosheet/Hydrogel Composite Polymer for Template

    〇Toshiki Furukawa; Yutaka Ohsedo; Nobuyoshi Miyamoto

    The 5th International Conference on Nanomechanics and Nanocomposites (ICNN5, Fukuoka Institute of Technology, Fukuoka, Japan), 22 Aug. 2018

  • Synthesis of Nanosheet Liquid Crystal Composite Polyurethane Fiber

    Toki Morooka; Yutaka Ohsedo; Nobuyoshi Miyamoto

    The 5th International Conference on Nanomechanics and Nanocomposites (ICNN5, Fukuoka Institute of Technology, Fukuoka, Japan), 22 Aug. 2018

  • Mixing Strategy to Enhance Gel Properties Composed of Low-Molecular-Weight Gelators

    Yutaka Ohsedo

    The 5th International Conference on Nanomechanics and Nanocomposites (ICNN5, Fukuoka Institute of Technology, Fukuoka, Japan), 22 Aug. 2018

  • Squaric acid for creating low-molecular-weight gelators and functional dyes

    Yutaka Ohsedo

    West Japan Nanosheet Society Summer Camp 2018 (WJNS-SC2018, Kaneya Annex, Iki-shi, Nagasaki, Japan), 09 Aug. 2018

  • 酸分解性架橋点を有するナノシート複合型ダブルネットワークポリマーの合成

    古川聡起; 大背戸豊; 宮元展義

    平成29年度インターカレッジセミナー 兼 油化学界面科学部会九州地区講演会、FITセミナーハウス大分(由布市、大分県), 28 Jan. 2018

  • ナノシート/ポリウレタン複合体の合成

    諸岡時希; 大背戸豊; 宮元展義

    平成29年度インターカレッジセミナー 兼 油化学界面科学部会九州地区講演会、FITセミナーハウス大分(由布市、大分県), 27 Jan. 2018

  • 粘土鉱物/ポリイミド複合体の合成

    平田夏樹; 大背戸豊; 宮元展義

    平成29年度インターカレッジセミナー 兼 油化学界面科学部会九州地区講演会、FITセミナーハウス大分(由布市、大分県), 27 Jan. 2018

  • 高分子ヒドロゲル化剤/導電性高分子複合系の創製

    大背戸豊; 猿橋康一郎; 渡邊久幸; 宮元展義

    西日本ナノシート研究会ウインターキャンプ、つえたて温泉ひぜんや(阿蘇郡、熊本県), 02 Dec. 2017

  • 水溶性芳香族ポリアミド系高分子ゲル化剤/無機ナノシート複合分子性ゲルの創製

    大背戸豊; 大野正司; 猿橋康一郎; 渡邊久幸; 宮元展義

    高分子基礎研究会2017、敦賀ニューサンピア(敦賀市、福井県), 24 Nov. 2017

  • Molecular hydrogels composed of new glucamine-based gelators and their thixotropic properties

    〇Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe; Nobuyoshi Miyamoto

    66th Symposium on Macromolecules September 20 -22, 2017, Johoku Campus, Ehime University, 21 Sep. 2017

  • MIXING ENHANCEMENT EFFECT OF MOLECULAR GELS COMPOSED OF HYDROGELATOR WITH LAPONITE ON THIXOTROPIC BEHAVIOR

    〇Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe; Nobuyoshi Miyamoto

    16th INTERNATIONAL CLAY CONFERENCE, CLAYS, FROM THE OCEANS TO SPACE – Granada, Spain 17-21 July 2017, Jul. 2017

  • Thixotropic molecular hydrogels composed of new glucamine-based low-molecular-weight gelators

    〇Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe; Nobuyoshi Miyamoto

    66th SPSJ Annual Meeting May 29-31 2017, Makuhari Messe, Chiba-city, 30 May 2017

  • Synthesis of nanosheet LC/Polyimide Composites

    Natsuki Hirata; Yutaka Ohsedo; Nobuyoshi Miyamoto

    The 11th SPSJ International Polymer Conference (IPC 2016) , Fukuoka International Congress Center, Fukuoka, Japan, December 13 - 16, 2016, 06 Dec. 2016

  • Thixotropic molecular hydrogels composed of new glucamine-based derivatives

    〇Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe; Nobuyoshi Miyamoto

    65th Symposium on Macromolecules September 14 -16, 2016, Yokohama Campus, Kanagawa University, 16 Sep. 2016

  • グリシン-グルカミン構造を中心とする新規低分子ゲル化剤の創製

    大背戸豊

    西日本ナノシート研究会サマーキャンプ 2016、屋久島シーサイドホテル(屋久島町、鹿児島県), 24 Jul. 2016

  • Mixing Enhancement Effect of Low-Molecular-Weight Hydorgelator with Laponite

    〇Yutaka Ohsedo

    The 1st FIT-ME Symposium, Fukuoka Institute of Technology, Fukuoka, May 16 2016, 16 May 2016

  • Glucamine-Based Low-Molecular-Weight Hydrogelators for Thixotropic Hydrogels

    〇Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe

    The 96th CSJ Annual Meeting, March 24-27 2016, Doshisha University, Kyoto, 27 Mar. 2016

  • 水溶性芳香族ポリアミドの高分子ゲル化剤への応用

    大背戸豊

    高分子基礎研究会2015、FITセミナーハウス大分(由布市、大分県), 30 Jan. 2016

  • 有機溶媒分散型ナノシート液晶を利用した無機/ポリイミド複合体の合成

    平田夏樹; 大背戸豊; 宮元展義

    高分子基礎研究会2015、FITセミナーハウス大分(由布市、大分県), 30 Jan. 2016

  • スクアリン酸をゲル形成部位とする新規低分子ゲル化剤の創製

    大背戸豊

    西日本ナノシート研究会サマーキャンプ 2015、芦辺町クオリティライフセンターつばさ、かねや別館(壱岐市、長崎県), 07 Aug. 2015

  • 新規グルカミン系低分子ゲル化剤の創製

    大背戸豊

    西日本ナノシート研究会サマーキャンプ 2015、芦辺町クオリティライフセンターつばさ、かねや別館(壱岐市、長崎県), 07 Aug. 2015

  • Mixing enhancement effect on low-molecular-weight gelator/inorganic nanosheet system

    〇Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe; Nobuyoshi Miyamoto

    64th SPSJ Annual Meeting May 27th-29th 2015, Sapporo Convention Center, Sapporo, 28 May 2015

  • 分子性ヒドロゲルの混合による機能付与

    大背戸豊

    高分子基礎研究会2014、FITセミナーハウス大分 (由布市、大分県), 28 Nov. 2014

  • Creation of thixotropic molecular hydrogels by mixing low-molecular-weight hydrogelators

    〇Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe

    63rd Symposium on Macromolecules September 24 -26, 2014, Nagasaki University, 25 Sep. 2014

  • 混合による分子性ゲルの機能向上と徐放材料への応用

    大背戸豊; 谷口真規子; 大野正司; 猿橋康一郎; 渡邊久幸

    西日本ナノシート研究会サマーキャンプ 2014、民宿 滝の上(壱岐市、長崎県), 19 Jul. 2014

  • Mixing-Induced Thixotropic Behavior of Low-Molecular-Weight Organogelators with Different Alkyl Chains

    〇Yutaka Ohsedo; Masashi Oono; Akihiro Tanaka; Hisayuki Watanabe

    International Symposium on Advanced Soft Materials, October 18, 19, 2013, Hokkaido University, 18 Oct. 2013

  • 低分子ゲル化剤への機能付与-混合による高機能化

    大背戸豊

    西日本ナノシート研究会第2回ワークショップ、FITセミナーハウス大分 (由布市、大分県), 26 Aug. 2013

  • Mixing Enhancement Effect of Low-Molecular-Weight Gelator Homologues with Different Alkyl Chain Lengths

    〇Yutaka Ohsedo; Masashi Oono; Kowichiro Saruhashi; Hisayuki Watanabe

    62nd SPSJ Annual Meeting May 29th-31th Kyoto International Conference Center, 30 May 2013

  • 低分子ゲル化剤の開発-新規材料探索と混合による高機能化

    大背戸豊

    産学連携交流センター入居者交流会、福岡市産学連携交流センター(福岡市、福岡県), 30 May 2013

  • Mixing Enhancement Effect of Low-Molecular-Weight Gelators with Different Alkyl Chains

    〇Yutaka Ohsedo; Hisayuki Watanabe; Kowichiro Saruhashi; Masashi Oono

    The 93th CSJ Annual Meeting March 22-25, 2013, BKC, Ritsumeikan University, 22 Mar. 2013

  • Application of Alkylhydrazide for New Low-Molecular-Weight Gelator and its network properties

    〇Yutaka Ohsedo; Hisayuki Watanabe; Akihiro Tanaka; Masashi Oono

    61st Symposium on Macromolecules September 19 -21, 2012, Nagoya Institute of Technology, 20 Sep. 2012

  • Organogelation ability of Alkylhydrazides

    〇Yutaka Ohsedo; Hisayuki Watanabe; Akihiro Tanaka; Misao Miyamoto

    61st SPSJ Annual Meeting May 29th-31th 2012, Pacifico Yokohama, 29 May 2012

  • Application of Alkylhydrazide for New Low-Molecular-Weight Gelator

    〇Yutaka Ohsedo; Hisayuki Watanabe; Akihiro Tanaka; Misao Miyamoto

    The 92th CSJ Annual Meeting March 25-28, 2012, Hiyoshi Campus, Keio University, 27 Mar. 2012

  • A Creation of New Low-Molecular-Weight Gelators Containing Squaric Acid Moieties

    〇Yutaka Ohsedo; Hisayuki Watanabe; Misao Miyamoto; Akihiro Tanaka; Kazuaki Shikii; Masashi Oono

    East Asia Young Scientists Gel Symposium 2012, January 6th, Hokkaido University, 06 Jan. 2012

  • A Creation of New Low Molecular Weight Gelator Consisting of Squaric Acid Derivatives

    〇Yutaka Ohsedo; Misao Miyamoto; Akihiro Tanaka; Kazuaki Shiiki; Masashi Oono

    60th Symposium on Macromolecules September 28 -30, 2011, Tsushima Campus, Okayama University, 29 Sep. 2011

  • A Creation of New Low Molecular Weight Hydrogelator Containing Strong Acid Moiety

    〇Yutaka Ohsedo; Hisayuki Watanabe; Misao Miyamoto; Akihiro Tanaka; Kazuaki Shikii; Masashi Oono

    60th SPSJ Annual Meeting May 25th-27th 2011, Osaka International Convention Center, 25 May 2011

  • スクアリリウム色素を分光増感剤とするフォトポリマー〜532nmによるホログラム記録〜

    中尾 仁亮, 小関 健一, 山崎 健志, 山野 順三, 大背戸豊

    第57回高分子学会年次大会、パシフィコ横浜(横浜市、神奈川県), May 2008

  • ヒドロキシプロピルセルロース(HPC)誘導体による形状記憶ゲル

    関森裕子, 宮崎崇, 大背戸豊, Gong Jian Ping, 長田義仁

    第38回高分子学会北海道支部研究発表会、北海道大学学術交流会館(札幌市、北海道), Feb. 2004

  • π電子系側鎖基を有する新規ビニル高分子の創製と有機EL素子への応用

    牟田口 大介, 大背戸豊, 奥本 健二, 城田 靖彦

    第12回 ポリマー材料フォーラム、千里ライフサイエンスセンター(豊中市、大阪府), 27 Nov. 2003, 27 Nov. 2003, 28 Nov. 2003

  • ルの表面摩擦特性[ⅩⅩⅡ] ゲルの表面グラフト鎖制御と摩擦特性

    大背戸豊, 高階力也, Gong Jian Ping, 長田義仁

    第52回高分子討論会、山口大学(山口市、山口県), Sep. 2003

  • 独創的高機能材料創製技術の研究開発

    長田義仁(代理演者 大背戸豊)

    平成14年度共同研究推進セミナー産学連携プロジェクト公開フォーラム, Mar. 2003

  • π電子系側鎖基を有する新規ビニル高分子を用いる有機EL素子

    牟田口大介, 大背戸豊, 奥本健二, 城田靖彦

    第51回高分子討論会、九州工業大学(北九州市、福岡県), Oct. 2002

  • π電子系側鎖基を有する新規ビニル高分子の創製と有機EL素子への応用

    牟田口大介, 大背戸豊, 奥本健二, 城田靖彦

    日本化学会第82秋季年会、大阪大学(豊中市、大阪府), Sep. 2002

  • π共役系高分子・π共役系オリゴマーの機能材料への応用

    大背戸豊

    17th Summer University in Hokkaido(高分子学会北海道支部)、新しのつ温泉たっぷの湯(石狩市、北海道), Aug. 2002

  • 剛直主鎖型高分子電解質水溶液の液晶特性と特異な挙動

    船木隆文, 山岡寛司, 大背戸豊, Gong Jian Ping, 長田義仁, 金子達雄, 上田充, 芝崎祐二

    日本化学会北海道支部2002年夏季研究発表会、旭川高専(旭川市、北海道), Jul. 2002

  • π電子系側鎖基を有する正孔輸送性新規ビニル高分子の合成と有機EL素子への応用

    牟田口大介, 大背戸豊, 奥本健二, 城田靖彦

    第48回高分子研究会[神戸] 、兵庫県民会館(神戸市、兵庫県), Jul. 2002

  • π共役系側鎖基を有する光・電子機能性高分子の応用

    大背戸豊

    高分子学会北海道支部会員増強セミナー、(苫小牧市、北海道), Mar. 2002

  • 新規π電子系側鎖基を有するビニル高分子の合成と有機EL素子への応用

    大背戸豊, 奥本健二, 森脇和之, 城田靖彦

    第50回高分子討論会、早稲田大学(東京都), Sep. 2001

  • アモルファス分子材料-オリゴアリレン骨格を有する新規発光性アモルファス分子材料を用いる有機エレクトロルミネッセンス素子の開発

    大背戸豊, 山手俊彦, 奥本健二, 城田靖彦

    第47回高分子研究会[神戸] 、兵庫県民会館(神戸市、兵庫県), Jul. 2001

  • アモルファス分子材料-オリゴアリレン骨格を有する新規発光性アモルファス分子材料の創製

    大背戸豊, 山手俊彦, 奥本健二, 城田靖彦

    フォトポリマーコンファレンス2001、千葉大学(千葉市、千葉県), Jun. 2001

  • SYNTHESIS AND ELECTROCHROMIC PROPERTIES OF NEW METHACRYLATE POLYMERS CONTAINING PENDANT OLIGOTHIOPHENES

    Yutaka Ohsedo, Ichiro Imae, and Yasuhiko Shirota

    7th Asian Symposium on Intelligent Electrophotonic Materials and Molecular Electronics (ASIEMME’7) , Beijing, China, Dec. 2000

  • Electrochromic Properties of Methacrylate Polymers Containing Pendant Oligothiophenes

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    9th PMF, Senri Life Science Center, Osaka, Japan, Nov. 2000

  • Electrochemical and Electrochromic Properties of Methacrylate Polymers Containing Pendant Oligothiophenes

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    49th Symposium on Macromolecules, Tohoku University, Sendai, Japan, Sep. 2000

  • Synthesis of a Novel Methacrylate Polymer Containing Pendant Quaterthiophene and Its Application as an Electrochromic Material

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    SPIJ Annual Meeting 2000, Kikaishinkoukaikan, Tokyo, Japan, May 2000

  • Formation of Dimer of Novel Methacrylate Polymers Containing Pendant Oligothiophenes and Their Electrochromic Properties

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    49th SPSJ Annual Meeting, Kyoto International Conference Center, Kyoto, Japan, May 2000

  • Synthesis of Novel Methacrylate Polymers Containing Oligothiophenes and Their Application as Electrochromic Materials in the Presence of a Polymer-Gel Electrolyte

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    The 78th CSJ Annual Meeting, Funabashi Campus, Nihon University, Funabashi, Japan, Mar. 2000

  • Synthesis of Novel Methacrylate Polymers Containing Pendant Terthiophrnr, Quaterthiophene, Quinquethiophene, and Sexithiophene and Their Application as Electrochromic Materials

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    48th Symposium on Macromolecules, Niigata University, Niigata, Japan, Oct. 1999

  • Synthesis, Electrochemical Oxidation, and Application of Oligothiophenes and Polymers Containing Pendant Oligothiophenes

    Yasuhiko Shirota, Naoki Noma, Ichiro Imae, Yutaka Ohsedo, Souhei Funaoka, Yoji Yamaguchi, HIromitsu Kawamoto

    第23回エレクトロオーガニックケミストリー討論会、アクアリウム長岡(長岡市、新潟県), Jul. 1999

  • SYNTHESIS OF NEW METHACRYLATE POLYMERS CONTAINING PENDANT OLIGOTHIOPHENE AND THEIR APPLICATION AS ELECTROCHROMIC MATERIALS

    Yutaka Ohsedo, Ichiro Imae, and Yasuhiko Shirota

    4th International Symposium on Functional Dyes–Science and Technology of Functional π-Electron Systems, Osaka, Japan, 31 May–4 June 1999, Osaka, JAPAN, 31 May 1999, 04 Jun. 1999

  • Synthesis of a Novel Methacrylate Polymer Containing a Pendant Sexithiophene Moiety and Its Application as an Electrochromic Material

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    48th SPSJ Annual Meeting, Kyoto International Conference Center, Kyoto, Japan, May 1999

  • Synthesis of Novel Methacrylate Polymers Containing Pendant Sexithiophene and Their Application as Electrochromic Materials

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    The76th CSJ Annual Meeting, Kanagawa University, Yokohama, Japan, Mar. 1999

  • Synthesis of Methacrylate Homo- and Copolymers Containing Pendant Oligothiophene and Oligo(ethyleneoxide) Moieties and Their Application as Electrochromic Materials

    Yutaka Ohsedo, Ichiro Imae, and Yasuhiko Shirota

    The Sixth International Symposium on Polymer Electrolytes, 1st - 6th November 1998 (ISPE-Ⅵ) Hayama,Kanagawa, JAPAN, Jul. 1998, 01 Nov. 1998, 06 Nov. 1998

  • Synthesis of Novel Methacrylate Polymers Containing Pendant Quaterthiophene and Quinquethiophene and Their Application as Electrochromic Materials

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    47th Symposium on Macromolecules, Nagoya Congress Center, Nagoya, Japan, Oct. 1998

  • Synthesis and electrochromic properties of methacrylate copolymers containing pendant terthiophene and oligo(ethyleneoxide) moieties

    Yutaka Ohsedo, Ichiro Imae, and Yasuhiko Shirota

    International Conference of Science and Technology of Synthetic Metals, July 12-18 1998 (ICSM’98) Montpellier, FRANCE, 12 Jul. 1998, 18 Jul. 1998

  • Synthesis of a Novel Methacrylate Polymer Containing Pendant Quaterthiophene and Its Application as an Electrochromic Material

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    SPIJ Annual Meeting 1998, Kikaishinkoukaikan, Tokyo, Japan, May 1998

  • Synthesis of a Novel Methacrylate Polymer Containing Pendant Oligothiophene and Its Application as an Electrochromic Material

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    47th SPSJ Annual Meeting, Kyoto International Conference Center, Kyoto, Japan, May 1998

  • Synthesis of New Methacrylate Copolymers Containing Pendant Terthiophene and Oligoethyleneoxide Moieties and Application as an Electrochromic Material

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    SPIJ Annual Meeting 1997, ARCADIA ICHIGAYA, Tokyo, Japan, May 1997

  • ターチオフェンを側鎖に有する新規メタクリレート型共重合体の合成とエレクトロクロミック材料への応用

    大背戸豊, 今栄一郎, 城田靖彦

    第46回高分子学会年次大会、東京工業大学(東京都), May 1997

  • Synthesis and Electrochromic Properties of a Novel Type of Methacrylate Copolymer Containing Pendant Terthiophene and Oligoethyleneoxide

    Yutaka Ohsedo, Ichiro Imae, Yasuhiko Shirota

    The 72th CSJ Annual Meeting, Rikkyo University, Tokyo, Japan, 27 Mar. 1997

  • Synthesis of a Novel Methacrylate Polymer Containing Pendant Terthiophene and Its Application as an Electrochromic Material

    Yutaka Ohsedo, Ichiro Imae, Naoki Noma, Yasuhiko Shirota

    45th SPSJ Annual Meeting, Nagoya Congress Center, Nagoya, Japan, May 1996

  • Synthesys of a Novel Methacrylate Polymer Containing Pendant Terthiophene and Its Application as Electrochromic Material

    Yutaka Ohsedo, Ichiro Imae, Naoki Noma, Yasuhiko Shirota

    The 70th CSJ Annual Meeting, Aoyama Gakuin University, Tokyo, Japan, Mar. 1996

Association Memberships

  • American Chemical Society

  • THE SOCIETY OF SYNTHETIC ORGANIC CHEMISTRY, JAPAN

  • THE CHEMICAL SOCIETY OF JAPAN

  • THE SOCIETY OF POLYMER SCIENCE, JAPAN



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