ASIASEAL New Material Technology (Shandong)
Dongguan ASIASEAL New Material Technology
Dongguan ASIASEAL New Material Technology
Chain to Shandong
Yahai website
Chain to Shandong
Yahai website
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Generally speaking, silica gel can be divided into two categories: organic silica gel and inorganic silica gel according to its properties and components. Inorganic silica gel is a highly active adsorption material, usually prepared by reacting sodium silicate and sulfuric acid, and undergoing 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. It is insoluble in water and any solvent, non-toxic and tasteless, chemically stable, and does not react with any substances except strong alkali and hydrofluoric acid. Various types of silica gel form different microporous structures due to different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics that are difficult to replace by other similar materials: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. Silica gel is divided into: macroporous silica gel, coarse-pored silica gel, B-type silica gel, and fine-pored silica gel according to the size of its pore size. Due to the different pore structures, their adsorption properties have their own characteristics. Coarse-pored silica gel has a higher adsorption capacity under the condition of high relative humidity, while fine-pored silica gel has a higher adsorption capacity than coarse-pored silica gel under the condition of low relative humidity. Between the pores, the adsorption capacity is also between the coarse and fine pores. Macroporous silica gel is generally used as catalyst carrier, matting agent, toothpaste abrasive, etc. Therefore, different products should be selected according to different uses种。 Safety performance The main component of silica gel is silicon dioxide, which is chemically stable and non-flammable. Silica gel is a kind of amorphous silicon dioxide. The dust content in the workshop should be controlled to be no more than 10 mg/m3. It is necessary to strengthen the exhaust air and wear a mask during operation. Silica gel has a strong adsorption capacity and can dry people's skin. Therefore, work clothes should be worn during operation. If silicone gets into your eyes, rinse with plenty of water and seek medical attention as soon as possible. Because blue silica gel contains a small amount of cobalt chloride, it is toxic. It should be avoided from contact with food and inhalation. If a poisoning event occurs, seek medical treatment immediately. Silica gel absorbs water vapor or other organic substances in the medium during use, and its adsorption capacity decreases. It can be reused after regeneration.。 |
