GRAFTING OF HYDROPHILIC MONOMERS ONTO POLYURETHANE MEMBRANES BY SOLUTION OR PRE-ABSORBING METHODS FOR ACCELERATION OF CELL COMPATIBILITY-中国期刊网

摘要 Twograftingmethods,i.e.solutiongraftingandpre-adsorbing,areintroducedtocovalentlyimmobilizehydrophilicpolymersonsegmentedpolyurethane(SPU)tomodifyitshydrophilicityandtoimproveitscellcompatibility.Solutiongraftingresultsinhigherdegreeofgraftingandroughersurfacemorphology.Cellcultureevaluationdemonstratesthatthemodifiedmembranesthusobtainedaredisadvantageoustotheendothelialcell(ECs)growthprobablybecausethehydrophilicgroupsonthesurfaceareover-crowded.However,pre-absorbinggraftinggenerateslowerdegreeofgrafting,whichisdetectedandconfirmedbyATR-FTIRspectraandwatercontactangle.Scanningelectronmicroscopic(SEM)measurementshowsthatthelattermethodproducesaplaneandsmoothmorphology,whichissimilartotheSPUcontrolsamplecontrolled.Whengraftingwithlowermonomerconcentration,ECscouldgrowonSPU-g-PHEA[poly(2-hydroxyethylacrylate)],SPU-g-PAAm(polyacrylamide),SPU-g-PDMA[poly(2-(dimethylamino)ethylmethacrylate)]orquaternizedSPU-g-PDMAsurfacewithelongatedcellshapes.Hence,thecellcompatibilityofSPUisimprovedandausefulmethodtoconstructacellcompatiblelayeronthepolymersurfacehasbeendeveloped.``

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GRAFTING OF HYDROPHILIC MONOMERS ONTO POLYURETHANE MEMBRANES BY SOLUTION OR PRE-ABSORBING METHODS FOR ACCELERATION OF CELL COMPATIBILITY

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GRAFTING OF HYDROPHILIC MONOMERS ONTO POLYURETHANE MEMBRANES BY SOLUTION OR PRE-ABSORBING METHODS FOR ACCELERATION OF CELL COMPATIBILITY

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