PEO-PPO-PEO嵌段共聚物的聚集行为及其在胶团萃取中的应用

doi:10.7523/j.issn.2095-6134.2005.6.017

中国科学院大学学报 ›› 2005, Vol. 22 ›› Issue (6): 767-772.DOI: 10.7523/j.issn.2095-6134.2005.6.017

PEO-PPO-PEO嵌段共聚物的聚集行为及其在胶团萃取中的应用

苏延磊, 刘会洲

中国科学院过程工程研究所, 北京 100080

收稿日期:2005-04-04 发布日期:2005-11-15
通讯作者: LIU Hui-Zhou:E-mail:hzliu@home.ipe.ac.cn
作者简介:苏延磊:1999年9月至2003年2月在中国科学院过程工程研究所攻读博士学位期间，发表了16篇论文,SCI收录10篇；获得2004 年中国科学院首届优秀博士论文奖。导师刘会洲研究员:主要研究方向为分离科学与工程

Aggregation Behavior of PEO-PPO-PEO Block Copolymers and Their Application in Micellar Extraction

SU Yan-Lei, LIU Hui-Zhou

Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

Received:2005-04-04 Published:2005-11-15
Supported by:
supported by Innovation Research Group(No.20221603)and National Nature Science Foundation of China(No.20490200,No.20273075)

摘要/Abstract

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。

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

Abstract:

Changes of microenvironment and micellar properties of poly (ethylene oxide)2poly (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.

Key words: PEO-PPO-PEO block copolymer, FTIR spectroscopy, fluorescence spectroscopy, aggregation behavior, micellar extraction

中图分类号:

O648

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]. 中国科学院大学学报, 2005, 22(6): 767-772.

SU Yan-Lei, LIU Hui-Zhou. Aggregation Behavior of PEO-PPO-PEO Block Copolymers and Their Application in Micellar Extraction[J]. , 2005, 22(6): 767-772.

参考文献

[1] Su YL,Wang J,Liu HZ.Formation of a Hydrophobic Microenviroment in Aqueous PEO-PPO-PEO Block Copolymer Solutions Investigated by Fourier Transform Infrared Spectroscopy.Journal of Physical Chemistry B,2002,106:11823～11828.

[2] Su YL,Wang J,Liu HZ.FTIR Spectroscopy Study on Effects of Temperature and Polymer Composition on the Structural Properties of PEO-PPO-PEO Block Copolymer Micelles.Langmuir,2002,18:5370～5374.

[3] Su YL,Wang J,Liu HZ.FTIR Spectroscopic Investigation of Effects of Temperature and Concentration on PEO-PPO-PEO Block Copolymer Properties in Aqueous Solutions.Macromolecules,2002,35:6426～6431.

[4] Su YL,Wang J,Liu HZ.Melt,Hydration and Micellization of the PEO-PPO-PEO Block Copolymer Studied by FTIR Spectroscopy.Journal of Colloid and Interface Sciences,2002,251 (2):417～423.

[5] Su YL,Liu HZ,Guo C,et al.Association Behavior of PEO-PPO-PEO Block Copolymers in Water or Organic Solvent Observed by FTIR Spectroscopy.Molecular Simulation,2003,29 (12):803～808.

[6] Su YL,Liu HZ,Wang J,et al.Study of Salt Effects on the Micellization of PEO-PPO-PEO Block Copolymer in Aqueous Solution by FTIR Spectroscopy.Langmuir,2002,18:865～871.

[7] Su YL,Wei XF,Liu HZ.Effect of Sodium Chloride on Association Behavior of Poly(ethylene oxide)-Poly(propylene oxide)-Poly(ethylene oxide) Block Copolymer in Aqueous Solutions.Journal of Colloid and Interface Science,2003,264:526～531.

[8] Su YL,Wei XF,Liu HZ.Influence of 1-Pentanol on the Micellization of Poly(ethylene oxide)-Poly(propylene oxide)Block Copolymers in Aqueous Solutions.Langmuir,2003,19:2995～3000.

[9] Su YL,Guo C,Liu HZ.Studied on the PEO-PPO-PEO Black Copolymer Release from Alginate Hydrogel.Chemical Research in Chinese Universities,2001,17:341～346.

[10] Su YL,Liu HZ.Temperature-Dependent Solubilization of PEO-PPO-PEO Block Copolymers and Their Application for Extraction Trace Organics from Aqueous Solutions.Korean J.Chem.Eng.,2003,20 (2):343～346.

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

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