Method for preparing anti-freezing coating aluminum foil

Abstract

The invention relates to the technical field of anti-freezing coatings, in particular to a method for preparing anti-freezing coating aluminum foil. An aluminum foil surface subjected to degreasant cleaning and deionized water cleaning is coated with a corrosion-resistant first coat, curing is carried out, then the cured first coat is coated with a water-based organic and inorganic hybrid anti-freezing coating, then curing is carried out, and the hydrophilic aluminum foil with an anti-freezing function can be obtained. A quite thick non-frozen water layer is provided through an ultra-water absorption resin tail end penetrating into the water layer, and the combined action of the surface water film thickness is reduced through the super-hydrophilic surface, so that the treated hydrophilic surface is only provided with the non-frozen water layer almost; and therefore, anti-freezing performance is obtained. Sodium silicate, polyethylene glycol and ultru-water absorption resin are adopted in topcoat, and a super-hydrophilic freezing preventing coating is obtained in a mutual restraining manner. When water exists, the water absorption resin expands and stretches into the water layer, but cannot be taken away along with water flow due to restraint of a silicon dioxide network. Therefore, continuous freezing preventing performance is achieved.

Description

technical field [0001] The invention relates to the technical field of anti-icing coatings, in particular to a preparation method of an anti-icing coated aluminum foil. Background technique [0002] In transportation, aerospace, heat exchange, power communication and many other fields, icing / frost has brought great harm and potential safety hazards to human beings and society. Although the existing anti-icing methods such as mechanical deicing, heating deicing and spraying chemical reagents are effective, they have problems such as large energy consumption, environmental pollution and poor durability. The use of anti-icing functional coatings to modify the surface of substrates is convenient and effective, and sacrificial coatings, ice-phobic coatings and super-hydrophobic coatings have become research hotspots. [0003] Existing anti-icing / frost technology mainly adopts super-hydrophobic surface treatment, such as Chinese patent CN 104341901 A discloses a kind of organic-i...

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Problems solved by technology

[0003] Existing anti-icing / frost technology mainly adopts super-hydrophobic surface treatment, such as Chinese patent CN 104341901 A discloses a kind of organic-inorganic system coating, uses acrylic resin as film-forming material, adds diatomite, carbon black, isocyanate, hexadecimal Sodium phosphate and silicone defoamer are blended and melted to prepare a wear-resistant anti-icing coating; Chinese patent CN 103013316 A "a super-weather-resistant, wear-resistant and anti-icing wind power blade coating and its preparation method" discloses a Organic-inorganic system coatings, fluorocarbon resins and polyester resins as film-forming materials, supplemented with nano-fillers and dispersants to prepare wear-resistant, weather-resistant, and anti-icing wind turbine blade coatings. These surfaces are controlled by certain surface morphology and low surface energy. The combination of substances can achieve resistance to external pollution or pollutants and easy cleaning, but the anti-icing effect is not clear, especially for long-lasting anti-icing. No relevant research and investigations have been carried out

In the Chinese patent CN 103194130 A, the ice-adhesive anti-icing coating prepared with acrylic resin supplemented with inorganic fillers needs external forces such as wind or gravity to remove the ice layer to achieve the anti-icing effect, which can only accelerate the rapid detachment of the ice layer

[0004] The defects of the existing anti-icing / frost technology are mainly manifested in: the use of a hydrophobic surface cannot satisfy the anti-icing performance for a long time, and it often decays rapidly after repeated use; no effective solution

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