Introduction of precipitated silica

Precipitated silica products are commonly known as silica, also known as hydrated silicic acid and light silica. The chemical expression is usually written as msio2 · nH2O. The appearance of precipitated silica is white and highly dispersed amorphous powder, and some products are processed into granules as commodities. The specific gravity is 2.319-2.653, and the melting point is 1750 ℃. It is insoluble in water and most acids. After absorbing water in the air, it will become a fine aggregate, soluble in caustic soda and hydrofluoric acid. It is stable to other chemicals, resistant to high temperature, does not decompose, does not burn. It has high electrical insulation, porosity, large internal surface area, water absorption and non-toxic.

Precipitated silica products have the following characteristics: adhesion, anti adhesion, anti caking, condensation, controlled release, carrier, flow aid, improving printing effect, mechanical action, thermoplastic special additives, reinforcement, rheological control, whitening. The hydrophobic silica treated by surface modification is easily soluble in oil and can be used as reinforcing filler for rubber and plastics, which can significantly improve the mechanical strength and tear resistance of the products. Due to different manufacturing methods, the physicochemical properties and microstructure of silica are different, so its application fields and application effects are also different. The hydrophobic silica treated by surface modification is easily soluble in oil and can be used as reinforcing filler for rubber and plastics, which can significantly improve the mechanical strength and tear resistance of the products. Due to different manufacturing methods, the physicochemical properties and microstructure of silica are different, so its application fields and application effects are also different.