%0 Journal Article
%T Aggregation Behavior of PEO-PPO-PEO Block Copolymers and Their Application in Micellar Extraction<br>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）
%A SU Yan-Lei
%A LIU Hui-Zhou
%A <br>苏延磊
%A 刘会洲
%J 中国科学院研究生院学报
%D 2005
%I 
%X 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.
%K PEO-PPO-PEO block copolymer
%K FTIR spectroscopy
%K fluorescence spectroscopy
%K aggregation behavior
%K micellar extraction<br>PEO-PPO-PEO嵌段共聚物
%K FTIR光谱
%K 荧光光谱
%K 聚集行为
%K 胶团萃取
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=67CDFDECD959936E166E0F72DE972847&aid=5D68918A32ADDD3B&yid=2DD7160C83D0ACED&vid=CA4FD0336C81A37A&iid=B31275AF3241DB2D&sid=70081086C74F4110&eid=FAC9AF09A23B46DD&journal_id=1002-1175&journal_name=中国科学院研究生院学报&referenced_num=0&reference_num=10