High Mechanical Performance of Layered Graphene Oxide/Poly( vinyl alcohol) Nanocomposite Films，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

High Mechanical Performance of Layered Graphene Oxide/Poly( vinyl alcohol) Nanocomposite Films

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Graphene oxide Nanocomposites Hydrogen-bonding Strength Toughnes

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所属学科：

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：

Thedesignandfabricationofstrong,lightweight,anddamage-resistantcompositematerialsaremajortopicsofstudiesoncomposite.Biomimetics,adevelopingmultidisciplinaryfield,isnowleadingthefabricationofnovelmaterialswithremarkablemechanicalproperties.Grapheneoxide(GO),agraphenederivate,possessesgoodmechanicalproperty,highaspectratio,andgoodsolubilityinaqueoussolution,indicatinggreatpotentialinnanocompositefields.Inthiswork,bio-inspiredlayeredGO/pol(vinylalcohol)(PVA)nanocompositefilmswithremarkablemechanicalperformancewerepreparedbyanenvironmentalfriendly,bottom-upassemblymethodology.ThestructuralanalysisshowsthealternatepileofinorganicGOplateletsandorganicPVAbinder.Tensiletestsindicatethattheborate-treatedGO/PVAnanocompositefilmsdisplay360MPaofstrength,whichistwofoldtothreefoldhigherthanthatofbiologicalmaterials(e.g.,nacre).ToughnessofGO/PVAnanocompositesisalsoenhancedtofourfoldcomparedwithnacre.Torevealthetougheningfunctionoftheintercalatedpolymerinthenanocomposites,theinfluenceofpolymerwithvariedmolecularweights(Mw‘s)onthefracturemodeofthenanocompositeswassystematicallyinvestigatedthroughquasi-statictensileandcreeptests.ThePVAmoleculeswithhighMwcanconnectmoreneighboringGOplateletsthroughinter-andintra-linkagesthanthosewithlowerMw,whichresultinginefficientstresstransferalongtheGOplanedirection.Thus,tensilestrengthandtoughnessimproved.Thisworkillustratesthefunctionsofbondingtypesbetweeninorganic-organicphasesandintercalatedpolymerwithdifferentMw,sonthemechanicalpropertiesofthelayerednanocomposites,includingstiffness,strength,andtoughness.

作者：

L. Q. Liu, Y. Gao, Q. Liu, J. Kuang, D. Zhou, B. H. Han, Z. Zhang

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2013-06-27 13:32:28

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