PEO_PPO_PEO嵌段共聚物在水溶液中的自組裝行為及其應(yīng)用

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1、第61卷第7期化工學(xué)報(bào)Vol161No172010年7月CIESCJournalJuly2010綜述與專論P(yáng)EO2PPO2PEO嵌段共聚物在水溶液中的自組裝行為及其應(yīng)用梁向峰,郭晨,劉慶芬,劉會洲(中國科學(xué)院過程工程研究所,中國科學(xué)院綠色過程與工程重點(diǎn)實(shí)驗(yàn)室,北京100190)摘要:聚氧乙烯2聚氧丙烯2聚氧乙烯(PEO2PPO2PEO)嵌段共聚物是一類重要的非離子表面活性劑,在選擇性溶劑中可以自組裝成多種形貌的介觀結(jié)構(gòu)。對PEO2PPO2PEO嵌段共聚物在水溶液中自組裝行為進(jìn)行了綜述,介紹了其自組裝行為的實(shí)驗(yàn)研究技術(shù);闡明了嵌段共聚物構(gòu)型、分子量、溫度、濃度、添加

2、劑等因素對PEO2PPO2PEO嵌段共聚物聚集行為的調(diào)控和作用機(jī)理;介紹了嵌段共聚物自組裝特性的熱力學(xué)模型、分子模擬及計(jì)算機(jī)預(yù)報(bào)等研究方法和研究進(jìn)展;重點(diǎn)介紹了PEO2PPO2PEO嵌段共聚物在介孔材料制備、藥物載體、生物大分子分離、嵌段共聚物修飾等方面的應(yīng)用。關(guān)鍵詞:嵌段共聚物;臨界膠團(tuán)溫度;臨界膠團(tuán)濃度;自組裝行為;調(diào)控;應(yīng)用中圖分類號:O648文獻(xiàn)標(biāo)識碼:A文章編號: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.聯(lián)系人:劉會洲。第一作者:梁向峰(1977—),男,博士。Correspondingauthor:Prof1LIUHuizhou,hzliu@home1ipe1基金項(xiàng)目:國家自然科學(xué)基金重大項(xiàng)目(20490200);國家重ac1cn點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(2007CB613507);國家自然科學(xué)基金創(chuàng)Foundationitem:supportedbytheMajorProgr

8、amofN