Fluorinated thin film coating and preparation method thereof

Abstract

The invention provides fluorinated thin film coating. The fluorinated thin film coating is prepared from the following raw materials in parts by weight: 0.1 to 0.3 part of 1H,1H,2H,2H-perfluorodecyltriethoxysilane, 0.7 to 1 part of zinc acetylacetonate, 1 to 2 parts of calcium fluoride, 4 to 5 parts of ammonium bicarbonate, 1 to 1.5 parts of vanadyl sulfate hydrate, 6 to 7 parts of sodium tungstate dihydrate, 20 to 30 parts of a silane coupling agent KH570, 5 to 7 parts of methyltriethoxysilane, 60 to 70 parts of 2 percent to 3 percent ammonia water solution, 0.3 to 0.4 part of aminopropyltriethoxysilane, 0.1 to 0.2 part of butyl oleate, 0.3 to 1 part of sodium butylnaphthylsulfonate, 1 to 3 parts of polyethylene glycol 1000 and 0.1 to 0.2 part of p-toluenesulfonamide. The silane coupling agent KH570 is used for carrying out modification treatment, and molecules of the silane coupling agent KH570 are grafted on tungsten-doped vanadium dioxide powder particles, so that the hydrophobicity of modified particles is effectively improved, and the surface strength of a coating film is further improved.

Description

Technical field [0001] The invention relates to the technical field of thin film coatings, in particular to a fluorinated thin film coating and a preparation method thereof. Background technique [0002] Inorganic nanoparticles can play a role in mechanical enhancement or impart new functions to coatings and have received widespread attention. The dispersion of nanoparticles is particularly important for the realization of their functions, especially the preparation of highly transparent organic-inorganic nanocomposite coatings. [0003] Vanadium dioxide has great application prospects in intelligent heat insulation and energy-saving coatings. However, due to the limitation of its preparation method and process, and the strong absorption of vanadium dioxide metal phase and semiconductor phase in the short-wave range, vanadium dioxide thin films usually have The low optical transparency greatly limits its practical application. Therefore, the antireflection of vanadium dioxide fil...

AI Technical Summary

Problems solved by technology

[0003] Vanadium dioxide has great application prospects in intelligent thermal insulation and energy-saving coatings, but due to the limitation of its preparation method and process, as well as the strong absorption of vanadium dioxide metal phase and semiconductor phase in the short-wave range, vanadium dioxide thin films usually have Low optical transparency, which greatly limits its practical application

Although many preparation methods of vanadium dioxide and doped vanadium dioxide powders and films have been reported, there is still a long way to go before its practical application.

First of all, commonly used preparation techniques such as magnetron sputtering, vapor deposition and other equipment are expensive and costly, and it is difficult to achieve large-area coating; secondly, due to their own limitations, the prepared vanadium dioxide or vanadium dioxide (W) The transparency of the film in the visible light region is poor, and there is basically no possibility of practical application

Although many attempts have been made in anti-reflection, such as doping and coating anti-reflection film, the improvement of transparency is still relatively limited; again, the existing reports are basically focused on vanadium dioxide or vanadium dioxide (W) Preparation of pure membranes with little foray into organic coating routes to produce vanadium dioxide thermochromic coatings

Fourth, there are few reports on the stability of vanadium dioxide powder or film (including composite film)

In the above process, the compatibility between the nanoparticles and the dispersion medium and the compatibility between the nanoparticles and the organic resin may cause conflicts. If the grafted organic molecules are not compatible with the resin, the resin will be cured. During the drying process, phase separation between the nanoparticles and the organic phase may occur, resulting in a decrease in the transparency of the nanocomposite coating