Silica gel is a highly active adsorption material, is an amorphous material, the chemical formula for the mSiO2 · nH2O. Insoluble in water and any solvent, non-toxic and tasteless, stable chemical properties, in addition to alkali, hydrofluoric acid does not react with any substance. Various types of silica gel because of its different manufacturing methods to form a different microporous structure. The chemical composition and physical structure of the silica gel determines that it has many other similar materials difficult to replace the characteristics of high adsorption performance, good thermal stability, chemical stability, high mechanical strength and so on. Silica gel according to the size of its pore size is divided into: macroporous silica gel, coarse silica gel, B type silicone, fine silica gel. Due to the different pore structure, their adsorption properties are characteristic. The silica gel has a higher adsorption capacity in the case of high relative humidity. The silica gel has higher adsorption capacity than the coarse silica gel in the case of relatively low relative humidity, while the B-type silica has a large pore structure Silica gel, the adsorption capacity is also between the coarse, between the pores. Macroporous silica gel is generally used as catalyst carrier, matting agent, toothpaste abrasive and so on. Therefore, different varieties should be selected according to different uses. Silicone adsorption of water, you can use exposure, baking, air drying and other methods of regeneration.
[Safety performance] Silica is the main component of silica, chemical stability, non-toxic. Silicone has a strong ability to absorb, the human skin can produce a dry effect. If the silicone into the eyes, need a lot of water rinse, and as soon as possible to find a doctor. Blue silica gel contains a small amount of cobalt chloride, toxic, should be avoided and food contact and suction mouth, such as the occurrence of poisoning should immediately seek medical treatment. [The main purpose] the use of silica gel with a strong adsorption can quickly and effectively absorb the sealed package of water, chemical stability, non-toxic harmless characteristics; coupled with the recent innovation and development, a variety of silica gel has been used for a large number of drug purification, DNA separation, food drying, high precision electronics, advanced cosmetics, sewage purification, beer purification, advanced coatings and resin production or preservation and so on.
In our daily life and production and business activities, silica gel is often used in the following areas: precision optical instruments, electronic appliances, dry and mildew packaging; leather drying, such as placed in leather, leather bags, shoes, dry and durable The role of food drying, more common in the biscuits and fried foods to ensure that food crisp; drugs dry, put in the bottle to ensure that the drug extended shelf life; container dry: transport containers at different latitudes If you use silica gel desiccant, it can absorb the equivalent of its own weight of water, the ocean transport for up to 50 days in the process, can effectively reduce the dew point and make the container condensate The phenomenon is controlled. Hotel with items such as placed in the closet, shoes and bed, adsorption of various smell, keep the air dry and fresh.