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Preparation method of multifunctional super-hydrophobic coating with mechanical stability

A technology of super-hydrophobic coating and mechanical stability, applied in coatings, antifouling/underwater coatings, and biocide-containing paints, etc. Effects of hydrophobic properties, improved mechanical stability and bacteriostatic ability and photocatalytic efficiency

Pending Publication Date: 2021-07-16
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to solve the problem that the surface exposed to the air is easily stained, and after being stained and growing mold, it loses its original function and causes economic losses.

Method used

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  • Preparation method of multifunctional super-hydrophobic coating with mechanical stability
  • Preparation method of multifunctional super-hydrophobic coating with mechanical stability

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specific Embodiment approach 1

[0016] Embodiment 1: The preparation method of a multifunctional superhydrophobic coating with mechanical stability in this embodiment is carried out according to the following steps:

[0017] 1. Dissolve zinc nitrate and potassium hydroxide in deionized water, slowly add the zinc nitrate solution dropwise to the potassium hydroxide solution, stir magnetically for 30-60min, and then transfer the solution to a Teflon reactor at 80-100℃ The reaction was carried out for four hours, and the obtained white powder was centrifuged and dried;

[0018] 2. Add 2-5g of the powder in step 1 to the mixed solution of absolute ethanol and tridecafluorooctyltriethoxysilane, stir magnetically for four hours, and finally dry the modified zinc oxide particles for later use ;

[0019] 3. Add polydimethylsiloxane and n-hexane into the beaker in a certain proportion and stir well, then add the modified zinc oxide into the mixture for ultrasonic dispersion for 30-50 minutes, and finally spray with ...

specific Embodiment approach 2

[0020] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 2, the ratio of the mixed solution of absolute ethanol and tridecafluorooctyltriethoxysilane is changed from 100:1-2 to 150:1 -2. Others are the same as the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that: in step 3, the ratio of zinc oxide to polydimethylsiloxane is changed from the original 1:1-3 to 2:1-3 , and others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a multifunctional super-hydrophobic coating with mechanical stability, and belongs to the field of multifunctional application coatings. The method comprises the following steps: respectively dissolving zinc nitrate and potassium hydroxide in deionized water, slowly dropwise adding the zinc nitrate solution into the potassium hydroxide solution under magnetic stirring, transferring the obtained solution into a high-pressure kettle, reacting for 5 hours under mild conditions, centrifuging and drying to obtain zinc oxide with special morphology, and performing hydrophobic modification on the zinc oxide particles obtained by the method by using tridecafluorooctyltriethoxysilane, adding n-hexane, polydimethylsiloxane and absolute ethyl alcohol into a beaker according to a certain proportion, fully stirring, adding modified zinc oxide into the mixed solution, carrying out ultrasonic treatment for half an hour, and finally spraying by using a spray gun to obtain the super-hydrophobic coating. The contact angle of the prepared super-hydrophobic coating reaches 157 degrees, the rolling angle is 4 degrees, and the super-hydrophobic coating has good mechanical stability, photocatalysis and antibacterial ability.

Description

technical field [0001] The invention belongs to the field of multifunctional application coatings, in particular to a preparation method of a multifunctional superhydrophobic coating with mechanical stability. The method for preparing the superhydrophobic coating is simple and low in cost, and the prepared superhydrophobic coating has antibacterial, photocatalytic, acid and alkali corrosion resistance and good mechanical stability. Background technique [0002] Superhydrophobic coatings have unique anti-wetting properties, which make superhydrophobic coatings anti-icing, anti-corrosion, resistance reduction, oil-water separation, antibacterial and self-cleaning, etc. Coatings are widely used in various fields. The anti-icing properties can be used in the field of deicing to reduce the freezing phenomenon of photovoltaic cells and power lines in winter. Corrosion protection and drag reduction properties can be used in marine applications, aircraft and pipelines, etc. In ad...

Claims

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Application Information

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IPC IPC(8): C09D5/14C09D183/04C09D7/62
CPCC08K2003/2296C08K2201/011C09D5/14C09D183/04C09D7/62C08K9/06C08K3/22
Inventor 邢子鹏程添智朱琦周卫顾博张震
Owner HEILONGJIANG UNIV
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