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Wear-resistant liquid metal polymer self-lubricating composite material

A liquid metal, composite material technology, applied in other chemical processes, chemical instruments and methods, etc., to achieve the effect of simple and controllable process operation, reducing the risk of leakage, and avoiding thermal failure

Active Publication Date: 2021-05-11
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on adding liquid metal to the antifriction polymer composite material to improve the material performance, and how to realize the effective filling of liquid metal and polymer material is also a problem that needs to be solved

Method used

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  • Wear-resistant liquid metal polymer self-lubricating composite material
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  • Wear-resistant liquid metal polymer self-lubricating composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11

[0043] First put 1g of Bi 44.7 Cd 5.3 In 19.1 Pb 22.6 sn 8.3 Add it to 5g of 50mmol / L gamma-(2,3-glycidoxy)propyltrimethoxysilane methanol solution, put it in a hot water bath at 60°C, ultrasonic frequency is 50KHz, and ultrasonicate for 2h at 80% ultrasonic power to obtain Liquid metal microspheres with an average diameter of 0.2 μm. Then 18g of polyether ether ketone, 5g of carbon fiber and the previous liquid metal particles were wet mixed and stirred, and the mixture was dried at 105° C. for 3 hours to obtain a dry mixture powder. The powder was placed in a stainless steel mold, kept at 300°C for 40 minutes, then hot-pressed at 50 MPa for 1 hour at this temperature, and then cold-pressed at 280°C for 20 minutes to obtain a wear-resistant liquid metal polymer self-lubricating composite material. The friction and wear performance is tested by MPX-2000 friction and wear testing machine, the load is 200N, the speed is 1.4m / s, and the test time is 2h.

Embodiment 21

[0053] First, 0.3g of Bi 32.5 In 51 sn 16.5 Add to 0.3g 80mmol / L dodecanethiol acetone solution, heat bath at 70°C, ultrasonic frequency 40KHz, ultrasonication at 75% ultrasonic power for 1.5h, to obtain liquid metal microspheres with an average diameter of 1.5μm. Then 17.7g of polyether ether ketone, 2g of glass fiber and the previous liquid metal particles were wet mixed and stirred, and then the mixture was dried at 102°C for 2 hours to obtain a dry mixture powder. The powder was placed in a stainless steel mold, kept at 320°C for 50 minutes, then hot-pressed at 72MPa for 2 hours at this temperature, and then cold-pressed at 280°C for 15 minutes to obtain a wear-resistant liquid metal polymer self-lubricating composite material. The test method is the same as in Example 1.1.

Embodiment 31

[0063] First, 0.48g of Bi 33 In 67 Add to 3.2g 65mmol / L octadecanethiol ethanol solution, heat bath at 80°C, ultrasonic frequency 48KHz, ultrasonication at 65% ultrasonic power for 0.5h, to obtain liquid metal microspheres with an average diameter of 2.1μm. Then 25.12g of polyether ether ketone, 6.4g of aramid fibers and the previous liquid metal particles were wet mixed and stirred, and the mixture was dried at 108°C for 3 hours to obtain a dry mixture powder. Put the powder in a stainless steel mold, keep it at 350°C for 46min, then hot press at 54MPa for 1.5h at this temperature, then lower it to 270°C and then cold press for 28min to obtain liquid metal reinforced polyetheretherketone wear-resistant self-lubricating composite material. The test method is the same as in Example 1.1.

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Abstract

The invention discloses a wear-resistant liquid metal polymer self-lubricating composite material. The composite material comprises polyether-ether-ketone and liquid metal. In the friction process, the liquid metal absorbs friction heat and is changed into liquid through phase change, and a transfer film is formed between a polymer matrix and a friction pair. In the friction process of the material, friction heat can be taken away in time due to phase change heat absorption, and a stable liquid metal transfer film can be formed when the internal liquid metal lubricating grease is extruded by a load and is exposed out of a contact surface, so that direct contact of a friction surface is blocked, the friction coefficient of the composite material is effectively reduced, and the wear resistance of the material is improved. The material can be applied to sealing elements under high-temperature, high-pressure and high-speed working conditions.

Description

technical field [0001] The invention relates to a novel wear-resistant self-lubricating composite material, in particular to a wear-resistant liquid metal polymer self-lubricating composite material, and a preparation method thereof. Background technique [0002] The advancement of industrialization poses more severe challenges to the temperature and wear resistance of polymer materials. In order to meet the needs of equipment parts under different working conditions, composite materials with high thermal conductivity and good wear resistance are required. Wear-resistant self-lubricating materials can effectively reduce the friction coefficient and wear of materials by virtue of the material itself or the formation of transfer film, and polymer-based self-lubricating composite materials have been used as wear-resistant and heat-resistant parts in light industry and heavy machinery industries. a wide range of applications. Taking polyetheretherketone as an example, polyether...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/16C08L77/10C08L79/08C08K7/06C08K9/06C08K3/08C08K7/18C08K9/04C08K7/14C09K3/10
CPCC08K7/06C08K9/06C08K3/08C08K7/18C08K9/04C08K7/14C08L61/16C09K3/10C08L2205/16C08L77/10C08L79/08
Inventor 穆立文董礼松冯新朱家华陆小华
Owner NANJING UNIV OF TECH
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