2012 Fiscal Year Final Research Report
Four-dimensional Mapping of Local Viscoelastic Functions: A Proposal for the Picture of Hierarchical Heterogeneity in Physical Properties of Polymers
| Project/Area Number |
23655106
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Polymer chemistry
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| Research Institution | Kyushu University |
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Principal Investigator |
TANAKA Keiji 九州大学, 大学院・工学研究院, 教授 (20325509)
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| Co-Investigator(Kenkyū-buntansha) |
SHUNDO Atsuomi 九州大学, 大学院・工学研究院, 助教 (40585915)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 光ピンセット / 粒子追跡法 / マイクロレオロジ- |
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| Research Abstract |
A novel methodology using optical tweezers for local rheological measurements in soft materials has been established. By using this, we have found that there exists a spatial heterogeneity in the viscoelastic properties of a supramolecular hydrogel, a lyotropic liquid crystal, etc. Notably, the heterogeneity in a worm-like micelle solution strongly depended on the measurement frequency. Also, it was found that a sol-to-gel transition process of a supramolecular polymer solution was accompanied by a homogenization of the physical properties.
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