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After reading these 14 applications of silica, do you find that it is everywhere around you? (THREE)

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08 Application in toothpaste
Precipitated silica is the main variety of abrasives used in toothpaste at present. Precipitated silica has large total specific surface area, strong adsorption capacity, many adsorbed substances, and uniform particles, which is conducive to improving transparency. Because of its stable properties, non-toxic and harmless, it is a better toothpaste raw material. The refractive index of silica is 1.45 to 1.50, which is very close to the refractive index of other ingredients in toothpaste, so when mixed together, it acts as a clearing agent. This property is used to make clear toothpaste, a feature not found in any other abrasive.


09 Application in cosmetics
The excellent properties of white carbon black, such as non-toxic, odorless and easy to color, make it widely used in the cosmetic industry. Silica is used in skin care and cosmetic products to give the skin a smooth and soft feel ("ball bearing effect"), resulting in a "soft focus effect" that evenly distributes the light hitting the skin surface, making it difficult to Wrinkles and blemishes in the skin are noticed. In addition, the thixotropy of silica can prevent pigment sedimentation, which can be used in products such as lipstick and nail polish.


10 Application of silica in rubber shoes
The white carbon has high black and white degree and fine particles. The vulcanized rubber prepared by using transparent white carbon black has high transparency and can improve the comprehensive physical properties of the rubber compound. Therefore, white carbon black is widely used as the main reinforcing filler in high-end leather shoes and sports shoes. In the sole making material, especially in the transparent and translucent sole compound. It can improve the abrasion resistance, hardness, tensile strength and tear strength of the sole.


11 Applications in the pharmaceutical industry
Silica has physiological inertness, high absorption, dispersibility and thickening properties, and has been widely used in pharmaceutical preparations. French researchers found that adding a small amount of fumed silica to ranitidine, metamide, pirenzepine and other drugs would change their fluidity; in drugs containing griseofulvin, adding a small amount of fumed silica would change their fluidity. A small amount of fumed silica can change its dissolution rate, that is, to change the dispersibility and absorption of poorly soluble drugs in water; adding a small amount of fumed silica to the powder containing aspirin will change the antistatic properties of the powder. sex.

Silica can also be used as an absorbent and dispersing agent in the production of western medicine tablets such as vitamin C; in the production of pharmaceutical capsules, adding a small amount of silica can act as a carrier. According to the editor of China Powder Network, Japanese researchers found that adding a small amount of white carbon black to the formula of polyethylene packaging materials can be used to make sterile packaging films for medical articles.

12 Application in ink
Silica is also used to control the flow of printer ink so that it cannot flow or sag at will for clear prints. In beverage cans, it controls the use of high-speed spray coatings. Fumed silica is also used as a dispersant and flow control agent in toner cartridges for copiers and laser printers.

13 Application in pesticides
Silica can be used in herbicides and insecticides in pesticides. Adding small amounts of fumed silica and precipitated silica to a common mixture of two herbicides, dinitroaniline and urea, will prevent the mixture from caking. In granular pesticide formulations, adding a small amount of fumed silica will more effectively control and prevent the production of harmful organisms. Silica can also be used as an absorbent for pollutants in the soil, absorbing pollutants in the soil.

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