Influence of GO Loaded Nano-Al₂O₃ on the Wear Resistance of Epoxy Resin

Abstract

For developing an epoxy resin-based nanocomposite with excellent wear resistance, the spherical nano-alumina was modified by γ-aminopropyltrimethoxysilane and loaded on the surface of graphene oxide, and then it was added as a filler to epoxy resin to prepare a spherical nano-alumina/graphene oxide/epoxy resin novel nanocomposite material.Moreover, the hardness, wear amount, bending and impact properties of the nanocomposite materials were tested by the means of hardness tester, abrasion tester and universal testing machine.Results showed that in the comparison of pure epoxy resin, the new nanocomposite material had 52.5% reduction in wear amount.The bending strength of this nanocomposite material reached 121.4 MPa, which was 1.44 times that of pure epoxy resin; the impact strength reached 27.4 J/m2, which was 5.96 times that of pure epoxy resin.Furthermore, the large specific surface area and surface force of the spherical nano-alumina enhanced the surface action of the sheet-shaped graphene oxide and epoxy resin, and thereby enabled the new nanocomposite material to exhibit excellent wear resistance.

Keywords

• epoxy resin; spherical nano-alumina; graphene oxide; wear resistance