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Low-friction wear-resistant composite material with microfibrillated structure as well as preparation method and application of low-friction wear-resistant composite material

A composite material and low-friction technology, which is applied in the field of low-friction and wear-resistant composite materials and its preparation, can solve the problems of reducing the performance and applicability of friction materials, poor bonding between matrix materials and fillers, and difficulty in reducing friction coefficient and wear. , to achieve the effect of good application prospect, good mechanical strength and excellent wear rate

Active Publication Date: 2021-02-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These problems have greatly reduced the performance and applicability of friction materials
(2) Add solid lubricating fillers, such as molybdenum disulfide, graphite, polytetrafluoroethylene, etc., to the polymer matrix to improve the tribological properties of composite materials, but a large amount of fillers need to be added, and there is a bonding force between the matrix material and the filler poor problem
However, it is still difficult to reduce the friction coefficient and wear. How to improve the utilization efficiency of lubricating fillers is worthy of deep consideration and exploration by researchers.

Method used

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  • Low-friction wear-resistant composite material with microfibrillated structure as well as preparation method and application of low-friction wear-resistant composite material
  • Low-friction wear-resistant composite material with microfibrillated structure as well as preparation method and application of low-friction wear-resistant composite material
  • Low-friction wear-resistant composite material with microfibrillated structure as well as preparation method and application of low-friction wear-resistant composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1, the preparation of the low-friction and wear-resistant composite material of the present invention

[0063] All raw materials were dried in an oven at 80 °C for 12 h before use. Weigh the PPS, PA66 and PTFE powder raw materials according to the mass ratio, and the mass ratio of PPS, PA66 and PTFE powder raw materials is 66.5:28.5:5. The raw materials are mixed by a high-speed mixer (rotating speed 20000r / min). Parallel twin-screw extruder is used for extrusion granulation, the extrusion granulation temperature is 300°C, and the screw speed is 50-80r / min to obtain masterbatch, which is dried for use.

[0064] Then prepare low-friction and wear-resistant composite materials by injection molding machine, adopt conventional injection molding, the conditions of conventional injection molding: injection molding temperature is 300 ℃, holding time is 15s, shear rate is 10-10 2 the s -1 . The low-friction and wear-resistant composite material of the present inv...

Embodiment 2

[0065] Embodiment 2, the preparation of the low-friction and wear-resistant composite material of the present invention

[0066] All raw materials were dried in an oven at 80 °C for 12 h before use. Weigh PPS, PA66 and PTFE powder raw materials according to the mass ratio, and the mass ratio of PPS, PA66 and PTFE powder raw materials is 63:27:10. The raw materials are mixed by a high-speed mixer (rotating speed 20000r / min). Parallel twin-screw extruder is used for extrusion granulation, the extrusion granulation temperature is 300°C, and the screw speed is 50-80r / min to obtain masterbatch, which is dried for use.

[0067] Then prepare low-friction and wear-resistant composite materials by injection molding machine, adopt conventional injection molding, the conditions of conventional injection molding: injection molding temperature is 300 ℃, holding time is 15s, shear rate is 10-10 2 the s -1 . The low-friction and wear-resistant composite material of the present invention ...

Embodiment 3

[0068] Embodiment 3, the preparation of the low-friction and wear-resistant composite material of the present invention

[0069] All raw materials were dried in an oven at 80 °C for 12 h before use. Weigh PPS, PA66 and PTFE powder raw materials according to the mass ratio, and the mass ratio of PPS, PA66 and PTFE powder raw materials is 59.5:25.5:15. The raw materials are mixed by a high-speed mixer (rotating speed 20000r / min). Parallel twin-screw extruder is used for extrusion granulation, the extrusion granulation temperature is 300°C, and the screw speed is 50-80r / min to obtain masterbatch, which is dried for use.

[0070] Then prepare low-friction and wear-resistant composite materials by injection molding machine, adopt conventional injection molding, the conditions of conventional injection molding: injection molding temperature is 300 ℃, holding time is 15s, shear rate is 10-10 2 the s -1 . The low-friction and wear-resistant composite material of the present invent...

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Abstract

The invention provides a low-friction wear-resistant composite material with a microfibrillated structure as well as a preparation method and application thereof, and belongs to the field of polymer composite materials. The low-friction wear-resistant composite material is prepared from the following raw materials in parts by weight: 50-70 parts of thermoplastic resin, 20-40 parts of nylon and 1-30 parts of lubricating filler. The composite material has extremely low friction coefficient and wear rate, and has the advantages of self-lubrication, lower friction, higher wear resistance and higher mechanical strength compared with a wear-resistant composite material similar to the prior art. The thermoplastic resin / PA / PTFE fiber composite system can obtain an extremely low friction coefficient and an extremely low wear rate through extremely high shear injection molding, and meanwhile, the thermoplastic resin / PA / PTFE fiber composite system has excellent mechanical strength. The low-friction wear-resistant composite material has extremely low friction coefficient and excellent wear resistance, can be used in the fields of aerospace, military equipment, civil mechanical equipment and the like, can be used for preparing wear-resistant bearings, self-lubricating parts, mechanical liners and other parts under dry friction conditions, and has favorable application prospects.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a low-friction and wear-resistant composite material with a microfibrillated structure, a preparation method and application thereof. Background technique [0002] According to statistics, about 30% to 50% of the world's energy consumption is in various forms of friction and wear. Long-term friction leads to wear and tear of parts, which is an important reason for the short service life of various equipment and the unstable operation of equipment. Therefore, reducing various forms of wear and improving the lubricating properties of materials have become important measures to save energy, improve work efficiency and improve equipment reliability. For a long time, researchers have carried out a lot of research work on the modification of friction materials. Compared with traditional metal materials, polymer materials are widely used due to their light weight, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/02C08L77/06C08L27/18
CPCC08L81/02C08L2205/03C08L2205/16C08L77/06C08L27/18
Inventor 邹华维石优周生态白杨
Owner SICHUAN UNIV
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