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A surface flattening method for characterizing the surface stress, drained Poisson's ratio and diffusivity of poroelastic gels
| Title: | A surface flattening method for characterizing the surface stress, drained Poisson's ratio and diffusivity of poroelastic gels |
| Authors: | Liu, Zezhou Browse this author | | Hui, Chung-Yuen Browse this author | | Jagota, Anand Browse this author | | Gong, Jian Ping Browse this author →KAKEN DB | | Kiyama, Ryuji Browse this author |
| Issue Date: | 21-Aug-2021 |
| Publisher: | Royal Society of Chemistry (RSC) |
| Journal Title: | Soft Matter |
| Volume: | 17 |
| Issue: | 31 |
| Start Page: | 7332 |
| End Page: | 7340 |
| Publisher DOI: | 10.1039/D1SM00513H |
| Abstract: | When a poroelastic gel is released from a patterned mold, surface stress drives deformation and solvent migration in the gel and flattens its surface profile in a time-dependent manner. Specifically, the gel behaves like an incompressible solid immediately after removal from the mold, and becomes compressible as the solvent is able to squeeze out of the polymer network. In this work, we use the finite element method (FEM) to simulate this transient surface flattening process. We assume that the surface stress is isotropic and constant, the polymer network is linearly elastic and isotropic, and that solvent flow obeys Darcy’s law. The short-time and long-time surface profiles can be used to determine the surface stress and drained Poisson’s ratio of the gel. Our analysis shows that the drained Poisson’s ratio and the diffusivity of the gel can be obtained using interferometry and high-speed video microscopy, without mechanical measurement. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/86600 |
| Appears in Collections: | 生命科学院・先端生命科学研究院 (Graduate School of Life Science / Faculty of Advanced Life Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 龔 剣萍 (Gong Jian Ping)
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