Epoxy (EP) is one of the most commonly used industrial materials with numerous advantages, including superior temperature stability, high adhesive ability and considerable solvent resistance. However, due to the three-dimensional network structure and poor surface characteristics, epoxy can't be used as the wear resistant materials directly. To improve its anti-friction and wear-resistant performance, combined with different fillers then acting as filler reinforced epoxy composites is an important way to solve these problem. In fact, many various fillers can be used to enhance the tribological properties of EP, especially by a combination of fibers, nanoparticles and internal lubricants. It has already demonstrated that particles such as SiO2,TiO2, Al2O3, ZnS, nanoclay, and lubricants such as the MoS2, graphite et al., can significantly decrease the friction coefficient and improve the wear performance as compared to net polymer. From these researches, we notice that although many works have been carried out by filling nanoparticles to the polymer, most of them have not reached their targets because of nanoparticles' aggregation and poor interfacial interaction with the matrix. However, combination of different particles across the length scale range from macro to nano, has proved to be a popular research to improve the mechanical and tribological properties of polymer composites. In particular, modification of polymer reinforced composites through incorporation of harder particles and solid lubricants is highly effective since the properties of the composite materials may be significantly changed by positive synergetic effect of these fillers. In other words, it is worth to consider developing a new kind of epoxy composites containing macro, nano particles and lubricants, to encounter harsh operating conditions in practices.
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