Search Results 1-20 of 57

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Double network hydrogels based on semi-rigid polyelectrolyte physical networks

Takahashi Riku , Ikai Takuma , Kurokawa Takayuki , King Daniel Rudolf , Gong Jian Ping

Journal of materials chemistry B, Materials for biology and medicine 7(41), 6347-6354, 2020-11-09

IR
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Preparation of Inorganic/Organic Double-Network Ion Gels Using a Cross-Linkable Polymer in an Open System

Kamio Eiji , Kinoshita Masayuki , Yasui Tomoki , Lodge Timothy P. , Matsuyama Hideto

Macromolecules 53(19), 8529-8538, 2020-10-13

IR
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Control of seed formation allows two distinct self-sorting patterns of supramolecular nanofibers

Kubota Ryou , Nagao Kazutoshi , Tanaka Wataru , Matsumura Ryotaro , Aoyama Takuma , Urayama Kenji , Hamachi Itaru

自己組織化する分子繊維のネットワークを種形成の制御で作り分けることに成功 --人工スマートマテリアル設計の新機軸として期待--. 京都大学プレスリリース. 2020-08-26.

Nature Communications (11), 2020-08-14

IR
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Inorganic/organic nanocomposite ion gels with well dispersed secondary silica nanoparticles

Yasui Tomoki , Kamio Eiji , Matsuyama Hideto

… We have previously reported tough inorganic/organic nanocomposite (NC) ion gels composed of silica particles and poly(N,N-dimethylacrylamide) (PDMAAm) networks and a large amount of ionic liquid. … In this study, the network structure and toughening mechanism of NC ion gels were investigated. … The NC ion gels showed characteristic mechanical properties; …

RSC Advances 10(24), 14451-14457, 2020-04-09

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Energy dissipation via the internal fracture of the silica particle network in inorganic/organic double network ion gels

Yasui Tomoki , Fujinami So , Hoshino Taiki , Kamio Eiji , Matsuyama Hideto

… Inorganic/organic double network (DN) ion gels, which are composed of an inorganic silica particle network, an organic poly(N,N-dimethylacrylamide) (PDMAAm) network, and a large amount of ionic liquid, showed excellent mechanical strength of over 25 MPa compression fracture stress at an 80 wt% ionic liquid content. …

Soft Matter 16(9), 2363-2370, 2020-03-07

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Preparation of tough, thermally stable, and water-resistant double-network ion gels consisting of silica nanoparticles/poly(ionic liquid)s through photopolymerisation of an ionic monomer and subsequent solvent removal

Watanabe Takaichi , Takahashi Ruri , Ono Tsutomu

… We report the preparation of tough, thermally stable, and water-resistant double-network (DN) ion gels, which consist of a partially-clustered silica nanoparticle network and poly(ionic liquid) (PIL) network holding an ionic liquid. …

Soft Matter 16(6), 1572-1581, 2019-12-23

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Tough Double-Network Gels and Elastomers from the Nonprestretched First Network

Nakajima Tasuku , Ozaki Yuhei , Namba Ryo , Ota Kumi , Maida Yuki , Matsuda Takahiro , Kurokawa Takayuki , Gong Jian Ping

ACS Macro Letters 8(11), 1407-1412, 2019-11-19

IR
8

Tough and stretchable inorganic/organic double network ion gel containing gemini-type ionic liquid as a multiple hydrogen bond cross-linker

Yasui Tomoki , Kamio Eiji , Matsuyama Hideto

… Tough and stretchable inorganic/organic double network ion gels containing gemini-type ionic liquids with two OH groups in the di-cation, which can work as multiple hydrogen bond-based weak cross-linkers of the gel networks, are developed. …

RSC Advances 9(21), 11870-11876, 2019-04-16

IR
9

Toughening Mechanism of Double Network Gels and New Research Trends [in Japanese]

KIYAMA Ryuji , GONG Jian Ping

… <p>In 2003, we developed Double Network (DN) hydrogels that achieved toughening by a completely different principle from previously existed rubbery materials. … One network is rigid and brittle from highly pre-stretched and densely crosslinked polymer, and the other network is soft and stretchable from coiled and sparsely crosslinked polymer. …

NIPPON GOMU KYOKAISHI 92(9), 352-356, 2019

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TetraPEG Network Formation via a Michael Addition Reaction in an Ionic Liquid: Application to Polymer Gel Electrolyte for Electric Double-layer Capacitors

Yoshitake Mari , Han Jihae , Sakai Takamasa , Morita Masayuki , Fujii Kenta

… <p>Polymer network formation via Michael addition of two tetra-arm poly(ethylene glycol) (TetraPEG) prepolymers possessing maleimide (MA) and thiol (SH) terminals was investigated in a typical aprotic ionic liquid containing a basic catalyst. … The gelation reaction proceeded successfully at room temperature to give high network connectivity (∼98%). …

Chemistry Letters 48(7), 704-707, 2019

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Influence on Particle Double-Network Gels by Gamma Irradiation and Improvement of Radiation Tolerance [in Japanese]

KIKUCHI Katsuya , HIRANO Katsuhiko , KUROSAWA Kouichi , KAWAKAMI Masaru , FURUKAWA Hidemitsu

<p>高強度ゲルである微粒子調製ダブルネットワーク(P-DN)ゲルに対し，放射線を照射した際の影響を調べ，耐放射線性の向上に取り組んだ．これまでにさまざまな有機系高分子材料の耐放射線性が調べられているが，近年開発されたP-DNゲルの耐放射線性を調べた研究例はない．本研究では，P-DNゲルに対し集積線量0.1 MGyのガンマ線を照射して圧縮試験および含水率測定を実施し，照射によるP-DN …

KOBUNSHI RONBUNSHU 76(3), 241-247, 2019

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Inorganic/Organic Double-Network Ion Gels with Partially Developed Silica-Particle Network

Yasui Tomoki , Kamio Eiji , Matsuyama Hideto

… Tough inorganic/organic composite network gels consisting of a partially developed silica-particle network and a large amount of an ionic liquid, named micro-double-network (mu-DN) ion gel, are fabricated via two methods. …

Langmuir 34(36), 10622-10633, 2018-09-11

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Creating stiff, tough, and functional hydrogel composites with low-melting-point alloys

Takahashi Riku , Sun Tao Lin , Saruwatari Yoshiyuki , Kurokawa Takayuki , King Daniel R. , Gong Jian Ping

Advanced Materials 30(16), 1706885, 2018-04-19

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Analysis of frequency accompanying change of moisture content of Ringing gel [in Japanese]

KAMEYAMA Takaaki , IIJIMA Tetsuro , YOSHIDA Kazunari , KAWAKAMI Masaru , FURUKAWA Hidemitsu

The Proceedings of the Materials and processing conference 2018.26(0), 917, 2018

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Synthesis of Particle Double-Network Gels by Redox Polymerization [in Japanese]

KIKUCHI Katsuya , HIRANO Katsuhiko , KUROSAWA Kouichi , IIJIMA Tetsuro , TAMATE Hideaki , KAWAKAMI Masaru , FURUKAWA Hidemitsu

レドックス重合で自由造形可能な高強度ゲルである微粒子調製ダブルネットワーク(P-DN)ゲルを合成した．一般的な光重合ではなくレドックス重合を用いることにより反応時間が短縮され，大量合成時に有利と考えられる．本研究では最適な開始剤および触媒の比率を決定するため，各々の比率のみを変えたP-DNゲルを数種類合成し，圧縮試験および走査型顕微光散乱装置による測定を行った．開始剤および触媒比率は小さいほうが， …

KOBUNSHI RONBUNSHU 75(4), 381-386, 2018

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Mechanical Properties of Particle Double-Network Gels and Scanning Microscopic Light Scattering Analysis of their Internal Structure [in Japanese]

ABE Mei , SAKAI Kazuyuki , TAMAMUSHI Hironori , KAWAKAMI Masaru , FURUKAWA Hidemitsu

筆者らは，3Dプリンター技術に応用できる，高強度かつ三次元自由造形可能な微粒子調製ダブルネットワークゲル(P-DNゲル)の研究を行っている．P-DNゲルは，ダブルネットワークゲルと同様，硬く脆い網目構造(1stゲル)と柔軟で伸張性に優れた網目構造(2ndゲル)との異なる二種類の構造をもつモノマーから構成されているが，1stゲルに …

KOBUNSHI RONBUNSHU 74(6), 594-602, 2017

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17

Transparent gel engineering materials for 3D gel printing [in Japanese]

TASE Taishi , OTA Takafumi , OKADA Koji , TAKAMATSU Kyuichiro , SAITO Azusa , KAWAKAMI Masaru , FURUKAWA Hidemitsu

… We also found that the maximum tensile stress was improved about 1.3 times by changing the blend ratio of 1st gel powder and 2nd gel solution in the preparation of particle-double network gels (P-DN gel). …

Transactions of the JSME (in Japanese) 83(849), 17-00003-17-00003, 2017

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150 Frictional properties of high strength gels [in Japanese]

KAMEYAMA Toshiki , WADA Masato , MAKINO Masato , KAWAKAMI Masaru , FURUKAWA Hidemitsu

The Proceedings of Conference of Tohoku Branch 2016.51(0), 97-98, 2016

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Study on Mechanical Model of Double Network Hydrogel with Extremely High Strength [in Japanese]

RIKU Isamu , MIMURA Koji

… 超高強度Double Networkゲル(DNゲル)は二重網目構造をもつ超高強度ゲルであるため，生物医工学および高分子ネットワークの物理に関する基礎研究への応用が期待されている．より一層DNゲルの高強度化メカニズムを活かし，その使途を広げるために，本研究では，非アフィン分子鎖網目モデルを用い，メゾスケールでのネットワークの構造変化を考慮したDNゲルの力学モデルの構築を試みた．その結果 …

KOBUNSHI RONBUNSHU 72(12), 765-772, 2015

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Preparation of hydrogels for the study of the effects of spatial confinement on DNA [in Japanese]

Nakano Shu-ichi , Yoshida Masatoshi , Yamaguchi Daisuke , Sugimoto Naoki

… Hydrogels forming a network structure have been used as a model for investigating the effect of a confined molecular environment on proteins but not on nucleic acids. … The present study developed a method for preparing agarose and polyacrylamide gels for measuring the thermal stability of a double-stranded DNA polymer poly(dA)/poly(dT) in a confined environment. …

Transactions of the Materials Research Society of Japan 39(4), 435-438, 2014

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