A kind of super wear-resistant super amphiphobic coating and its preparation method and application

Abstract

A super-abrasion-resistant super-amphiphobic coating and its preparation method and application belong to the technical field of coating preparation. The preparation process is as follows: mix the resin powder, hydrophobic powder and additives, put them into a twin-screw mixer to melt, extrude, press and crush the flakes, grind and sieve the crushed flakes to obtain a powder coating, and disperse the water-based silica sol in In the aqueous solution, add ammonia water for alkali treatment, then add the above solution into the ethanol solution, mix well and then add the hydrophobic modifier, after stirring and standing still, the nano-super amphiphobic coating is obtained, and the powder coating is electrostatically sprayed to obtain the bottom paint coating, and then spray the nano-super amphiphobic coating on the surface of the primer coating to obtain a super wear-resistant super amphiphobic coating. The present invention prepares a surface structure with a large roughness through an electrostatic powder spraying process, and the introduction of a functional topcoat coating can obtain a super-amphiphobic coating with both ultra-high wear resistance and anti-icing performance, which can be applied to the preparation of kitchen equipment, The inner wall of refrigeration equipment or the outer wall of outdoor facilities in cold areas.

Description

technical field

[0001] The invention belongs to the technical field of coating preparation, and in particular relates to a super-wear-resistant super-amphiphobic coating and a preparation method and application thereof. Background technique

[0002] Based on the concept of bionics, people first observed the special micro-nano composite structure on the surface of the lotus leaf, thus proposed the concept of superhydrophobic, and developed a superhydrophobic surface coating; further, through its The surface energy is further reduced, which can make it superoleophobic. Through a large number of studies, it has been found that superhydrophobic surfaces in nature often have rough nanostructures and low surface energy substances, so constructing rough surfaces on low surface energy substances and modifying low surface energy substances on rough surface structures can be prepared. Superhydrophobic surface biomimetic coating. However, among the superhydrophobic coatings prepared ...

Examples

Embodiment 1

[0040] In this embodiment, common commercially available polyester powder coatings are used.

[0041] (1) Preparation of existing powder coating: uniformly spray the existing polyester powder coating on the aluminum alloy substrate by electrostatic spraying, the input voltage is 220V, the electrostatic output voltage of the spray gun is 100KV, the powder supply pressure is 0.5MPa, and the spraying distance 200mm.

[0042] (2) Resin hot-melt curing: place the painted sample in an oven at 220°C and heat for 10 minutes, so that the resin powder in the coating is fully melted and cured, and the existing powder coating can be obtained.

[0043] The coating sample prepared in Example 1 was tested, and the cross-hatch test adhesion results showed that the paint film adhesion was first grade, and other test results are shown in the table below.

[0044] Table of performance data of coated samples and their wear after different cycles

[0045]

Embodiment 2

[0047] In this embodiment, the resin powder is epoxy resin powder used for electrostatic plastic spraying, and the particle size of the resin powder is 200 nm˜2 μm. The hydrophobic powder is hydrophobic silicon dioxide powder, and the particle size of the hydrophobic powder is 1-50 μm. The preparation method of the hydrophobic silica is as follows: firstly, disperse 3g of water-based silica sol in 16mL of aqueous solution, add 4mL of 1vt.% ammonia water for alkalization; then add the above solution into 80mL of ethanol solution, mix well and then add 0.6mL Heptadecafluorodecyltrimethoxysilane was used for hydrophobic modification of the surface. After mechanical stirring and natural standing for 24 hours, it was dried at 80°C, pulverized by a crusher, and then passed through a 200-mesh sieve to obtain hydrophobic silica powder.

[0048] A preparation method of an ultra-wear-resistant super-amphiphobic coating, comprising the following steps:

[0049] (1) Preparation of nano-s...

Embodiment 3

[0059] In this embodiment, the resin powder is a fluorocarbon resin powder used for electrostatic plastic spraying, and the particle size of the resin powder is 200 nm˜2 μm. The hydrophobic powder is hydrophobic silicon dioxide powder, and the particle size of the hydrophobic powder is 1-50 μm. The preparation method of the hydrophobic silica is as follows: firstly, disperse 3g of water-based silica sol in 16mL of aqueous solution, add 4mL of 1vt.% ammonia water for alkalization; then add the above solution into 80mL of ethanol solution, mix well and then add 0.6mL Heptadecafluorodecyltrimethoxysilane was used for hydrophobic modification of the surface. After mechanical stirring and natural standing for 24 hours, it was dried at 80°C, pulverized by a crusher, and then passed through a 200-mesh sieve to obtain hydrophobic silica powder.

[0060] A preparation method of an ultra-wear-resistant super-amphiphobic coating, comprising the following steps:

[0061] (1) Preparation ...

technical field

[0001] The invention belongs to the technical field of coating preparation, and in particular relates to a super-wear-resistant super-amphiphobic coating and a preparation method and application thereof. Background technique

[0002] Based on the concept of bionics, people first observed the special micro-nano composite structure on the surface of the lotus leaf, thus proposed the concept of superhydrophobic, and developed a superhydrophobic surface coating; further, through its The surface energy is further reduced, which can make it superoleophobic. Through a large number of studies, it has been found that superhydrophobic surfaces in nature often have rough nanostructures and low surface energy substances, so constructing rough surfaces on low surface energy substances and modifying low surface energy substances on rough surface structures can be prepared. Superhydrophobic surface biomimetic coating. However, among the superhydrophobic coatings prepared ...

Examples

Embodiment 1

[0040] In this embodiment, common commercially available polyester powder coatings are used.

[0041] (1) Preparation of existing powder coating: uniformly spray the existing polyester powder coating on the aluminum alloy substrate by electrostatic spraying, the input voltage is 220V, the electrostatic output voltage of the spray gun is 100KV, the powder supply pressure is 0.5MPa, and the spraying distance 200mm.

[0042] (2) Resin hot-melt curing: place the painted sample in an oven at 220°C and heat for 10 minutes, so that the resin powder in the coating is fully melted and cured, and the existing powder coating can be obtained.

[0043] The coating sample prepared in Example 1 was tested, and the cross-hatch test adhesion results showed that the paint film adhesion was first grade, and other test results are shown in the table below.

[0044] Table of performance data of coated samples and their wear after different cycles

[0045]

Embodiment 2

[0047] In this embodiment, the resin powder is epoxy resin powder used for electrostatic plastic spraying, and the particle size of the resin powder is 200 nm˜2 μm. The hydrophobic powder is hydrophobic silicon dioxide powder, and the particle size of the hydrophobic powder is 1-50 μm. The preparation method of the hydrophobic silica is as follows: firstly, disperse 3g of water-based silica sol in 16mL of aqueous solution, add 4mL of 1vt.% ammonia water for alkalization; then add the above solution into 80mL of ethanol solution, mix well and then add 0.6mL Heptadecafluorodecyltrimethoxysilane was used for hydrophobic modification of the surface. After mechanical stirring and natural standing for 24 hours, it was dried at 80°C, pulverized by a crusher, and then passed through a 200-mesh sieve to obtain hydrophobic silica powder.

[0048] A preparation method of an ultra-wear-resistant super-amphiphobic coating, comprising the following steps:

[0049] (1) Preparation of nano-s...

Embodiment 3

[0059] In this embodiment, the resin powder is a fluorocarbon resin powder used for electrostatic plastic spraying, and the particle size of the resin powder is 200 nm˜2 μm. The hydrophobic powder is hydrophobic silicon dioxide powder, and the particle size of the hydrophobic powder is 1-50 μm. The preparation method of the hydrophobic silica is as follows: firstly, disperse 3g of water-based silica sol in 16mL of aqueous solution, add 4mL of 1vt.% ammonia water for alkalization; then add the above solution into 80mL of ethanol solution, mix well and then add 0.6mL Heptadecafluorodecyltrimethoxysilane was used for hydrophobic modification of the surface. After mechanical stirring and natural standing for 24 hours, it was dried at 80°C, pulverized by a crusher, and then passed through a 200-mesh sieve to obtain hydrophobic silica powder.

[0060] A preparation method of an ultra-wear-resistant super-amphiphobic coating, comprising the following steps:

[0061] (1) Preparation ...

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