Nano silica is one of the nanomaterials with hydroxyl groups on the surface. The particle size is usually 20~60 nm. It has good dispersion and large specific surface area. It is At present, the nanopowder material with the highest output in large-scale industrial production in the world is widely used in electronic packaging materials, polymer composite materials, plastics, coatings, rubber, pigments, ceramics, adhesives, fiberglass, drug carriers, and cosmetics. and antibacterial materials and other fields.
Nano silica has extremely strong ultraviolet and infrared reflection properties. When added to the paint, it can form a shielding effect on the paint and achieve the purpose of resisting ultraviolet aging and thermal aging. , increase the thermal insulation of the coating. At the same time, nano-silica has a three-dimensional network structure, a huge specific surface area, and shows great activity. It can form a network structure when the paint dries, while increasing the strength and smoothness of the paint, and improving the suspension of pigments. It is durable and can keep the color of the paint unchanged for a long time. In recent years, the application of nanosilica in coatings has been rapidly developed.
Powder nano-silica is easy to agglomerate, and it is difficult to achieve true nano-scale uniform dispersion when added directly to the coating. Therefore, surface modification is required first to improve its Dispersion, and then combined with the coating, can achieve a stable combination of real nano-silica and coating
Product characteristics: process: wet method; performance characteristics: solution, dispersion, improved fluidity and better effect when mixed with AD8029
There are two ways to modify nano-silica by surfactant method: one is physical adsorption method; the other is chemical reaction method, that is, in surfactant The reactive groups react with the surface active groups of the silica particles to form new chemical bonds, thereby achieving the purpose of modifying and modifying the surface of the nanoparticles.
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