华东理工大学学报（自然科学版）2018，Vol.44Issue(2)：189-194,210,7.DOI:10.14135/j.cnki.1006-3080.20170314002
两亲性嵌段共聚物合成及亲疏水链段质量比对自组装形貌的影响
Synthesis of Amphiphilic Block Copolymer and Effect of Mass Ratio of the Hydrophilic and Hydrophobic Segments on the Self-assembly Morphology
摘要
Abstract
Self-assembly is generally a spontaneous organization driven by non-covalent interactions including hydrogen bonds,Van der Waals forces and electrostatic force,leading to well-controlled nanostructures and materials.Among the building blocks for self-assembly,diblock copolymers with two segments containing different chemical groups could be applied to prepare multiple responsive materials, which have been widely used in a variety of fields covering adsorbents,catalysts,coatings,biosciences and materials science due to their microscopic dimensions and their responsiveness to specific stimuli.For example, by combining segments with pH- and temperature-responses, it is possible to form macromolecules that response to both temperature and pH.In this paper,amphiphilic block copolymer PAA-b-PMAEFc was obtained by hydrolysis of block copolymer PtBA-b-PMAEFc,which was synthesized by the atom transfer radical polymerization(ATRP)with t-butyl acrylate and 2-(methacryloyloxy)ethyl ferrocene-carboxylate as monomers and ethyl-2-bromoisobutyrate as ATRP agent.Proton nuclear magnetic resonance spectroscopy(1 H-NMR)and gel permeation chromatograph(GPC)were used to characterize the chemical structure, molecular weight and molecular weight distribution. The critical micelle concentration(CMC)of the polymer was determined by fluorescence spectrophotometer.The self-assembly behaviors and structures of PAA-b-PMAEFc were investigated by DLS and TEM.The results showed that the proportion of the amphiphilic block copolymer PAA-b-PMAEFc had a significant effect on the assembly in aqueous solution.Vesicles and spherical aggregates form w hen the mass ratio of the hydrophilic and hydrophobic segments was high,while rod-like structure appeared when the segments mass ratio decreased.关键词
嵌段共聚物/链段质量比/两亲性/自组装Key words
block copolymer/segments mass ratio/amphiphilic/self-assembly分类
化学化工引用本文复制引用
刘柱,杲云,曹红亮..两亲性嵌段共聚物合成及亲疏水链段质量比对自组装形貌的影响[J].华东理工大学学报（自然科学版）,2018,44(2):189-194,210,7.基金项目
国家自然科学基金(21574039,51173044) （21574039,51173044）
纤维材料改性国家重点实验室项目(LK1614) （LK1614）
