| PEO–PPO–PEO嵌段共聚物的聚集行为及其在胶团萃取中的应用（英文） |
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| 引用本文： | 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（英文）[J].中国科学院研究生院学报,2005,1(6):767-772. |
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| 作者姓名： | 苏延磊 刘会洲 |
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| 作者单位： | 中国科学院过程工程研究所,北京,100080 |
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| 基金项目： | supported by Innovation Research Group( No. 20221603) and National Nature Science Foundation of China(No. 20490200, No. 20273075) |
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| 摘 要： | 从分子水平研究了PEO-PPO-PEO嵌段共聚物聚集过程中分子基团微环境和构象的变化。FTIR光谱给出了温度、溶剂、嵌段共聚物组成等影响PEO-PPO-PEO嵌段共聚物胶团结构的定量信息。用无机盐和脂肪醇调控PEO-PPO-PEO嵌段共聚物聚集，荧光光谱技术提供了降低PPO链段与水的相互作用，推动嵌段共聚物在水中胶团化的证据。用水凝胶包埋PEO-PPO-PEO嵌段共聚物，实现了萃取水中低浓度多环芳烃的工艺循环。
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| 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 |
| 文章编号： | 1002-1175(2005)06-0767-06 |
| 修稿时间： | 2005年4月4日 |
Aggregation Behavior of PEO-PPO-PEO Block Copolymers and Their Application in Micellar Extraction |
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| SU Yan-Lei,LIU Hui-Zhou.Aggregation Behavior of PEO-PPO-PEO Block Copolymers and Their Application in Micellar Extraction[J].Journal of the Graduate School of the Chinese Academy of Sciences,2005,1(6):767-772. |
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| Authors: | SU Yan-Lei LIU Hui-Zhou |
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| Institution: | Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China |
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| 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. |
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| Keywords: | PEO-PPO-PEO block copolymer FTIR spectroscopy fluorescence spectroscopy aggregation behavior micellar extraction |
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