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Purple phosphorus nanosheet for lubricant as well as preparation method and application of purple phosphorus nanosheet

A technology of nano-sheets and lubricants, applied in the field of new nano-lubricating materials, can solve the problems of large size and thickness, large product size, uncontrollable, etc., and achieve the effects of making up for gaps in the friction field, good lubricating performance, and improving peeling efficiency

Active Publication Date: 2021-05-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its tribological potential as a lubricant remains untapped
[0004] In the current preparation methods of most two-dimensional material nanosheets, the mechanical exfoliation method is the main preparation method, but the mechanical exfoliation method has the disadvantages of large product size, low yield, and uncontrollable, which cannot meet the needs of practical applications.
At present, the size and thickness of purple phosphorus nanosheets obtained by mechanical exfoliation are too large, and it is difficult to obtain single-layer or thin-layer purple phosphorus nanosheets. Even if thin-layer purple phosphorus nanosheets can be obtained, there is still glue residue caused by multiple peelings Shortcomings

Method used

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  • Purple phosphorus nanosheet for lubricant as well as preparation method and application of purple phosphorus nanosheet
  • Purple phosphorus nanosheet for lubricant as well as preparation method and application of purple phosphorus nanosheet
  • Purple phosphorus nanosheet for lubricant as well as preparation method and application of purple phosphorus nanosheet

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Effect test

Embodiment 1

[0039] A preparation method of purple phosphorus nanosheets for lubricants, comprising the following steps:

[0040] Add 2 mg of purple phosphorus powder into 20 mL of ethanol to form a dispersion liquid, and under the protection of nitrogen, at a temperature of 25 ° C, a power of 135 W, and a frequency of 80 KHz, ultrasonic stripping in a water bath for 2 hours; after the ultrasonic wave is completed, the obtained dispersion liquid Centrifuge at 3000rpm for 30min to collect the supernatant; centrifuge the collected supernatant at 12000rpm for 30min, take the precipitate, and vacuum dry at 50°C for 12h to obtain purple phosphorus nanosheets.

[0041] The atomic force microscope image of the purple phosphorus nanosheets for lubricants prepared in this example is as follows figure 1 shown, from figure 1 It can be seen that this method can prepare nanosheets with a lateral size of 0.5-10 μm and a thickness of 5-70 nm; its friction force microscope images are shown in figure 2 ...

Embodiment 2

[0043] A preparation method of purple phosphorus nanosheets for lubricants, comprising the following steps:

[0044] Add 10 mg of purple phosphorus powder into 100 mL of ethanol to form a dispersion. Under the protection of nitrogen, at a temperature of 25 ° C, a power of 90 W, and a frequency of 80 KHz, the water bath is ultrasonically stripped for 2 hours; after the ultrasonic wave is completed, the obtained dispersion is Centrifuge at 3000rpm for 30min to collect the supernatant; centrifuge the collected supernatant at 12000rpm for 30min, take the precipitate, and vacuum dry at 50°C for 12h to obtain purple phosphorus nanosheets.

Embodiment 3

[0046] A preparation method of purple phosphorus nanosheets for lubricants, comprising the following steps:

[0047] Add 20mg of purple phosphorus powder into 200mL of isopropanol to form a dispersion liquid. Under the protection of nitrogen, at a temperature of 25°C, a power of 75W, and a frequency of 80KHz, the water bath is ultrasonically stripped for 3 hours; after the ultrasonication is completed, the obtained The dispersion liquid was centrifuged at 3000rpm for 30min, and the supernatant was collected; the collected supernatant was centrifuged at 12000rpm for 30min, and the precipitate was taken, and vacuum-dried at 50°C for 12h to obtain purple phosphorus nanosheets.

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Abstract

The invention provides a purple phosphorus nanosheet for a lubricant as well as a preparation method and application of the purple phosphorus nanosheet. The preparation method comprises the following steps: adding purple phosphorus powder into an organic solvent to obtain a dispersion liquid, and performing ultrasonic stripping on the obtained dispersion liquid in an inert gas atmosphere; and performing low-speed centrifugation, taking a supernate, performing ultracentrifugation, taking a precipitate, and performing vacuum drying to obtain the purple phosphorus nanosheet for the lubricant. According to the invention, a liquid phase stripping method is adopted to effectively strip a purple phosphorus crystal to obtain the purple phosphorus nanosheet; and the obtained nanosheet is controllable in size and has good lubricating performance.

Description

technical field [0001] The invention relates to a purple phosphorus nanosheet for a lubricant, a preparation method and application thereof, and belongs to the field of new nanometer lubricating materials. Background technique [0002] In mechanical systems, friction and wear can lead to component failures, reduced system life and high energy dissipation. Therefore, researchers have long sought ways to reduce the adverse effects of friction, including the use of large amounts of liquid lubricants and solid lubricants. Liquid lubricants reduce friction by preventing vigorous or frequent contact between sliding contact interfaces, or by forming low-shear, high-durability boundary films on friction surfaces. Compared with liquid lubricants, solid lubricants have higher stability when facing some extreme environments, such as high temperature, high pressure, high vacuum, strong radiation and other environments. Especially in microelectromechanical systems, liquid lubricants ar...

Claims

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Application Information

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IPC IPC(8): C01B25/00C01B25/02B82Y40/00C10M103/00C10M177/00C10N20/06C10N50/08
CPCC01B25/003C01B25/02B82Y40/00C10M103/00C10M177/00C10M2201/0436Y02P20/10
Inventor 李强张玉阁董明东刘倩
Owner SHANDONG UNIV
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