文献类型：期刊文献

中文题名：三亲性二嵌段共聚物共混体系的自组装行为

英文题名：Self-Assembly Behavior of Triphilic Diblock Copolymer Blends

作者：刘静[1];丁艳玲[1];刘小云[1];谭正[1];庄启昕[1]

机构：[1]华东理工大学材料科学与工程学院,特种功能高分子材料及相关技术教育部重点实验室,上海200237

年份：2020

卷号：46

期号：2

起止页码：197

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：国家自然科学基金(51573045,51773060);上海市自然科学基金(16ZR1407700)。

语种：中文

中文关键词：含氟共聚物;三亲;共混;自组装

外文关键词：fluorinated copolymer;triphilic;blend;self-assembly

摘要：选用聚乙二醇(PEG)、聚苯乙烯(PS)和聚甲基丙烯酸八氟戊酯(POFPMA)分别作为亲水、亲油和亲氟段,通过原子转移自由基聚合(ATRP)和单电子转移自由基聚合(SET-LRP)分别制备PEG-PS和PEG-POFPMA共聚物,并构建三亲性二嵌段共聚物共混体系PEGPS/PEG-POFPMA,同时探讨了嵌段聚合度和浓度对组装体形貌的影响。结果表明:改变疏水段聚合度,可以得到球形、多孔球形、囊泡形、纺锤状和蠕虫状胶束等多种形貌的自组装体,形貌在低浓度时较易调控,相图可用于指导聚合前靶向预定的纳米组装体。
A series of triphilic diblock copolymer blends,consisting of hydrophilic poly(ethylene glycol)monomethyl ether(PEG),hydrophobic polystyrene(PS)and superhydrophobic poly(1H,1H,5H-octafluoropentyl methacrylate)(POFPMA),were blended with two diblock copolymers PEG-PS and PEG-POFPMA.The two copolymers were successfully synthesized by atom transfer radical polymerization(ATRP)and single electron transfer living radical polymerization(SET-LRP),and were characterized by nuclear magnetic resonance(NMR)and gel permeation chromatography(GPC).Hydrophobic segments have been regarded as one of the most important limited factors for the preparation of nano-assemblies in aqueous solution.The transformation of a series of PEG-PS/PEGPOFPMA nano-assemblies were investigated by changing the polymerization degree of hydrophobic PS and superhydrophobic POFPMA,which were confirmed by dynamic light scattering(DLS),transmission electron microscope(TEM)and scanning electron microscopy(SEM).The results indicated that adjusting the ratio of the double hydrophobic blocks was an effective way to obtain rich assembled morphologies of the triphilic diblock blends,including spherical micelles,porous spheres,vesicles,spindle-like micelles and worm-like micelles.In addition,selfassembly based on one typical blend at different concentrations was also investigated,and it was obvious that the morphology evolved from the porous sphere to the coil structure,then to vesicle with the increase of concentration.The assembled morphologies of the blends changed from strip micelles to dendritic micelles,vesicles and porous spheres,and eventually led to the formation of spherical micelles by increasing the length of PS,but they were mainly affected by low concentration of the blends.Two detailed and regular binary phase diagrams based on the above results were concluded and served as a reliable reference for targeting predetermined nanoparticles before polymerization.