Wear-resistant super-hydrophobic coating layer and preparation method thereof

A super-hydrophobic coating and hydrophobic technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of complex operation, harsh preparation conditions, and cumbersome preparation methods, and achieve simple preparation process, excellent wear resistance, low cost effect

Inactive Publication Date: 2020-03-06
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires the use of toxic acetone as a solvent, and the operation is complicated, requiring multiple layers of coating, which is not conducive to practical application
Patent CN106118422A discloses a nano-SiO 2 Composite polysiloxane-modified waterborne terpene-based EP / PU superhydrophobic self-cleaning polymer and its preparation method, but this method requires high curing temperature and needs to be cured at 120°C, which is not conducive to large-scale production
[0004] Most of the known wear-resistant superhydrophobic coating methods have problems such as harsh preparation conditions, cumbersome preparation methods, toxicity and hazards, so the method of simple preparation process, mild conditions, green environmental protection, low cost, and long-term preservation of the dispersion liquid is adopted. The preparation of wear-resistant superhydrophobic coatings is related to the development and application prospects of superhydrophobic technology

Method used

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  • Wear-resistant super-hydrophobic coating layer and preparation method thereof
  • Wear-resistant super-hydrophobic coating layer and preparation method thereof
  • Wear-resistant super-hydrophobic coating layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Mix 12.4mL tetraethyl orthosilicate and 97.2mL absolute ethanol, reflux and stir at 60°C for 10min, then add dropwise a mixture of 11.8mL ammonia water and 1mL deionized water, and reflux at 60°C Stir for 2h, then add 5.5mL of triethoxymethylsilane dropwise, continue to reflux at 60°C for 1h, then age at room temperature for 24h, and then place it in an oven at 60°C for 2 days to completely evaporate the solvent to obtain hydrophobic Silica nanoparticles;

[0029] (2) Add 1 g of hydrophobic silica nanoparticles to 3.95 g of absolute ethanol, and stir vigorously at 60°C for 1 hour to disperse the hydrophobic silica nanoparticles evenly in absolute ethanol to obtain hydrophobic silica nanoparticles Particle dispersion; mix 1g of one-component water-based polyurethane with 1g of water evenly to obtain a one-component water-based polyurethane aqueous solution;

[0030] (3) After mixing 1 part of the one-component water-based polyurethane aqueous solution in step (2) an...

Embodiment 2

[0033] (1) Mix 37.2mL tetraethyl orthosilicate and 291.6mL absolute ethanol, reflux and stir at 60°C for 10min, then add dropwise a mixture of 35.4mL ammonia water and 3mL deionized water, and reflux at 60°C Stir for 2h, then add 16.5mL of triethoxymethylsilane dropwise, continue to reflux at 60°C for 1h, then age at room temperature for 24h, and then place it in an oven at 60°C for 3 days to completely evaporate the solvent to obtain a hydrophobic Silica nanoparticles;

[0034] (2) Add 5g of hydrophobic silica nanoparticles to 19.75g of absolute ethanol, and stir vigorously at 60°C for 1h to disperse the hydrophobic silica nanoparticles evenly in absolute ethanol to obtain hydrophobic silica nanoparticles Particle dispersion; 5g of one-component water-based polyurethane is uniformly mixed with 5g of water to obtain a one-component water-based polyurethane aqueous solution;

[0035](3) After mixing 1 part of the one-component water-based polyurethane aqueous solution in step ...

Embodiment 3

[0038] (1) Mix 12.4mL tetraethyl orthosilicate and 97.2mL absolute ethanol, reflux and stir at 60°C for 10min, then add dropwise a mixture of 11.8mL ammonia water and 1mL deionized water, and reflux at 60°C Stir for 2h, then add 5.5mL of triethoxymethylsilane dropwise, continue to reflux at 60°C for 1h, then age at room temperature for 24h, and then place it in an oven at 60°C for 2 days to completely evaporate the solvent to obtain hydrophobic Silica nanoparticles;

[0039] (2) Add 0.8g of hydrophobic silica nanoparticles to 3.95g of absolute ethanol, and stir vigorously at 60°C for 1h to disperse the hydrophobic silica nanoparticles evenly in absolute ethanol to obtain hydrophobic silica Nanoparticle dispersion; 1g of one-component water-based polyurethane is uniformly mixed with 1g of water to obtain a one-component water-based polyurethane aqueous solution;

[0040] (3) After mixing 1 part of the one-component water-based polyurethane aqueous solution in step (2) and 1 pa...

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Abstract

The invention discloses a wear-resistant super-hydrophobic coating layer and a preparation method thereof. An absolute ethyl alcohol dispersion liquid of hydrophobic silicon dioxide nanoparticles is uniformly mixed with a single-component waterborne polyurethane aqueous solution to obtain a hydrophobic silicon dioxide nanoparticle / single-component waterborne polyurethane dispersion liquid, then the dispersion liquid is brushed or sprayed on a base material, and cured at room temperature for 5 h to obtain the wear-resistant super-hydrophobic coating layer. The prepared super-hydrophobic aqueoussolution can be stored in a sealed manner for a long time, can be coated as required, can be cured at room temperature, and is quite convenient. The base material can be any one of glass, metals, plastics, ceramics and stone. The static water contact angle of the surface of the wear-resistant super-hydrophobic coating layer is 151 DEG-153 DEG, the rolling angle of the surface of the wear-resistant super-hydrophobic coating layer is 4 DEG-6 DEG, and the wear-resistant super-hydrophobic coating layer can rub 1800 cm on 320-mesh abrasive paper along a straight line under the pressure of 2500 Pa.The method has the advantages of being simple in preparation process, convenient to operate, green, environmentally friendly, low in cost and the like, has high practical value and application prospects, and can be applied to various fields.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic materials, and in particular relates to a preparation method of a wear-resistant superhydrophobic coating. Background technique [0002] Superhydrophobic surfaces with high water contact angles greater than 150° and low rolling angles less than 10° have attracted extensive attention in many applications. At present, there are many ways to successfully artificially prepare superhydrophobic coatings, but in order to make superhydrophobic coatings widely practical, it is necessary to overcome a fatal flaw of superhydrophobic coatings, that is, the mechanical stability is very limited and cannot resist mechanical touch. [0003] In order to solve the mechanical strength problem of superhydrophobic coatings, there are many methods for preparing wear-resistant superhydrophobic coatings at present, such as patent CN106675339A, which discloses a simple preparation method of low-cost high-strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/20
CPCC08K2201/011C09D175/04C09D7/20C09D7/61C08K3/36
Inventor 李湘祁王宗明张嘉胜
Owner FUZHOU UNIV
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