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Preparation method and repair method of self-healing graphene/thermoplastic resin coating

A technology of thermoplastic resin and repair method, which is applied in coatings, polyurea/polyurethane coatings, polyamide coatings, etc., can solve the problems of cumbersome repair methods, complicated self-repair coating preparation, poor self-repair effect, etc., and achieve repair means Simple, low cost, low energy consumption effect

Active Publication Date: 2020-09-08
厦门奈克斯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For above-mentioned defective of prior art, the present invention provides a kind of preparation method of self-repairing graphene / thermoplastic resin coating, the present invention also provides a kind of repairing method of self-repairing graphene / thermoplastic resin coating, solve self-repairing Complex coating preparation, cumbersome repair methods, and poor self-repair effect

Method used

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  • Preparation method and repair method of self-healing graphene/thermoplastic resin coating
  • Preparation method and repair method of self-healing graphene/thermoplastic resin coating
  • Preparation method and repair method of self-healing graphene/thermoplastic resin coating

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Embodiment 1

[0016] Mix the polyurethane solution with a concentration of 20wt% and graphene in proportion, the amount of graphene added is 0.05wt% of the polyurethane, mix evenly with high-speed mechanical stirring for 2 hours, vacuumize for 25 minutes to remove the bubbles in the mixed solution, and then use the obtained mixed solution with A wire bar coater of 50 μm to 200 μm is coated on the substrate, and cured at 60°C to 80°C for 1 hour to obtain a polyurethane / graphene composite coating. The prepared coating is as follows figure 1 shown. Adopt #1500 sandpaper to polish polyurethane / graphene composite coating, obtain such as figure 2 For the scratched polyurethane / graphene composite coating shown, when the coating surface is damaged, use a wavelength of 700nm and a light intensity of 50w / cm 2 Laser irradiation to repair the scratched area for 15s, and the polyurethane / graphene composite coating after partial repair such as image 3 shown.

Embodiment 2

[0018] Mix the polyurethane solution with a concentration of 10wt% and graphene in proportion, the amount of graphene added is 0.07wt% of the polyurethane, mix evenly with high-speed mechanical stirring for 1 hour, vacuumize for 20 minutes to remove the bubbles in the mixed solution, and then use the obtained mixed solution with Coat the substrate with a wire bar coater of 50 μm to 200 μm, and cure at 60°C to 80°C for 1.5 hours to obtain a polyurethane / graphene composite coating. When the surface of the coating is damaged, use a wavelength of 800nm ​​and 200w / cm 2 The laser irradiation repairs the scratched area for 10s.

Embodiment 3

[0020] Mix the polyurethane solution with a concentration of 30wt% and graphene in proportion, the amount of graphene added is 0.1wt% of the polyurethane, mix evenly with high-speed mechanical stirring for 3 hours, vacuumize for 25 minutes to remove the bubbles in the mixed solution, and then use the obtained mixed solution with Coat the substrate with a wire bar coater of 50 μm to 200 μm, and cure it at 60°C to 80°C for 2 hours to obtain a polyurethane / graphene composite coating. When the surface of the coating is damaged, use a wavelength of 900nm and a light intensity of 500w / cm 2 The laser irradiation repairs the scratched area for 3s.

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Abstract

The invention discloses a preparation method of a self-repairing graphene / thermoplastic resin coating layer. The preparation method comprises the following steps of mixing a thermoplastic resin solution with graphene, mechanically stirring for 1 hour to 3 hours at high speed, uniformly mixing, vacuuming, removing air foams in a mixed solution, coating a substrate with the obtained mixed solution,and curing, so as to obtain the self-repairing graphene / thermoplastic resin coating layer, wherein the ratio of graphene in the thermoplastic resin is 0.05wt% to 0.1wt%. The invention discloses a repairing method of the self-repairing graphene / thermoplastic resin coating layer. The repairing method comprises the following step of radiating the self-repairing graphene / thermoplastic resin coating layer by laser. The self-repairing graphene / thermoplastic resin coating layer and the repairing method have the characteristics that the energy consumption in the repairing process is low, and the costis low; the repairing means are simple and economic, and the industrialization is easy to realize.

Description

technical field [0001] The invention relates to a preparation method and repair method of a thermoplastic resin coating, in particular to a preparation method and a repair method of a self-repairing graphene / thermoplastic resin coating. Background technique [0002] Polymer coatings are widely used for decoration and surface protection, and it has become an indispensable element in industrial production and life. Polymer coatings not only provide a smooth surface, but also act as a barrier between the base material and corrosive media. However, after a long period of use, the coating will produce micro-cracks of different scales due to weathering and wear. However, at the current level of technology, it is impossible to prepare a high-strength coating that can resist all external damage, so it is inevitable to repair the coating, and self-healing coatings become the key to solving this problem. Self-healing coating materials include reversible polymers, shape memory materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/61C09D123/12C09D125/06C09D177/00
CPCC09D7/61C09D123/12C09D125/06C09D175/04C09D177/00C08K3/042
Inventor 曹振兴陈奠宇董鉴锐张兴权秦余杨罗铭左明明袁凤
Owner 厦门奈克斯科技有限公司