Sol–Gel Coexisting Phase of Polymer Microgels Triggers Spontaneous Buckling
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- Keisuke Koyanagi
- Department of Applied Physics, Tokyo University of Agriculture and Technology, Naka-cho 2-24-16, Koganei, Tokyo 184-8588, Japan
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- Kazue Kudo
- Department of Computer Science, Ochanomizu University, Otsuka 2-1-1, Bunkyo, Tokyo 112-8610, Japan
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- Miho Yanagisawa
- Department of Applied Physics, Tokyo University of Agriculture and Technology, Naka-cho 2-24-16, Koganei, Tokyo 184-8588, Japan
書誌事項
- 公開日
- 2019-01-14
- 資源種別
- journal article
- 権利情報
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- https://doi.org/10.15223/policy-029
- https://doi.org/10.15223/policy-037
- https://doi.org/10.15223/policy-045
- DOI
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- 10.1021/acs.langmuir.8b03751
- 公開者
- American Chemical Society (ACS)
この論文をさがす
説明
Mechanical buckling is a ubiquitous phenomenon of elastic bodies like core-shell microgels. Although conventional theory predicts that sufficiently high pressure is the primary factor inducing the buckling of core-shell microgels, they often buckle spontaneously without applying pressure. We explored such spontaneous buckling of microgels by introducing interfacial tension between the gel phase of the shell and sol phase of the core. Thus, we found that the core-shell microgels in a sol-gel coexisting phase with a certain shell thickness ratio exhibit spontaneous buckling. According to our theoretical analysis, spontaneous buckling occurs due to the balance between the gel elasticity E and interfacial tension γ when the characteristic length γ/ E is comparable to the microgel size R. Moreover, we found that the ratio between γ/ E and R determines the buckling condition of the shell thickness ratio. Our findings establish an important framework for applying spontaneous buckling to the shape control of elastic bodies.
収録刊行物
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- Langmuir
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Langmuir 35 (6), 2283-2288, 2019-01-14
American Chemical Society (ACS)
