Method for plating silver on surface of carbon material

A carbon material and silver-plating technology, applied in metal material coating process, liquid chemical plating, coating, etc., can solve problems such as complex process flow, low reaction efficiency, uneven coating, etc., and achieve simple process and low residue The effect of low content and cost reduction

Inactive Publication Date: 2020-04-28
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electroless plating method is mainly to pretreat the carbon material through roughening, sensitization, and activation processes, and then impregnate the carbon material in a silver salt solution, and add reducing agents, stabilizers, and complexing agents at the same time. The surface of the material is coated with silver nanoparticles, which has the advantages of high silver plating efficiency, but the process is complicated, and other impurity elements are easy to remain, and the coating is uneven
The electroplating method mainly uses carbon material as the cathode, stainless steel and other insoluble metal materials as the anode, and silver salt solution as the electrolyte. By applying a voltage between the electrodes to plate silver on the surface of the carbon material, it has the advantages of uniform and firm coating, but the equipment More complicated and cumbersome to operate
The light radiation method is mainly to impregnate the carbon material into the silver nitrate solution, and then continue to illuminate to decompose the silver nitrate to produce silver nanoparticles. It has the advantages of simple process, but the reaction efficiency is low.

Method used

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  • Method for plating silver on surface of carbon material
  • Method for plating silver on surface of carbon material
  • Method for plating silver on surface of carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 graphite flake silver plating method

[0040] (1) Modification of graphite flakes: 1 g of polyvinylpyrrolidone was added to 49 g of deionized water, and after stirring for 10 minutes, 5 g of graphite flake powder was added and stirred for 30 minutes at a stirring rate of 400 rpm / min.

[0041] (2) Impregnation and drying of graphite flakes: Dissolve 5g of silver nitrate in 45g of deionized water, then add it to the mixed solution prepared in step (1), stir for 4h at a stirring rate of 400rpm / min, then place in a light-proof environment freeze-dried to constant weight.

[0042] (3) Calcination and reduction: place the impregnated and dried graphite flake powder in a corundum crucible, put it into a tube furnace, and heat up and calcinate for reduction in an argon atmosphere. The heating rate is 10°C / min, and the calcination temperature is 500°C. , heat preservation for 30min, to obtain silver-coated graphite flake powder.

[0043] The silver content of the ...

Embodiment 2

[0044] Embodiment 2 graphene oxide silver plating method

[0045] (1) Modification of graphene oxide: 1g maleic anhydride grafted polypropylene emulsion was added to 49g deionized water, after stirring for 10min, 100mL graphene oxide solution was added, the concentration of graphene oxide solution was 5g / L, Stir for 30 min at a stirring rate of 400 rpm / min.

[0046](2) Impregnation and drying of graphene oxide: Dissolve 3g of silver nitrate in 47g of deionized water, then add it to the mixed solution configured in step (1), stir for 4h at a stirring rate of 400rpm / min, and then place it in the dark Stir and heat up in the environment and dry to constant weight, the drying temperature is 60°C.

[0047] (3) Calcination and reduction: place the impregnated and dried carbon fiber powder in a corundum crucible, put it into a tube furnace, and heat up and calcined for reduction in an argon atmosphere. The heating rate is 10°C / min, and the calcination temperature is 1000°C. Insulat...

Embodiment 3

[0049] Embodiment 3 carbon fiber silver plating method

[0050] (1) Modification of carbon fiber: Add 1 g of polyvinyl alcohol solution into 49 g of deionized water, and after stirring for 10 min, add 5 g of carbon fiber powder, and stir for 30 min at a stirring speed of 400 rpm / min.

[0051] (2) Impregnation and drying of carbon fiber: Dissolve 10g of silver nitrate in 40g of deionized water, then add it to the mixed solution prepared in step (1), stir for 4h at a stirring rate of 400rpm / min, and then place it in a light-proof environment Heat up and stir to dry to constant weight, the drying temperature is 60°C.

[0052] (3) Calcination and reduction: place the impregnated and dried carbon fiber powder in a corundum crucible, put it into a tube furnace, and heat up and calcinate and reduce in an argon atmosphere. The heating rate is 10°C / min, and the calcination temperature is 500°C. Insulated for 30 minutes to obtain silver-plated carbon fiber powder.

[0053] The silver ...

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Abstract

The invention relates to a method for plating silver on the surface of a carbon material. The method comprises the steps that firstly, the carbon material is subjected to surface modification througha surface sizing agent, then a silver salt solution is added, after the solution is evenly mixed, drying is conducted, and high-temperature heat reduction is conducted in the inert atmosphere to obtain the surface silver-plated carbon material. According to silver particles in the obtained silver-plated carbon material, the size range is 10-600 nm, and the silver content is 15-60wt.%. A preparation process is simplified, impurity residue is lowered, the binding strength of a coating is improved, the conductivity of the carbon material is enhanced, and the method has important application valuein the fields such as conductive composite materials and electromagnetic shielding materials.

Description

technical field [0001] The invention relates to a method for plating silver on the surface of a carbon material, specifically using maleic anhydride grafted polypropylene to modify the surface of the carbon material, then adding a silver salt solution and drying it, and decomposing the silver salt on the carbon material The silver nanoparticles deposited on the surface can be used to prepare highly conductive carbon materials, which have important application value in the fields of conductive composite materials and electromagnetic shielding materials. Background technique [0002] Carbon materials widely exist in nature and have a variety of allotropes. Common ones include zero-dimensional fullerenes, one-dimensional carbon nanotubes and carbon fibers, two-dimensional graphene and graphite sheets, and three-dimensional carbon nanocones and nanodiamond. Carbon materials are widely used in aerospace, medical equipment and automobiles due to their excellent mechanical, electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/04C23C18/08
CPCC23C18/04C23C18/08
Inventor 胡友根田锭坤王勇张玲辛培培邓飞孙蓉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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