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An anisotropic hydrogel with electrostatic repulsion between cofacially aligned nanosheets
http://hdl.handle.net/2261/57054
http://hdl.handle.net/2261/57054c337caa7-3404-4839-94af-de60966521f1
名前 / ファイル | ライセンス | アクション |
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nature14060_author_version.pdf (1.3 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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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× Ishida, Yasuhiro× Ebina, Yasuo× Sasaki, Takayoshi× Hikima, Takaaki× Takata, Masaki× Aida, Takuzo |
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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 |
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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 | ||||||
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 | ||||||
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 | ||||||
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 | ||||||
識別子タイプ | URI | |||||
関連識別子 | http://www.nature.com/nature/journal/v517/n7532/abs/nature14060.html |