Modified silver powder conductive coating and preparation method thereof

A conductive coating and silver powder technology, applied in conductive coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve the problems of reduced chemical corrosion effectiveness, and achieve the effects of improving interface characteristics, increasing service life, and optimal service life

Active Publication Date: 2020-04-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned problems or deficiencies, in order to solve the problem that the effectiveness of the existing conductive paint is sharply reduced due to the reaction with the metal substrate in the actual application, the present invention provides a modified silver powder conductive paint and a preparation method thereof. Control the reaction temperature, reaction time and modifier when modifying the silver powder, and the prepared conductive coating has excellent electrical conductivity and good corrosion resistance with the metal substrate system

Method used

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  • Modified silver powder conductive coating and preparation method thereof
  • Modified silver powder conductive coating and preparation method thereof
  • Modified silver powder conductive coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: In 150 parts by mass of absolute ethanol, add 0.3 parts by mass of dodecyl mercaptan, stir and dissolve evenly;

[0025] Step 2: Add 30 parts by mass of silver powder to the mixed solution obtained in step 1 to prepare a uniformly dispersed mixed solution;

[0026] Step 3: Put the mixed solution obtained in Step 2 into a water bath, and react at 60°C for 5 hours, during which a magnetic stirrer is used to continuously stir to make the solution fully react;

[0027] Step 4: After step 3 is completed, wait for the solution to cool down naturally, add absolute ethanol to wash by centrifugation for 3 times, and then vacuum-dry at 60°C for 4 hours to obtain modified silver powder;

[0028] Step 5: Weigh 3 parts by mass of epoxy resin component B and 15 parts by mass of butyl acetate, and stir until component B of epoxy resin is completely dissolved;

[0029] Step 6: Add the modified silver powder prepared in Step 4 to the solution prepared in Step 5, stir evenly, ad...

Embodiment 2

[0031] Step 1: In 150 parts by mass of absolute ethanol, add 0.9 parts by mass of dodecyl mercaptan, stir and dissolve evenly;

[0032] Step 2: Add 30 parts by mass of silver powder to the mixed solution obtained in step 1 to prepare a uniformly dispersed mixed solution;

[0033] Step 3: Put the mixed solution obtained in Step 2 into a water bath, and react at 40°C for 5 hours, during which a magnetic stirrer is used to continuously stir to make the solution fully react;

[0034] Step 4: After step 3 is completed, wait for the solution to cool down naturally, add absolute ethanol to wash by centrifugation for 3 times, and then vacuum-dry at 60°C for 4 hours to obtain modified silver powder;

[0035] Step 5: Weigh 3 parts by mass of epoxy resin component B and 15 parts by mass of butyl acetate, and stir until component B of epoxy resin is completely dissolved;

[0036] Step 6: Add the modified silver powder prepared in Step 4 to the solution prepared in Step 5, stir evenly, ad...

Embodiment 3

[0038] Step 1: In 150 parts by mass of absolute ethanol, add 0.9 parts by mass of dodecyl mercaptan, stir and dissolve evenly;

[0039] Step 2: Add 30 parts by mass of silver powder to the mixed solution obtained in step 1 to prepare a uniformly dispersed mixed solution;

[0040] Step 3: Put the mixed solution obtained in Step 2 into a water bath, and react at 60°C for 8 hours, during which a magnetic stirrer is used to continuously stir to make the solution fully react;

[0041] Step 4: After step 3 is completed, wait for the solution to cool down naturally, add absolute ethanol to wash by centrifugation for 3 times, and then vacuum-dry at 60°C for 4 hours to obtain modified silver powder; figure 2 It is the S2p discrete diagram of the modified silver powder XPS obtained in Step 4 of Example 3, which shows that dodecyl mercaptan has been successfully grafted on the surface of the silver powder.

[0042] Step 5: Weigh 3 parts by mass of epoxy resin component B and 15 parts b...

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Abstract

The invention belongs to the technical field of conductive coatings, and particularly relates to a modified silver powder conductive coating and a preparation method thereof. The method is consideredfrom a brand-new perspective; the surface of silver powder is modified, organic matters are grafted on the surface of the silver powder, and the organic matters on the surface of the silver powder caneffectively improve the interface characteristics between the silver powder and resin; the number of micropores and gaps in the conductive coating is reduced; corrosive substances such as water vaporare better prevented from entering a coating layer of the conductive coating; the silver powder is prevented from easily generating electrochemical corrosion with a metal substrate due to high conductivity of the silver powder; especially in the coastal environment with high humidity and high salt concentration, the problem of failure of the conductive coating is solved, longer service life of the conductive coating on a metal substrate is ensured, the conductive coating has good salt mist corrosion resistance in a system formed by the conductive coating and tinplate, and the service life ofthe conductive coating is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of conductive paint, and in particular relates to a modified silver powder conductive paint and a preparation method thereof. Background technique [0002] In modern warfare, detection and anti-detection capabilities play an extremely important role in order to gain the initiative of the war, and radar stealth capability is one of the essential anti-detection technologies for modern combat aircraft. Therefore, radar stealth technology has become the most important type of technology, has received extensive attention from all over the world, and has achieved rapid development. At present, radar stealth is achieved mainly through two means: shape stealth and radar absorbing material coating. But this does not solve all the problems of stealth. Due to the large number of gaps on the surface of the aircraft and the inevitable edge scattering, the stealth capability of combat aircraft is limited. Therefore, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/24C09D5/10
CPCC09D163/00C09D5/24C09D5/10C08K2003/0806C08L2205/025C08L63/00C08K9/04C08K3/08
Inventor 张林博刘越洋谢建良谢海岩梁迪飞邓龙江
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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