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Ultra-low friction coefficient self-lubricating coating and preparation method thereof

A self-lubricating coating, ultra-low friction technology, used in coatings, microsphere preparation, microcapsule preparations, etc., can solve problems such as poor lubrication performance and high wear rate, improve lubrication performance, broaden application fields, avoid The effect of the ploughing effect

Active Publication Date: 2019-12-13
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Since the beginning of the 21st century, high-tech fields such as nuclear industry, aerospace, ocean engineering, and military equipment have continuously developed in the direction of light weight, intelligence, and long life. Friction parts of mechanical products such as gears, bearings, and seals The problem of friction and wear under a series of harsh working conditions of ultra-high vacuum and strong radiation has become increasingly prominent. The current solid self-lubricating coating has many defects such as poor lubrication performance and high wear rate.
However, traditional lubricating materials such as lubricating oil and grease are difficult to meet the operating conditions of the system, coupled with the objective requirements of environmental protection for energy saving and material saving, so the research on the friction and lubricating properties of self-lubricating coatings is facing great challenges

Method used

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  • Ultra-low friction coefficient self-lubricating coating and preparation method thereof
  • Ultra-low friction coefficient self-lubricating coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] (1) Microcapsules whose core material is polyalphaolefin (abbreviation: PAO6) and wall material is polystyrene (abbreviation: PS) are prepared by solvent evaporation method.

[0037] 4g PAO6 and 2g PS were added to 40mL of dichloromethane solvent and mixed, magnetically stirred evenly to obtain solution A, the mass fraction of dichloromethane in solution A was 89.83%, and the mass percentage of lubricant and polymer was 1:0.5. Prepare 200 mL of a mixed aqueous solution B of gelatin and polyvinyl alcohol, wherein the mass fraction of gelatin is 0.2%, and the mass fraction of polyvinyl alcohol is 0.5%. Under the condition of mechanical stirring at 600rpm, the above-mentioned solution A was added to solution B at one time to form a microemulsion. The mass percentage of solution A and solution B in the microemulsion was 1:4, and the microemulsion was reacted at 45°C for 4h to completely dichloromethane Volatilize, collect after filtration, rinse repeatedly with deionized wa...

Embodiment 2

[0043] (1) Nanocapsules with core material of linseed oil and wall materials of PS and polyvinyl acetate were prepared by solvent evaporation method.

[0044] Add 6g linseed oil, 2g PS, and 0.5g polyvinyl acetate into 60mL of chloroform and mix, magnetically stir to obtain solution A evenly, the mass fraction of chloroform in solution A is 91.37%, the mass fraction of lubricant and polymer The percentage is 1:1.42. Prepare 200 mL of polyvinyl alcohol aqueous solution B with a mass fraction of 0.5%. Under the condition of mechanical stirring at 800rpm, the above-mentioned solution A was added to solution B at one time to form a microemulsion. The mass percentage of solution A and solution B in the microemulsion was 1:3, and the microemulsion was reacted at 45°C for 4h to make the chloroform Volatilize, collect after filtration, rinse repeatedly with deionized water, and dry at 25°C for 24 hours to obtain nanocapsules containing linseed oil. The prepared nanocapsules were char...

Embodiment 3

[0050] (1) Microcapsules whose core material is synthetic lubricating oil (abbreviation: SNOw-20) and wall material is PS are prepared by solvent evaporation method.

[0051] Add 2g SNOw-20 and 2g PS to 50mL of dichloromethane solvent and mix, magnetically stir to obtain solution A evenly, the mass fraction of dichloromethane in solution A is 94.31%, the mass percentage of lubricant and polymer is 1:1 . Prepare 200 mL of a mixed aqueous solution B of Tween 80 and gum arabic, wherein the mass fraction of Tween 80 is 1%, and the mass fraction of gum arabic is 0.1%. Under the condition of mechanical stirring at 700rpm, the above-mentioned solution A was added to solution B at one time to form a microemulsion. The mass percentage of solution A and solution B in the microemulsion was 1:4, and the microemulsion was reacted at 35°C for 4h to completely Volatilize, collect after filtration, rinse repeatedly with deionized water, and dry at 25°C for 24 hours to obtain PS microcapsules...

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Abstract

The invention discloses an ultra-low friction coefficient self-lubricating coating and a preparation method thereof in the technical field of self-lubricating composite materials. The self-lubricatingcoating is composed of, in percent by mass, 20-85% of resin, 0.1-50% of a reinforcing phase and 1-35% of a lubricating phase, wherein the lubricating phase includes a lubricant-containing capsule. The current problem that lubricating oil is applied to lubrication on a friction interface in the prior art is solved, the coating exhibits the characteristic of oil lubrication in the lubrication process, and meanwhile multiple shortcomings of an external oil lubrication system are overcome, so that the application areas of the resin-based coating are enriched and widened.

Description

technical field [0001] The invention belongs to the technical field of self-lubricating composite materials, in particular to an ultra-low friction coefficient self-lubricating coating and a preparation method thereof. Background technique [0002] Since the beginning of the 21st century, high-tech fields such as nuclear industry, aerospace, ocean engineering, and military equipment have continuously developed in the direction of light weight, intelligence, and long life. Friction parts of mechanical products such as gears, bearings, and seals The problem of friction and wear under a series of harsh working conditions such as ultra-high vacuum and strong radiation has become increasingly prominent. The current solid self-lubricating coating has many defects such as poor lubrication performance and high wear rate. However, traditional lubricating materials such as lubricating oil and grease are difficult to meet the operating conditions of the system, coupled with the objecti...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D161/06C09D7/61C09D7/65B01J13/06B82Y40/00B82Y30/00
CPCB01J13/06B82Y30/00B82Y40/00C08L2205/03C08L2205/035C09D7/61C09D7/70C09D161/06C09D163/00C08L25/06C08L23/00C08K7/06C08L31/04C08L91/00C08K7/14C08K3/042C08K3/34C08L33/12C08L91/06
Inventor 张琳解国新雒建斌
Owner TSINGHUA UNIV
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