Silicone introduction
Silica gel is a hard, amorphous chain-like and network-like silicic acid polymer particle with a molecular formula of SiO2.nH2O, which is a hydrophilic polar adsorbent. It is an aqueous solution of sodium silicate treated with sulfuric acid to form a gel, which is washed with water to remove sodium sulfate and dried to obtain a glassy silica gel which is mainly used for drying, gas mixture and separation of petroleum components. Industrially used silica gel is divided into two types: coarse pores and fine pores. The coarse pore silica gel can absorb more than 80% of the weight of the adsorbent under the condition of relative humidity saturation, and under low humidity conditions, the adsorption amount is much lower than that of the fine pore silica gel.