中国科学院研究生院学报2005，Vol.22Issue(6)：767-772,6.
PEO-PPO-PEO嵌段共聚物的聚集行为及其在胶团萃取中的应用
Aggregation Behavior of PEO-PPO-PEO Block Copolymers and Their Application in Micellar Extraction
摘要
Abstract
Changes of microenvironment and micellar properties of poly(ethylene oxide)-poly (propylene oxide)-poly(ethylene oxide)(PEO-PPO-PEO)block copolymers were investigated on the molecular level.The Fourier transform infrared(FTIR) results showed that quantitative information of micelle structure of PEO-PPO-PEO block copolymer based on the effect of temperature, solvent and composition. Effects of alkali halide salts and aliphatic alcohol upon the thermally induced controlled aggregation of PEO-PPO-PEO block copolymers have been examined by fluorescence spectrum. There is a competition between ether oxygen atoms of the polymer and the ions for available water of hydration, which indirectly weakens the interaction of polymer with water and results in a decrease in the solubility of polymer in water. The extraction capacity of hydrogel is enhanced dramatically by encapsulating PEO-PPO-PEO block copolymers. The alginate hydrogel can be reused through a process of drying, reverse-extraction and regeneration.关键词
PEO-PPO-PEO嵌段共聚物/FTIR光谱/荧光光谱/聚集行为/胶团萃取Key words
PEO-PPO-PEO block copolymer/FTIR spectroscopy/fluorescence spectroscopy/aggregation behavior/micellar extraction分类
化学化工引用本文复制引用
苏延磊,刘会洲..PEO-PPO-PEO嵌段共聚物的聚集行为及其在胶团萃取中的应用[J].中国科学院研究生院学报,2005,22(6):767-772,6.基金项目
supported by Innovation Research Group( No. 20221603) and National Nature Science Foundation of China(No. 20490200, No. 20273075) （ No. 20221603）
