Highly-wear-resistant super-hydrophobic composite coating and preparation method thereof

Abstract

The invention discloses a highly-wear-resistant super-hydrophobic composite coating and a preparation method thereof. The preparation method includes the steps that the surface of a base is coated with hydrophobic resin primer containing compound micropowder through a brush coating or spray coating method, the surface of the resin primer is sprayed with hydrophobic organic / inorganic hybrid nano-paint after semi-curing, and the highly-wear-resistant super-hydrophobic composite coating is obtained after complete curing. The highly-wear-resistant super-hydrophobic composite coating and the preparation method thereof have the advantages that equipment and the process are simple, operation is easy and cost is low, and have the industrial mass production prospect. The prepared super-hydrophobic composite coating can be applied to various hard / soft bases such as glass, copper, aluminum, stainless steel, exterior wall tiles, wood, paper and cloth and can bear damage of external force such as sanding.

Description

technical field

[0001] The invention belongs to the field of coating preparation, in particular to a high wear-resistant super-hydrophobic composite coating and a preparation method thereof. Background technique

[0002] The unique super-wetting characteristics of the super-hydrophobic surface make the super-hydrophobic material have self-cleaning, drag reduction, waterproof, anti-fog, anti-ice, heat transfer and other functions. The structure preparation of superhydrophobic materials has become a hot spot in the research of thin film materials, and has broad application prospects in aviation, navigation, energy, construction, electronics, anti-corrosion, sensors, heat transfer and other fields. The characteristics of superhydrophobic are determined by the hydrophobicity and roughness of the substance. Low surface free energy and suitable roughness are two indispensable factors for the preparation of superhydrophobic surfaces.

[0003] At present, the preparation technologi...

Examples

preparation example Construction

[0036] A method for preparing a highly wear-resistant super-hydrophobic composite coating, the steps are:

[0037](1) Preparation and preparation of the primer: Add the hydrophobic resin to the compatible solvent in a certain proportion, and disperse it for 5-30 minutes under the compound conditions of ultrasonic and 500-1500rpm mechanical stirring until the resin is completely dissolved to obtain a resin solution, and then add a certain proportion The compounded micropowder particles, surfactant and resin curing agent, continue to compound and stir for 5-30 minutes to obtain a uniformly dispersed hybrid primer suspension, and after standing for 3-10 minutes to degas, brush or spray directly on the A uniform coating is formed on the surface of the substrate. Adjust the thickness of the coating to 20-200μm by brushing and spraying. Under the condition of 30-80℃, cure for 1-48h to obtain the required semi-cured primer. According to the characteristics of the resin, It can also b...

Embodiment 1

[0040] Add the fluorocarbon resin into the butyl acetate solvent at a weight ratio of 3:1, compound and disperse it under ultrasonic and 500rpm mechanical stirring for 5 minutes until the resin is completely dissolved, and add 0.1% equal mass compounded 100-mesh and 1500 mesh polytetrafluoroethylene and 0.05% curing agent, then add the polyoxyethylamine whose weight is 0.01% relative to the micropowder particles, and continue compounding and stirring for 5 minutes to obtain a uniformly dispersed hybrid primer suspension, and leave it for 3 minutes to remove After drying, spray a 20 μm thick coating on the surface of the glass substrate, and obtain the desired primer after curing at 30°C for 48 hours.

[0041] Add hydrophobic nano-silica particles to ethanol, ultrasonically disperse for 5 minutes, and prepare a 1 mg / mL suspension, then dissolve polyvinylidene fluoride (PVDF) in acetone, stir mechanically at room temperature for 12 hours, and obtain a 0.4 mg / mL solution, mix in e...

Embodiment 2

[0043] Add the hydrophobic silicone resin 2:1 into the acetone solvent, compound and disperse for 20 minutes under ultrasonic and 1000rpm mechanical stirring until the resin is completely dissolved, add 0.3% of 250 mesh and 2000 mesh diamonds, 0.05% dodecyl Sodium sulfate and 10% curing agent, continue to mix and stir for 20 minutes to obtain a uniformly dispersed hybrid primer suspension. After standing for 5 minutes to degas, brush a 10 μm thick coating on the surface of the metal (copper, aluminum, stainless steel) substrate, air Put 10mg / mL hydrophobic nano-silica particles on the surface of the primer after 4min, and bake and cure at 50°C for 24h to obtain a wear-resistant super-hydrophobic composite coating with a water contact angle of 158.5°. The angle is 5.4°( image 3 ).

technical field

[0001] The invention belongs to the field of coating preparation, in particular to a high wear-resistant super-hydrophobic composite coating and a preparation method thereof. Background technique

[0002] The unique super-wetting characteristics of the super-hydrophobic surface make the super-hydrophobic material have self-cleaning, drag reduction, waterproof, anti-fog, anti-ice, heat transfer and other functions. The structure preparation of superhydrophobic materials has become a hot spot in the research of thin film materials, and has broad application prospects in aviation, navigation, energy, construction, electronics, anti-corrosion, sensors, heat transfer and other fields. The characteristics of superhydrophobic are determined by the hydrophobicity and roughness of the substance. Low surface free energy and suitable roughness are two indispensable factors for the preparation of superhydrophobic surfaces.

[0003] At present, the preparation technologi...

Examples

preparation example Construction

[0036] A method for preparing a highly wear-resistant super-hydrophobic composite coating, the steps are:

[0037](1) Preparation and preparation of the primer: Add the hydrophobic resin to the compatible solvent in a certain proportion, and disperse it for 5-30 minutes under the compound conditions of ultrasonic and 500-1500rpm mechanical stirring until the resin is completely dissolved to obtain a resin solution, and then add a certain proportion The compounded micropowder particles, surfactant and resin curing agent, continue to compound and stir for 5-30 minutes to obtain a uniformly dispersed hybrid primer suspension, and after standing for 3-10 minutes to degas, brush or spray directly on the A uniform coating is formed on the surface of the substrate. Adjust the thickness of the coating to 20-200μm by brushing and spraying. Under the condition of 30-80℃, cure for 1-48h to obtain the required semi-cured primer. According to the characteristics of the resin, It can also b...

Embodiment 1

[0040] Add the fluorocarbon resin into the butyl acetate solvent at a weight ratio of 3:1, compound and disperse it under ultrasonic and 500rpm mechanical stirring for 5 minutes until the resin is completely dissolved, and add 0.1% equal mass compounded 100-mesh and 1500 mesh polytetrafluoroethylene and 0.05% curing agent, then add the polyoxyethylamine whose weight is 0.01% relative to the micropowder particles, and continue compounding and stirring for 5 minutes to obtain a uniformly dispersed hybrid primer suspension, and leave it for 3 minutes to remove After drying, spray a 20 μm thick coating on the surface of the glass substrate, and obtain the desired primer after curing at 30°C for 48 hours.

[0041] Add hydrophobic nano-silica particles to ethanol, ultrasonically disperse for 5 minutes, and prepare a 1 mg / mL suspension, then dissolve polyvinylidene fluoride (PVDF) in acetone, stir mechanically at room temperature for 12 hours, and obtain a 0.4 mg / mL solution, mix in e...

Embodiment 2

[0043] Add the hydrophobic silicone resin 2:1 into the acetone solvent, compound and disperse for 20 minutes under ultrasonic and 1000rpm mechanical stirring until the resin is completely dissolved, add 0.3% of 250 mesh and 2000 mesh diamonds, 0.05% dodecyl Sodium sulfate and 10% curing agent, continue to mix and stir for 20 minutes to obtain a uniformly dispersed hybrid primer suspension. After standing for 5 minutes to degas, brush a 10 μm thick coating on the surface of the metal (copper, aluminum, stainless steel) substrate, air Put 10mg / mL hydrophobic nano-silica particles on the surface of the primer after 4min, and bake and cure at 50°C for 24h to obtain a wear-resistant super-hydrophobic composite coating with a water contact angle of 158.5°. The angle is 5.4°( image 3 ).

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