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

資料類型：

PDF文件

關(guān)鍵詞：

Graphene oxide Nanocomposites Hydrogen-bonding Strength Toughnes

資料大小：

73K

所屬學(xué)科：

分子表征

來(lái)源：

第六屆亞歐研討會(huì)上處理和性能增強(qiáng)聚合物會(huì)議文集（2013.6.2-6 武漢）

簡(jiǎn)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

上傳時(shí)間：

2013-06-27 13:32:28

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