2013 Fiscal Year Final Research Report
Statistical-mechanical study on anisotropic gel formation process based on motion of the phase boundary and its application
| Project/Area Number |
23540475
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biophysics/Chemical physics
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| Research Institution | Gunma University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
DOBASHI Toshiaki 群馬大学, 理工学研究院, 教授 (30155626)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 異方性ゲル / 熱力学的不安定性 / moving boundary描像 / 拡散律速 / 界面律速 / 乾燥 / 透析 / マイクロレオロジー |
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| Research Abstract |
We studied the processes of the anisotropic gelation of the polymer solutions by drying and dialysis, focusing attention on motion of the sol-gel phase boundary. It was found that thermodynamic instability at the phase boundary induces the anisotropic gelation. The orientation dynamics of the polymers in the thermodynamically-unstable state was constructed. The generalized moving boundary (GMB) picture expressing the gelation process induced by both the inflow and the outflow ions was constructed and a new method for controlling the gelation process on the basis of the GMB picture was developed. We developed an idea giving a unified understanding of the two types of the gelation dynamics, the diffusion limited dynamics for dialysis gelation and the interface energy limited dynamics for drying gelation on the basis of the rate of the thermodynamic destabilization.
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