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A kind of preparation method of metal-graphene composite electroplating material

A graphene composite and graphene technology, applied in electrolytic coatings, electrodes, coatings, etc., can solve the problems of obvious graphene agglomeration, insignificant effect, rough surface of composite coating, etc., and achieve the effect of avoiding agglomeration and good performance

Active Publication Date: 2020-10-02
SOUTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] L. Ji, F. Chen, H. Huang, X. Sun, Y. Yan and X. Tang in "Preparation of nickel-graphene composites by jet electrodeposition and the in fluence of graphene oxide concentration on the morphologies and properties" The deposition method reduces graphene oxide and adds chemical dispersant to prepare nickel-graphene composite coating, see image 3 and Figure 4 , the composition of the plating solution and the process parameters shown in , in order to reduce the agglomeration of graphene to obtain a smooth coating, but the effect is not significant, the surface of the obtained composite coating is rough, and the agglomeration of graphene is obvious

Method used

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  • A kind of preparation method of metal-graphene composite electroplating material

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Embodiment 1

[0031] Embodiment 1, a preparation method of a metal-graphene composite electroplating material, a graphite rod is used as an anode, a substrate to be plated is used as a cathode, and the substrate to be plated is carbon steel. Then prepare the electrolyte, weigh acetamide, urea and ammonium nitrate, the three are respectively by weight percentage: 37.4wt% acetamide, 28wt% urea and 34.6wt% ammonium nitrate, at a temperature of 70 ° C Stir and melt until a transparent, clear and colorless liquid is obtained, then add 0.1mol / L nickel chloride hexahydrate to the colorless liquid, stir and dissolve to obtain a transparent and clear light green liquid, then add 25~35g / L boric acid , stirred and dissolved to obtain an electrolyte solution, and finally the pH value of the electrolyte solution was adjusted to 4 by adding hydrochloric acid. Then set the electroplating parameters for electroplating. The electroplating parameters are: temperature is 50°C, voltage is 3V and current densit...

Embodiment 2

[0034] Embodiment two, a kind of preparation method of metal-graphene composite electroplating material, anode, cathode, substrate to be plated and electrolyte are the same as embodiment one, electroplating parameters are: temperature is 50 ℃, voltage is 2.5V and current density is 20mA·cm -2 Under the condition of magnetic stirring, the stirring rate is 500rpm, the anode and the cathode are placed in the prepared electrolyte for co-deposition for 5h, and the nickel-graphene composite coating is obtained. The hardness of the composite coating is 424HV.

[0035] see Figure 7 , the SEM image of the surface of the nickel-graphene composite coating shown, the observation shows that the graphene is evenly distributed and compact, the surface is smooth and smooth, and there is no agglomeration phenomenon.

Embodiment 3

[0036] Embodiment three, a kind of preparation method of metal-graphene composite electroplating material, anode, cathode, substrate to be plated and electrolyte are the same as embodiment one, electroplating parameters are: temperature is 50 ℃, voltage is 2.5V and current density is 5mA·cm -2 Under the condition of magnetic stirring, the stirring rate is 500rpm, the anode and the cathode are placed in the prepared electrolyte for co-deposition for 4 hours, and the nickel-graphene composite coating is obtained. The hardness of the composite coating is 423HV.

[0037] see Figure 8 , the SEM image of the surface of the nickel-graphene composite coating shown, the observation shows that the graphene is evenly distributed and compact, the surface is smooth and smooth, and there is no agglomeration phenomenon.

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Abstract

The invention discloses a preparing method of a metal-graphene composite electroplating material. Graphene serves as an anode, a base body to be electroplated serves as a cathode, main salt and an additive are added into a graphene stripping agent to obtain an electrolyte, and under the conditions that the temperature ranges from 25 to 75 DEG C, the voltage ranges from 2.5 to 5 V, and the currentdensity ranges from 5 to 20 mA.cm<-2>, the anode and the anode are placed in to the electrolyte to be subjected to codeposition for three to five hours, and a metal-graphene composite coating is obtained. Agglomeration of graphene in the electrolyte and the coating material can be effectively prevented, and the prepared graphene doped metal base composite electroplating material is compact, flat and smooth in surface and free of agglomeration.

Description

technical field [0001] The invention relates to the preparation of a composite electroplating material, in particular to a preparation method of a metal-graphene composite electroplating material. Background technique [0002] When using the composite electroplating method to prepare metal-based composite coating materials, a problem that is difficult to overcome is the agglomeration of nano or micron-scale dopants added to the electroplating solution. Due to this agglomeration, various defects appear in the obtained composite coating materials, such as Porosity inside the coating, poor compactness of the coating, rough and uneven surface of the coating, etc. In order to solve the problem of dopant dispersion, methods such as adding dispersant, mechanical stirring, magnetic stirring, ultrasonic dispersion or spray deposition are commonly used at present, but none of these methods can completely and effectively solve the above-mentioned agglomeration problem. [0003] Xu Sim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C25D3/12C25D3/38C25D3/44C25D3/06C25D17/10
CPCC25D3/06C25D3/12C25D3/38C25D3/44C25D15/00C25D17/10
Inventor 聂朝胤向莉
Owner SOUTHWEST UNIV
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