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A kind of preparation method of anti-fog self-healing coating
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A self-healing and coating technology, applied in the direction of coating, etc., can solve the problem of high cost and achieve the effect of strong self-healing, high anti-fog, and high transparency
Active Publication Date: 2020-08-28
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology
The coating has good self-healing performance, good anti-fog performance, and excellent mechanical properties, but the cost is high
Method used
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[0024] In the second step, the mixed solution in step 1 is coated on the glass substrate by dip coating to form a 50nm thin film coating, and dried at room temperature.
[0025] In the third step, the coating in step 2 is quenched at 100°C to obtain the required self-healing transparent anti-fog coating.
[0026] After the coating is scratched, it can self-heal the crack within 24 hours. No fogging under water vapor. Resistant to more than 50 scratches without damage, and after being scratched, the surface can be restored to a flat surface within 24 hours on water vapor.
[0029] In step 2, the mixed solution in step 1 was coated on a polyethylene terephthalate (PET) substrate by spin coating to form a coating with a thickness of 600 nm, and dried at room temperature.
[0030] In the third step, the coating in step 2 is quenched at 150°C to obtain the required self-healing transparent anti-fog coating.
[0031] After the coating is scratched, it can self-heal the crack within 24 hours. No fogging under water vapor. Resistant to more than 100 scratches without damage, and after being scratched, the surface can be restored to a flat surface within 24 hours on water vapor.
Embodiment 3
[0033] In the first step, the hydrolyzate of styrene-maleic anhydride copolymer (Mw~1 million) is dissolved in distilled water with polyvinyl alcohol (Mw~1 million) according to the mass ratio of 1:5, and the concentration is 1wt%. solution.
[0034] In the second step, the mixed solution in step 1 is coated on the resin lens by a dip coating method to form a coating with a thickness of 200 μm, and dried at room temperature.
[0035] In the third step, the coating in step 2 is quenched at 180°C to obtain the required self-healing transparent anti-fog coating.
[0036] After the coating is scratched, it can self-heal the crack within 24 hours. No fogging under water vapor. Resistant to more than 2,000 scratches without damage, and after being scratched, the surface can be restored to a flat surface within 24 hours on water vapor.
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Abstract
The invention discloses a preparation method of an anti-fog self-restored coating. The method comprises the steps of: dissolving a maleic anhydride-styrenecopolymer or a hydrolyzate thereof and a water-soluble polymer in a solvent, and conducting uniform mixing to obtain a mixed solution; coating or spraying a base material with the mixed solution to form a coating layer, and airing the coating layer at room temperature; and conducting quenching at 100-180 DEG C to obtain the anti-fog self-restored coating. The anti-fog transparent coating with self-restoration function disclosed by the invention not only has high anti-fog property (no fog on water vapor), high transparency (transmittance of 90% or more), and strong self-restoration property (restoration is finished within 24 hours), andhigh mechanical strength and scratch resistance (resistance to 2000 times of scratch). The prepared anti-fog self-restored coating has the advantages of wide source of raw materials, low price and simple process, and the preparation method is simple, convenient to operate, repeatable for multiple times, friendly to environment and energy-saving.
Description
technical field [0001] The invention belongs to the technical field of polymer coatings, and in particular relates to a preparation method of an anti-fog self-repairing coating. Background technique [0002] Fogging will reduce the transparency of transparent materials (or devices), which not only brings inconvenience to the use of devices and tools, but also poses potential dangers during use; it also weakens the original appearance of the surface of non-transparent materials. With the development of high technology, the requirements for the use of equipment are getting higher and higher. Therefore, there is an increasing demand for high-performance anti-fog coatings. In recent years, the development of anti-fog coatings has developed in the direction of economy, high performance and intelligence. The preparation method is developed from complex synthesis process and complex film forming process to simple preparation technology. [0003] Water-soluble polymer coatings su...
Claims
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Application Information
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