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Surfactant Free C02-in-Water Emulsion-templated Poly( vinyl alcohol) Hydrogels and Their Applications in Tissue Engineering  
Surfactant Free C02-in-Water Emulsion-templated Poly( vinyl alcohol) Hydrogels and Their Applications in Tissue Engineering
資料類(lèi)型： PDF文件
關(guān)鍵詞： Poly  (vinyl  alcohol)  hydrogel  Polymerized  high  internal  
phase  emulsions  (polyHIPEs)  Cell  culture  Dense  C02  
資料大?。?/td> 99K
所屬學(xué)科： 分子表征
來(lái)源： 第六屆亞歐研討會(huì)上處理和性能增強(qiáng)聚合物會(huì)議文集（2013.6.2-6 武漢）
簡(jiǎn)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
上傳時(shí)間： 2013-07-04 16:07:12
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