The role of nano SiO2 in industry

Characteristics and morphology of nano SiO2
Nano SiO2 is a non-toxic, colorless, non polluting inorganic non-metallic materials, a single nano SiO2 particles due to its strong surface forces and reunion, forming a two structure . In the preparation of the coating, it is necessary to modify the surface of the coating, so that it is in a dispersed state, so as to improve the dispersion of the matrix. Nano SiO2 particles have many excellent properties, such as high temperature resistance, wear resistance, corrosion resistance and aging resistance . Compared with ordinary SiO2, SiO2 nanoparticles surface non coordination atoms are significantly improved and the possibility of polymer particle physics, chemical combination, but also enhance the bonding possibility, to increase the strength and thermal stability of the role. The nano SiO2 particles were in the state of fluffy powder , and the purity was up to 99.9%. The TEM (transmission electron microscopy) images of SiO2 showed that the particle size was about 20 nm, and the initial state of nano SiO2 was amorphous.
Application of nano SiO2 in coatings
In the paint, the use of nano SiO2 particles on the surface of , volume effect, quantum size effect and macroscopic quantum tunneling effect, can increase the hardness of film coating, improve wear resistance, impact resistance and flexibility performance. Therefore, more and more attention has been paid to the application of nano SiO2 in coatings.
Application of nano SiO2 in architectural coatings
In building paint, add a dash of nano SiO2 can improve the coating wear resistance, corrosion resistance, ageing resistance performance, and improve the coating self-cleaning ability, which has been widely used in wall paint. The performance of gold Zhunian application of nano SiO2 modified exterior wall coatings, nano SiO2 coatings found can reduce color values, improve aging resistance. Wang Yaqiang and others focused on the stability of nano SiO2 composite coating, and finally found the influence factors of nano SiO2 on the stability. Deng Qianjun et al on the nano SiO2 modified exterior wall coatings were studied, the pretreatment of different ratio combinations of SiO2 nanoparticles were added to that of pure acrylic emulsion paint for exterior wall, when adding 4% nano SiO2, can stability, adhesion, gloss, resistance to contamination characteristics such as improved coatings.