Synthesis of Poly (vinyl acetate) Based Amphiphilic Surfactant by RAFT/ATRP Polymerization and Preparation Macroporous Materials by Emulsion-templating Polymerization，第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）-中国聚合物网,论文下载

Synthesis of Poly (vinyl acetate) Based Amphiphilic Surfactant by RAFT/ATRP Polymerization and Preparation Macroporous Materials by Emulsion-templating Polymerization

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关键词：

Amphiphilic block copolymers RAFT/ATRP C02 -in-water emulsion

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104K

所属学科：

分子表征

来源：

第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）

简介：

Supercriticalcarbondioxide(scC02)isanattractivealternativetoconventionalsolventscl].However,scC02issofeeblethatmostofpolymersandpolarmassesaredifficulttodissolveinit,whichlimitsitsapplications.Thisproblemcanbeovercamebypreparingemulsionormicroemulsionbyusingamphiphilicsurfanctants.Althoughfluoro-orsilicone-basedsurfactantsshowgoodperformanceinscC02,thehighcostisprohibitiveonanindustrialscaleapplication.Recently,thereisanincreasingdrivetodiscoverC02-philichydrocarbonmaterialswithlow-cost,suchaspoly(vinylacetate)(PVAc),etal,whichcanbealsopreparedstabilisers,amphiphilicsurfactants.[2]Mostofhydrocarbon-basedsurfanctantsreportedintheliteraturesfocusonnon-ionicsurfactants,andthereisfewreportsaboutionicsurfactant.[3]Inthisstudy,anewionicsurfactantpoly(vinylacetate)-b-poly(dimethylaminoethylmethacrylate)(PVAc-b-PDMEMA)wassynthesizedbyacombinationofRAFTandATRPmethodsbyusingabromoxanthateiniferteraschaintransferagent(CTA).ThehydrophilicabilityofPVAc-b-PDMAEMAcopolymerscanbetunedbycontrollingthemolecularchainlength,orpHvalueofthesolution.ItisfoundthatPVAc-trPDMAEMAcopolymersareeffectivesurfactantsforC02-in-wateremulsionswithhighstability.Polymerizationofemulsion-templatingformedbyacrylamide(AM)solution/C02system,PAMmonolithsmaterialswhichconformcloselytotheinteriorofthereactionvesselareobtained.TheaverageporesizeofthemonolithsmaterialswhichiscalculatedbySEManalysisrangesfrom10-25ym.

作者：

S. C. Zhang, W. Luo, B. E. Tan

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2013-07-04 16:03:18

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