Research on silica modification technology is an important and active field, and its purpose is to improve the performance of silica to meet the needs of different application fields. Common modification techniques include chemical treatment, physical treatment and filler surface treatment.

First, chemical treatment is a method of changing the surface of silica through chemical reactions. For example, a silane coupling agent is used to modify silica, and the dual reaction function of the coupling agent is used. One end reacts with the hydroxyl group on the surface of the silica, and the other end reacts with the polymer macromolecular chain such as rubber, thereby changing the silica. Black surface properties. This modification method has a significant impact on the vulcanization speed, vulcanization time, maximum torque, tensile strength, tear strength and hardness of silica composite materials. In addition, the alcohol ester method is also a common chemical treatment method, which changes the surface properties of silica through the chemical reaction of fatty alcohols and silicone hydroxyl groups.

Secondly, physical treatment mainly improves the performance of silica by changing its surface morphology or structure. For example, surfactant modification can form a network structure in white carbon black, improving its specific surface area and oil absorption performance. In the application of this modified silica in the field of ink, it can improve the adhesion and color stability of the ink, making the printed matter clearer and more vivid.

Finally, filler surface treatment is to cover the surface of silica with other substances to improve its compatibility with the matrix. This modification method is commonly used in the rubber and plastics industries to improve the wear resistance and weather resistance of products by increasing the strength and hardness of silica.

In addition, surface graft polymer modification is also an important modification method. Through the composite modification process, nano silica surface polymer graft modification and effective dispersion of nano silica agglomerates can be achieved. Changing the reaction conditions and The type and ratio of graft monomers can achieve targeted modification.

The research and application of these modification technologies not only improve the performance of silica, but also expand its application scope in various fields. For example, in the coatings industry, surface-modified silica is often used in sunscreen coatings and weather-resistant coatings. By regulating its hydrophilicity, dispersion and covering properties, it can better combine with the substrate and form a uniform coating. coating to improve the gloss and durability of the coating. At the same time, as a high-performance, environmentally friendly lubricant additive, research on surface modification of ultrafine silica is also in progress. The modified silica has excellent friction properties and can significantly improve the anti-friction of lubricants. and extreme pressure performance and wear resistance.

In general, the research on modification technology of silica is an area full of challenges and opportunities. Through continuous exploration and innovation, it can provide more possibilities for material applications in various industries.