Tribological behavior of epoxy composites containing reactive SiC nanoparticles

Abstract

The present article evaluated the sliding wear behaviors of epoxy and its composites filled with SiC nanoparticles. Polyglycidyl methacrylate (PGMA) and a copolymer of glycidyl methacrylate and styrene were grafted onto the nanoparticles as a measure of surface pretreatment, respectively. The grafted polymers were selected because the epoxide groups on PGMA would take part in the curing reaction of epoxy resin and covalently connect the nanoparticles with the matrix, while styrene acted as a copolymerized monomer to adjust the amount of the reactive groups of the grafted macromolecular chains, and hence the compatibility between the grafted polymers and the matrix. In comparison to the composites filled with untreated nano-SiC particles, the composites with the grafted nano-SiC exhibit improved sliding wear resistance and reduced frictional coefficient owing to the chemical bonding at the filler/matrix interface. The results were analyzed in terms of structure-properties relationship of the composites.

Effect of Silicon Carbide Nanoparticle Additions on Microstructure and Mechanical Behavior of Maleic Anhydride Compatibilized High Density Polyethylene Composites

“…Accordingly, SiC nanoparticles (SiC np ) are attractive fillers for reinforcing polymers and for improving their wear properties [13][14][15][16][17][18]. Very recently, Mahfuz and coworkers studied the effect of SiC np additions on thermal and mechanical properties of epoxy resin [15,16].…”

Effect of nano-Si3N4 surface treatment on the tribological performance of epoxy composite

“…Comparatively, the effect of surface modification based on chemical interaction is more significant, as it provides stronger interaction between modifiers and nanoparticles. In our previous works, graft polymerization onto nanoparticles proved to be feasible in improving tribological behavior of polymer nanocomposites [15][16][17][18][19]. The grafted polymers changed the hydrophilic surface feature of the particles to hydrophobic and broke apart the nanoparticle agglomerates during polymerization process.…”

The recent progress of tribological biomaterials

“…The modified silica nanoparticles have a strong interaction with EP according to entangling of molecular chains and chemical bonding between matrix and modified silica nanoparticles. Epoxy based composites incorporated with Al 2 O 3 nanoparticles [121,122], SiC nanoparticles [123,124] and Si 3 N 4 nanoparticles [125] which are modified by polymers have also been studied and it is evidenced that modified nanoparticles have a positive effect on wear resistance and friction reduction. The tribological behaviors of EP incorporated with surface modified silica nanoparticles and carbon fiber at the same time have been reported and it was shown that it is the synergy effect of nanoparticles and fibers that functions on the improvement of tribological properties of composites [126].…”