White carbon black, also known as hydrated silicon dioxide, has a chemical formula of SiO2 nH2O. It is a white, non-toxic, amorphous fine powder inorganic silicon compound with porosity, high dispersibility, light weight, and good chemical stability. It has excellent properties such as high temperature resistance, non-flammability, and good electrical insulation, and has been widely used in many fields such as plastics, rubber, paper, coatings, dyes, and inks.

On the other hand, due to the presence of active silicon hydroxyl groups on the surface of silica, silica is hydrophilic and difficult to infiltrate and disperse in the organic phase, making it unusable in some special fields. However, the modified white carbon black greatly broadens the application field of the product due to the improved surface activity.

Let's take a look at which industries white carbon black is favored by.

07Application in the paper industry
In the paper industry, fumed silica products can be used as paper sizing agent, which can improve the whiteness and opacity of paper, and can improve oil resistance, abrasion resistance, hand feeling, printability and gloss. It can also be used for printing paper, which can make the paper surface quality good, the ink stable, and the back without cracks. It can also be used in azide paper to produce excellent blueprint paper, which can be used in art paper to replace titanium dioxide. Adding 1-2% fumed silica products can reduce the weight of the paper, and the paper is thin, which can improve the strength, prevent ink penetration, and make the printed text clear and increase the opacity.


08Application in toothpaste
Precipitated silica is currently the main variety of abrasives used in toothpaste. Precipitated silica has a 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 good raw material for toothpaste. The refractive index of white carbon black is 1.45-1.50, which is very close to the refractive index of other ingredients in toothpaste, so when mixed together, it acts as a transparent agent. This property is used to create transparent toothpaste, a feature not found in any other abrasive.

09 Application in cosmetics
Non-toxic, odorless, easy to color and other excellent properties of silica make it widely used in the cosmetics industry. Silica is used in skin care products and cosmetics to give the skin a smooth and soft feel ("ball bearing effect"), resulting in a "soft focus effect" that evenly distributes the light on the skin surface, making it less prone to Skin wrinkles and blemishes are perceived. In addition, the thixotropy of silica can prevent pigment from settling, and can be used in products such as lipstick and nail polish.

10 Application of white carbon black in rubber shoes
Silica has high blackness and fine particles. The vulcanizate made of transparent silica has high transparency and can improve the comprehensive physical properties of the rubber. Therefore, silica is widely used as a main reinforcing filler in high-end leather shoes and sports shoes. In the sole production materials, especially in transparent and translucent sole rubber. Improves the abrasion resistance, hardness, tensile strength and tear strength of the sole.

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

12 Application in ink
Silica is also used to control the flow of printer ink so that it does not flow or sag randomly for clear prints. In beverage cans, it controls the use of high velocity 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 is used in herbicides and insecticides in pesticides. Adding a small amount of fumed silica and precipitated silica to the mixture of two common herbicides, dinitroaniline and urea, will prevent the mixture from agglomerating. Adding a small amount of fumed silica to the granular insecticide formula will more effectively control and prevent harmful organisms from being produced. Silica can also be used as an absorbent for pollutants in the soil, absorbing pollutants in the soil.

14 Application in daily necessities
Food packaging bags added with white carbon black can keep fruits and vegetables fresh. White carbon black can also be used as a high-efficiency fungicide to prevent and treat various diseases of fruits; in the production of wine, adding a small amount of white carbon black can purify beer and prolong the fresh-keeping period. In the woven fabric containing vinyl chloride, adding a small amount of fumed silica will change its performance, and silica acts as a matting agent. It only stays on the surface of the braid and does not penetrate the weave.

Source: 粉末网
Disclaimer: The content contained in this article comes from public channels such as the Internet and WeChat public accounts. We maintain a neutral attitude towards the opinions in the article. This article is for reference and communication only. The copyright of the reproduced manuscript belongs to the original author and institution. If there is any infringement, please contact us to delete it.