2010 Fiscal Year Final Research Report
Structural Estimation and Dynamics of Polymer-grafted Particle at Soft Interfaces
| Project/Area Number |
19750099
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Polymer chemistry
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
MOURI Emiko Kyushu Institute of Technology, 大学院・工学研究院, 助教 (60380721)
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| Project Period (FY) |
2007 – 2010
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| Keywords | 高分子グラフト微粒子 / 気水界面 / 油水界面 / 液液界面 / 粒子膜 / π-A等温線 |
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| Research Abstract |
We have studied polymer-grafted submicron particle monolayer system at the air/water interface, and we have found that methacrylate polymers grafted from particle are fairly extended at the air/water interface. Here, we present the behaviors of polymer-grafted polystyrene latex in particle layer formation at the air/water and oil/water interfaces by surface pressure (π)-occupied area (A) isotherms. Surface pressure, π, of poly(methyl methacrylate)-grafted polystyrene latex (PSL-PMMA) layer and poly(n-butyl methacrylate)-grafted polystyrene latex (PSL-PnBMA) at decane/water interface began to increase surface pressure at larger occupied area compared with those at the air/water interface by 20%. Furthermore, we estimated elastic modulus of particle layer from π-A isotherms at each interface. Elastic modulus of particle layer at decane/water interface showed lower values compared with those at the air/water interface. Polymer chain move more easily in the octane phase than in the air, which contributes the lower elastic modulas in particle monolayer at octane/water system. PSL-PMMA particle monolayer showed higher values of elastic modulas compared with those of PSL-PnBMA at either air/water and decane/water interfaces, which suggested PSL-PMMA formed harder particle monolayer than PSL-PnBMA.
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