Ionic liquid-crystalline network polymers formed by sulfonic acid-containing polysiloxanes and pyridinium compounds
Ionic liquid-crystalline network polymers formed by sulfonic acid-containing polysiloxanes and pyridinium compounds
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DOI：
10.1016/j.eurpolymj.2018.01.038
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发表时间：
2018-03
影响因子：
6
通讯作者：
Xiaodong Wang;Lu Bai;Xinqiao Tang;Yingyu Gao;Dongfang Pan;Xiaozhi He;Fanbao Meng
中科院分区：
文献类型：
--
作者：
Xiaodong Wang;Lu Bai;Xinqiao Tang;Yingyu Gao;Dongfang Pan;Xiaozhi He;Fanbao Meng
在一个聚合物体系中，离子聚集体和介晶的自组装体现了材料整合分子间相互作用和功能的能力。合成了一系列含有胆固醇衍生物、硅氧烷主链和离子型吡啶磺酸基的离子液晶网络聚合物（ILCN），并对其表征、自组装行为和可能的应用进行了讨论。ILCN是由胆甾-5-烯-3-醇-（3β）-4-（烯丙氧基）苯甲酸酯、4-（烯丙氧基）苯磺酸和聚（甲基氢）硅氧烷合成的含磺酸前体聚合物制成的。ILCN显示出立方介晶相和近晶A（SmA）介晶相。SmA层发展鞍展曲率，并采用无限小表面的形状，因此，由于离子静电吸引和来自手性胆固醇元素的不对称性，发生双连续立方相的自组装。ILCN的大的离子电导率和显著的热稳定性为离子传输装置提供了有希望的机会，因为它们提供了促进的离子传输途径，包括近晶有序和三维互连的离子通道。
Self-assembly of both ionic aggregates and mesogens in one polymer system represents the capability integrating intermolecular interactions and functions of materials. A series of ionic liquid-crystalline network polymers (ILCNs) containing cholesterol derivatives, siloxane backbone and ionic pyridinium sulfonic groups are synthesized, and the characterization, self-assembly behavior, and possible applications are discussed. The ILCNs are made from sulfonic acid-containing precursor polymers synthesized by use of cholest-5-en-3-ol-(3β)-4-(allyloxy)benzoate, 4-(allyloxy)benzenesulfonic acid and poly(methylhydro)siloxane. The ILCNs show a cubic mesophase and a smectic A (SmA) mesophase. The SmA layers develop saddle splay curvature and adopt the shape of infinite minimal surfaces, therefore self-assembly of bicontinuous cubic phases takes place due to ionic electrostatic attraction and asymmetry derived from the chiral cholesterol elements. Large ionic conductivity and remarkable thermal stability of the ILCNs provide promising opportunities for ion transport devices because they provides facilitated ion-transport pathways including smectic ordering and three-dimensional interconnected ionic channels.