Preparation method of a sprayable and durable superamphiphobic coating

Abstract

The invention belongs to the field of super-hydrophobic or super-amphiphobic coating preparation, and particularly relates to a method for preparing durable super-amphiphobic coatings capable of being sprayed. The method particularly includes steps of 1, carrying out cleaning and sand blasting roughening treatment on the surfaces of base materials; 2, preparing resin solution; 3, preparing particle composite suspension; 4, spraying the resin solution obtained at the step 2 on the surfaces, treated at the step 1, of the base materials, drying the base materials and carrying out semi-solidification on resin adhesive; 5, spraying the particle composite suspension obtained at the step 3 on the surfaces of the base materials obtained at the step 4, and drying the base materials to completely solidify the base materials; 6, washing the surfaces of the base materials obtained at the step 5 to obtain the durable super-amphiphobic coatings capable of being sprayed. The method has the advantage that the durable super-amphiphobic coatings with excellent durability and firmness can be prepared on the surfaces of the various base materials by the aid of spraying technologies and have persistent anti-freezing performance.

Description

technical field [0001] The invention belongs to the field of super-hydrophobic or super-amphiphobic coating preparation, in particular to a method for preparing a sprayable and durable super-amphiphobic coating. Background technique [0002] In recent years, some materials with extreme wettability on the surface have gradually attracted people's attention. Among them, the superamphiphobic surface has a contact angle of more than 150° for water and oil, a rolling angle of less than 10°, and self-cleaning properties. properties have aroused great interest in academia and industry. In nature, the leaves and petals of many plants, the wings of insects, and the feathers of birds are all natural superhydrophobic materials. From previous studies, we can know that the superhydrophobic and superoleophobic properties of the material surface are mainly attributed to the rough micro / nano-rough structure of the surface and the low surface energy of the surface. On the basis of this the...

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Problems solved by technology

[0004] However, the practical application of superhydrophobic and superoleophobic coatings has not yet been popularized. One of the main reasons is the poor durability of superhydrophobic and superoleophobic coatings.

When the super-hydrophobic surface is subjected to external forces such as friction or impact, the microscopic rough convex structure on the surface is subjected to bearing pressure and shear stress, which leads to the damage of the surface rough structure due to stress concentration, and finally leads to superhydrophobic or superoleophobic function. sexual failure

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