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A kind of salt-spray resistant silver-plated aluminum powder conductive coating and preparation method thereof

A technology of conductive coating and silver-plated aluminum is applied in the field of salt spray-resistant silver-plated aluminum powder conductive coating and its preparation, which can solve the problems of insufficient salt spray resistance of the conductive coating, and achieve the improvement of overall economic benefits and excellent electrical conductivity. performance, the effect of avoiding high energy consumption

Active Publication Date: 2022-02-25
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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  • A kind of salt-spray 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 for 2~3 times , to obtain the processed aluminum powder for subsequent use;

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

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, place 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- The surface modification reaction was carried out in an aqueous solution of methylphenol, the dosage of 2-methoxy-4-methylphenol was 2.5g, and the dosage of 2-methoxy-4-methylphenol was 5% of the quality of aluminum powder, and then trihydroxy Adjust the pH to 8.5 with methylaminomethane (tris), place it in a constant temperature magnet...

Embodiment 2

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

[0076] Step 1.1, cleaning and removing impurities: Weigh 50g of aluminum powder, place 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, then use trimethylol Tris was adjusted to PH to 8.5, placed in a constant temperature magnetic stirrer, and reacted in a wat...

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Abstract

The invention discloses a salt-spray-resistant silver-plated aluminum powder conductive coating and a preparation method thereof, belonging to the technical field of conductive coating preparation. Surface modification reaction is carried out by placing aluminum powder in 2-methoxy-4-methylphenol aqueous solution, washing and drying the modified product to obtain reduced aluminum powder coated with a reduction layer on the surface; The powder is subjected to surface active treatment and washing, and the active product is washed to obtain activated aluminum powder with elemental silver on the surface; the activated aluminum powder is subjected to chemical silver plating to obtain silver-plated aluminum powder; The powder is grafted and modified to obtain a grafted product, and the obtained grafted product is washed and dried to obtain a modified silver-plated aluminum powder; the obtained modified silver-plated aluminum powder is sprayed on the coated substrate to obtain a coating. The obtained coating is dried to obtain a salt-spray-resistant silver-plated aluminum powder conductive coating. The preparation method is simple in operation and low in cost, and the obtained product has excellent salt spray corrosion resistance, and has the value of expanding scale production.

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 Patents(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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