Bending of bi‐gels
Bending of bi‐gels
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DOI：
10.1063/1.472200
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发表时间：
1996-09
影响因子：
4.4
通讯作者：
Xiaomin Zhang;Zhibing Hu;Yong Li
中科院分区：
文献类型：
--
作者：
Xiaomin Zhang;Zhibing Hu;Yong Li
已经研究了双凝胶的弯曲作为温度、丙酮浓度和NaCl浓度的函数。双凝胶由丙烯酰胺在一侧，丙烯酰胺和N-异丙基丙烯酰胺的互穿聚合物网络在另一侧组成。双凝胶实现的最大弯曲应变约为0.85。本文报告的双凝胶的弯曲机制是由于工程结构异质性，与之前由外部梯度场诱导的均匀凝胶弯曲相反。讨论了双凝胶的动力学行为。使用理论模型来估计双凝胶在纯水和盐溶液中的IPN侧的集体扩散系数Dc。结果与光散射法所得结果一致。
The bending of bi‐gels has been studied as a function of temperature, acetone concentration, and NaCl concentration. The bi‐gels consist of acrylamide on one side, and the interpenetrating polymer networks of acrylamide and N‐isopropylacrylamide on the other side. The maximum bending strain achieved by the bi‐gel is about 0.85. The bending mechanism of the bi‐gels reported here is due to the engineered structure heterogeneity, in contrast with previous homogeneous gel bending which is induced by external gradient fields. The kinetic behavior of the bi‐gel is discussed. A theoretical model is used to estimate the collective diffusion coefficient Dc of the IPN side of the bi‐gels in pure water and in salt solution. The results agree with those obtained by the light‐scattering method.