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  1. 113 工学系研究科・工学部
  2. 40 化学生命工学専攻
  3. 1134010 学術雑誌論文
  1. 0 資料タイプ別
  2. 10 学術雑誌論文
  3. 014 自然科学

An anisotropic hydrogel with electrostatic repulsion between cofacially aligned nanosheets

http://hdl.handle.net/2261/57054
c337caa7-3404-4839-94af-de60966521f1
名前 / ファイル ライセンス アクション
nature14060_author_version.pdf nature14060_author_version.pdf (1.3 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2015-07-01
タイトル
タイトル An anisotropic hydrogel with electrostatic repulsion between cofacially aligned nanosheets
言語
言語 eng
キーワード
主題 Gels and hydrogels
主題Scheme Other
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Liu, Mingjie

× Liu, Mingjie

WEKO 2538

Liu, Mingjie

Search repository
Ishida, Yasuhiro

× Ishida, Yasuhiro

WEKO 2539

Ishida, Yasuhiro

Search repository
Ebina, Yasuo

× Ebina, Yasuo

WEKO 2540

Ebina, Yasuo

Search repository
Sasaki, Takayoshi

× Sasaki, Takayoshi

WEKO 2541

Sasaki, Takayoshi

Search repository
Hikima, Takaaki

× Hikima, Takaaki

WEKO 2542

Hikima, Takaaki

Search repository
Takata, Masaki

× Takata, Masaki

WEKO 2543

Takata, Masaki

Search repository
Aida, Takuzo

× Aida, Takuzo

WEKO 2544

Aida, Takuzo

Search repository
著者所属
著者所属 RIKEN Center for Emergent Matter Science
著者所属
著者所属 National Institute for Materials Science, International Center for Materials Nanoarchitectonics
著者所属
著者所属 RIKEN SPring-8 Center
著者所属
著者所属 Department of Chemistry and Biotechnology, School of Engineering
抄録
内容記述タイプ Abstract
内容記述 Machine technology frequently puts magnetic or electrostatic repulsive forces to practical use, as in maglev trains, vehicle suspensions or non-contact bearings. In contrast, materials design overwhelmingly focuses on attractive interactions, such as in the many advanced polymer-based composites, where inorganic fillers interact with a polymer matrix to improve mechanical properties. However, articular cartilage strikingly illustrates how electrostatic repulsion can be harnessed to achieve unparalleled functional efficiency: it permits virtually frictionless mechanical motion within joints, even under high compression. Here we describe a composite hydrogel with anisotropic mechanical properties dominated by electrostatic repulsion between negatively charged unilamellar titanate nanosheets embedded within it. Crucial to the behaviour of this hydrogel is the serendipitous discovery of cofacial nanosheet alignment in aqueous colloidal dispersions subjected to a strong magnetic field, which maximizes electrostatic repulsion and thereby induces a quasi-crystalline structural ordering over macroscopic length scales and with uniformly large face-to-face nanosheet separation. We fix this transiently induced structural order by transforming the dispersion into a hydrogel using light-triggered in situ vinyl polymerization. The resultant hydrogel, containing charged inorganic structures that align cofacially in a magnetic flux, deforms easily under shear forces applied parallel to the embedded nanosheets yet resists compressive forces applied orthogonally. We anticipate that the concept of embedding anisotropic repulsive electrostatics within a composite material, inspired by articular cartilage, will open up new possibilities for developing soft materials with unusual functions.
内容記述
内容記述タイプ Other
内容記述 UTokyo Research掲載「縦に硬く、横にしなやかな新物質」 URI: http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/simple-synthetic-hydrogel-is-hard-vertically-and-supple-horizontally/
内容記述
内容記述タイプ Other
内容記述 UTokyo Research "Simple synthetic hydrogel is hard vertically and supple horizontally" URI: http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/simple-synthetic-hydrogel-is-hard-vertically-and-supple-horizontally/
書誌情報 Nature

巻 517, p. 68-72, 発行日 2015-01-01
ISSN
収録物識別子タイプ ISSN
収録物識別子 0028-0836
ISSN
収録物識別子タイプ ISSN
収録物識別子 1476-4687
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA00752384
DOI
関連識別子
識別子タイプ DOI
関連識別子 info:doi/10.1038/nature14060
権利
権利情報 Copyright (C) 2015, the authors.
著者版フラグ
値 author
出版者
出版者 Nature Publishing Group
関係URI
関連識別子
識別子タイプ URI
関連識別子 http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/simple-synthetic-hydrogel-is-hard-vertically-and-supple-horizontally/
関係URI
関連識別子
識別子タイプ URI
関連識別子 http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/simple-synthetic-hydrogel-is-hard-vertically-and-supple-horizontally/
関係URI
関連識別子
識別子タイプ URI
関連識別子 http://www.nature.com/nature/journal/v517/n7532/abs/nature14060.html
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