Silicone gel is a kind of organosilicon compound, which refers to a compound that contains Si-C bonds and at least one organic group is directly linked to silicon atoms. Among them, polysiloxane composed of silicon-oxygen bond (-Si-O-Si-) as the skeleton is the most numerous, deepest and most widely used class of organosilicon compounds, accounting for more than 90% of the total use.

Inorganic silica gel is a highly active adsorption material, which is usually prepared by reacting sodium silicate and sulfuric acid, and through a series of post-treatment processes such as aging and acid foaming. Silica gel is an amorphous substance, and its chemical formula is MSiO2.nH2O. Insoluble in water and any solvent, non-toxic and tasteless, chemically stable, does not react with any substance except strong alkali and hydrofluoric acid. Various types of silica gel form different microporous structures due to their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics that are difficult to be replaced by other similar materials: high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength, etc., and is used as a desiccant, humidity regulator, deodorant, etc. It is used in industry as an oil hydrocarbon decolorizer, catalyst carrier, pressure swing adsorbent, etc.; Separation and purifier for fine chemicals, beer stabilizer, coating thickener, toothpaste friction agent, matting agent, etc.