The characteristics of silica gel safety performance and use

feature
Silica gel is a kind of highly active adsorption material, belongs to the amorphous substance, its chemical formula is mSiO2• nH2O. Insoluble in water and any solvent, non-toxic and tasteless, chemically stable, in addition to strong alkali, hydrofluoric acid does not react with any substance. Various types of silica gel form different micropore structures due to their different manufacturing methods. The chemical composition and physical structure of silica gel determines that it has the characteristics that many other similar materials are difficult to replace: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength.
Silica gel according to the size of its pore size is divided into: large pore silica gel, coarse pore silica gel, B type silica gel, fine pore silica gel. Because of the different pore structures, their adsorption properties have their own characteristics. Coarse-porous silica gel has a higher adsorption capacity in the case of high relative humidity, and the adsorption capacity of fine-porous silica gel is higher than that of coarse-porous silica gel in the case of low relative humidity, and the adsorption capacity of B-type silica gel is also between coarse and fine-porous silica gel due to the pore structure. 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.
After absorbing water, silica gel can be regenerated by exposure, baking, air drying and other methods.
[Safety performance]
The main component of silica gel is silica, which is chemically stable and non-toxic.
Silica gel has a strong adsorption capacity and can produce a drying effect on human skin. If silicone enters the eye, wash with plenty of water and seek medical treatment as soon as possible.
Blue silica gel because it contains a small amount of cobalt chloride, toxic, should avoid contact with food and inhalation of mouth, such as poisoning should immediately seek medical treatment.
[Main use]
The use of silica gel has the characteristics of strong adsorption can quickly and effectively absorb the moisture in the sealed package, chemical stability, non-toxic and harmless; In addition to the continuous innovation and development in recent years, various silica gel has been widely used in drug purification, DNA separation, food drying, high-precision electronics, advanced cosmetics, sewage purification, beer purification, advanced coatings and resin production or preservation. In our daily life and production and business activities, silicone is often used in the following aspects:
Dry mildew proof packaging for precision optical instruments and electronic appliances;
Leather goods drying, such as placed in leather clothing, leather bags, shoes to play a drying and quality preservation role;
In terms of food drying, it is often used in biscuits and fried foods to ensure that the food is crunchy;
In terms of drying drugs, put them in medicine bottles to ensure that the shelf life of drugs is extended;
Container drying: Shipping containers at different latitudes will form the "rain" in the box, if you use silica gel desiccant, it can absorb the equivalent of its own weight of water, ocean transportation for up to 50 days in the process, can effectively reduce the dew point and the condensation of the container is controlled.
Hotel items, such as placed in the closet, shoes and under the bed, absorb various odors, keep the air dry and fresh.