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Small Amount of Functionalized Nanosilica with Dramatic Enhanced Fracture Toughness of Epoxy Matrix for Large-scale Applications  
Small Amount of Functionalized Nanosilica with Dramatic Enhanced Fracture Toughness of Epoxy Matrix for Large-scale Applications
資料類(lèi)型: PDF文件
關(guān)鍵詞: Functionalised  nanosilica  Particle-reinforcement  Fracture  toughness  
資料大?。?/td> 109K
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:
Aswidelyusedthermosettingpolymers,epoxyresinshaveseveraluniquecharacteristics,highadhesivestrength,highstrengthandhardness,excellentchemicalandheatresistance.Epoxieshavebeenwidelyusedinvariousindustrialapplications,particularlyasadhesivesforbondingandasmatrixresinsforproducinghigh-performancefibrereinforcedcomposites.However,mostcuredepoxysystemsshowlowfracturetoughness,poorresistancetocrackinitiationandpropagation,andinferiorimpactstrength.Researchshowsnano-particlessuchasnanosilica,halloysite,nanoclay,andnanotubecanreinforcefracturetoughnessoftheepoxy.Whennano-particlesareusedasmodifiersinepoxies,ahomogeneousdispersionisrequiredinordertoachievethenano-phasestructure.Astheparticlestendtoagglomerate,specialtechniqueshavehadtobedevelopedandusedtoachieveahomogeneousparticledistribution,includingphysicalandchemicalmethods.Inthisstudy,weexperimentallyreportthesimplemethodtoenhancedfracturetoughnessofepoxycompositesbyusingasmallamountofcommercialisedfunctionalnanosilicabymechanicalmixing.Nanosilicaswithaminoandepoxidefunctionalgroupsshowstronginterfacesinepoxycompositestosuppressaggregationandenhanceresin-wettability,furtherenhancedfracturetoughnessofepoxycomposites.Comparedwithpreviousresearch,toachievethesameKICvaluesorsimilarenhancementratio,smallamountofnanosilicacontentisneeded.Duetocommercialavailabilityandcheappriceofrawmaterialandsimplefabricationmethod,thosesystemshavethescale-uppotential.
作者: W. Han ,J. C. Zhao , C. B. Zhao, Y. H. Tang
上傳時(shí)間: 2013-07-04 16:38:49
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