Photoresponse self-cleaning coating and preparation method thereof

A self-cleaning, light-responsive technology, applied in the field of coatings, can solve the problem of limited light-response range and achieve the effect of improving photocatalytic activity

Inactive Publication Date: 2020-05-12
SHENYANG SHUNFENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a new type of non-metallic photocatalytic material, compared with TiO 2 The material is non-toxic and non-polluting, and is more suitable for indoor air pollution control and organic degradation, but g-C 3 N 4 Limited range of photoresponse

Method used

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  • Photoresponse self-cleaning coating and preparation method thereof
  • Photoresponse self-cleaning coating and preparation method thereof
  • Photoresponse self-cleaning coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Metal modified g-C 3 N 4 :

[0034] 1) Prepare 10ml (0.5wt%) CaCl 2 The solution was put into 20g melamine sample, stirred evenly and heated at 60℃ to evaporate the water;

[0035] 2) Weigh 10g of the processed sample at room temperature, add it to the crucible and put it into the muffle furnace at a temperature rise rate of 5℃·min -1 Heated to 530℃, kept at this temperature for 3h, and then naturally cooled to room temperature to obtain calcium metal doped and modified g-C 3 N 4 powder;

[0036] (2) Preparation of composite coating:

[0037] 1) Take 200 parts of water-based epoxy resin and 200 parts of water;

[0038] 2) Take 20 parts of calcium metal doped and modified g-C 3 N 4 Add to the above resin system and disperse in a ball mill for 2 hours;

[0039] 3) Take 20 parts of water-based curing agent and 50 parts of water and mix evenly; mix the mother liquor of the water-based epoxy composite paint and the diluted water-based curing agent in a ratio of 3:1 to coat the subs...

Embodiment 2

[0042] (1) Metal modified g-C 3 N 4 :

[0043] 1) Prepare 15ml (0.5wt%) CaCl 2 The solution was put into 30g melamine sample, stirred evenly and heated at 60℃ to evaporate the water;

[0044] 2) Weigh 20g of the processed sample at room temperature, add it to the crucible and put it into the muffle furnace at a temperature rise rate of 10℃·min -1 Heat to 550℃, keep it at this temperature for 4h, and then cool to room temperature naturally to obtain calcium metal doped and modified g-C 3 N 4 powder;

[0045] (2) Preparation of composite coating:

[0046] 1) Take 250 parts of water-based epoxy resin and 250 parts of water;

[0047] 2) Take 30 parts of calcium metal doped and modified g-C 3 N 4 Add to the above resin system and disperse in a ball mill for 2 hours;

[0048] 3) Take 30 parts of water-based curing agent and 80 parts of water and mix uniformly; mix the mother liquor of the water-based epoxy composite paint and the diluted water-based curing agent in a ratio of 4:1 to coat the s...

Embodiment 3

[0051] (1) Metal modified g-C 3 N 4 :

[0052] 1) Prepare 20ml (0.5wt%) CaCl 2 The solution was put into 40g melamine sample, stirred evenly and heated at 60℃ to evaporate the water;

[0053] 2) Weigh 30g of the processed sample at room temperature, add it to the crucible and put it into the muffle furnace at a temperature rise rate of 20℃·min -1 Heat to 600℃, keep it at this temperature for 6h and then cool to room temperature naturally to obtain calcium metal doped and modified g-C 3 N 4 powder;

[0054] (2) Preparation of composite coating:

[0055] 1) Take 200 parts of water-based epoxy resin and 300 parts of water;

[0056] 2) Take 40 parts of calcium metal doped and modified g-C 3 N 4 Add to the above resin system and disperse in a ball mill for 2 hours;

[0057] 3) Take 40 parts of water-based curing agent and 100 parts of water and mix evenly; mix the mother liquor of the water-based epoxy composite paint and the diluted water-based curing agent in a ratio of 5:1 to coat the subs...

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Abstract

The invention provides a photoresponse self-cleaning coating which is characterized by being prepared from a component A and a component B at the weight ratio of 1:3-5. The component A is prepared from the following raw materials (by weight): 20 to 40 parts of modified g-C3N4, 200 to 300 parts of water and 200 to 300 parts of waterborne epoxy resin; the component B is prepared from the following raw materials (by weight): 20-40 parts of a water-based curing agent and 50-100 parts of water; the modified g-C3N4 is obtained by carrying out doping modification on a carbon-containing nitrogen-richprecursor by using metal. According to the preparation method, the photoresponse self-cleaning coating is prepared by mixing metal modified g-C3N4 and waterborne epoxy resin, and compared with traditional TiO2, the photoresponse self-cleaning coating is completely non-toxic and pollution-free and is more suitable for indoor use; according to the invention, metal-modified g-C3N4 is adopted as a filler, and the photocatalytic activity of the g-C3N4 modified through metal modification is greatly improved compared with photocatalytic activity of unmodified g-C3N4.

Description

Technical field [0001] The invention belongs to the technical field of coatings, and specifically relates to a light-responsive self-cleaning coating and a preparation method thereof. Background technique [0002] Water-based epoxy coatings are widely used due to environmental protection, especially indoor and outdoor and decorative materials. However, due to the inevitable air pollution or improper use during the use of organic matter, the color of the coating fades and it is difficult to clean, which ultimately leads to the failure of the coating. use. [0003] At present, the common light-responsive self-cleaning coatings on the market are often made of titanium dioxide (TiO 2 ), zinc oxide (ZnO), cadmium sulfide (CdS) and other oxide sulfides are added as photocatalysts into the coating. However, since zinc oxide, cadmium sulfide and other metal oxides and sulfides are not stable in use, some of the metal ions are eluted and have certain biological toxicity, so they are rarely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/61
CPCC09D163/00C09D7/61C08K3/28
Inventor 李娜葛晶史胜南徐秀志于帅
Owner SHENYANG SHUNFENG NEW MATERIAL CO LTD
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