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Address: No.12B,Dashan East Street,First Industrial Area,Xiagang Village,ChangAn Town,Dongguan City,Guangdong Province,China
Tel : +86 0769-8537 6998
Fax : +86 0769-8537 5577
Email : andy@xianghongrubber.com

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How does silicone rubber change color news source: release time : 2017.06.29
1, the silicate gel with cobalt chloride solution soaked and then dried and activated, available to silicone rubber discoloration. When it is used as a desiccant, it is blue before water absorption, reddish after water absorption, and can be seen from the change of color, and whether regeneration is needed. Silicone rubber is also widely used in the recovery of steam, oil refining and catalyst preparation and so on.
2, silicone rubber is silicic acid gel mSiO2 · nH2O appropriate dehydration from the particles of different sizes of porous substances. With an open porous structure, the specific surface area (unit mass surface area) is large, can adsorb many substances, is a good desiccant, adsorbent and catalyst carrier.
3, the adsorption of silicone rubber is mainly physical adsorption, can be recycled and repeated use. In the alkali metal silicate (such as sodium silicate) solution by adding acid, acidification, then add a certain amount of electrolyte to stir, that is, the formation of silicic acid gel; or in the thick sodium silicate solution to add acid or Ammonium salts also produce silicic acid gels. The silicic acid gel was allowed to stand for several hours to age, and then the soluble salts were washed with hot water, dried at 60-70 ° C and activated at about 300 ° C to obtain silica gel.
4, silicone rubber 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.
  • Contact Us
  • Address: No.12,Dashan East Street,First Industrial Area,Xiagang Village,ChangAn Town,Dongguan City,Guangdong Province,China
  • Tel : 0769-8537 6998
  • Fax : 0769-8537 5577
  • Email : andy@xianghongrubber.com
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