Synergistic Toughening of Epoxy with Carbon Nanotube and Graphene Oxide for Improved Long-term Performance，第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）-中国聚合物网,论文下载

Synergistic Toughening of Epoxy with Carbon Nanotube and Graphene Oxide for Improved Long-term Performance

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carbon nanotube graphene oxide epoxy fatigue creep

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分子表征

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第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）

简介：

Recently,graphene,atwo-dimensional,one-atom-thickmaterial,hastriggeredtremendousresearchinterest.MuchlikeCNTs,excellentelectrical,thermal,andmechanicalpropertieshavebeendemonstratedforgraphene.Withtheseintrinsicproperties,togetherwithitsexcellentflexibilityandlargeinterfacialareainexfoliatedform,graphenemayalsoserveasfillerforenhancingthemechanicalandelectricalpropertiesofcomposites.Grapheneoxide(GO),whichisoftensimplyassumedtobeagraphenesheetdecoratedwithoxygenintheformofcarboxyl,hydroxyl,and/orepoxygroups,ishydrophilicandreadilydisperseinwatertoformstablecolloidalsuspension.Moreinterestingly,itissuggestedbyrecentresearchthatGOcanbeusedtodisperseCNTsinaqueousmediaorpolymermatrix.ItisalsorevealedthatacombinationofCNTsandGOhasasynergeticeffectonthemechanicalpropertiesofpoly(vinylalcohol)(PVA)matrix.ThecombinationofthenanofillersnotonlyresultsinimprovedtensilestrengthandYoung‘smodulus,butalsoinenhancedtoughnessofthePVAnanocomposites.ComparingtothermoplasticpolymerssuchasPVA,however,itisrelativelymoredifficulttoachievesignificantmechanicalimprovementsforthermosetssuchasepoxy.WepresentastudyonpreparationofCNT-GO/epoxycompositesbyincorporatingGOdispersedCNTsintoanepoxyresin.TheeffectofGOonthedispersionofCNTsinepoxymatrix,andthetensilebehaviorofepoxycompositeswerestudied.OpticalandscanningmicroscopyresultsindicatethatCNTsagglomerationintheepoxywassignificantlyreducedbyaddingGOsheets,andremarkablesynergeticeffectbetweenCNTsandGOsheetsinimprovingthetensilepropertiesofepoxyresinisdemonstrated.Moreover,sincedynamicfatigueandstaticfatigue(creep)aretwoprimarymodesoffailureinload-bearingstructuralmaterials,theywerealsostudiedforCNT-GO/epoxycomposites.Comparedtoneatepoxymatrix,thefatigueandcreeprupturelifeofCNT-GO/epoxycompositesshowedremarkableimprovement.

作者：

Y. Q. Li, R. Umer, K. Liao

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2013-06-21 16:00:16

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