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As one of the main methods of nano-silicon dioxide surface modification, the surface hydrophilicity of the silica after heat treatment is reduced, the moisture absorption capacity is degraded, and compatibility with other inorganic hydrophilic substances is reduced, and the compatibility with organic matter enhanced, mixed after the enhanced dispersion. The application of this method is relatively simple and cost less economical. But it is not effective for improving the adhesion of the interface at the time of filling because the hydroxyl groups of the adjacent hydroxyl groups associated with the hydrogen bonding are reduced by the high temperature heating. Therefore, in practical applications, commonly used zinc-containing compounds on the treatment of nano-silicon dioxide after heat treatment.

In order to effectively improve the polymer affinity and reactivity, the surface of the nano-silicon dioxide is often treated, and the active silanol groups on the surface thereof can react with organic substances such as organosilane or lower alcohols, fatty acids and so on. Multi-lipophilic, can improve the affinity and surface activity.

As the nano-silicon dioxide has a strong adsorption, good plasticity, while a high magnetoresistance and low thermal conductivity. It has been widely used in electronic metallurgy, aerospace and medical and health industries. But also because of its small particle size, high chemical purity, good dispersion and other specific advantages, making it the most promising new inorganic materials. For a lot of related industries to provide a high-quality material development and technical support. Its microstructure is spherical or flaky or quasi-granular, the shape of white amorphous powder, non-toxic, tasteless, non-polluting. It has optical properties, anti-aging, chemical resistance and other chemical properties. And it has a small particle size, high chemical purity, good dispersion and other specific advantages. It also has the advantages of strong adsorption, good plasticity, and high magnetoresistance and low thermal conductivity.

 

 

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