A kind of lubricating additive based on mxene@cofs/liquid metal and its preparation method, application and composite material

A technology of lubricating additives and liquid metals, applied in the direction of additives, lubricating compositions, petroleum industry, etc., can solve the problems of high wear rate and large friction coefficient of composites, and achieve the effect of reducing friction coefficient and wear rate

Active Publication Date: 2022-07-01
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides a lubricating additive based on MXene@COFs / liquid metal and its preparation method, application and composite material to solve the friction coefficient of the complex after the current lubricating additive is combined with the matrix Problems with large and high wear rates

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  • A kind of lubricating additive based on mxene@cofs/liquid metal and its preparation method, application and composite material

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Experimental program
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preparation example Construction

[0028] The invention provides a preparation method based on MXene@COFs / liquid metal-based lubricating additive, comprising the following steps:

[0029] First, 1 part of the synthesized COFs and 0.01-1 part of MXene were added to solvent A for thorough mixing, and then the above dispersion was stirred at room temperature 15-40 °C for 1 h to make it uniformly dispersed, and then placed in vacuum drying After drying in the oven (the temperature is set at 40-100 °C, and the drying time is 3-12 h), the solvent is removed, and the COFs material is supported on the surface of MXene, that is, the MXene@COFs composite nanoparticles. Secondly, the liquid metal is placed at a pH of 13-15. 20 parts of the pretreated liquid metal and 1 to 4 parts of MXene@COFs composite nanoparticles were added to solvent B according to the ratio, and ultrasonicated in a protective atmosphere. 2h. Next, the larger particles in the mixture were removed by low-speed centrifugation (1000 rmp, 5 min), and th...

Embodiment 1

[0043] 1) First, combine 1 part of the synthesized COFs with 0.01 part of Ti 3 C 2 MXene was added to the ethanol solution for thorough mixing, and the above dispersion was stirred at room temperature for 1 h to make it dispersed uniformly, and then placed in a vacuum drying oven to dry at 60 °C for 6 h to obtain COFs supported on Ti. 3 C 2 MXene surface (Ti 3 C 2 MXene@COFs composite nanoparticles). Next, the gallium-indium alloy was stirred in an alkaline KOH solution with a pH value of 13 for 30 minutes to remove the oxide scale, and then 20 parts of the pretreated gallium-indium alloy and 1 part of Ti were mixed with 3 C 2 The MXene@COFs composite nanoparticles were added to the ethanol solution and sonicated for 2 h under argon protection. Then, the larger particles in the mixture were removed by low-speed centrifugation (1000rmp, 5min), and the supernatant was further centrifuged (10000rmp, 5min) to obtain Ti 3 C 2 MXene@COFs / GaIn alloy composite nanoparticl...

Embodiment 2

[0047] 1) First, combine 1 part of the synthesized COFs with 1 part of V 2 The C MXene was added to the propanol solution for thorough mixing, and then the above dispersion was stirred at room temperature for 1 h to make it dispersed uniformly, and then placed in a vacuum drying box to dry at 80 °C for 5 h to obtain the COFs material supported on V 2 C MXene surface (V 2 C MXene@COFs composite nanoparticles). Next, the gallium-tin alloy was placed in an alkaline NaOH solution with a pH value of 13 and stirred for 30 minutes to remove the oxide scale, and then 20 parts of the pretreated gallium-tin alloy and 4 parts of V 2 The C MXene@COFs composite nanoparticles were added to the ethanol solution and sonicated for 2 h under nitrogen protection. Then, the larger particles in the mixture were removed by low-speed centrifugation (1000rmp, 5min), and the supernatant was further centrifuged (10000rmp, 5min) to obtain V 2 C MXene@COFs / gallium-tin alloy composite nanoparticles. F...

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Abstract

The invention discloses a MXene@COFs / liquid metal-based lubricating additive and a preparation method, application and composite material thereof, comprising the following steps: mixing COFs and MXene in solvent A to obtain a dispersion, and drying the dispersion to obtain MXene@ COFs composite nanoparticles; liquid metal is pretreated, and then the pretreated liquid metal and MXene@COFs composite nanoparticles are added in solvent B to obtain a mixture, and the supernatant of the mixture is centrifuged to obtain MXene@COFs / liquid metal composite Nanoparticles, dried to obtain MXene@COFs / liquid metal based lubricating additive. The lubricating additive capable of reducing friction and resisting wear obtained by the preparation method of the present invention can play a very positive role in prolonging the service life of materials and mechanical equipment and the like.

Description

technical field [0001] The invention belongs to the technical field of lubrication, in particular to an MXene@COFs / liquid metal-based lubricating additive and a preparation method, application and composite material thereof. Background technique [0002] It is estimated that about one third of the world's energy is currently consumed in various forms of friction and wear. Doing a good job in friction lubrication is an important way to save energy and improve economic benefits. Therefore, the research on friction and wear is of great significance. At present, the commonly used method is to use lubricating additives to reduce friction and wear, which is also one of the most effective measures, including adding liquid lubricating oil, lubricating grease or solid lubricant. Among them, the common solid lubricants are metal compounds (such as: Al 2 O 3 , Fe 3 O 4 , MoS 2 etc.) and carbon-based lubricating fillers (such as graphite, graphene, carbon nanotubes, etc.). Howev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M163/00C10M169/04C10M167/00C10N30/06
CPCC10M163/00C10M169/045C10M167/00C10M2201/061C10M2201/05C10M2205/0206C10M2217/04
Inventor 刘超李茜郝丽芬张磊殷青鲍艳
Owner SHAANXI UNIV OF SCI & TECH
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