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Nickel-nanodiamond composite plating solution and preparation thereof

A technology of nano-diamond and composite plating solution, which is applied in the direction of electrolytic coating, coating, etc., can solve the problems that the nano-diamond suspension cannot be kept stable for a long time, the structure and performance of the composite coating are difficult to control stably, and the cost of electroplating is increased, etc., to achieve stability Effects of controlling structure and performance, bright composite coating, and reducing electroplating cost

Inactive Publication Date: 2011-02-23
浣石
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only increases the cost of electroplating and complicates the electroplating process, but also the extensive use of surfactants containing elements such as sulfur and phosphorus will endanger the environment
At the same time, the nano-diamond suspension formed by this dispersion technology cannot remain stable for a long time, and it needs to be used as soon as possible to avoid the settlement of nano-diamonds, which makes it difficult to stably control the structure and performance of the composite coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] First pre-treat the nano-diamonds according to the following steps: put 8 stainless steel balls with a diameter of 6-8mm and 10g of unpurified nano-diamonds into two identical 100ml nylon tanks, and then add 5ml of absolute ethanol dropwise , and sealed with a nylon cap. Put two ball mill jars into a planetary ball mill (QM-BP type, manufactured by Nanjing University) symmetrically, and ball mill for 48 hours under the condition that the rotation speed is 350 rpm and the rotation direction is automatically switched every 30 minutes. Then soak and reflux with 30-50wt% hydrofluoric acid aqueous solution for 24h, filter, wash with running water, and dry; in 2M HNO 3 Sonicate in the solution for 24 hours, reflux for 24 hours, filter, and wash with running water; then sonicate for 5 hours in an aqueous solution of OP-10 with a pH of 8-10 and a concentration of 20-40wt%, filter, and wash with running water for 2-3 times. After three times, soak in 3M HCl solution, sonicate f...

Embodiment 2

[0056] The nano-diamond is firstly pretreated, and the pretreatment method is the same as that of the above-mentioned embodiment 1.

[0057] Then take 7g of the pretreated nano-diamond and add it to 300ml of acetone dissolved with 28g of phosphorus tribromide, stir at 35°C for 8h, and after ultrasonic reaction at 55°C for 72h, centrifuge at a speed of 5000rpm for 30min. After the carbon was cleaned, it was vacuum-dried at 30° C. for 36 hours to obtain nanodiamonds with acid halide functional groups on the surface.

[0058] Take 6g of the above-mentioned nano-diamond with acid halide functional groups on the surface, add it to 280ml N-methylpyrrolidone containing 19g 1,3-propanediamine and 17ml triethylamine, stir at 50°C for 8h, and ultrasonically react at 30°C After 12 hours, it was washed with tetrahydrofuran and dried in vacuum at 20° C. for 48 hours to obtain a modified nanodiamond with amino groups on the surface.

[0059] 8 g of the above-mentioned modified nano-diamond...

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Abstract

The invention discloses a nickel-nano-diamond composite plating solution, which is composed by the blending of the modified nano-diamond water or dilute sulfuric acid solution and the water solution of nickel sulfate, nickel chloride, boric acid, saccharin and butynediol with the size ratio 0.1-2:22. The invention also discloses the preparation method of the composite plating solution. The composite plating solution of the invention has a high degree of stability, in which the key issues existed in the nano-diamond composite plating technique, that the nano-diamond is easy to be in agglomeration and settlement and the plating solution is unstable, are resolved. Moreover the stable control of the structure and properties of the composite coating is faciliated. During the preparation process, the ultrasound technology and the organic surface-active agent are not required to adopt, which is not only help reduce the plating cost and simplify the plating technique, but also the environmental problems resulted from the adoption of the organic surface-active agents comprising sulfur, phosphorous and other elements are avoided. The composite coating obtained from the plating solution through a simple plating process is bright and smooth. Compared with the coating that has no nano-diamond and is obtained under the same conditions, the micro-hardness of the composite coating can be increased at most by 38%, and the coefficient of friction can be reduced by 29%.

Description

technical field [0001] The invention relates to a composite plating solution, in particular to a nickel-nanometer diamond composite plating solution and a preparation method of the plating solution. It belongs to the field of plating solution. Background technique [0002] Adding inert solid particles to the electroplating or chemical plating solution, the composite plating technology of co-depositing particles and metals by electroplating or chemical plating is an important material surface strengthening method that has developed rapidly in the past two decades (Wang Baichun, Zhu Yongwei , Xu Xiangyang, et al., Materials Herald, 17(10), 51-54, 2003). Due to the high hardness, wear resistance, self-lubrication, special decorative appearance and electrical contact functions of the composite coating, it provides greater possibilities for changing and adjusting the mechanical and physical and chemical properties of the material and forming various functional composite material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C25D3/16
Inventor 浣石黄风雷柯刚
Owner 浣石
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