Silicone rubber refers to the main chain is alternately composed of silicon and oxygen atoms, silicon atoms are usually connected with two organic groups of rubber. Ordinary silicone rubber is mainly composed of silicone chains containing methyl groups and a small amount of vinyl. The introduction of phenyl group can improve the high and low temperature resistance of silicone rubber, and the introduction of trifluoropropyl and cyanide group can improve the temperature resistance and oil resistance of silicone rubber.

Silica gel, also known as silica gel, is a granular porous silica hydrate, which is an amorphous substance with a transparent or milky white appearance. It is made by washing and drying sodium silicate after adding acid. It is chemically stable and does not burn. It is mainly used as adsorbent in desiccant and column chromatography and thin layer chromatography, and can generally be divided into two categories: organic silica gel and inorganic silica gel.

1. Different nature

Silicone rubber: The main chain du is composed of silicon and oxygen atoms alternately zhi, silicon atoms are usually connected with two organic groups dao rubber.

Silica gel: It is a kind of highly active adsorption material, which is an amorphous substance.

2. Different characteristics

Silicone rubber: silicone rubber has good low temperature resistance, generally can still work at -55℃; The gas permeability of silicone rubber is good, and the oxygen permeability is higher in the synthetic polymer.

Silica gel: Silica gel has strong adsorption capacity, antioxidant capacity and higher stability, such as the harsh environment at -110℃-350℃ operating temperature, and has non-toxic and tasteless, anti-static, fire retardant, high conductivity, super transparent and other excellent characteristics.

3. Different ingredients

Silicone rubber: consists mainly of silicone chains containing methyl groups and a small amount of vinyl. The introduction of phenyl group can improve the high and low temperature resistance of silicone rubber, and the introduction of trifluoropropyl and cyanide group can improve the temperature resistance and oil resistance of silicone rubber.

Silicone: The main component of silicone is silicon dioxide.

4. Different uses

Silica gel: For a variety of silica gel has been widely used in drug purification, DNA separation, food drying, high-precision electronics, cosmetics, sewage purification, beer purification, paint and resin production or preservation.

Silicone rubber: used for bonding, sealing, insulation and potting in electronic, instrument, chemical, light industry and machinery industries; Surface maintenance for equipment management. It has excellent electrical insulation and arc resistance, moisture and shock resistance.