pH和CO_2响应性嵌段共聚物的合成及其自组装行为  

Synthesis and Self-assembly Behavior of pH and CO_2-Responsive Block Copolymers

作　　者：卢遥[1] 施冬健[1] 曾金凤[1] 陈益鸣[1] 陈明清[1] 

机构地区：[1]江南大学化学与材料工程学院食品胶体与生物技术教育部重点实验室,江苏无锡214122

出　　处：《精细化工》2014年第3期283-288,共6页Fine Chemicals

基　　金：国家自然科学基金(21004029;51173072)~~

摘　　要：采用可逆加成-断裂链转移自由基聚合(RAFT)和开环聚合(ROP)合成一种具有双重敏感性的聚甲基丙烯酸N,N-二甲氨基乙酯-b-聚乳酸(PDMAEMA-b-PLA)嵌段共聚物。利用傅里叶变换红外光谱(FTIR)、核磁共振波谱(1HNMR)对双亲性嵌段共聚物的结构进行表征;用紫外-可见分光光度计(UV-Vis)、Zeta电位及粒度分析仪和扫描电子显微镜(SEM)研究了其自组装行为及聚集体的大小、形态变化,结果表明,嵌段共聚物在酸性和中性条件下有pH敏感性和CO2响应性,且具有良好的可逆性。Multi-responsive block copolymer poly （dimethylamino-2-ethyl methacrylate ）-block-poly （lactide） （PDMAEMA-b-PLA） was synthesized by ring-opening polymerization （ROP） and reversible addition-fragmentation chain transfer polymerization （RAFT）. The structures of the block copolymers were confirmed by FTIR and I HNMR. The self-assembly behavior of the block copolymers and their particle sizes and morphologies in response to CO2 and pH changes were investigated by ultraviolet spectrophotometer（ UV-Vis）, zeta potential and particle size analyzer and SEM. The results show that the block copolymers have pH sensitivity and CO2 responsiveness, and the responsiveness to environment has good reversibility.

关 键 词：PH敏感性 CO2响应性 自组装行为 功能材料 

分 类 号：TQ325[化学工程—合成树脂塑料工业]