Bulk self-assembly and ionic conductivity of a block copolymer containing an azobenzene-based liquid crystalline polymer and a poly(ionic liquid)
Bulk self-assembly and ionic conductivity of a block copolymer containing an azobenzene-based liquid crystalline polymer and a poly(ionic liquid)
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含有偶氮苯类液晶聚合物和聚离子液体的嵌段共聚物的本体自组装和离子电导率
DOI：
10.1039/c6py02187e
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发表时间：
2017-03
影响因子：
4.6
通讯作者：
Zhou Qi-Feng
中科院分区：
文献类型：
--
作者：
Zhang Yu-Dong;Ping Jing;Wu Qi-Wei;Pan Hong-Bing;Fan Xing-He;Shen Zhihao;Zhou Qi-Feng
将氮氧化物介导的嵌段共聚与后官能化和离子交换相结合，合成了一系列含有偶氮苯基侧链液晶(LC)聚合物和含咪唑基聚离子液体(PIL)的嵌段共聚物。本文所研究的BCP的LC块是poly(4-[12-(4-butyl-4′-oxy-azobenzene)dodecyl]oxycarbonylstyrene)(PAZO)，而PIL块是poly(4-vinylbenzylhexylimidazoliumbis(trifluoromethanesulfonyl)imide)(PIL(TFSI))。据我们所知，这是第一个同时具有PIL和LC聚合物嵌段的BCP系列。在这一系列BCP中，PIL(TFSI)嵌段完全电离，而聚合物组成各不相同。当PIL(TFSI)的质量分数为29.7%时，BCP自组装成六方堆积圆柱形(HEX)结构。对于PIL(TFSI)含量为56.5wt%的BCP，当Pazo嵌段为LC时，它自组装成层状(LAM)结构；当Pazo嵌段进入各向同性状态时，BCP自组装成HEX结构，这归因于PIL(TFSI)与Pazo之间在高于Pazo清除温度时界面更灵活。当PIL(TFSI)的质量分数为65.3%时，BCP的纳米结构在加热过程中保持LAM。含65.3wt%PIL(TFSI)的BCP在40℃和140°C时的离子电导率分别为4.45×10−5和5.81×10−4 S cm−1，表明该BCP可用作固体聚合物电解质。
By combining nitroxide-mediated block copolymerization with post functionalization and ion exchange, a series of block copolymers (BCPs) containing an azobenzene-based side-chain liquid crystalline (LC) polymer and an imidazolium-containing poly(ionic liquid) (PIL) were synthesized. The LC block of the BCPs studied herein is poly(4-[12-(4-butyl-4′-oxy-azobenzene)dodecyl]oxycarbonylstyrene) (PAzo), while the PIL block is poly(4-vinylbenzylhexylimidazoliumbis(trifluoromethanesulfonyl)imide) (PIL(TFSI)). As far as we know, this is the first series of BCPs having both PIL and LC polymer blocks. In this series of BCPs, the PIL(TFSI) blocks are totally ionized, while the polymer compositions are varied. When the weight fraction of PIL(TFSI) is 29.7%, the BCP self-assembles into a hexagonally packed cylindrical (HEX) structure. For the BCP with 56.5 wt% PIL(TFSI), it self-assembles into a lamellar (LAM) structure when the PAzo block is LC; and it changes into a HEX structure when the PAzo block enters into the isotropic state, which is attributed to the more flexible interface between PIL(TFSI) and PAzo at temperatures above the clearing temperature of PAzo. When the weight fraction of PIL(TFSI) is 65.3%, the nanostructure of the BCP remains LAM during heating. The ionic conductivities of the BCP with 65.3 wt% PIL(TFSI) at 40 and 140 °C are 4.45 × 10−5 and 5.81 × 10−4 S cm−1, respectively, which indicates that the BCP can be used as a solid polymer electrolyte.
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影响因子：
2.5
作者：
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通讯作者：
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