Volume Oscillation of Microphase-Separated Gel
Volume Oscillation of Microphase-Separated Gel
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DOI：
10.1002/macp.201200448
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发表时间：
2013-02-12
影响因子：
2.5
通讯作者：
Hashimoto, Shuji
中科院分区：
文献类型：
--
作者：
Maeda, Shingo;Hashimoto, Shuji
本文讨论了微相分离自振荡凝胶在体积相变温度以上的体积振荡现象。自振荡凝胶由N-异丙基丙烯酰胺（NIPAAm）和用于BelousovZhabotinsky（BZ）反应的金属催化剂组成，该反应被称为振荡反应。阐明了温度对周期和自振荡行为的影响。凝胶的体积变化由FloryHuggins相互作用参数的变化来解释，这是由于金属催化剂（Ru（bpy）32+ Ru（bpy）33+）低于体积相变温度的价态变化引起的聚合物链的水合和脱水引起的。与此相反，凝胶的体积变化是由Donnan渗透压的变化来解释的。
In this study, The volume oscillation of the microphase-separated, self-oscillating gel above the volume phase transition temperature is discussed. The self-oscillating gel is composed of N-isopropylacrylamide (NIPAAm) with a metal catalyst for the BelousovZhabotinsky (BZ) reaction, which is known as the oscillating reaction. The influence of temperature on the period and the self-oscillating behavior is clarified. The volume change of the gel is explained by a change of the FloryHuggins interaction parameter, , which is induced by the hydration and dehydration of the polymer chain due to a valance change of the metal catalyst (Ru(bpy)32+ Ru(bpy)33+) below the volume phase-transition temperature. In contrast, the volume change of the gel is explained by a change of the Donnan osmotic pressure.