The difference between hydrophilicity and hydrophobicity of gaseous silica

Hydrophilic gaseous silica is prepared by hydrolyzing volatile chlorosilane in oxygen and hydrogen flame. Chemically, these loose white powders are composed of amorphous silica of high purity. Hydrophilic silica can be wetted with water and dispersed in water. In ADDITION TO TRADITIONAL INDUSTRIAL APPLICATIONS such AS polyester, silicone, PAINTS and coatings, hydrophilic VAPorous silica products are increasingly successful in high-tech applications. The nanoparticle characteristics and high purity of gaseous silica make it play a leading role in the applications of electronic and optical fiber industries. The hydrophilic gas - phase silica has an amorphous structure by x - ray analysis. Depending on the market and application area, we can offer different sizes of native particles and different surface areas of products. Some gaseous silica products are available after compression, and some products are pharmaceutical grade.
Hydrophilic gas phase silica function: suitable for processing, adjust to the best rheological properties; Reinforcement of silicone elastomer; Thickening of non-polar liquids; Flow AIDS for food and industrial powders; High chemical purity; Excellent insulation performance even at high temperature; Change a liquid into a powder, as in medicine or cosmetics.
Hydrophobic gaseous silica is prepared by chemical reaction of hydrophilic gaseous silica with reactive silanes such as chlorosilane or hexamethyldisilamane. It is hydrophobic (hydrophobic) and does not disperse in water. In order to solve some special technical problems in industry, various types of hydrophobic gaseous silica have been developed. For example, hydrophobic gaseous silica is produced by treating modified hydrophilic grade gaseous silica with silane or siloxane. In the final product, the chemical treatment agent is chemically bonded to the original hydrophilic oxide. In addition to the above advantages of hydrophilic products, hydrophobic gaseous silica products are characterized by low moisture absorption, good dispersion, and rheological regulation ability even for polar systems. Some products, on the basis of hydrophobic treatment and then through structural modification, can provide further help for customers to develop new products and improve the performance of products. For example, in the liquid system, the hydrophobic gaseous silica can reach a high amount, but the viscosity of the system is little affected.
The function of hydrophobic gaseous silica: the most suitable rheological property in processing; Thickening of polar liquids, such as epoxy resins; Reinforcement of silicone elastomer; High additive amounts, as in molded products; Good hydrophobicity, improve corrosion resistance; Improved dielectric properties, as in cable complexes; Powder flow AIDS, such as in powder coatings and fire extinguishing agents; Improved scratch resistance in paints and plastics.

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