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Nickel-plated black phosphorus nanosheet lubricant and preparation method thereof

A technology of nanosheets and lubricants, which is applied in the direction of lubricating compositions, additives, liquid chemical plating, etc., can solve the problems of reduced lubricating effect, improved anti-wear performance, uneven coating, etc., and achieves reduced friction coefficient and wear amount, Improve the anti-friction and anti-wear effect, and the effect of simple preparation process

Active Publication Date: 2020-02-28
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lv et al [Tribology Letters,2018,66(2):61.] found that black phosphorus nanosheets as a lubricating additive can significantly improve the tribological properties of composite materials, and can play a better lubricating effect. The lubricating mechanism is due to the layer In the friction process, the material with the shape structure can play the role of interlayer slip to exert the lubrication effect; however, a recent tribological study [ASME Journal of Tribology, 2019, 141(7): 072101.] found that the black phosphorus nanosheet layer The bearing capacity of the material is not good, and the lubricating effect will be reduced when the load is large, that is, the lubricating performance of black phosphorus nanosheets under heavy load conditions needs to be further improved
Chinese patent [publication number: CN110157516A] discloses a method of compounding nano-titanium dioxide and black phosphorus nanosheets to form a new composite lubricant to improve the anti-friction and lubrication performance of black phosphorus nanosheets in a heavy-duty environment. A certain effect has been achieved, but its anti-wear performance still needs to be improved
[0006] Studies have shown that nickel plating on the surface of materials can show better friction reduction and anti-wear effects. Therefore, nickel plating on the surface of black phosphorus nanosheets is expected to produce more excellent anti-friction and anti-wear effects. However, conventional electroless plating The nickel method has poor nickel plating effect on non-metallic surfaces, uneven coating, difficult control of composition, loose combination, etc. Therefore, there are no related reports on nickel-plated black phosphorus nanosheets and their lubricating properties.

Method used

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  • Nickel-plated black phosphorus nanosheet lubricant and preparation method thereof
  • Nickel-plated black phosphorus nanosheet lubricant and preparation method thereof
  • Nickel-plated black phosphorus nanosheet lubricant and preparation method thereof

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Embodiment 1

[0026] First take 2g NiSO 4 ·6H 2 O was stirred and dissolved in 50mL of deionized water, and then 8g of sodium citrate and 6.5g of ammonium sulfate were added in turn, stirred and dissolved, and the preparation of the pre-plating solution was completed. Put 11.4mg of black phosphorus nanosheets into 10.15g of 2% silver-ammonia solution with a mass concentration of 2% and ultrasonically modify the surface for 20min, then centrifuge at 14,000rpm for 15min to collect the precipitate, wash it with absolute ethanol, and dry it in a vacuum environment at 60°C , to obtain modified black phosphorus nanosheets. Put the modified black phosphorus nanosheets into the previously prepared pre-plating solution and ultrasonicate for 30min, add 2.2g NaH 2 PO 2 ·H 2 O ultrasonically disperse for 15 minutes, adjust the pH of the solution to 9, heat and stir the reaction at 80°C, and stop heating when no bubbles are generated. After the solution is cooled, it is centrifuged at 4000rpm for 3...

Embodiment 2

[0030] Take 1.2g NiSO 4 ·6H 2 O was stirred and dissolved in 50mL of deionized water, and then 4.8g of sodium citrate and 3.9g of ammonium sulfate were added in turn, stirred and dissolved, and the plating solution was prepared. Put 11 mg of black phosphorus nanosheets into 10.15 g of 2% silver-ammonia solution with a mass concentration of 2% and ultrasonically modify the surface for 30 min, then centrifuge at 12,000 rpm for 20 min to collect the precipitate, wash it with absolute ethanol, and dry it in a vacuum environment at 60°C. The modified black phosphorus nanosheets were obtained. Put the modified black phosphorus nanosheets into the previously prepared plating solution and sonicate for 30 minutes, and add 1.32g NaH 2 PO 2 ·H 2 O ultrasonically disperse for 15 minutes, adjust the pH of the solution to 9, heat and stir the reaction at 80°C, and stop heating when no bubbles are generated. After the solution is cooled, it is centrifuged at 3000rpm for 20min, and the p...

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Abstract

The invention relates to a nickel-plated black phosphorus nanosheet lubricant and a preparation method of the nickel-plated black phosphorus nanosheet lubricant. Specifically, the surfaces of the black phosphorus nanosheets are plated with a nickel layer, the lamellar structure is still maintained, and the mol ratio between the black phosphorus and the nickel is 1:2.8-4.6. Compared with the conventional chemical nickel plating, the plated nickel layer evenly and controllably covers the surface of the black phosphorus nanosheets, combination is firm, and a unique nanometer compound lamellar structure is formed. The nickel-plated black phosphorus nanosheet lubricant can significantly improve the anti-friction and anti-wear effects of a friction pair in a heavy load environment and has important application value in the heavy load machine lubricating field.

Description

[0001] 1. Field of invention [0002] The invention relates to a nano-lubricant and a preparation method thereof, in particular to a nickel-plated black phosphorus nano-sheet lubricant and a preparation method thereof. [0003] 2. Background technology [0004] Lubricants play a very important role in improving the lubrication of moving parts of mechanical equipment, reducing the wear of friction parts and improving equipment efficiency. The development of new lubricants is of great significance for improving the lubrication efficiency of equipment and promoting the upgrading of machinery manufacturing industry, especially for heavy machinery and equipment Lubrication of key friction pairs is particularly important. [0005] In recent years, black phosphorus nanosheets have received more attention as an emerging two-dimensional material, mainly because of the special wrinkled layered structure endowing it with many superior properties. Lv et al [Tribology Letters,2018,66(2):61...

Claims

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Application Information

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IPC IPC(8): C23C18/36C23C18/18C10M125/24C10N30/06
CPCC10M125/24C10M2201/04C23C18/1882C23C18/36
Inventor 徐玉福胡苑华席贺余景源罗志恒姚路路
Owner HEFEI UNIV OF TECH