Resin-based composites have the characteristics of light weight, high strength, and corrosion resistance. However, in recent years, the material industry and the pillar industries of the national economy have increasingly demanded the performance of resin-based materials. How to synthesize high-performance resin-based composites has become Important topics in the materials and business world. The advent of fumed silica provides new opportunities for the synthesis of resin-based composite materials and a new way for the modification of traditional resin-based materials, as long as the fumed silica particles can be fully and uniformly dispersed in the resin. Among the materials, the purpose of comprehensively improving the properties of resin-based materials can be achieved.

1. Improve strength and elongation. Epoxy resin is the basic resin material. Adding fumed silica to epoxy resin is completely different in structure from epoxy-based composite materials with coarse-grained silica (silica, etc.), coarse-grained SiO2. Generally added as a reinforcing agent, it is mainly distributed in the chain of polymer materials, and fumed silica has a very strong surface due to the serious lack of coordination on the surface, the large specific surface area, and the surface lack of oxygen, which makes it extremely strong. Reactivity, it is easy to bond with the oxygen of the epoxy ring molecule, which improves the bonding force between molecules. Some fumed silica particles are still distributed in the gaps of the polymer chain, and are in phase with the coarse-grained SiO₂ particles. In comparison, it exhibits very high flow ripple properties, so that the strength, toughness, and ductility of epoxy resin materials added with fumed silica are greatly improved.

2. Improve abrasion resistance and improve the surface finish of the material. Fumed silica particles are 100-1000 times smaller than SiO2. Adding them to epoxy resin is good for drawing filaments. Due to the high fluidity and small size effect of fumed silica, the surface of the material is more dense and clean, the friction coefficient becomes smaller, and the high strength of the nanoparticles makes the material's wear resistance greatly enhanced.

3. Anti-aging performance. A fatal weakness in the use of epoxy resin-based composites is their poor anti-aging performance. The main reason is that the medium- and long-wave effects of ultraviolet radiation in the 280-400nm wavelength range of solar radiation, and its damage to resin-based composites is very serious Degradation of polymer chains causes rapid degradation of resin-based composites. Fumed silica can strongly reflect ultraviolet rays. Adding it to epoxy resin can greatly reduce the degradation effect of ultraviolet rays on epoxy resin, so as to delay the aging of materials.