A self-healing coating with photothermal effect and its preparation and application method

A technology of photothermal effect and application method, which is applied in the direction of coating, anti-corrosion coating, epoxy resin coating, etc., can solve the problems of increasing coating preparation cost, etc., and achieve low production cost, recovery protection ability, corrosion resistance and self-healing good performance effect

Active Publication Date: 2020-09-11
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing reports have achieved photothermal self-healing by adding graphene, carbon nanotubes, gold nanoparticles, etc. to the coating, but the addition of these substances will significantly increase the preparation cost of the coating, so it is urgent to develop new low-cost , high-performance photothermal materials, and apply them to the field of photothermal self-healing coatings

Method used

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  • A self-healing coating with photothermal effect and its preparation and application method
  • A self-healing coating with photothermal effect and its preparation and application method
  • A self-healing coating with photothermal effect and its preparation and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Polish the stainless steel sheet with sandpaper, then ultrasonically clean it with acetone, alcohol, and deionized water in sequence and dry it;

[0018] 2. Disperse titanium nitride nanoparticles with a particle size of 20nm in tetrahydrofuran: take 0.006g of nano-titanium nitride and add it to 2g of tetrahydrofuran, and stir magnetically for 30min at a speed of 600rpm;

[0019] 3. Dissolve 2g of polyacrylic acid in 6g of tetrahydrofuran, and dissolve it at 80°C and 400rpm to form a homogeneous solution;

[0020] 4. Mix titanium nitride with polyacrylic acid solution, and disperse evenly at 90°C and 800rpm for 20 minutes to ensure that the mass fraction of titanium nitride solvent after volatilization is 0.3%;

[0021] 5. Apply the titanium nitride-polyacrylic acid composite solution evenly on the surface of the stainless steel sheet by the bar coating method;

[0022] 6. Dry in an oven at 80°C for 12 hours, and the thickness of the coating after curing is 50 μm. ...

Embodiment 2

[0027] 1. Polish the aluminum alloy sheet with sandpaper, then ultrasonically clean it with acetone, alcohol, and deionized water in sequence, and dry it;

[0028] 2. Disperse titanium nitride nanoparticles with a particle size of 30nm in tetrahydrofuran: take 0.06g of nano-titanium nitride and add it to 2g of tetrahydrofuran, and stir magnetically for 30min at a speed of 600rpm;

[0029] 3.3g of polystyrene powder was dissolved in 50mL of tetrahydrofuran for use;

[0030] 4. Mix the titanium nitride and polystyrene solution, and stir at 70rpm to reach a certain viscosity, and ensure that the mass fraction of the titanium nitride solvent after volatilization is 2.0%;

[0031] 5. Spray the titanium nitride-polystyrene composite solution on the surface of the aluminum alloy sheet, and use a spray gun to spray the composite solution evenly on the aluminum alloy sheet at 0.6 MPa, and the nozzle is 10 to 15 cm from the surface of the sample;

[0032] 6. Dry in an oven at 60°C for ...

Embodiment 3

[0036] 1. Grind the carbon steel sheet with sandpaper, then ultrasonically clean it with acetone, alcohol, and deionized water in sequence, and dry it;

[0037] 2. Disperse titanium nitride nanoparticles with a particle size of 80nm in N,N-dimethylformamide: take 0.08g of nano-titanium nitride and add it to 1gN,N-dimethylformamide, at a speed of 600rpm Next, magnetically stir for 30min;

[0038] 3. Dissolve 2g of polyurethane in 7g of N,N-dimethylformamide, and dissolve it into a homogeneous solution at 90°C and 800rpm;

[0039] 4. Mix titanium nitride and polyurethane solution, and disperse evenly at 90°C and 800rpm for 20 minutes to ensure that the mass fraction of titanium nitride solvent is 4.0% after volatilization;

[0040] 5. Spin-coat the titanium nitride-polyurethane composite solution on the surface of the carbon steel sheet at a speed of 300rpm for 20s;

[0041] 6. Curing in an oven at 55°C for 24 hours, the coating thickness after curing is 100μm.

[0042]7. Use...

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Abstract

The invention discloses a self-healing coating with the photo-thermal effect and a preparation and application method thereof. The self-healing coating is characterized by comprising titanium nitridenanoparticles with a mass fraction of 0.3%-5.0% and the balance a resin. The coating is prepared by the following method: first uniformly dispersing titanium nitride nanoparticles in the resin, then performing spin coating, spraying or knife coating on the surface of a substrate, and performing curing to obtain the self-healing coating with the photo-thermal effect. The titanium nitride-resin composite coating prepared by the method has good corrosion resistance; and when the surface of the coating is damaged, nano titanium nitride excites plasmon resonance under illumination, and the light energy can be directly converted into the heat energy, so that the organic substance is melted and the damage interface is healed, and the protective effect of the coating on the substrate is restored.The preparation process is simple, the production cost is low, the corrosion resistance and the self-healing property of the coating are good, and the self-healing can be repeated for many times, so that the self-healing coating has broad application prospects.

Description

technical field [0001] The invention relates to a self-repairing coating with photothermal effect and a preparation and application method thereof, belonging to the field of corrosion-resistant coating materials. Background technique [0002] As a physical shield, coating protection can effectively inhibit the occurrence of corrosion on the surface of metal substrates, and it is one of the most effective means of metal corrosion protection. However, the coating will inevitably be damaged and cracked during the service process, resulting in a significant decline in anti-corrosion performance. Therefore, there is an urgent need to develop smart coatings with self-healing damage functions. The self-healing coating can promote the melting of the coating in the damaged area and heal the damaged interface through external stimuli such as light, electricity, heat, and magnetism. This method can repair large-scale surface damage and is conducive to restoring the physical and chemic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D133/02C09D125/06C09D129/04C09D163/00C09D5/08
CPCC08K2201/011C09D5/08C09D125/06C09D129/04C09D133/02C09D163/00C09D175/04C08K3/28
Inventor 马菱薇王金科张达威
Owner UNIV OF SCI & TECH BEIJING
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