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Preparation method of graphene-nickel phosphide composite coating and prepared coating

A composite coating and graphene technology, which is applied in the direction of liquid chemical plating, coating, metal material coating process, etc., can solve the problems that affect the comprehensive performance of the composite coating, poor controllability, and different reduction degrees, and achieve the improvement of pinholes The effects of bubble defects, dense structure, and accelerated diffusion

Active Publication Date: 2019-07-16
超丰微纳科技(宁波)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of reducing graphene oxide, the degree of reduction of graphene oxide by different reducing agents is different, and the controllability is poor, which greatly affects the comprehensive performance of the composite coating.

Method used

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  • Preparation method of graphene-nickel phosphide composite coating and prepared coating
  • Preparation method of graphene-nickel phosphide composite coating and prepared coating
  • Preparation method of graphene-nickel phosphide composite coating and prepared coating

Examples

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Embodiment 1

[0051] see figure 1 , which is a schematic flow chart of a method for preparing a graphene-nickel phosphide composite coating in an embodiment of the present invention, and the method for preparing a graphene-nickel phosphide composite coating described in this embodiment includes the following steps:

[0052] (1) Preparation of graphene:

[0053] Place the graphite sheet on the positive pole of the DC power supply, place the platinum wire electrode on the negative pole of the DC power supply, immerse in the electrolyte of 0.5mol / L ammonium sulfate aqueous solution, change the applied voltage value and voltage action time, and peel off. The obtained graphene was vacuum-filtered, washed with deionized water, transferred to N-methylpyrrolidone, ultrasonically dispersed for 30 minutes, and then left to stand for 48 hours. Take the upper layer solution for vacuum filtration and deionized water cleaning, transfer the collected graphene microflakes to an aqueous solution of sodium ...

Embodiment 2

[0066] The preparation method of the graphene-nickel phosphide composite coating described in the present embodiment comprises the steps:

[0067] (1) Preparation of graphene:

[0068] Place the graphite sheet on the positive pole of the DC power supply, place the platinum wire electrode on the negative pole of the DC power supply, immerse in the electrolyte of 0.5mol / L ammonium sulfate aqueous solution, change the applied voltage value and voltage action time, and peel off. The obtained graphene was vacuum-filtered, washed with deionized water, transferred to N-methylpyrrolidone, ultrasonically dispersed for 30 minutes, and then left to stand for 48 hours. Take the upper layer solution for vacuum filtration and deionized water cleaning, transfer the collected graphene microflakes to an aqueous solution of sodium dodecyl sulfate for ultrasonic dispersion for 3h, and carry out surface modification on the graphene microchips to make the graphene microchips able to disperse even...

Embodiment 3

[0080] The preparation method of the graphene-nickel phosphide composite coating described in the present embodiment comprises the steps:

[0081] (1) Preparation of graphene:

[0082] Place the graphite sheet on the positive pole of the DC power supply, place the platinum wire electrode on the negative pole of the DC power supply, immerse in the electrolyte of 0.5mol / L ammonium sulfate aqueous solution, change the applied voltage value and voltage action time, and peel off. The obtained graphene was vacuum-filtered, washed with deionized water, transferred to N-methylpyrrolidone, ultrasonically dispersed for 30 minutes, and then left to stand for 48 hours. Take the upper layer solution for vacuum filtration and deionized water cleaning, transfer the collected graphene microflakes to an aqueous solution of sodium dodecyl sulfate for ultrasonic dispersion for 3h, and carry out surface modification on the graphene microchips to make the graphene microchips able to disperse even...

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Abstract

The invention relates to the technical field of composite coatings, in particular to a preparation method of a graphene-nickel phosphide composite coating and the prepared coating. The preparation method of the graphene-nickel phosphide composite coating comprises the following steps that graphene is dispersed in nickel phosphide plating liquid in an ultrasonic mode to obtain composite plating liquid, and then a pre-processed matrix is placed in the composite plating liquid for ultrasonic plating. According to the preparation method of the graphene-nickel phosphide composite coating and the prepared coating, ultrasound and a surfactant are introduced, and thus in the processes of preparing the composite plating liquid and plating, the graphene can be dispersed fully, and agglomeration of the graphene is effectively prevented; and micro-bubbles in the plating liquid vibrate under the effect of ultrasonic waves and grow to gather energy, when a threshold value is reached, the bubbles collapse to release energy, local high temperature and high pressure are generated to promote uniform mixing of reactants in the composite plating liquid, diffusion of the reactants and products are accelerated, formation of a new solid phase is promoted, and the deposition rate of the composite coating is improved.

Description

technical field [0001] The invention relates to the technical field of composite coatings, in particular to a method for preparing a graphene-nickel phosphide composite coating and the prepared coating. Background technique [0002] Electroless nickel phosphide (Ni-P) coating has been widely used in mold materials due to its high hardness, good corrosion resistance and wear resistance. In recent years, graphene has received more and more attention in composite materials. Adding graphene as a reinforcing phase to nickel phosphide (Ni-P) coatings is beneficial to improve the comprehensive performance of composite coatings. [0003] Among the existing graphene-nickel phosphide (G-Ni-P) composite coating preparation schemes, the coating prepared by electroless plating has won the favor of researchers due to its high surface quality and good bonding force. Because graphene has a high specific surface area and surface energy, it is easy to agglomerate in the solution, which affec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/50C23C18/18
CPCC23C18/1666C23C18/1803C23C18/50
Inventor 周天丰于谦蒋永刚闫兴梁志强颜培王西彬
Owner 超丰微纳科技(宁波)有限公司
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