Fumed silica is an important inorganic non-metallic material. It is integrated with silicone compounds, silicone oil and other raw material to obtain silicone rubber. It has excellent physical and chemical properties and is widely used in our life. In areas that are in long-term contact with the human body and skin, fumed silica plays an important role in silicone rubber products.
1. Improve the stability of silicone rubber. As an excellent reinforcing agent, fumed silica can increase the hardness of silicone rubber. The particle size of fumed silica is extremely small, with an average particle size of about 7 nanometers. This particle size distribution allows the fumed silica to be better dispersed in the silicone rubber compounds. Adding an appropriate amount of fumed silica to silicone rubber can improve the material properties of silicone rubber while maintaining good elasticity.
2. Enhance the wear resistance of silicone rubber. Fumed silica has excellent wear resistance and can effectively improve the wear resistance of silicone rubber. This is because after adding fumed silica, the fumed silica particles can form a good interface combination with the silicone rubber matrix, thereby improving the wear resistance of the silicone rubber and the fineness of the silicon molecules. In addition, fumed silica can also modify the surface of silicone rubber to improve its wear resistance.
3. Improve the thermal stability of silicone rubber. Fumed silica has high thermal stability and can effectively improve the thermal stability of silicone rubber. At high temperatures, it is not prone to reactions such as decomposition or sintering, so the stability of silicone products in high-temperature can be ensured. In addition, it can also improve the weather resistance and chemical corrosion resistance of silicone rubber, further expand the application scope of silicone rubber, and can be used in special industries.
4. Improve the electrical properties of silicone materials. It can improve the electrical properties of silicone rubber. After adding fumed silica, it can reduce its volume resistivity and dielectric constant, and improve Its insulation properties and arc resistance. This is important in the manufacture of products such as wires and cables, electronic components and insulation materials.
