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Super-hydrophobic coating and preparation method and application thereof

A super-hydrophobic coating and coating technology, applied in anti-fouling/underwater coatings, rosin coatings, epoxy resin coatings, etc., can solve the problems of negative impact on the marine environment, long half-life, etc., achieve good use value, reduce adhesion, and hydrophobicity. strong effect

Active Publication Date: 2021-11-05
天津朗华科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is anti-fouling, it has a negative impact on the marine environment and its long half-life in the environment has prompted marine paints to look for other non-persistent alternatives

Method used

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  • Super-hydrophobic coating and preparation method and application thereof
  • Super-hydrophobic coating and preparation method and application thereof
  • Super-hydrophobic coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The preparation method of silica airgel powder, comprises the following steps:

[0074] (1) Prepare a mixed solution of silicon source and solvent

[0075] Take sodium silicate with a modulus of 3.0 and put it into the reactor, add deionized water 6 times the mass of sodium silicate to dilute, stir the reactor at a speed of 300 rpm for 35 minutes, and filter through a 200-mesh sieve to obtain silicon Sodium acid solution;

[0076] (2) Sol

[0077] Take nitric acid, add water, and dilute the concentration to 20 mol / L, add aluminum nitrate and yttrium nitrate to the nitric acid, mix well, and add it to the silicon obtained in step (1) by submerged injection (simultaneous injection of multiple metering pumps) Sodium silicate solution; the whole feeding time is controlled at 20 minutes, the stirring speed is 325 rpm, the pH value of the sodium silicate solution is controlled to be 2.0, and the sol is obtained; the aluminum nitrate and yttrium nitrate are calculated as oxi...

Embodiment 2

[0090] The raw materials of the adhesive, calculated in parts by weight, include:

[0091] 25 parts of distilled water;

[0092] 15 parts of silica sol;

[0093] 3 parts of perfluorooctyltrimethoxysilane;

[0094] 9 parts of magnesium hydroxide;

[0095] 3 parts of polyvinyl alcohol;

[0096] Polyurethane particles 5 parts.

[0097] The solid content of the silica sol is 30%.

[0098] The preparation method of silica sol is, comprises the following steps:

[0099] (1) Prepare a mixed solution of silicon source and solvent

[0100] Put sodium silicate with a modulus of 3.5 into the reaction kettle, add deionized water twice the mass of sodium silicate to dilute, stir the reaction kettle at a speed of 100 rpm for 30 minutes, and filter through a 200-mesh sieve to obtain silicon Sodium acid solution;

[0101] (2) Sol

[0102] Take sulfuric acid, adjust it to 10 mol / L with deionized water, add zirconium sulfate and cerium sulfate to the sulfuric acid, mix well, and add it...

Embodiment 3

[0123] A kind of superhydrophobic coating, described superhydrophobic coating is the oily coating that contains antifouling microsphere

[0124] The formula of described oil paint is as:

[0125] Acrylic resin (NeoCryl B-810): 25 parts by weight;

[0126] E-44 epoxy resin: 6 parts by weight;

[0127] Rosin: 20 parts by weight;

[0128] 2 parts by weight of alumina airgel;

[0129] Antifouling microspheres: 4 parts by weight;

[0130] Pigments and fillers: 1 part by weight of talcum powder, 6 parts by weight of calcium phosphite, and 2 parts by weight of iron red;

[0131] Mixed solvent: 14 parts by weight of xylene, 6 parts by weight of ethyl acetate;

[0132] Kaolin: 4 parts by weight.

[0133] The antifouling microspheres are calculated in parts by weight, including

[0134] 30 parts of silicon airgel powder; (using the silicon airgel powder prepared in Example 1)

[0135] Adhesive 15 parts. (Adopt the adhesive prepared in Example 2)

[0136] The preparation method...

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Abstract

The invention relates to a super-hydrophobic coating and a preparation method and application thereof. The super-hydrophobic coating is an oily coating containing antifouling microspheres; the antifouling microspheres comprise silica aerogel powder and an adhesive. The preparation method of the super-hydrophobic coating comprises the following steps: firstly, uniformly mixing the antifouling microspheres and the alumina aerogel with a mixed solvent in the coating, then uniformly mixing with the acrylic resin, the epoxy resin and the rosin in the coating, and finally uniformly mixing with other components in the coating to prepare the super-hydrophobic coating. The coating is used for the ship bottom to form the super-hydrophobic surface so that various marine organisms cannot be attached to the ship bottom, and the antifouling effect is effectively achieved.

Description

technical field [0001] The invention relates to the field of ship bottom antifouling, in particular to a superhydrophobic coating and its preparation method and application. Background technique [0002] There are many kinds of marine organisms living in the seawater, such as barnacles, seaweed, oysters and so on. In particular, barnacles will spit out a large amount of mucus, which is firmly attached to the bottom of the ship like glue, making the surface of the bottom of the ship rough, greatly reducing the speed of the ship and increasing energy consumption. At the same time, when the marine organisms attached to the bottom of the ship die and fall off, the primer film will be pulled off together, causing corrosion of the steel plate. In this regard, the best way is to use bottom antifouling paint. [0003] Antifouling paint is a special paint applied on the bottom of ships and marine underwater facilities. Generally, the paint is installed on the antirust paint on the ...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D193/04C09D163/02C09D5/16C09D7/61
CPCC09D133/00C09D5/1606C09D5/1618C09D5/1637C09D5/1625C09D5/1687C08L93/04C08L63/00C08L75/04C08L29/04C08K7/24C08K7/26C08K3/36C08K9/06C08K9/10
Inventor 郑善郑星
Owner 天津朗华科技发展有限公司
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