A cactus skin biomimetic wear-resistant anti-aging protective coating

Abstract

This invention discloses a biomimetic wear-resistant and anti-aging protective coating for cactus skin, belonging to the field of material surface protection technology. This coating features a dual-layer composite protective structure mimicking the waxy and cuticle layers of cactus skin. It consists of a bottom adhesion-enhancing layer and a top biomimetic wear-resistant and weather-resistant layer. The bottom layer uses modified epoxy resin to improve substrate adhesion, while the top layer replicates the hydrophobic, wear-resistant, and UV-resistant properties of cactus skin wax, with the addition of nano-titanium dioxide and wear-resistant ceramic particles. This achieves multiple properties of the coating, including wear resistance, UV resistance, aging resistance, and hydrophobic self-cleaning properties. It is suitable for surface protection of outdoor metal, plastic, and concrete substrates, solving the problems of easy wear, aging, and short service life of outdoor coatings.

Description

Technical Field

[0001] This invention relates to the field of protective coating technology for material surfaces, specifically to a biomimetic wear-resistant and anti-aging protective coating for cactus skin. Background Technology

[0002] The surfaces of substrates such as outdoor buildings, machinery, and photovoltaic components require protective treatment. Traditional protective coatings have limited functions and are prone to wear, cracking, powdering, aging, and peeling when exposed to ultraviolet rays, wind, sand, and rain for extended periods, resulting in a short protective lifespan. Cactus skin has a double-layer protective structure of wax and cuticle, which can resist desert sand abrasion, ultraviolet radiation, and water erosion, exhibiting excellent weather resistance, wear resistance, and protective properties. Currently, there is limited research and development of biomimetic protective coatings based on these properties, which cannot meet the multi-dimensional protection needs of outdoor substrates. Therefore, developing a biomimetic wear-resistant and anti-aging protective coating has significant application value. Summary of the Invention

[0003] To address the issues of poor wear resistance and weather resistance in traditional outdoor protective coatings, this invention provides a cactus-derived biomimetic wear-resistant and anti-aging protective coating. Through a double-layer composite structure design, combining wear-resistant particles and anti-aging additives, it achieves comprehensive protective effects with high adhesion, wear resistance, UV resistance, and hydrophobic self-cleaning properties.

[0004] The technical solution of this invention is as follows: the coating is divided into a bottom adhesion enhancement layer and a surface biomimetic wear-resistant and weather-resistant layer. The bottom layer enhances the bonding force with the substrate to prevent the coating from falling off; the surface layer simulates the hydrophobic and weather-resistant properties of the waxy layer of cactus skin, and adds nano-anti-ultraviolet components and wear-resistant particles to improve the wear resistance and anti-aging performance of the coating and extend its outdoor service life.

[0005] The beneficial effects of this invention are: 1. The double-layer structure has strong bonding force, is not easy to fall off, and has excellent wear resistance; 2. It is resistant to ultraviolet rays and aging, and its outdoor service life is increased by more than 100%; 3. It is hydrophobic and self-cleaning, which can reduce dust adhesion and reduce maintenance costs. Detailed Implementation

[0006] Example 3: A biomimetic wear-resistant and anti-aging protective coating for cactus skin, wherein the bottom adhesion enhancement layer is 35μm thick and uses an aminosilane coupling agent to modify epoxy resin, with the coupling agent added at 6% of the resin mass; the surface biomimetic wear-resistant and weather-resistant layer is 55μm thick, using fluorocarbon resin as the base material, and the mass ratio of nano-silicon carbide to titanium dioxide is 1:1.3, with particle sizes of 80nm and 25nm, respectively; Performance tests showed that the coating had a water contact angle of 115°, no exposed substrate after 5500 revolutions of abrasion resistance, and no cracking or powdering after 1200 hours of UV aging. The formula for evaluating the aging resistance of the coating is: P = T / T0 × 100% In the formula: P is the aging resistance compliance rate; T is the aging test duration of the coating of the present invention, in hours; T0 is the aging test duration of the traditional coating, in hours.

Claims

1. A biomimetic wear-resistant and anti-aging protective coating for cactus skin, characterized in that, It has a two-layer composite structure, including a bottom adhesion enhancement layer attached to the surface of the substrate and a surface biomimetic wear-resistant and weather-resistant layer covering the bottom layer.

2. The protective coating according to claim 1, characterized in that, The bottom adhesion enhancement layer has a thickness of 30~40μm and is a modified epoxy resin coating. The modifier is an aminosilane coupling agent, and the amount added accounts for 5%~8% of the resin mass. The surface biomimetic wear-resistant and weather-resistant layer has a thickness of 50~60μm and is composed of fluorocarbon resin, nano titanium dioxide, silicon carbide wear-resistant particles, and biomimetic wax additives.

3. The protective coating according to claim 2, characterized in that, In the surface wear-resistant and weather-resistant layer, the particle size d1 of silicon carbide wear-resistant particles satisfies the formula: d1 = 50nm~100nm, the particle size of nano titanium dioxide d2 = 20nm~30nm, and the mass ratio of the two is 1:1.2~1:1.

5.

4. The protective coating according to claim 1, characterized in that, The coating surface has a water contact angle θ ≥ 110°, an abrasion resistance of ≥ 5000 revolutions, and no cracking or powdering during ultraviolet aging test for ≥ 1000 hours.