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説明:

Polymer gels with biphasic architectures enable diverse functions, such as enhanced mechanical robustness and programmable drug release. Conventional fabrication of biphasic gels typically relies on the copolymerization of monomers with differing solvent affinities, which constrains structural diversity and tunability. In this study, we introduce “polymerization-induced solvent phase separation” (PI-SPS) as a novel and facile solvent-driven strategy for constructing biphasic gels. Polymerization of a homogeneous precursor solution containing two mutually immiscible solvents and a monomer triggers solvent demixing, yielding a hierarchical structure in which a polymer-rich continuous phase composed of the good solvent encapsulates dispersed droplets of the less favorable solvent-rich phase. We demonstrate the generality of PI-SPS across systems comprising water, organic solvents, and ionic liquids. The resulting biphasic architectures confer emergent properties, including self-healing ability, shape-memory behavior, and enhanced crack resistance, with a fracture energy of 4600 J m–2 derived from the spatial organization of solvent domains and polymer networks. Overall, the PI-SPS strategy provides a versatile platform for engineering multiphase soft materials through controlled tuning of solvent affinities.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Gels, Biphasic, Ionic liquids, Ion gels, Solvent phase separation, Self-healing, Shape-memory

刊行年月日: 2026-07-01

出版者: American Chemical Society (ACS)

掲載誌:

• Journal of the American Chemical Society (ISSN: 00027863) vol. 39 issue. 8

研究助成金:

• Japan Society for the Promotion of Science 23K26409
• Japan Society for the Promotion of Science 26K01248

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1021/jacs.6c03722

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更新時刻: 2026-08-24 10:05:43 +0900

MDRでの公開時刻: 2026-08-24 12:27:03 +0900