厦门大学学报（自然科学版）2018，Vol.57Issue(3)：308-316,9.DOI:10.6043/j.issn.0438-0479.201706010
双重响应性POSS基嵌段共聚物的合成及其溶液自组装行为的研究
Synthesis of Double-responsive POSS-based Block Copolymer and Study on Its Self-assembly Behavior in Solution
摘要
Abstract
POSS-based block copolymers,PMAPOSS-b-(PNIPAM-co-PAA),with double reactivity were prepared via reversible ad-dition-fragmentation chain transfer polymerization (RAFT)using methacrylate isobutyl polyhedral oligomericsilsesquioxane (MA-POSS),and temperature-responsive N-isopropyl acrylamide (NIPAM) and pH-responsive acrylic acid (AA ) as functional monomers.And dynamic light scattering (DLS),UV-vis and fluorescence spectroscopies were used to study the temperature- and pH-responsive behaviors of POSS-based block copolymers.The results showed that when the pH was small,the particle size increased obviously,while at a higher pH,the micelle size was stable.When the temperature was lower than lower critical solution temperature (LCST),the PNIPAM segment was stretched and the particle size of the block copolymer micelle was larger.When the temperature was higher than LCST,the particle size of the block copolymer micelle became smaller.Under the acidic condition, pyrene in pyrene-copolymer micelles could be released in a very short time,and the release rate was related to the hydrophobic chain length.When the environmental temperature of pyrene-copolymer micelles was higher than LCST,pyrene could also be released.关键词
POSS基嵌段共聚物/pH响应性/温度响应性Key words
POSS-based block copolymer/pH-responsive/temperature-responsive分类
通用工业技术引用本文复制引用
孙晓晴,曹杰,李纪录,何锴慰,许一婷,戴李宗..双重响应性POSS基嵌段共聚物的合成及其溶液自组装行为的研究[J].厦门大学学报（自然科学版）,2018,57(3):308-316,9.基金项目
国家自然科学基金(51573150,51673161) （51573150,51673161）
福建省技术重大研发平台项目(2014H2006) （2014H2006）
福建省科技重大项目(2013HZ0005-1) （2013HZ0005-1）
