聚合物氧化石墨烯纳米复合水凝胶的制备与性能研究的中期报告Abstract:Thismidtermreportisfocusedonthepreparationandpropertiesofpolymer-graphenenanocompositehydrogels.ThesynthesisofthehydrogelswascarriedoutbyincorporatinggrapheneoxideintothepolymermatrixthroughasupercriticalCO2-assistedprocess.Themorphology,mechanicalandelectricalpropertiesofthehydrogelswerecharacterizedusingdifferenttechniques,includingSEM,AFM,DMA,DSC,andelectricalconductivitymeasurements.Theresultsrevealedthattheadditionofgrapheneoxidesignificantlyimprovedthemechanicalpropertiesofthepolymerhydrogels,includingtheirstiffness,toughness,andtearresistance.Theelectricalconductivityofthenanocompositehydrogelsalsoshowedasignificantimprovement,whichwasattributedtothehighaspectratioandhighsurfaceareaofthegrapheneoxideparticles.Introduction:Hydrogelshaveattractedsignificantattentioninrecentyearsduetotheiruniqueproperties,includinghighwaterabsorptioncapacity,softnessandbiocompatibility.Theyhavebeenwidelyusedinvariousapplications,includingdrugdelivery,tissueengineering,andassensors.However,hydrogelstypicallyexhibitpoormechanicalproperties,whichrestricttheirpracticalapplications.Toovercometheselimitations,differentapproacheshavebeendevelopedtoenhancethemechanicalpropertiesofhydrogels,suchasincorporatingnanoparticles,fibers,andcrosslinkingagents.Amongtheseapproaches,theincorporationofgraphene-basedmaterialshasemergedasapromisingapproachduetotheirexceptionalmechanical,electricalandthermalproperties.Inthisstudy,weaimtodeveloppolymer-graphenenanocompositehydrogelswithenhancedmechanicalandelectricalpropertiesbyincorporatinggrapheneoxideintothepolymermatrixusingasupercriticalCO2-assistedprocess.Thehydrogelswerepreparedusingpolyvinylalcohol(PVA)asthepolymermatrixandgrapheneoxideasthereinforcingagent.Themorphology,mechanicalandelectricalpropertiesofthehydrogelswerecharacterizedusingdifferenttechniques,includingSEM,AFM,DMA,DSC,andelectricalconductivitymeasurements.MaterialsandMethods:Polyvinylalcohol(PVA)(Mw=125,000)andgrapheneoxide(GO)werepurcha