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1、第61卷第7期化工学报Vol161No172010年7月CIESCJournalJuly2010综述与专论PEO2PPO2PEO嵌段共聚物在水溶液中的自组装行为及其应用梁向峰,郭晨,刘庆芬,刘会洲(中国科学院过程工程研究所,中国科学院绿色过程与工程重点实验室,北京100190)摘要:聚氧乙烯2聚氧丙烯2聚氧乙烯(PEO2PPO2PEO)嵌段共聚物是一类重要的非离子表面活性剂,在选择性溶剂中可以自组装成多种形貌的介观结构。对PEO2PPO2PEO嵌段共聚物在水溶液中自组装行为进行了综述,介绍了其自组装行为的实验研究技术;阐明了嵌段共聚物构型、分子量、温度、浓度、添加
2、剂等因素对PEO2PPO2PEO嵌段共聚物聚集行为的调控和作用机理;介绍了嵌段共聚物自组装特性的热力学模型、分子模拟及计算机预报等研究方法和研究进展;重点介绍了PEO2PPO2PEO嵌段共聚物在介孔材料制备、药物载体、生物大分子分离、嵌段共聚物修饰等方面的应用。关键词:嵌段共聚物;临界胶团温度;临界胶团浓度;自组装行为;调控;应用中图分类号:O648文献标识码:A文章编号:0438-1157(2010)07-1693-20Self2assemblyofPEO2PPO2PEOblockcopolymerinaqueoussolutionanditsapplicati
3、onLIANGXiangfeng,GUOChen,LIUQingfen,LIUHuizhou(InstituteofProcessEngineering,ChineseAcademyofSciences,KeyLaboratoryofGreenProcessandEngineering,ChineseAcademyofSciences,Beijing100190,China)Abstract:Water2solublepoly(ethyleneoxide)2poly(propyleneoxide)2poly(ethyleneoxide)(PEO2PPO2PEO)t
4、riblockcopolymersarehigh2molecular2weightnonionicsurfactants,whichexhibitthericheststructuralpolymorphisminselectivesolvents1Oneofthemostinterestingfeaturesofthetriblockcopolymersistheirself2associationinaqueoussolutionsandtheirrichphasebehavior1Themicrostructureresultingfromtheself2a
5、ssemblyofthetriblockcopolymercanvaryfromnormalmicellesinsolution,throughalltypesofnormalandreverselyotropicliquidcrystals(normalmicellarcubic,normalhexagonal,normalbicontinuouscubic,lamellar,reversebicontinuouscubic,reversehexagonal,reversemicellarcubic),toreversemicelles,astherelativ
6、evolumefractionoftheapolarcomponentsincreasesoverthatofthepolarcomponents1Theself2assemblypropertiesofPEO2PPO2PEOtriblockcopolymerinaqueoussolutionsarereviewed1Experimentaltechniquessuchasscatteringtechniques,spectroscopytechniques,viscometer,surfacetension,ultrasonicvelocimetry,diffe
7、rentialscanningcalorimetry,sizeexclusion2010-04-08收到初稿,2010-04-12收到修改稿。Receiveddate:2010-04-08.联系人:刘会洲。第一作者:梁向峰(1977—),男,博士。Correspondingauthor:Prof1LIUHuizhou,hzliu@home1ipe1基金项目:国家自然科学基金重大项目(20490200);国家重ac1cn点基础研究发展计划项目(2007CB613507);国家自然科学基金创Foundationitem:supportedbytheMajorProgr
8、amofN
