Unlock instant, AI-driven research and patent intelligence for your innovation.

Nano titanium dioxide/black phosphorus nanosheet composite lubricant and preparation method thereof

A technology of nano-titanium dioxide and composite lubricants, applied in lubricating compositions, additives, petroleum industry, etc., can solve the problems of affecting the film-forming effect of black phosphorus nanosheets, high cost of preparation of black phosphorus nanosheets, and lack of regularity recognition. Achieve superior high-load anti-friction lubrication effect, good product controllability, and guarantee anti-friction lubrication performance

Active Publication Date: 2019-08-23
HEFEI UNIV OF TECH
View PDF13 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have found that the lubricating effect of black phosphorus nanosheets is not only related to its sliding effect, but also related to its friction interface film formation [Xu Y.F., Yu J.Y., Dong Y.H., et al, ASME Journal of Tribology, 2019, 141(7): 072101.], especially in the high-load environment (contact stress above 1.67GPa), the lubricating performance needs to be further improved. In addition, due to the high preparation cost of black phosphorus nanosheets, it limits its advantages. Therefore, it is necessary to improve the black phosphorus nanosheets. Anti-friction and lubrication performance of phosphorus nanosheets in high-load environment and reduce its use cost
[0006] Lee et al [Lee H.U., Lee S.C., Won J., et al, Scientific Report, 2015, 5:8691] wrapped titanium dioxide between black phosphorus nanosheets and found that its photocatalytic activity was not affected by temperature and pH, but Does not involve its lubricating effect
Since this combination method will affect the film-forming effect of black phosphorus nanosheets on the friction interface, in addition, there is no regular understanding of the control of the crystal form, particle size or thickness, combination ratio, and combination method of the two. How to combine nanosheets The micro-nano ball action of titanium dioxide and the layered sliding action of black phosphorus nanosheets play a synergistic lubrication effect, especially improving the anti-friction and lubrication performance of black phosphorus nanosheets under high-load environments, which has not been reported yet.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nano titanium dioxide/black phosphorus nanosheet composite lubricant and preparation method thereof
  • Nano titanium dioxide/black phosphorus nanosheet composite lubricant and preparation method thereof
  • Nano titanium dioxide/black phosphorus nanosheet composite lubricant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 40mg of black phosphorus powder in 300mL NMP solution and heat and stir at 140°C for 12h. After the solution is cooled, centrifuge at 3000rpm for 30min, take the supernatant and centrifuge at 12000rpm for 30min to get the precipitate, and dry it at 60°C in a vacuum environment. Obtained black phosphorus nanosheets. Add 5 mg of black phosphorus nanosheets to 50 mL of absolute ethanol, add 1 mL of acetic acid to the solution, and stir at 200 r / min. Add 5.3 mg of titanium tetraisopropoxide and 1 mL of deionized water dropwise to the solution at a rate of 2 drops / s, continue stirring for 1 h after the addition is complete, centrifuge the resulting solution at 12,000 rpm for 30 min, and take the precipitate. Rinse three times with deionized water until neutral, and finally bake the product at 55° C. for 12 hours in a vacuum environment to obtain a nano-titanium dioxide / black phosphorus nanosheet composite lubricant.

[0025] It can be seen from Figure 1(a) that spherica...

Embodiment 2

[0028] Put 30mg of black phosphorus powder in 320mL NMP solution, heat and stir at 150°C for 10h, after cooling the solution, centrifuge at 4000rpm for 22min, take the supernatant and centrifuge at 14000rpm for 20min to get the precipitate, dry at 60°C in a vacuum environment, and get Black phosphorus nanosheets. Add 5mg of black phosphorus nanosheets to 60mL of absolute ethanol and add 2mL of acetic acid to the solution, stir evenly at a speed of 400r / min, then add 10.7mg Titanium tetraisopropoxide and 2mL deionized water, continue to stir for 1.5h after the dropwise addition, centrifuge the resulting solution at 14000rpm for 28min, take the precipitate, wash it with deionized water 3 times until neutral, and finally obtain the product Baking at 60° C. for 12 hours in a vacuum environment yields nano-titanium dioxide / black phosphorus nanosheet composite lubricant.

[0029] In order to detect the lubricating effect of the present invention, the simple mixture of nano-titanium...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a nano titanium dioxide / black phosphorus nanosheet composite lubricant and a preparation method thereof. In the composite lubricant, the mass ratio of nano titanium dioxide toblack phosphorus nanosheets is (0.05-0.8):1, and titanium dioxide is of an amorphous state spherical structure, has a particle size of 10-30nm, and is uniformly distributed on the surfaces of the black phosphorus nanosheets. The preparation method of the composite lubricant is simple, convenient and good in controllability. The composite lubricant disclosed by the invention is good in lubricationproperty, is capable of remarkably improving the wearing reduction lubrication property of a friction pair in a high-load environment, and is applicable to fields such as oil lubrication and powder lubrication of heavy mechanical equipment.

Description

[0001] Field of invention: [0002] The invention relates to a nano-lubricant and a preparation method thereof, in particular to a nano-titanium dioxide / black phosphorus nanosheet composite lubricant and a preparation method thereof. [0003] Background technique: [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 the machinery manufacturing industry. Layered materials can play a sliding role in the friction process and thus exert a lubricating effect, while zero-dimensional nanomaterials exert a lubricating effect through the action of micro-balls. The lubricating effect has become a research and development hotspot in the field of nano lubricants. [0005] In recent years, researchers have develop...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/00C10N30/06
CPCC10M125/00C10M2201/04C10M2201/062C10N2030/06
Inventor 徐玉福罗志恒余景源陈星茹昱东尤涛
Owner HEFEI UNIV OF TECH