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Please use this identifier to cite or link to this item: http://hdl.handle.net/10087/3151

Title: Re-entrant volume phase transition of hydrogel membrane of microcapsule
Authors: Yamamoto, Takao
Dobashi, Toshiaki
Suzuki, Daisuke
Narita, Takayuki
Keywords: phase transition
hydrogel membrane
Issue Date: 15-Nov-2004
Publisher: Elsevier
Citation: Colloids and surfaces B: Biointerfaces. 38(3-4), 221-225 (2004)
Abstract: Reentrant 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 reentrant phase transition, we extended the theory for the swelling and the shrinking dynamics of the microcapsule gel (Langmuir 2003, 19, 4051-4054). In the theory, the microcapsule size and the force constant for the driving force which give 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.
URI: http://hdl.handle.net/10087/3151
ISSN: 0927-7765
Appears in Collections:学術雑誌論文

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