Preparation method of normal-temperature curing wear-resistant anticorrosive super-hydrophobic coating

A super-hydrophobic coating, room temperature curing technology, applied in the field of materials, can solve the problems such as easy to produce tiny cracks, achieve excellent self-cleaning, reduce the effect of preparation costs

Inactive Publication Date: 2022-01-11
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, epoxy resin is brittle after curing,...

Method used

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  • Preparation method of normal-temperature curing wear-resistant anticorrosive super-hydrophobic coating
  • Preparation method of normal-temperature curing wear-resistant anticorrosive super-hydrophobic coating
  • Preparation method of normal-temperature curing wear-resistant anticorrosive super-hydrophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] CNTs (0.05g) and POTS (0.05g) were dispersed in ethyl acetate (5g) and stirred for 1 hour. Then epoxy resin E51, curing agent D230, SiO 2 Airgel and ethyl acetate were added to the above solution at a mass ratio of 12:4:1:100. To achieve uniform dispersion, the mixture was sonicated for 15 minutes and stirred for another 30 minutes. The final solution was sprayed on the steel plate surface and cured at room temperature for 10 hours to form superhydrophobic EP-SiO 2 -CNTs-POTS coating. See Table 1.

Embodiment 2

[0030] CNTs (0.06g) and POTS (0.06g) were dispersed in ethyl acetate (5g) and stirred for 1 hour. Then epoxy resin E51, curing agent D230, SiO 2 Airgel and ethyl acetate were added to the above solution at a mass ratio of 12:4:1:100. To achieve uniform dispersion, the mixture was sonicated for 15 minutes and stirred for another 30 minutes. The final solution was sprayed on the steel plate surface and cured at room temperature for 10 hours to form superhydrophobic EP-SiO 2 -CNTs-POTS coating. See Table 1.

Embodiment 3

[0032] CNTs (0.07g) and POTS (0.07g) were dispersed in ethyl acetate (5g) and stirred for 1 hour. Then epoxy resin E51, curing agent D230, SiO 2 Airgel and ethyl acetate were added to the above solution at a mass ratio of 12:4:1:100. To achieve uniform dispersion, the mixture was sonicated for 15 minutes and stirred for another 30 minutes. The final solution was sprayed on the steel plate surface and cured at room temperature for 10 hours to form superhydrophobic EP-SiO 2 -CNTs-POTS coating. See Table 1.

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Abstract

The invention relates to a preparation method of a normal-temperature cured wear-resistant anticorrosive super-hydrophobic coating, which comprises the following steps: (1) dispersing multi-walled carbon nanotubes and 1H,1H,2H,2H-perfluorooctyltriethoxysilane in ethyl acetate, and conducting stirring to obtain a mixed solution; (2) adding epoxy resin, a curing agent, SiO2 aerogel and ethyl acetate into the mixed solution in proportion; (3) carrying out ultrasonic treatment on the mixed solution in the step (2), and conducting stirring to obtain a spraying solution; (4) removing an oxide layer and other stains on the surface of the steel; (5) enabling the included angle between a spray gun and the sprayed steel to be 90 degrees and the distance between the foremost end of the spray gun and the sprayed steel to be 5-50 mm, and conducting spraying for 30 s; and (6) conducting drying at normal temperature in a ventilated place after spraying. The super-hydrophobic coating obtained by the invention has excellent self-cleaning, mechanical and self-repairing properties; a double-layer structure consisting of a surface micro-nano structure and a bottom porous structure is successfully constructed on the surface of the coating; and a spraying mode is used for operation, so that the cost is reduced.

Description

technical field [0001] The invention belongs to the field of material technology, in particular to material coating technology. Background technique [0002] Steel structure prefabricated buildings are a new type of construction, most of the materials can be recycled and degraded, and will not generate a lot of garbage, which meets the requirements of green buildings. However, steel structure prefabricated buildings have high requirements for anti-corrosion due to the large amount of steel used. In order to make the steel meet the 70-year service requirement, it is necessary to carry out anti-corrosion treatment on the steel. [0003] In the corrosion of iron and steel materials, more than 90% of them belong to electrochemical corrosion except for very few cases of chemical or physical corrosion from the perspective of mechanism. There are three necessary factors for electrochemical corrosion: anode, cathode and corrosion medium. Water is the most common medium. Therefore, ...

Claims

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Application Information

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IPC IPC(8): C09D163/02C09D5/08C09D7/62
CPCC09D163/00C09D5/08C09D7/62C09D7/70C08K2201/011C08K9/06C08K3/041C08K7/26
Inventor 李长全毛天赐毛非非薛智烨徐国强厉子昂王琛
Owner JIANGSU UNIV OF TECH
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