Preparation method of SiO2/polytetrafluoroethylene hybridized super-hydrophobic coating

Abstract

The invention discloses a preparation method of a SiO2 / polytetrafluoroethylene hybridized super-hydrophobic coating. The preparation method comprises the following steps: hydrolyzing a silane coupling agent in an alcohol-water solvent at appropriate temperature and pH value, allowing the solution to react with silicon sol, enabling the surface of silicon dioxide particles to be grafted with organic radicals, adding a certain volume of PTFE (Polytetrafluoroethylene) emulsion and an auxiliary in the modified silica solution to prepare a uniformly-mixed system, ageing for a certain time, performing coating treatment, and preparing the coating. The preparation method of the SiO2 / polytetrafluoroethylene hybridized super-hydrophobic coating is to utilize the silane coupling agent to modify the silica solution, enable the silanol structures on the surface of the SiO2 particles to be grafted with part of hydrophobic groups, in the meantime improve the dispersibility of the particles, utilize a sol-gel method to enable the modified silica solution and the PTFE emulsion to be hybridized to form the uniformly-mixed system to prepare the super-hydrophobic coating. Therefore, the bonding force between polytetrafluoroethylene and the base material can be effectively improved, the rigidity and the abrasive resistance can be improved, the roughness of the coating surface can be constituted, and furthermore the contact angle on the surface can be increased.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic surfaces, in particular to a SiO 2 The preparation method of polytetrafluoroethylene hybrid superhydrophobic coating. Background technique [0002] Superhydrophobic surfaces have a wide range of applications in textiles, coatings, and microfluidic devices due to their good hydrophobicity. In recent years, how to prepare stable superhydrophobic surfaces through simple preparation processes and common raw materials has become a research hotspot. Although the preparation technology of superhydrophobic surface has made great progress, the preparation methods of superhydrophobic surface and coating reported in the current research have not been transformed into industrial production. Equipment and cost problems restrict the application of superhydrophobic coating film in industry. Looking for A simple and effective method for preparing superhydrophobic coatings will have strong practical sig...

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Problems solved by technology

[0003] The object of the present invention is to provide a kind of SiO 2 / The preparation method of polytetrafluoroethylene hybrid superhydrophobic coating aims to solve the problem of equipment and cost of the existing superhydrophobic coating preparation method that restricts the application of superhydrophobic coating film in industry

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