A kind of preparation method of superhydrophobic modified silicon dioxide

Abstract

The invention discloses a preparation method of modified silicon dioxide obtained via super-hydrophobic modification. The preparation method comprises following steps: 1) a raw material A (a silicon dioxide base material, dry powder) is delivered into a mixer, a mixed state is maintained, a raw material C (a super-hydrophobic modification accessory ingredient prepared via mixing of 1.5% acetic acid aqueous solution and isopropanol at a mass ratio of 1-3:4-10) is atomized, and is sprayed into the mixed uniformly, and stirring is kept; 2) a raw material B (a hydrophobic modification agent organic silane coupling agent) is atomized, and is sprayed into the mixer uniformly, and stirring is kept; 3) aging is carried out; and 4) ultrafine grinding is carried out so as to obtain a finished product. Fewer processing steps are needed; energy consumption is low; requirements of industrialized large-scale production can be satisfied; particle size distribution of the modified silicon dioxide obtained via super-hydrophobic modification is uniform; pore structures are stable; and hydrophobic performance is stable. The prepared super-hydrophobic silicon dioxide prepared via the preparation method is taken as a flatting agent, and can be used for providing paint with super hydrophobic performance; film forming coating particle arrangement is uniform; and luster is soft.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method of superhydrophobic modified silicon dioxide. Background technique [0002] With the continuous advancement of science and technology, people's requirements for the quality of life are constantly improving, and the awareness of environmental protection is gradually increasing, which makes the surface with self-cleaning function and anti-corrosion function develop rapidly. In the 1990s, the botanist Barthlott of the University of Bonn in Germany discovered that the wax on the surface of the lotus leaf and the special structure on the surface made the water contact angle of the lotus leaf reach 160°, and the inclination angle was only 2°. In addition, the adhesion of pollutant particles on the surface of the lotus leaf is very low, making it easy for water droplets to slide on the surface, taking away the pollutants and dust on the surface of the lotus leaf. ...

AI Technical Summary

Problems solved by technology

[0005] The existing hydrophobic modification treatment process of silica matting agent generally adopts wet modification treatment method, that is, the silica substrate needs to be dispersed in the liquid first, and then other operations are performed. The whole process needs to add a large amount of organic additives To ensure the super-hydrophobic effect, long-term high-temperature heat preservation operations are required, and there are many follow-up processing procedures and high energy consumption. As a result, it cannot meet the continuity requirements of industrialized large-scale production, and further improvement is urgently needed

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