Network elasticity of a model hydrogel as a function of swelling ratio : from shrinking to extreme swelling states

• Hoshino, Ken-ichi

• Nakajima, Tasuku

• Matsuda, Takahiro

• Sakai, Takamasa

• Gong, Jian Ping

抄録

n this work, we intended to investigate the relationship between the swelling ratio Q and Young's modulus E of hydrogels from their contracted state to extreme swelling state and elucidate the underlining molecular mechanism. For this purpose, we used tetra-poly(ethylene glycol) (tetra-PEG) gel, whose network parameters are well known, as the polymer backbone, and we succeeded in tuning the swelling of the gel by a factor of 1500 times while maintaining the topological structure of the network unchanged, using an approach combining a molecular stent method and a PEG dehydration method. A master curve of Q–E, independent of the method of obtaining Q, was obtained. Using the worm-like chain model, the experimentally determined master curve can be well reproduced. We also observed that the uniaxial stress–strain curve of the hydrogel can be well predicted by the worm-like chain model using the structure parameters determined from the fitting of the Q–E experimental curve.

収録刊行物

• Soft matter

  Soft matter 14 (47), 9693-9701, 2018-12-21

  Royal Society of Chemistry

キーワード

• Condensed Matter Physics
• General Chemistry

詳細情報

• CRID: 1050282814162321408
• NII論文ID: 120006775545
• NII書誌ID: AA12068335
• DOI: 10.1039/c8sm01854e
• ISSN: 17446848
• ISSN: 1744683X
• HANDLE: 2115/76352
• Web Site: http://pubs.rsc.org/en/content/articlepdf/2018/SM/C8SM01854E
• 本文言語コード: en
• 資料種別: journal article
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