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Single-particle light scattering study of polyethyleneglycol-grafted poly(ureaurethane) microcapsule in ethanol

発表形態:
原著論文
主要業績:
主要業績
単著・共著:
共著
発表年月:
2004年
DOI:
会議属性:
指定なし
査読:
有り
リンク情報:

日本語フィールド

著者:
Yamamoto, T., Dobashi, T., Suzuki, D., Narita, T.
題名:
Single-particle light scattering study of polyethyleneglycol-grafted poly(ureaurethane) microcapsule in ethanol
発表情報:
Colloids and Surfaces B: Biointerface 巻: 38 ページ: 221-225
キーワード:
概要:
抄録:
Re-entrant volume phase transition of hydrogel wall membrane of microcapsules (MC) was first observed using MC suspensions consisting of poly (l-lysine-alt-terephthalic acid) wall and aqueous inner and outer solutions with different pHs. To analyze the dynamics of the re-entrant phase transition, we extended the theory for the swelling and the shrinking dynamics of the microcapsule gel [T. Narita, T. Yamamoto, D. Suzuki, T. Dobashi, Langmuir 19 (2004) 4051]. In the theory, the microcapsule size and the force constant for the driving force which gives rise to the size relaxation were chosen as the thermodynamic variables. The time course of the cross-sectional area of the microcapsules fitted well to the theoretical equations, and the time constants determined as the fitting parameters were discussed in terms of the force constant relaxation and the size relaxation.

英語フィールド

Author:
Yamamoto, T., Dobashi, T., Suzuki, D., Narita, T.
Title:
Single-particle light scattering study of polyethyleneglycol-grafted poly(ureaurethane) microcapsule in ethanol
Announcement information:
Colloids and Surfaces B: Biointerface Vol: 38 Page: 221-225
An abstract:
Re-entrant volume phase transition of hydrogel wall membrane of microcapsules (MC) was first observed using MC suspensions consisting of poly (l-lysine-alt-terephthalic acid) wall and aqueous inner and outer solutions with different pHs. To analyze the dynamics of the re-entrant phase transition, we extended the theory for the swelling and the shrinking dynamics of the microcapsule gel [T. Narita, T. Yamamoto, D. Suzuki, T. Dobashi, Langmuir 19 (2004) 4051]. In the theory, the microcapsule size and the force constant for the driving force which gives rise to the size relaxation were chosen as the thermodynamic variables. The time course of the cross-sectional area of the microcapsules fitted well to the theoretical equations, and the time constants determined as the fitting parameters were discussed in terms of the force constant relaxation and the size relaxation.


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