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Super-hydrophobic composite anti-corrosion coating as well as construction method and application thereof

A super-hydrophobic and anti-corrosion technology, used in anti-corrosion coatings, coatings, metal material coating processes, etc., can solve the problems of poor binding force, low introduction of inorganic nanoparticles, poor anti-corrosion effect, etc., to enhance the binding force. , prolong the diffusion path and time, and improve the effect of anti-corrosion performance

Pending Publication Date: 2022-07-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a superhydrophobic composite anti-corrosion coating and its construction method and application, to solve the problem that the introduction of inorganic nanoparticles is less and the binding force between organic polymers is weaker. Poor, poor anti-corrosion effect

Method used

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  • Super-hydrophobic composite anti-corrosion coating as well as construction method and application thereof
  • Super-hydrophobic composite anti-corrosion coating as well as construction method and application thereof
  • Super-hydrophobic composite anti-corrosion coating as well as construction method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Magnetically stir 0.28g of silane coupling agent KH-550 and 5g of absolute ethanol for 0.5h until the mixture is uniform. After that, 0.05 g ZnPA@ZIF-8 / PDA-MoS was added to the above mixed solution under ice bath condition 2 The nanocomposite materials were sonicated in an ultrasonic cell pulverizer for 5 min, then transferred to an ultrasonic cleaner for 20 min of sonication, magnetically stirred for 20 h after the end, washed and dried to obtain superhydrophobic ZnPA@ZIF-8 / PDA-MoS 2 Nanocomposites.

[0037] (2) Using the layer-by-layer spraying method, firstly, 1.0g of polyacrylate emulsion was evenly sprayed on the surface of the tinplate metal substrate after polishing with 800-mesh sandpaper, and dried and cured in a vacuum oven at 85°C for 5min; then 0.01g of triethylenetetramine was added. The cross-linking agent was mixed with 3 g of acetone uniformly, and then sprayed on the surface of the above coating; finally, 0.10 g of superhydrophobic ZnPA@ZIF-8 / PDA-M...

Embodiment 2

[0039] (1) Magnetically stir 0.30 g of silane coupling agent KH-570 and 7 g of absolute ethanol for 0.6 h until the mixture is uniform. After that, 0.07 g ZnPA@ZIF-8 / PDA-MoS was added to the above mixed solution under ice bath condition 2 The nanocomposites were sonicated in an ultrasonic cell pulverizer for 7 min, then transferred to an ultrasonic cleaner for 24 min, and then magnetically stirred for 22 h, washed and dried to obtain superhydrophobic ZnPA@ZIF-8 / PDA-MoS 2 Nanocomposites.

[0040] (2) Using the layer-by-layer spraying method, firstly, 1.1g of polyacrylate emulsion was evenly sprayed on the surface of the tinplate metal substrate polished with 800-mesh sandpaper, and dried and cured in a vacuum oven at 85°C for 7min; then 0.02g of aziridine was cross-linked Mixed with 4 g of anhydrous ethanol and sprayed on the surface of the above coating; finally, 0.12 g of superhydrophobic ZnPA@ZIF-8 / PDA-MoS 2 The nanocomposite was dispersed in 9g absolute ethanol for 36min ...

Embodiment 3

[0042] (1) Magnetically stir 0.33 g of hexamethyldisilazane and 9 g of anhydrous ethanol for 0.8 h until the mixture is uniform. After that, 0.09 g ZnPA@ZIF-8 / PDA-MoS was added to the above mixed solution under ice bath condition 2 The nanocomposite was sonicated in an ultrasonic cell pulverizer for 9 min, then transferred to an ultrasonic cleaner for 28 min, and then magnetically stirred for 24 h, washed and dried to obtain superhydrophobic ZnPA@ZIF-8 / PDA-MoS 2 Nanocomposites.

[0043] (2) Using the layer-by-layer spraying method, firstly, 1.2g of polyurethane emulsion was evenly sprayed on the surface of the tinplate metal substrate polished with 800-mesh sandpaper, and dried and cured in a vacuum oven at 85°C for 9min; then 0.03g of hexahydrophthalic anhydride was sprayed The cross-linking agent was mixed with 5 g of anhydrous ethanol uniformly, and then sprayed on the surface of the above coating; finally, 0.14 g of superhydrophobic ZnPA@ZIF-8 / PDA-MoS was added. 2 The na...

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Abstract

The invention discloses a construction method of a super-hydrophobic composite anti-corrosion coating. According to the construction method, a modifier is adopted to carry out super-hydrophobic modification on a ZnPA (at) ZIF-8 / PDA-MoS2 nano composite material to prepare the super-hydrophobic ZnPA (at) ZIF-8 / PDA-MoS2 nano composite material. A film forming substance, a cross-linking agent and the super-hydrophobic ZnPA ZIF-8 / PDA-MoS2 nano composite material are sequentially sprayed on the surface of a metal matrix through a layer-by-layer spraying method, the super-hydrophobic composite anti-corrosion coating is obtained, and the coating can greatly improve the anti-corrosion performance of the metal matrix. Firstly, the super-hydrophobic ZnPA ZIF-8 / PDA-MoS2 nano composite material is located on the top layer of the coating, permeation of water molecules in a corrosive environment can be isolated, and the infiltration capacity of the water molecules in the coating is greatly weakened; secondly, MoS2 in the super-hydrophobic ZnPA (at) ZIF-8 / PDA-MoS2 nano composite material can prolong the diffusion path and time of a corrosion medium in the coating, zinc phytate and 2-methylimidazole in ZnPA (at) ZIF-8 nano particles can exert the self-repairing performance, and the corrosion rate of metal is slowed down; and finally, the binding force between the film forming matter and the super-hydrophobic ZnPA ZIF-8 / PDA-MoS2 nano composite material is enhanced by utilizing a cross-linking agent, and the service life of the composite coating is prolonged.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and in particular relates to a super-hydrophobic composite anti-corrosion coating and a construction method and application thereof. Background technique [0002] Metal corrosion has caused huge economic losses and environmental pollution, and even threatened human health and safety. According to statistics, about 20% of metal materials in the world cannot be recycled due to corrosion every year. Therefore, it is a top priority for countries and the metal industry to find a construction method for anti-corrosion coatings that can slow down metal corrosion. [0003] Among existing researches, organic-inorganic composite coatings are the current research hotspot. Usually, physical blending method or chemical in-situ polymerization method is used to use organic polymer as film-forming material and inorganic nanoparticles as filler to synergistically improve the anti-corrosion perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D187/00C09D5/08C09D7/62C09D7/63C09D5/00C23C26/00B05D1/38B05D5/00B05D7/00B05D7/14
CPCC09D187/00C09D5/08C09D7/62C09D7/63C09D5/00C23C26/00B05D7/14B05D5/00B05D7/544B05D7/546B05D1/38C08K2003/3009C23C2222/20C08K9/08C08K3/30
Inventor 鲍艳朱孝锋魏艳敏付娆刘超张文博祝茜
Owner SHAANXI UNIV OF SCI & TECH
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