Autonomous unimer-vesicle oscillation by totally synthetic diblock copolymers: effect of block length and polymer concentration on spatio-temporal structures
Autonomous unimer-vesicle oscillation by totally synthetic diblock copolymers: effect of block length and polymer concentration on spatio-temporal structures
复制标题
全合成二嵌段共聚物的自主单聚体囊泡振荡：嵌段长度和聚合物浓度对时空结构的影响
DOI：
10.1039/c7sm00563f
复制
发表时间：
2017
期刊：
影响因子：
3.4
通讯作者：
R. Yoshida
中科院分区：
文献类型：
--
作者：
R. Tamate;T. Ueki;M. Shibayama;R. Yoshida
在本研究中，研究了控制自振荡二嵌段共聚物表现出的自主囊泡振荡的因素。该自振荡双嵌段共聚物以聚环氧乙烷（PEO）为亲水嵌段，以n -异丙基丙烯酰胺（NIPAAm）和钌三（2,2′-联吡啶）（Ru(bpy)3）为侧链，催化Belousov-Zhabotinsky （BZ）反应，为自振荡嵌段。最近，我们的研究小组报道了一种双嵌段共聚物在无催化剂的BZ反应溶液中Ru(bpy)3的周期性氧化还原变化驱动下，表现出独特的自主分解和囊泡重建。然而，在平衡条件下，二嵌段共聚物的结构对囊泡结构的影响，以及它们在非平衡条件下的振荡特性，迄今尚未得到澄清。因此，系统地合成了不同嵌段长度的自振荡双嵌段共聚物，并全面讨论了嵌段长度和聚合物浓度对时空囊泡结构的影响。
In this study, factors controlling autonomous vesicle oscillations exhibited by self-oscillating diblock copolymers were investigated. The self-oscillating diblock copolymer contains poly(ethylene oxide) (PEO) as the hydrophilic block and a random copolymer composed of N-isopropylacrylamide (NIPAAm) with side chains of ruthenium tris(2,2′-bipyridine) (Ru(bpy)3), which catalyzes the Belousov–Zhabotinsky (BZ) reaction, as the self-oscillating block. Recently, our group has reported that a diblock copolymer exhibits a unique autonomous disintegration and reconstruction of the vesicles driven by the periodic redox changes of Ru(bpy)3 in a catalyst-free BZ reaction solution. Nevertheless, the effect of the diblock copolymer architecture on the structure of the vesicles under equilibrium conditions, as well as their oscillation properties under non-equilibrium conditions, has not been clarified thus far. Hence, self-oscillating diblock copolymers with different block lengths were systematically synthesized, and the effects of the block length and polymer concentration on the spatio-temporal vesicle structures were comprehensively discussed.