Hydrophobic Pyrogenic Silica

Hydrophobic pyrogenic silica is a type of silica material that has been chemically modified to repel water. Pyrogenic silica, also known as fumed silica, is produced through a high-temperature vapor-phase hydrolysis of silicon compounds. The resulting silica nanoparticles have a high surface area and are typically hydrophilic, meaning they have an affinity for water.

To make pyrogenic silica hydrophobic, surface modifications are carried out using various organosilane compounds. These modifications introduce hydrophobic groups onto the surface of the silica particles, such as methyl (-CH3) or trimethylsilyl (-Si(CH3)3) groups. As a result, the surface of the silica becomes less polar and more repellent to water.

Hydrophobic pyrogenic silica finds applications in a wide range of industries, including coatings, adhesives, sealants, plastics, and pharmaceuticals. Its hydrophobic nature enhances its effectiveness as a thickener, anti-blocking agent, and reinforcing filler in these applications. Additionally, it can improve moisture resistance and stability in formulations where water sensitivity is a concern.

FAQs

What is hydrophobic pyrogenic silica?

Hydrophobic pyrogenic silica is a type of silica nanoparticle that has been treated to repel water. It is commonly used in various industrial applications such as coatings, adhesives, and sealants, and as a thickening agent in paints and inks.

What are the factors to consider when buying hydrophobic pyrogenic silica?

Some key factors to consider include particle size, surface area, purity, surface modification, and the intended application. It's essential to choose a product that meets the specific requirements of your application to achieve optimal results.

Are there any safety considerations when handling hydrophobic pyrogenic silica?

Like any fine particulate material, precautions should be taken to avoid inhalation and skin contact. It's important to follow the safety guidelines provided by Silicon Research and use appropriate personal protective equipment (PPE) when handling hydrophobic pyrogenic silica.

Can hydrophobic pyrogenic silica be customized for specific applications?

Yes, Silicon Research offers customization services to tailor the surface properties and characteristics of hydrophobic pyrogenic silica to meet the unique requirements of different applications. This may involve adjustments to surface modification or particle size distribution.

What are the storage recommendations for hydrophobic pyrogenic silica?

Hydrophobic pyrogenic silica should be stored in a cool, dry place away from moisture and sources of ignition. It's important to keep the product tightly sealed in its original packaging to prevent contamination and degradation.