Solvent-aided phase separation in hydrogel towards significantly enhanced mechanoresponsive strength

Lu, Haibao, Xing, Ziyu, Chen, Mingji, Yu, Kai and Fu, Yong Qing (2021) Solvent-aided phase separation in hydrogel towards significantly enhanced mechanoresponsive strength. Acta Mechanica Sinica, 37 (5). pp. 757-766. ISSN 0567-7718

Preview

Text Main_manuscript_ams2020_484_revised_version_modified.pdf - Accepted Version Download (1MB) | Preview

Abstract

Understanding working principles and thermodynamics behind phase separations, which have significant influences on condensed molecular structures and their performances, can inspire to design and fabricate anomalously and desirably mechanoresponsive hydrogels. However, a combination of techniques from physicochemistry and mechanics has yet been established for the phase separation in hydrogels. In this study, a thermodynamic model is firstly formulated to describe solvent-aided phase and microphase separations in the hydrogels, which present significantly improved mechanoresponsive strengths. Flory–Huggins theory and interfacial energy equation have further been applied to model the thermodynamics of concentration-dependent and temperature-dependent phase separations. An intricately detailed phase map has finally been formulated to explore the working principle. The thermodynamic methodology of phase separations, combined with the constitutive stress–strain relationships, has a great potential to explore the working mechanisms in mechanoresponsive hydrogels.

Actions (login required)

View Item

Downloads