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Preparation method of carbon-silver microsphere/epoxy resin super-hydrophobic coating

A super-hydrophobic coating, epoxy resin technology, applied in epoxy resin coatings, antifouling/underwater coatings, coatings, etc., can solve the problems of high production cost of super-hydrophobicity, single preparation method, and strong substrate dependence. , to achieve the effects of strong chemical stability and thermal stability, easy availability of raw materials and high mechanical strength

Active Publication Date: 2018-11-09
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of preparation method of carbon-silver microsphere / epoxy resin superhydrophobic coating, provide a kind of simple, convenient, universal, the method that can prepare superhydrophobic coating of large area, solve Superhydrophobic has problems such as high production cost, weak mechanical strength, strong substrate resistance, and single preparation method

Method used

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  • Preparation method of carbon-silver microsphere/epoxy resin super-hydrophobic coating
  • Preparation method of carbon-silver microsphere/epoxy resin super-hydrophobic coating
  • Preparation method of carbon-silver microsphere/epoxy resin super-hydrophobic coating

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Effect test

Embodiment 1

[0035] (1) Preparation of flower-like carbon-silver microspheres:

[0036] Dissolve 1.25 g of silver nitrate in a mixed solution of 80 mL of water and 40 mL of ethanol, and add a certain amount of ammonia water (0.02 M) dropwise under magnetic stirring to adjust the pH to about 8.5. 50 mL of 20 mg / mL dopamine hydrochloride solution was added dropwise to the system, and the reaction was continued for 12 h. After the reaction, it was suction filtered and placed in a -25 °C refrigerator for 24 h. Then calcined at 450 °C for 3 h in a sealed muffle furnace to obtain a black powder product, thus completing the preparation of flower-like carbon-silver microspheres.

[0037] (2) Low surface energy modification:

[0038] Add the carbon-silver microsphere powder product prepared in step A to 50 ml of 0.5% perfluorooctyltriethoxysilane n-hexane solution, and stir to disperse it. After reacting for 20 min, the modified white powder was obtained by centrifugation, washing with n-hexane ...

Embodiment 2

[0042] (1) Preparation of flower-like carbon-silver microspheres:

[0043] Dissolve 1.25 g of silver nitrate in a mixed solution of 80 mL of water and 40 mL of ethanol, and add a certain amount of ammonia water (0.02 M) dropwise under magnetic stirring to adjust the pH to about 8.5. 50 mL of 20 mg / mL dopamine hydrochloride solution was added dropwise to the system, and the reaction was continued for 12 h. After the reaction, it was suction filtered and placed in a -25 °C refrigerator for 24 h. Then calcined at 450 °C for 3 h in a sealed muffle furnace to obtain a black powder product, thus completing the preparation of flower-like carbon-silver microspheres.

[0044] (2) Low surface energy modification:

[0045] Add the carbon-silver microsphere powder product prepared in step A to 50 ml of 0.5% perfluorooctyltriethoxysilane n-hexane solution, and stir to disperse it. After reacting for 20 min, the modified white powder was obtained by centrifugation, washing with n-hexane ...

Embodiment 3

[0049] (1) Preparation of flower-like carbon-silver microspheres:

[0050] Dissolve 1.25 g of silver nitrate in a mixed solution of 80 mL of water and 40 mL of ethanol, and add a certain amount of ammonia water (0.02 M) dropwise under magnetic stirring to adjust the pH to about 8.5. 50 mL of 20 mg / mL dopamine hydrochloride solution was added dropwise to the system, and the reaction was continued for 12 h. After the reaction, it was suction filtered and placed in a -25 °C refrigerator for 24 h. Then calcined at 450 °C for 3 h in a sealed muffle furnace to obtain a black powder product, thus completing the preparation of flower-like carbon-silver microspheres.

[0051] (2) Low surface energy modification:

[0052] Add the carbon-silver microsphere powder product prepared in step A to 50 ml of 0.5% perfluorooctyltriethoxysilane in n-hexane solution, and stir to disperse it. After reacting for 20 min, the modified white powder was obtained by centrifugation, washing with n-hexa...

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Abstract

The invention belongs to the technical field of preparation of super-hydrophobic materials and in particular relates to a preparation method of a carbon-silver microsphere / epoxy resin super-hydrophobic coating. The preparation method comprises the steps of preparing flower-shaped carbon-silver microspheres, carrying out low-surface-energy modification, combining super-hydrophobic powder and a substrate and the like. The ending angle of each substrate covered with the super-hydrophobic powder on water is greater than 150 degrees and the rolling angle is less than 10 degrees. The combined super-hydrophobic substrate has very strong wear resistance, self-cleaning performance, pollution resistance, high temperature resistance and chemical stability. Meanwhile, even if a surface is forcedly damaged, the surface can also be repaired through sieving and scattering, spraying or dip coating again. The preparation method provided by the invention has the advantages of simple preparation technology, easiness for obtaining raw materials, no toxin and environmental protection, low cost and high stability; the carbon-silver microsphere / epoxy resin super-hydrophobic coating is suitable for large-area preparation and application, is suitable for fields such as industrial pipeline transportation under extremely bad working environments and is also suitable for fields including industrial pipeline transportation, preparation of oil-water separation metal nets and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of superhydrophobic coatings, in particular to a method for preparing a carbon-silver microsphere / epoxy resin superhydrophobic coating, which can be prepared with strong wear resistance, self-cleaning, antifouling and chemical stability superhydrophobic coating. Background technique [0002] Superhydrophobic phenomena exist widely in nature, such as the surface of lotus leaves, butterfly wings, and water strider legs. Superhydrophobic surface generally refers to the surface of the surface of the material whose end angle to water is greater than 150° and the rolling angle is less than 10°. Superhydrophobic surfaces have many unique and excellent properties: hydrophobic, self-cleaning, anti-corrosion, anti-icing, anti-fog and other properties, making them have great application prospects in many fields. [0003] Superhydrophobic powder has better storage, transportation, and selectivity, and i...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D127/16C09D5/16
CPCC08L2201/08C09D5/1618C09D163/00C08L27/16C08K7/00C08K7/18
Inventor 赵美云吴阳赵新泽田森习森明彭文昱
Owner CHINA THREE GORGES UNIV
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