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羟基硅油改性水性聚氨酯的制备与性能研究.docx

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羟基硅油改性水性聚氨酯的制备与性能研究 Title:PreparationandCharacterizationofHydroxyl-terminatedSiliconeOilModifiedWaterbornePolyurethane:AStudyonitsPerformance Abstract: Waterbornepolyurethane(WPU)coatingshavegainedattentionduetotheirenvironmentalsustainabilityandexcellentperformance.Inrecentyears,themodificationofWPUusinghydroxyl-terminatedsiliconeoilshasemergedasapromisingapproachtoenhanceitsproperties.Thispaperaimstoexplorethepreparationandperformanceofhydroxyl-terminatedsiliconeoilmodifiedwaterbornepolyurethane(HTS-WPU)coatings.Thestudyinvestigatesthesynthesisprocess,morphology,thermalstability,mechanicalproperties,andwaterresistanceofHTS-WPUcoatings.Theresultsindicatethattheincorporationofhydroxyl-terminatedsiliconeoilsignificantlyimprovestheperformanceofWPUcoatings,makingthemsuitableforvariousapplications. 1.Introduction Waterbornepolyurethane(WPU)coatingshavegainedincreasingpopularityduetotheirlowvolatility,lowenvironmentalimpact,andexcellentmechanicalproperties.However,WPUcoatingsoftenlackcertainproperties,suchashydrophobicityandweatherresistance.Toaddresstheseissues,variousapproacheshavebeenproposed,includingthemodificationofWPUwithhydroxyl-terminatedsiliconeoils.ThismodificationnotonlyenhancestheperformanceofWPUcoatingsbutalsomaintainstheireco-friendlycharacteristics. 2.Methodology ThesynthesisofHTS-WPUcoatingsinvolvesatwo-stepprocess:thepreparationofpolyolandthesynthesisofpolyurethane.Thepolyolisobtainedbyreactingpolyethyleneglycol,dimethylolpropionicacid,andhydroxyl-terminatedsiliconeoil.Thepolyurethaneisthensynthesizedbyreactingtheobtainedpolyolwithisocyanate.Theparameterssuchastheratioofreactants,reactiontemperature,andreactiontimeareoptimizedtoobtaindesirableHTS-WPUcoatings. 3.MorphologyAnalysis ThemorphologyoftheHTS-WPUcoatingsisevaluatedusingscanningelectronmicroscopy(SEM)andatomicforcemicroscopy(AFM).TheSEMimagesrevealawell-dispersedanduniformdistributionofhydroxyl-terminatedsiliconeoilwithintheWPUmatrix.TheAFManalysisfurtherconfirmsthepresenceofasmoothandcontinuous