Studies of Gel Structure and Thermal Deswelling on Poly(N-isopropylacrylamide) Gel Treated by Freeze-Drying.
Studies of Gel Structure and Thermal Deswelling on Poly(N-isopropylacrylamide) Gel Treated by Freeze-Drying.
复制标题
冷冻干燥处理聚（N-异丙基丙烯酰胺）凝胶的凝胶结构和热消溶胀研究。
DOI：
10.1246/bcsj.73.1089
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发表时间：
2000
影响因子：
4
通讯作者：
F. Takahashi
中科院分区：
文献类型：
--
作者：
N. Kato;Hiroto Hasegawa;F. Takahashi
Fast-responsive deswelling of poly(N-isopropylacrylamide) gel after a freeze-dry (FD) treatment was investigated by means of SEM images and a kinetic method using a N-isopropylacrylamide (NIPAAm) monomer from the viewpoint of the mesoscopic structure comprising a partitioned polymer-network. It was deduced from SEM images that an elastic frame comprising a partitioned polymer-network is formed by a hydrophobic interaction between polymer chains in the FD-treated gel. Fast-deswelling of the FD-treated gel results from the elasticity of a partitioned polymer-network caused water to release. The kinetic parameters on deswelling of both the conventional gel and the FD-treated gel were determined in the presence of an NIPAAm monomer. This monomer in solution is considered to play two directly-opposed roles in making a skin on the surface of the conventional gel: One is for disturbing the formation of hydrogen bonding between amide groups in the polymer; the other is for accelerating the separation of hydrated ...
