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Preparation method of wear-resistant super-hydrophobic nanometer titania coating

A nano-titanium dioxide and coating technology, which is applied in coatings, epoxy resin coatings, dyed organic silicon compounds, etc., can solve the problems of easy shedding of nanoparticles, poor adhesion between coating layers and internal bonding force, etc. Achieve the effect of improving protection ability, prolonging service life and simple process

Inactive Publication Date: 2016-05-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest problem with this nano-coating is that the interlayer adhesion of the coating, especially the intralayer adhesion, is poor.
Because the coating is only stacked by nanoparticles, when subjected to relatively strong friction, the nanoparticles are prone to fall off

Method used

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  • Preparation method of wear-resistant super-hydrophobic nanometer titania coating
  • Preparation method of wear-resistant super-hydrophobic nanometer titania coating
  • Preparation method of wear-resistant super-hydrophobic nanometer titania coating

Examples

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Effect test

Embodiment 1

[0043] In the present invention, a method for preparing a wear-resistant superhydrophobic nano-titanium dioxide coating specifically comprises the following steps:

[0044] Step 1. Mix the silane coupling agent n-octyltriethoxysilane and ethanol (absolute ethanol) according to the mass ratio of 1:50, and use a temperature-controlled magnetic stirrer to fully heat and stir at 50°C for 2 hours. The stirring rate was 400r / min to obtain a solution;

[0045] Step 2, adding particle diameter to the above solution is rutile nano-titanium dioxide of 25nm, the mass ratio of rutile-type nano-titanium dioxide to ethanol is 0.5:10, and stirring for 1h under the condition of 400r / min with a magnetic stirrer at a stirring rate, so that The nanoparticles are fully contacted with the silane coupling agent, and finally dried at 50°C for 10 hours to obtain superhydrophobic nano-titanium dioxide powder;

[0046] Step 3, mix E-42 epoxy resin and curing agent polyamide according to the ratio of 4...

Embodiment 2

[0053] In the present invention, a method for preparing a wear-resistant superhydrophobic nano-titanium dioxide coating specifically comprises the following steps:

[0054] Step 1. Mix the silane coupling agent vinyltriethoxysilane and ethanol (absolute ethanol) according to the mass ratio of 0.5:50, use a temperature-controlled magnetic stirrer to fully heat and stir at 30°C for 4 hours, and stir The speed is 200r / min, and the solution is obtained;

[0055] Step 2, add the rutile type nano-titanium dioxide that particle diameter is 40nm in above-mentioned solution, the mass ratio of rutile type nano-titanium dioxide and ethanol is 2:10, and be stirred 1h under the condition of 200r / min with magnetic stirrer at stirring rate, make The nanoparticles are fully contacted with the silane coupling agent, and finally dried at 30°C for 8 hours to obtain nano-titanium dioxide powder;

[0056] Step 3, mix E-44 epoxy resin and curing agent ethylenediamine according to the ratio of 1:1,...

Embodiment 3

[0061] The difference from Example 1 is that the silane coupling agent is a mixture of vinyltrimethoxysilane and p-styryltrimethoxysilane, wherein the mass ratio of the two is 1:1.

[0062] Detection: The sample uses a contact angle measuring instrument to measure the contact angle of the final coating, and it is found that the contact angle of water is about 150°, and the rolling angle is less than 5°, which shows that the obtained coating has excellent hydrophobic properties; We use the pull-off method to measure the interlayer adhesion between the coating and the substrate, and find that the adhesion is around 295psi; we use the sandpaper abrasion test to test the wear resistance of the coating, and find that the quality of the coating changes by 100± 10mg and the contact angle of water can still reach 150°, and the rolling angle is less than 5°, which shows that the prepared coating has excellent wear resistance.

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Abstract

The invention discloses a preparation method of a wear-resistant super-hydrophobic nanometer titania coating. The preparation method includes firstly, dissolving silane coupling agent in ethyl alcohol and then heating and stirring to react to obtain a solution; secondly, adding nanometer titania into the solution and then stirring and drying to obtain hydrophobic nanometer titania powder; thirdly, mixing a certain quantity of epoxy resin with hardener while adding in diluting agent to dilute the resin completely to obtain a diluted liquid, adding the hydrophobic nanometer titania powder into the diluted liquid, then subjecting the mixture to ultrasonic dispersion with complete stirring to allow the nanometer titania to contact with the resin completely so as to obtain a suspension liquid; and finally, coating the suspension liquid on a base material and drying completely so as to obtain the wear-resistant super-hydrophobic nanometer titania coating. Compared with the pure hydrophobic nanometer coating, the wear-resistant super-hydrophobic nanometer titania coating prepared by the method has the advantages that coating hardness is improved greatly, and super-hydrophobic property of the coating is guaranteed while interlayer adhesion and inner binding force of the nanometer coating are improved greatly.

Description

technical field [0001] The invention relates to a preparation method of a coating, in particular to a preparation method of a wear-resistant superhydrophobic nano-titanium dioxide coating. Background technique [0002] At present, coating protection is mostly used for metal corrosion, and the main component of the coating currently used is still resinous substances. At present, the development of resin is very fast, and various resins with superior performance are constantly emerging, which prolongs the service life of the coating to a certain extent. Bubbling phenomenon, in the environment with severe ultraviolet radiation, the resin is prone to pulverization, etc. In recent years, superhydrophobic materials have attracted great attention of researchers due to their unique properties. Superhydrophobic materials have a strong repulsion to water due to their low surface free energy. Therefore, it has broad application prospects in self-cleaning, drag reduction, waterproof, ...

Claims

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Application Information

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IPC IPC(8): C09D163/02C09D7/12C09C1/36C09C3/12
CPCC09D7/61C09D163/00C08K3/22C08K9/06C08K13/06C09C1/3684C09C3/12C08K2003/2241C08K2201/011
Inventor 王秀民孙阳超王洪兵李春玲王培孙霜青胡松青
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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