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Ti2CTx nanosheet for lubricant as well as preparation method and application of Ti2CTx nanosheet

A technology of nanosheets and lubricants, which is applied in the direction of lubricating compositions, base materials, titanium carbide, etc., can solve the problems of uneven corrosion, the difficulty of peeling off, and the lack of in-depth research on nanosheets, so as to increase the concentration and improve efficiency Effect

Active Publication Date: 2021-04-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as Chinese patent document CN107128922A discloses a kind of Ti 2 CT x Preparation method of flexible paper; first, dilute HCL and LiF were added to a polyethylene plastic beaker, and Ti was slowly added under magnetic stirring 2 For AlC powder, continue magnetic stirring. After the reaction, the product is washed and centrifuged with deionized water until the pH value of the supernatant is greater than 6; secondly, the obtained corrosion product is added to deionized water, ultrasonically stripped under the protection of flowing argon, and then Centrifuge to obtain exfoliated few-layer or single-layer Ti 2 CT x A stable colloidal suspension of nanosheets; finally, the above-mentioned colloidal suspension is suction-filtered with a nitrocellulose filter, and the obtained Ti-loaded 2 CT x The filter membrane of the film is vacuum-dried, and the film is automatically removed after drying to obtain a flexible Ti 2 CT x paper; obtained Ti 2 CT x It has excellent performance in electrochemistry, but the above method cannot effectively strip Ti 2 CT x The problem of nanosheets, the resulting flexible paper has a micron-scale thickness, which cannot be applied to the preparation of nanoscale devices; and the Ti obtained by hydrogen fluoride corrosion 2 CT x Inhomogeneous corrosion often occurs, and there is still a combination of sheets, which has not reduced the difficulty of peeling, especially for single-layer and thin-layer Ti. 2 CT x Methods for preparing nanosheets are still lacking
[0005] Although currently for Ti 2 CT x A lot of research has been done on the electrical, thermal, optical, electromagnetic, sensing and other characteristics of Ti 2 CT x The research on the tribological behavior of nanosheets has not been in-depth, and Ti 2 CT x The application of nanosheets in the field of lubrication is still unsolved

Method used

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  • Ti2CTx nanosheet for lubricant as well as preparation method and application of Ti2CTx nanosheet
  • Ti2CTx nanosheet for lubricant as well as preparation method and application of Ti2CTx nanosheet
  • Ti2CTx nanosheet for lubricant as well as preparation method and application of Ti2CTx nanosheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Ti with lubricant2CTxPreparation method of nanoflakes, steps below:

[0032]2mg commercial TI2CTxThe powder was placed in 5 ml of isopropyl alcohol, soaked at 25 ° C for 15 min, then centrifuged at 3500 rpm to 30 min, and the precipitate was dried at 25 ° C under a vacuum environment; under nitrogen protection, the obtained powder was placed in 25 ml DMSO, Ultrasonic peeling at a frequency of 80 kHz and a power of 120W, a temperature of 25-30 ° C, then centrifuged at 8000 rpm spin at 8000 rpm to 25 ° C for 24 hours under a vacuum environment, resulting in Ti2CTxNanosheets.

[0033]TI for lubricants prepared in this example2CTxNanoflane atomic force microscope imagefigure 1 As shown, it can be seen from the image, the nano film thickness of ultracence centrifugation and ultrasonic stripping is 10-50 nm, and the lateral dimension is 10 μm; its friction image isfigure 2 As shown, the friction is smaller than the substrate, which has a lubrication; the friction coefficient is 0.06.

Embodiment 2

[0035]Ti with lubricant2CTxPreparation method of nanoflakes, steps below:

[0036]2mg commercial TI2CTxThe powder was placed in 5 ml of deionized water, soaked at 25 ° C for 15 min, then centrifuged at 3500 rpm to 25 ° C under a vacuum environment at 25 ° C; under nitrogen protection, the obtained powder was placed in 25 ml of acetone, in frequency It was 80 kHz, and the power was 120W, and the ultrasonic strip was performed under the temperature of 25-30 ° C, then centrifuged at 8000 rpm rotation for 1 h, precipitated, 25 ° C for 48 h at a vacuum environment, resulting in Ti2CTxNanosheets.

Embodiment 3

[0038]Ti with lubricant2CTxPreparation method of nanoflakes, steps below:

[0039]5mg TI2CTxThe powder was placed in 10 ml of ethanol, soaked at 25 ° C for 15 min, then centrifuged at 4000 rpm spins for 30 min, and the precipitated was dried at 25 ° C under a vacuum environment; under nitrogen protection, the obtained powder was placed at 50 ml of mass fraction of 50%. In the urea aqueous solution, ultrasonic stripping 1 h was performed at a frequency of 45 kHz and a power of 300 W, a temperature of 25-30 ° C, and then centrifuged at 10000 rpm to 1 h at a 10,000 rpm, and the deposition was taken at 25 ° C under a vacuum. TI.2CTxNanosheets.

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Abstract

The invention provides a Ti2CTx nanosheet for a lubricant as well as a preparation method and application of the Ti2CTx nanosheet. The preparation method comprises the following steps: soaking Ti2CTx powder in a solvent, and then carrying out ultracentrifugation and vacuum drying to obtain pretreated Ti2CTx powder; under the protection of inert gas atmosphere, placing the pretreated Ti2CTx powder is in an intercalating agent for ultrasonic stripping, then conducting ultracentrifugation immediately, collecting the precipitate and performing vacuum drying to prepare the Ti2CTx nanosheet for the lubricant. By means of the method, Ti2CTx can be effectively stripped to obtain the nanosheet, the size of the nanosheet is controllable, and meanwhile the nanosheet has good lubricating performance.

Description

Technical field[0001]The present invention relates to a lubricant Ti2CTxNanoflane and its preparation method and application, belong to the field of nanomaterial lubrication.Background technique[0002]In recent years, micro-nano devices have a huge potential value in the field of aerospace, environmental energy and biomedicine; due to their sharp decrease, resulting in rapid specific surface area, making the table / interface problem more significant, so friction With wear has an important factor in restricting the development of micro-nano devices, while conventional liquid lubricants do not act in new micro-nano devices.[0003]The two-dimensional laminated material has been widely concerned by the scientific research in scientific research due to its unique nature and great application potential. Since the first two-dimensional material-graphene is found, more and more materials have been added to this race. The two-dimensional layer nanomaterial has a special anisotropic property, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/921C10M103/06C10N30/06C10N50/08
CPCC01B32/921C10M103/06C01P2006/80C01P2004/64C01P2004/61C01P2004/04C01P2004/20C01P2004/62C01P2004/01
Inventor 董明东刘倩李强张玉阁
Owner SHANDONG UNIV