Self-assembly of amphiphilic random co-poly(ionic liquid)s: the effect of anions, molecular weight, and molecular weight distribution
Self-assembly of amphiphilic random co-poly(ionic liquid)s: the effect of anions, molecular weight, and molecular weight distribution
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两亲性无规共聚（离子液体）的自组装：阴离子、分子量和分子量分布的影响
DOI：
10.1039/c3py00460k
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发表时间：
2013-07-21
影响因子：
4.6
通讯作者：
Yan, Feng
中科院分区：
文献类型：
--
作者：
Guo, Jiangna;Zhou, Yinxia;Yan, Feng
研究了两亲性无规共聚离子液体在水溶液中的自组装行为。通过对氯甲基苯乙烯的可逆加成断裂链转移（RAFT）聚合，再与甲基咪唑（或乙烯基咪唑）进行后聚合，合成了一种咪唑类均聚物聚（1-（4-乙烯基苄基）-3-甲基咪唑氯化物）（PIL-[Cl]）。PIL-[Cl]与PF 6 −阴离子的部分阴离子交换产生了两亲性无规共聚物PIL-[Cl]x[PF 6]y（后缀x，y表示Cl−和PF 6 −阴离子的相对摩尔比）。PIL-[Cl]x[PF 6]y在水溶液中的自组装形态作为共聚物组成（阴离子），分子量和分子量分布的函数进行了研究。PIL-[Cl]x[PF 6]y球形胶束的尺寸随着分子量分布的增加而显著增大，而阴离子和分子量对胶束尺寸的影响不大。此外，两亲性无规离子共聚物与乙烯基咪唑基团的自组装产生胶体体，这可能是由于乙烯基咪唑基团的聚合。
Self-assembly behavior of amphiphilic random co-poly(ionic liquid)s in aqueous solution was investigated in this work. An imidazolium-type homopolymer, poly(1-(4-vinylbenzyl)-3-methyl imidazolium chloride) (denoted as PIL-[Cl]), was synthesized via reversible addition fragmentation chain transfer (RAFT) polymerization of p-chloromethyl styrene, and followed by post-polymerization with methylimidazole (or vinylimidazole). Partial anion-exchange of PIL-[Cl] with PF6− anions yielded amphiphilic random copolymers, PIL-[Cl]x[PF6]y (suffixes x, y represent the relative molar ratio of Cl− and PF6− anions). Self-assembly morphologies of PIL-[Cl]x[PF6]y in aqueous solution as a function of copolymer composition (anions), molecular weight, and molecular weight distribution were investigated. The size of well-defined PIL-[Cl]x[PF6]y spherical micelles increased dramatically with increasing molecular weight distribution, while the anions and molecular weight show little effect on the micelle size. Furthermore, self-assembly of amphiphilic random ionic copolymers with the vinylimidazole groups yielded colloidosomes, which might be due to the polymerization of vinylimidazole groups.