(174a) Preparation and Characterization of 3D Network Polymer-Based Nanocomposites Reinforced By Carbon Nanofiber

The rapid developments of petrochemical industry, aerospace and automobile industry require supports and promotion of special wear-resistant materials based on high strength, easy manufacturability and outstanding dimensional stability. Three-dimensional network polymer-based nanocomposite is a promising material to achieve unique properties including high wear resistance. However, only few publications are available to research wear-proof materials by taking advantage of 3D network structure.

In this paper, we designed 3D network polymer-based nanocomposites with outstanding properties. Combined with comprehensive property of high strength, high modulus and superior lubrication of carbon nanofiber (CNF) and structural supports provided by three-dimensional polyimide (PI) fibers felt, the carbon nanofiber and three-dimensional polyimide fibers reinforced epoxy resins(EP) nanocomposites (CNF/PI/EP) were designed and fabricated. The tribological properties of pure epoxy, PI/EP and CNF/PI/EP composites under dry sliding condition were investigated. Results indicated that when the applied load was 1.2 MPa, the lowest wear rate of the CNF/PI/EP nanocomposites reached 5.605×10^-14m³/Nm, which was respectively 18 times and 2 times higher than that of pure EP and PI/EP 3D composites, showing remarkable wear resistance. Moverover, CNF/PI/EP nanocomposites shown improved mechanical and electrical properties. This research provided a new opportunity for the design and develpoment of mulfunctional wear-resistance 3D materials.