Salt-fog-resistant silver-plated aluminum powder conductive coating and preparation method thereof

A conductive coating, silver-plated aluminum technology, applied in the field of salt spray-resistant silver-plated aluminum powder conductive coating and its preparation, can solve the problem of insufficient salt spray resistance of the conductive coating, and improve the overall economic benefits and operation principles. Simple and easy to implement, avoids the effect of high energy consumption

Active Publication Date: 2021-05-14
中晟嘉特材料科技(西安)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a salt spray resistant silver-plated aluminum powder conductive coating and its preparation method, which solves the defect of insufficient salt spray resistance of the existing conductive coating

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  • Salt-fog-resistant silver-plated aluminum powder conductive coating and preparation method thereof

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preparation example Construction

[0037] The invention discloses a preparation method of a salt-spray-resistant silver-plated aluminum powder conductive coating, which specifically comprises the following steps:

[0038] Step 1, aluminum powder pretreatment

[0039] Step 1.1, cleaning and removing impurities: take some aluminum powder, put it in ethanol aqueous solution (absolute ethanol: deionized water is 2~3:1) and ultrasonically treat at 80Hz~100Hz for 15~20min, then wash with water and filter 2~3 times , to obtain the processed aluminum powder for subsequent use;

[0040] Through cleaning and removing impurities, it is possible to clean the surface of aluminum powder and remove organic impurities. Because aluminum powder is prepared with special oil, there are a lot of oil stains on the surface, and ethanol, as a good organic solvent, can remove most of the oil stains and ensure aluminum The surface of the powder is clean to ensure a clean surface and provide a basis for subsequent modification.

[0041...

Embodiment 1

[0060] Step 1, pretreatment of aluminum powder (the aluminum powder is spherical aluminum powder with a particle size of 5 μm)

[0061] Step 1.1, cleaning and removing impurities: Weigh 50g of aluminum powder, put it in 600mL of ethanol aqueous solution (400mL of absolute ethanol, 200mL of deionized water) for 80Hz ultrasonic treatment for 20min, then wash with water and suction filter 3 times to obtain the treated aluminum powder, spare;

[0062] Step 1.2, 2-methoxy-4-methylphenol coating treatment to obtain reduced aluminum powder coated with a reduced layer on the surface: place the aluminum powder treated in step 1.1 in 2g / L 2-methoxy-4- Carry out the surface modification reaction in the methylphenol aqueous solution, the dosage of 2-methoxyl-4-methylphenol is 2.5g, the dosage of 2-methoxyl-4-methylphenol is 5% of the quality of aluminum powder, and then use trihydroxy Adjust the pH to 8.5 with methylaminomethane (tris), place it in a constant temperature magnetic stirrer...

Embodiment 2

[0075] Step 1, pretreatment of aluminum powder (the aluminum powder is a spherical aluminum powder with a particle size of 35 μm)

[0076] Step 1.1, cleaning and removing impurities: Weigh 50g of aluminum powder, put it in 600mL of ethanol aqueous solution (400mL of absolute ethanol, 200mL of deionized water) for 80Hz ultrasonic treatment for 20min, then wash with water and suction filter 3 times to obtain the treated aluminum powder, spare;

[0077] Step 1.2, 2-methoxy-4-methylphenol coating treatment to obtain reduced aluminum powder coated with a reduction layer on the surface: place the aluminum powder treated in step 1.1 in 4g / L 2-methoxy-4- Carry out the surface modification reaction in the methylphenol aqueous solution, the dosage of 2-methoxyl-4-methylphenol is 5g, the dosage of 2-methoxyl-4-methylphenol is 10% of the quality of aluminum powder, and then use trimethylol Tris was adjusted to PH to 8.5, placed in a constant temperature magnetic stirrer, and reacted in a...

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Abstract

The invention discloses a salt-fog-resistant silver-plated aluminum powder conductive coating and a preparation method thereof, and belongs to the technical field of conductive coating preparation. Aluminum powder is placed in a 2-methoxy-4-methylphenol aqueous solution for a surface modification reaction, a modified product is washed and then dried, and reduced aluminum powder with the surface coated with a reduction layer is prepared; the obtained reduced aluminum powder is subjected to surface activity treatment washing through a silver source, and activated aluminum powder with elemental silver on the surface is obtained after an active product is washed; the obtained activated aluminum powder is subjected to chemical silver plating treatment, and silver-plated aluminum powder is prepared; graft modification is conducted on the silver-plated aluminum powder by adopting perfluorodecanethiol to obtain a grafted product, and the obtained grafted product is washed and dried to obtain modified silver-plated aluminum powder; and the obtained modified silver-plated aluminum powder is sprayed on a coating substrate to obtain a coating, and the obtained coating is dried to obtain the salt-fog-resistant silver-plated aluminum powder conductive coating. The preparation method is simple to operate and low in cost, and the obtained product is excellent in salt spray corrosion resistance and has expanded-scale production value.

Description

technical field [0001] The invention belongs to the technical field of conductive coating preparation, and relates to a salt-spray resistant silver-plated aluminum powder conductive coating and a preparation method thereof. Background technique [0002] As a functional coating, conductive coating has both the conductivity of metal materials and the excellent mechanical properties of polymer materials, and the construction process is simple, which is convenient for surface coating of various items, making it popular in the field of electromagnetic repair. widespread attention. [0003] In conductive coatings, blended conductive polymers are mainly used. The polymer matrix provides the basis for film formation and mechanical properties, and the conductive filler provides the conductivity of the coating. However, this type of conductive filler is mixed with the polymer matrix. The conductivity of the conductive coating will be appropriately reduced, and the mixed organic solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/24
CPCC09D1/00C09D5/24
Inventor 苏晓磊官效岩
Owner 中晟嘉特材料科技(西安)有限公司
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