Vapor phase silica is a general term for white powder X-ray amorphous silicic acid and silicate products, mainly including precipitated silica, vapor phase silica, ultra-fine silica gel and aerogel, as well as powder synthetic aluminum silicate and calcium silicate. Gas phase silica is an important reinforcing raw material in the rubber industry. Due to its microstructure and aggregate morphology similar to carbon black, and similar reinforcing properties in rubber, it is called gas phase silica. According to their production methods, silica can be divided into two categories: precipitation method gas-phase silica and gas-phase silica. Precipitation method gas-phase method silica is used as a rubber reinforcement raw material, mainly for tires, footwear, and other light colored rubber products.
Gas phase silica (gas phase silica) is one of the extremely important high-tech ultra-fine inorganic new materials. Due to its small particle size, it has a large specific surface area, strong surface adsorption, high surface energy, high chemical purity, good dispersion performance, and special properties in thermal resistance, resistance, and other aspects. With its superior stability, reinforcement, thickening and thixotropy, it has unique characteristics in many disciplines and fields and plays an irreplaceable role. Nano silica, commonly known as "ultra-fine gas-phase silica", is widely used in various industries as an additive, catalyst carrier, petrochemical industry, decolorizing agent, extinction agent, rubber reinforcement agent, plastic filling agent, ink thickener, metal soft polishing agent, insulation and insulation filling agent, advanced daily cosmetics filling and spraying materials, medicine, environmental protection and other fields. And it provides a new material foundation and technological guarantee for the development of related industrial fields.
The strength enhancement effect of gas-phase silica mainly depends on its specific surface area, which generally increases with the increase of specific surface area. All strength indicators of rubber products increase, but the resilience decreases, the tear strength decreases, and it is not wear-resistant. It is difficult to disperse during mixing, has high heat generation, and the Mooney viscosity of the rubber material is high, which is easy to burn. Therefore, different formulations and uses require different specific surface areas, and the influence of specific surface area on the physical and mechanical properties of vulcanized rubber is not consistent.
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