Description
Hydrophilic fumed silica is a finely divided form of silicon dioxide (SiO2) that has been treated to enhance its affinity for water. It is produced through a process called fuming, where silicon tetrachloride is reacted in a high-temperature flame to form silica particles. These particles are then surface-treated to make them hydrophilic, meaning they have a strong attraction to water molecules.
Hydrophilic fumed silica possesses several unique characteristics that make it valuable in various industries. It has an extremely high surface area, which allows it to absorb and retain large amounts of water, making it useful as a moisture control agent. It can also act as a thickening agent, improving the viscosity and texture of liquid formulations.
Due to its fine particle size and large surface area, hydrophilic fumed silica can also serve as a reinforcing filler, enhancing the mechanical properties of rubber and plastic materials. It provides reinforcement and improves tear strength, abrasion resistance, and dimensional stability.
In the pharmaceutical and cosmetic industries, hydrophilic fumed silica is used as a flow aid, viscosity modifier, and suspension agent in various formulations such as tablets, creams, lotions, and gels. It helps to improve the stability, texture, and performance of these products.
Furthermore, hydrophilic fumed silica finds applications in adhesives, sealants, coatings, paints, and other industrial products where it contributes to rheology control, anti-settling properties, and improved overall performance.
In summary, hydrophilic fumed silica is a versatile and valuable material with hydrophilic properties. It is used to control moisture, enhance viscosity, reinforce materials, and improve the performance of a wide range of products across industries.