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Novel polyetheretherketone self-lubricating hard wearing compound material and method for preparing same

A technology of polyether ether ketone and composite materials, which is applied in the direction of lubricating compositions, etc., can solve the problems of large strength loss, high wear rate of composite materials, and can not meet the application of friction reduction and wear resistance, so as to reduce friction and improve wear resistance , high-strength effect

Inactive Publication Date: 2009-11-18
DAQING GASOLINEEUM INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since only easily decomposable polyethylene glycol, citric acid, etc. are used to directly compound pores with polyimide, the strength loss is large (from 90MPa to 35MPa), and the wear rate of the composite material is high, which cannot meet high load, Anti-friction and wear-resistant applications at high speeds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Select 60g of PEEK powder, the tensile strength of the polyetheretherketone resin is 80-120MPa, 15g of citric acid (purity 99.5%), 10g of polytetrafluoroethylene, 15g of short carbon fibers are mixed by wet method for 15min to obtain a mixture, and dried. The dried mixed powder is packed into a mold and cold-pressed at a pressure of 35MPa. Keep warm for 3 hours at 180°C, keep warm for 1 hour at 320°C, keep warm for 3 hours at 365°C, and cool down naturally. The pores were cleaned with ethanol, and the micropore porosity of the obtained material was 20.5%. Vacuum impregnation with lithium-based grease (8 hours) at 220° C. and 0.02 bar to obtain a PEEK composite material with a grease content of 20.5%. The friction and wear performance of the material was tested on the MPX-2000 friction and wear testing machine, 200N, 1.4m / s, and the test time was 2 hours.

Embodiment 2

[0028] 65g of PEEK powder, 10g of polyethylene glycol (purity 99.5%), 15g of polytetrafluoroethylene, and 10g of glass fiber were mixed by a wet method for 15 minutes to obtain a mixture, and dried. The dried mixed powder is packed into a mold, and cold-pressed at a pressure of 40 MPa. The sintering process is the same as in Example 1. The pores were washed with ethanol, and the micropore porosity of the obtained material was 16.5%. At 200°C and 0.1 bar, the bentonite grease was vacuum impregnated for 12 hours to obtain a PEEK composite material with a fat content of 16.5%. The friction and wear performance test method is the same as in Example 1.

Embodiment 3

[0034] 90g of PEEK powder and 5g of methyl cellulose (99.5% purity) were selected, wet mixed for 10min, and dried. The dried mixed powder is compounded with 5g carbon fiber cloth, and cold-pressed at a pressure of 110MPa. The sintering process is the same as in Example 1. The pores were cleaned with ethanol, and the micropore porosity of the obtained material was 5.5%. Vacuum impregnated with dimethyl silicone oil at 250° C. and 0.05 bar for 6 hours to obtain a PEEK self-lubricating composite material with an oil content of 5.5%. The friction and wear test conditions are the same as in Example 1, the coefficient of friction is 0.088, and the wear rate is 3.46×10 -15 m 3 / (N·m).

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Abstract

The invention provides a novel polyetheretherketone (PEEK) compound material which is prepared by taking the porous PEEK compound material as matrixes and filling the pores thereof with lubricating grease; wherein, the porous PEEK matrix is prepared from the following components by the weight percentage: 45% to 90% of PEEK powder, 0% to 30% of polytetrafluoroethylene (PTFE) powder, 5% to 40% of reinforcing fiber and 5% to 49% of pore-forming agent; the porosity of the matrix is 5% to 35%, the pore diameter ranges from 0.05 mum to 10 mum, the average pore size is 1.0 mum, and the tensile strength thereof is 45MPa to 90MPa. The invention further provides a method for preparing the PEEK compound material. By forming a lubricating oil film on friction surfaces of the material so as to have good lubricating effect, thereby remarkably reducing the friction coefficient thereof and improving the wear resistance thereof; and the material is suitable for reducing and resisting friction within high-temperature, vacuum, radiation, corrosion and other special environments and capable of greatly prolonging the service life of devices.

Description

Technical field: [0001] The invention relates to a new self-lubricating and wear-resistant composite material, in particular to a polyetheretherketone self-lubricating and wear-resistant composite material, and simultaneously provides its preparation method. Background technique: [0002] With the increase in the requirements for the temperature, load and wear resistance of polymer materials. General polymer self-lubricating materials (nylon, polytetrafluoroethylene, etc.) no longer meet the requirements for use. Polyether ether ketone (PEEK) is a new type of aromatic plastic special engineering plastics, with excellent comprehensive properties such as high heat resistance (melting point 344 ° C), high strength, high modulus, high toughness, etc., and its excellent hydrolysis resistance The resistance is unmatched by polyimide (PI), and it can withstand the test of water vapor for a long time without significant change in performance. However, pure PEEK has the defects of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M157/02C10M145/24C10M177/00C08G65/40
Inventor 汪怀远朱艳吉
Owner DAQING GASOLINEEUM INST
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