The Effects of Alumina Nanofillers on Mechanical PropertiesofHigh-PerformanceEpoxyResin
作者：Hui Zhang, Hui Zhang, Longcheng Tang, Gang Liu, Daijun Zhang, Lingyun Zhou, and Zhong Zhang*
關(guān)鍵字：Nanocomposites,Epoxy,Nano-Alumina,MechanicalProperties,Toughness
論文來源：期刊
具體來源：Journal of Nanoscience and Nanotechnology
發(fā)表時間：2010年
In the past decade extensive studies have been focused on mechanical properties of inorganic
nanofiller/epoxy matrices. In this work we systematically investigated the mechanical properties of
nano-alumina-filledE-54/4,4-diaminodiphenylsulphone(DDS)epoxyresins,whichwereprepared
via combining high-speed mixing with three-roll milling. Homogeneous dispersion of nano-alumina
withsmallagglomerateswasobtainedinepoxyresin,whichwasconfirmedusingtransmission
electronmicroscopy(TEM).Thestatic/dynamicmodulus,tensilestrengthandfracturetoughness
of the nanocomposites were found to be simultaneously enhanced with addition of nano-alumina
fillers. About 50% and 80% increases of KIC and GIC were achieved in nanocomposite filled with
18.4wt%aluminananofillers,ascomparedtothatoftheunfilledepoxyresin.Furthermore,the
corresponding fracture surfaces of tensile and compact tension samples were examined by scanning
electron microscopy (SEM) and atomic force microscopy (AFM) techniques in order to identify the
relevant fracture mechanisms involved. Various fracture features including cavities/debonding of nanofiller,localplasticdeformationaswellascrackpinning/deflectionwerefoundtobeoperative
in the presence of nano-alumina fillers.