The difference and application of hydrophilic silica and ...

Hebei Silicon Research Electronic Materials Co., L Product Page

Hydrophilic silica, by its nature, is water-attracting, while hydrophobic silica undergoes modification with hydrophobic groups to repel water. This attribute renders hydrophilic silica suitable for use in aqueous environments, whereas hydrophobic silica demonstrates superior dispersion capabilities in organic systems.

Understanding Hydrophilic Silica

Hydrophilic silica is derived from the hydrolysis process of volatile chlorosilane in an oxyhydrogen flame. These lightweight white powders consist of high-purity amorphous silica. Their hydrophilic nature enables them to wet and disperse effectively in water. Beyond traditional industries such as polyester, silicone, and paints, hydrophilic silica is now finding applications in advanced technological fields. The characteristics of nano-sized particles and high purity are pivotal in enhancing applications in electronics and optical fibers. X-ray analysis confirms the amorphous structure of hydrophilic fumed silica. Depending on varying markets and application needs, we supply an array of products with distinct particle sizes and specific surface areas. Certain fumed silica products can be compressed or provided in medical grade as required.

Key functions of hydrophilic silica include its effectiveness in processing for optimal rheological properties, reinforcement of silicone elastomers, thickening of non-polar liquids, acting as a flow aid for food and industrial powders, demonstrating high chemical purity, elevated insulation even at high temperatures, and conversion of liquids into powders in pharmaceuticals and cosmetics.

Insights into Hydrophobic Silica

Hydrophobic silica is created through chemical reactions involving hydrophilic silica and active silanes such as chlorosilane or hexamethyldisilazane. This results in a product that is water-repellent and cannot disperse in aqueous solutions. To address specialized technical challenges within various industries, diverse forms of hydrophobic silica have been developed. For instance, treating modified hydrophilic silica with silane or siloxane leads to a final product where the chemical agent binds to the original hydrophilic oxide via chemical bonds. Hydrophobic silica shares the benefits of hydrophilic silica, such as low moisture uptake and effective dispersion, while also providing rheological control in polar systems. Additionally, following structural modifications, hydrophobic silica can assist in product development and enhancement. For example, it can integrate into liquid systems in high concentrations with minimal impact on viscosity.

For more details, explore our hydrophobic pyrogenic silica.

Hydrophobic silica serves critical roles in areas such as rheological stability during processing, thickening polar liquids like epoxy resins, fortifying silicone elastomers, and offering enhancements in formulations used for molded products. Its remarkable hydrophobicity is beneficial for improving corrosion resistance, enhancing dielectric properties, and functioning as a flow aid in diverse applications, including powder coatings and fire extinguishing agents, as well as strengthening coatings and plastic against scratches.

Contact Information:

JINSHA PRECIPITATED SILICA MANUFACTURING CO.LTD.

Add.: Gaosha Industrial Zone, Shaxian, Fujian, China

EXPORT OFFICE

Room 908, Taiwan Street No.290, Xiamen, China

Mobile/:+86-

Contact: Wendy Wu, Sally Jiang

Fax.:+86-592-

Our hydrophobic (treated) fumed silica powders provide exceptional performance benefits for a wide variety of applications and industries.

Our CAB-O-SIL® hydrophobic fumed silica products are used around the world to meet our customers' challenging performance requirements. The unique combination of particle characteristics and surface chemistry allows CAB-O-SIL hydrophobic fumed silicas to deliver superior performance for many applications, including:

Performance Benefits

For systems requiring hydrophobic grades, our treated fumed silicas provide a range of performance enhancements:

Contact us to discuss your requirements for silica sol. Our knowledgeable sales team is ready to assist you in identifying the best options for your needs.

• Reduced moisture adsorption
• Anti-settling, thickening, and sag resistance in polar systems
• Scratch and abrasion resistance
• Free-flow and anti-caking properties
• Enhanced corrosion resistance
• Reinforcement capabilities