2013 Fiscal Year Final Research Report
Drying enhancement in phase separating fluids and its application
| Project/Area Number |
23560912
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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 |
Properties in chemical engineering process/Transfer operation/Unit operation
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
YAMAMURA Masato 九州工業大学, 工学(系)研究科(研究院), 教授 (90284588)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 塗布膜 / コーティング / 相分離 / 乾燥促進 / 高分子溶液 / 蛍光イメージング / 非平衡熱力学 |
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| Research Abstract |
In thin film drying process of immiscible polymer blend in a common solvent, spontaneous polymer phase separation promotes the enhancement or suppression of solvent drying in a particular range of solvent concentrations. Simultaneous mass/fluorescent intensity measurements in the course of drying revealed that the drying enhancement takes place in the case when growth rates of phase-separated domains are lower than the critical value of 20 nm/s. The fluorescent microscopy also showed the local solvent enrichment at the interface of polymer domains in drying enhancement mode. These fact imply that the self-assembly of solvent molecules at phase-separating domain interfaces results in formation of solvent diffusion path along the interface, which assists the solvent drying across the liquid film.
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