Surfactant Free C02-in-Water Emulsion-templated Poly( vinyl alcohol) Hydrogels and Their Applications in Tissue Engineering，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

Surfactant Free C02-in-Water Emulsion-templated Poly( vinyl alcohol) Hydrogels and Their Applications in Tissue Engineering

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关键词：

Poly (vinyl alcohol) hydrogel Polymerized high internal
phase emulsions (polyHIPEs) Cell culture Dense C02

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99K

所属学科：

分子表征

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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：

Polymerizedhighinternalphaseemulsions(polyHIPEs),withahighlyporousandinterconnectedmorphology,arematerialspreparedbypolymerizingthecontinuousphaseofanHIPE.AndthecavitysizeofpolyHIPEsiseasilytunablebyvariousmeans[l].Unfortunately,alargeamountoforganicsolventsareusedinthetraditionalHIPE.TheseproblemscanbeovercamebytemplatingsupercriticalC02-in-water(C/W)emulsions.However,C02isfeeblesolventandmostofpolymersandpolarmassesaredifficulttodissolve;effectivesurfactantsplayanimportantroleintheformationofC/Wemulsions.Thesurfactantsareusuallynon-degradableanddifficulttoberemovedfromthemonolithsc2].WefoundthatpartiallyhydrolyzedPVAsolutionscanformemulsionswithdenseC02atlowertemperature.ThereasonisthatthepartiallyhydrolyzedPVAisacopolymerofpoly(vinylacetate)andpoly(vinylalcohol),whichissimilartoblockcopolymercharacteristics,andPVAsolutionhashigherviscosity,whichincreasesthestabilityofemulsion.Inthisstudy,highlyporouscross-linkedpoly(vinylalcohol)hydrogelmaterialswerepreparedbysurfactantfreetemplatingconcentratedC/Wemulsionsatcoolingtemperature.PVAmonolithsmaterials,whichconformcloselytotheinteriorofthereactionvessel,wereobtained.Theaverageporesize(10一20ym)ofthemonolithsmaterialswasdeterminedbyscanningelectronmicroscope(SEM).AndthePVAhydrogelswereusedastissueengineeringscaffolds,onwhichhumanfibroblastcellscangrowwell.

作者：

W. Luo, S. C. Zhang, L. Y. Liang, B. E. Tan

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2013-07-04 16:07:12

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