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.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2014年第3期283-288,共6页
Fine Chemicals
基金
国家自然科学基金(21004029
51173072)~~
关键词
PH敏感性
CO2响应性
自组装行为
功能材料
pH sensitivity
CO2 responsiveness
self-assembly behavior
functional materials
