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Applications and synthesis methods of vapor silica

Vapour phase silicon dioxide as an additive added to the coating has the best amount of addition, such as insufficient reserve, not up to the expected effect. But adding too much causes waste and may have side effects, and paint product quality declines. To give full play to the function of vapour silica, it is necessary to understand the coating formula fully, analyze which raw materials will hinder or promote the role of vapour silica, and choose the best amount of addition. In general, materials with multiple hydrogen bonds can improve their efficiency. In addition, the PH value of the water-based system significantly impacts the function of the vapour silica. When the PH is between 7.5 and 8.5, unless additives are added, the vapour silica will not play its role effectively. When the PH exceeds 10.8, the vapour silica will dissolve in water. Vapour silica has a large specific surface area and high surface energy, so it is very easy to agglomerate. It must be adequately dispersed in the application process to achieve the most effective effect. In coating production, the surface treatment of vapour silica, adding way, the choice of dispersion equipment, etc., affect the dispersion state of vapour silica in the coating. The three-dimensional network structure can only fully form if the dispersion is sufficient. Only a tiny part of the network can be created if the distribution is excessive. Similar to other thickeners, the ratio of slurry directly determines the dispersion efficiency, only the appropriate balance can be dispersed entirely; The order of addition also has an effect on the dispersion efficiency. It is generally best to spread the white carbon black into pre-pulp, then put in the powder dispersion fineness. If the white carbon black and powder are fed together and dispersed simultaneously, the dispersion efficiency will be reduced, and the thickening and anti-sinking effect of the white carbon black will be directly affected. If you are looking for high quality, high purity and cost-effective Fumed silica, or if you require the latest price of Fumed silica, please feel free to email contact mis-asia.

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