Name:

Fumed silica

Appearance:

Fluffy white powder.

Applications of Fumed Silica

Due to its small particle size, the specific surface area is big, therefore the surface adsorption power, surface energy, high chemical purity

Package Storage and Transportation

This product's hygroscopicity is strong, with more than three layers of kraft paper valve bag packaging, using vacuum packaging machines, automatic packaging.

Description of Fumed Silica

Fumed silica, molecular formula is SiO2. White fluffy powder, porous, non-toxic, tasteless and pollution-free, high-temperature resistant. At the same time, it has the chemical inertness and special thixotropy can significantly improve the tensile strength, tear-resistance, and wear resistance of rubber products, rubber improved strength increased by tens of times. It can be used as rheological and thixotropic control for liquid systems, adhesives, polymers, etc., as an anti-sink, thickening, anti-sagging additive, reinforcement for HCR and RTV-2K silicone rubber, used to regulate free flow, and as an anti-caking agent to improve powder properties, etc. ZHONGTIAN EAST FLUORINE SILICON MATERIAL CO.,LTD. provides fumed silica for sale. As fumed silica manufacturers , we can offer a reasonable fumed silica price. Customers can buy fumed silica for their different needs.

The Role of Fumed Silica in Coatings

Rheology additives

Rheology is an important property of coatings, which directly affects the appearance, construction performance and storage stability of coatings, and the requirements of rheology additives vary from coating system to coating system. For oil-based systems, most of the rheology additives work by forming hydrogen bonds. The untreated fumed silica aggregates on the surface contain multiple, one of which is isolated and undisturbed free, and the other is continuous, forming hydrogen bonds with each other. When the shear force is removed, the three-dimensional structure will recover itself and the viscosity will rise. In completely non-polar liquids, the viscosity recovery time is only a fraction of a second; in polar liquids, the recovery time is longer, depending on the concentration of fumed silica and its degree of dispersion, this characteristic gives oil-based coatings very good storage and construction performance, especially thick paste-shaped coatings, both to ensure that the coating in a certain construction shear has good fluidity, but also to ensure that the coating film of a construction thickness, usually, In the construction process, because the solvent at the edge of the coating evaporates faster, resulting in uneven surface tension, easy to make the coating move to the edge, and the silica network can effectively prevent the movement of the coating and form a thick edge, but also to prevent the coating in the curing process of the hanging phenomenon, so that the coating uniform. At the same time, fumed silica can form hydrogen bonds and increase the low and medium shear viscosity in the system, thus playing a thickening role. Therefore, fumed silica is very widely used in oil-based systems.

Fumed Silica Powder in Foods

Silicon dioxide, a non-metallic oxide formed from silicon and oxygen, can be divided into two main groups; crystalline and amorphous silica. Crystalline silica may exist in several different forms, including quartz, square quartz, and tridymite. Amorphous silica mainly includes hydrolytic silica and fumed silica. The conventional form of amorphous silica is known as a food additive, and fumed silica powder has been used for many years as an important component in food applications such as sauces and seasoning powders, instant noodles, pancake and cake mixes, coffee creamers and vitamins.