Raspberry-Shaped Composite Microgel Synthesis by Seeded Emulsion Polymerization with Hydrogel Particles
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- Daisuke Suzuki
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda 386-8567, Japan
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- Chiaki Kobayashi
- Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda 386-8567, Japan
書誌事項
- 公開日
- 2014-06-12
- 資源種別
- journal article
- DOI
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- 10.1021/la5017752
- 公開者
- American Chemical Society (ACS)
この論文をさがす
説明
A series of raspberry-shaped composite microgels were synthesized by the seeded emulsion polymerization of styrene with hydrogel particles. Thermoresponsive microgels of poly(N-isopropylacrylamide) cross-linked with N,N'-methylenebis(acrylamide) acted as cores for the polymerization. During the surfactant-free polymerization, the core microgels shrank at 70 °C to provide thermoresponsive composite microgels, and the polystyrene particles attached to core microgels became bigger with increasing styrene concentration. Conversely, composite microgels synthesized with sodium dodecyl sulfate (SDS) ([SDS]6.5 mM) did not exhibit thermoresponsive deswelling behavior because polystyrene particles covered the core microgels. In particular, polystyrene particles formed composites on the microgel surface as well as inside the microgels when the SDS concentration exceeded a critical value for core microgel swelling at 70 °C. A mechanism is proposed based on these results for the seeded emulsion polymerization of water-immiscible monomers with microgels.
収録刊行物
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- Langmuir
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Langmuir 30 (24), 7085-7092, 2014-06-12
American Chemical Society (ACS)
