Temporal Control of Self-Oscillation for Microgels by Cross-Linking Network Structure
Temporal Control of Self-Oscillation for Microgels by Cross-Linking Network Structure
复制标题
通过交联网络结构对微凝胶自振荡的时间控制
DOI：
10.1021/ma800684d
复制
发表时间：
2008
期刊：
影响因子：
5.5
通讯作者：
R. Yoshida
中科院分区：
文献类型：
--
作者：
D. Suzuki;R. Yoshida
自振荡微凝胶是一种自发的、周期性的溶胀/去溶胀振荡。以三（2，2 ′-联吡啶）钌[Ru（bpy）3]为催化剂，N-异丙基丙烯酰胺（NIPAm）为单体，采用无表面活性剂的水相沉淀聚合法，通过Belousov−Zhabotinsky（BZ）反应合成了交联微凝胶。自振荡的微凝胶检测的光学透射率的变化。该微凝胶不仅表现出溶胀/去溶胀振荡（与固定在微凝胶中的Ru（bpy）3配合物的氧化还原振荡同步），而且在微凝胶的相变温度附近还表现出溶胀/分散振荡，并伴随着透光率的显著变化.通过比较微凝胶的透光率变化和固定在微凝胶中的Ru（bpy）3的氧化还原电位变化，进一步研究了微凝胶的振荡。为了分析微凝胶的自组装性能，
Self-oscillating microgel, which undergoes an autonomic and periodical swelling/deswelling oscillation, has been reported. The cross-linked microgels were synthesized by the copolymerization of N-isopropylacrylamide (NIPAm) with ruthenium tris(2,2′-bipyridine) [Ru(bpy)3] as a catalyst for the Belousov−Zhabotinsky (BZ) reaction by surfactant-free aqueous precipitation polymerization. The self-oscillation of the microgels was detected by changes in optical transmittance. The microgels showed not only the swelling/deswelling oscillation, which is synchronized with the redox oscillation of the Ru(bpy)3 complex immobilized in the microgels, but also flocculating/dispersing oscillation around the phase transition temperature of the microgels, with a remarkable change in optical transmittance. These microgel oscillations were further studied by comparing the optical transmittance changes of the microgels and the redox potential change of Ru(bpy)3 immobilized in the microgels. In order to analyze the microgel sel...