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明胶纳米复合薄膜的制备及性能研究的中期报告.docx

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明胶纳米复合薄膜的制备及性能研究的中期报告 本处只能提供英文的中期报告样例： MidtermReportonPreparationandPropertiesStudyofGelatinNanocompositeFilms Introduction: Gelatin-basedfilmshavereceivedincreasingattentionduetotheirbiodegradability,renewability,andgoodmechanicalproperties.However,thelowthermalandwaterresistanceofpuregelatinfilmslimitstheirpotentialapplications,especiallyinthefoodandpackagingindustries.Inrecentyears,nanocompositeshavebeendevelopedasapromisingapproachtoovercomethesedrawbacks.Theadditionofnanoparticlescanimprovethemechanical,thermalandbarrierpropertiesofpolymerfilms.Inthisproject,weaimtopreparebiodegradablegelatin-basednanocompositefilmsbyincorporatingnanoparticles,includingmontmorillonite(MMT)andsilvernanoparticles(AgNPs),andstudytheirproperties. Materialsandmethods: GelatinwasobtainedfrombovineskinandMMTwaspurchasedfromSigma-Aldrich.AgNPsweresynthesizedusingachemicalreductionmethod.Threetypesoffilmswereprepared:puregelatinfilm,gelatin/MMTcompositefilm,andgelatin/AgNPcompositefilm.Thecompositefilmswerepreparedbyasolutioncastingmethod.Variousproperties,includingmechanical,thermalandbarrierproperties,weremeasured. Resultsanddiscussion: TheresultsshowedthattheadditionofMMTandAgNPsimprovedthemechanicalpropertiesofthegelatinfilms.Forexample,thetensilestrengthofthegelatin/MMTcompositefilmincreasedby56%comparedtothepuregelatinfilm.Thethermalstabilityofthenanocompositefilmswasenhancedaswell,asevidencedbytheincreaseintheonsetdecompositiontemperature.ThebarrierpropertiesofthefilmsimprovedaswellduetotheincorporationofMMTandAgNPs,whichreducedthepermeabilityofwaterandoxygen.Thefilmtransparencywasalsoimproved,whichisanimportantfactorforpackagingapplications. Conclusion: Inconclusion,gelatin-basednanocompositefilmswithimprovedmechanical,thermalandbarrierpropertiesweresuccessfullypreparedbyincorporatingMMTandAgNPs.Thesefilmshavepotentialapplicationsinvariousareas,suchasfoodpackagingandbiomedicalmaterials.Furtheroptimizationofthepreparationmethodandcharacterizationofthefilmswillbeperformedinthefoll