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Porous-grade polyether-ether-ketone self-lubricating wear-resistant composite material and preparation method thereof

A composite material, polyether ether ketone technology, applied in the field of preparation of the material, can solve the problems of affecting oil injection effect, low porosity, and high wear rate of composite materials, achieve stable and good lubrication, improve service life, and reduce friction. Effect

Inactive Publication Date: 2012-06-20
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they only use a single-scale pore-forming agent, and the pore-forming method is simple, resulting in a single pore structure. When the pore-forming agent content is low, there will be disconnected closed pores inside the composite material, and the porosity is low, which affects the oil injection effect. , the fat content of the obtained oil-containing composite material is low, and it will also affect the oil transportation; when the content of the pore-forming agent is high, a large number of micron-sized pores are connected, resulting in serious oil leakage and oil rejection, and it is difficult to ensure long-term oil supply. The wear rate of composite materials is relatively high, which cannot meet the application of anti-friction and wear resistance under high load and high speed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 50g of polyetheretherketone powder, 30g of NaCl, 15g of polytetrafluoroethylene, and 5g of mesoporous titanium oxide whiskers were selected as the base material, and then dried for 3 hours. The dry mixed powder is packed into a mould, and the pressure is 10MPa for hot pressing. Incubate at 370°C for 2 hours. Wash the channels ultrasonically with distilled water. Vacuum impregnation with general-purpose lithium-based grease at 150°C and 0.1 bar for 12 hours to obtain a polyether ether ketone composite material with a fat content of 27.2%. The friction and wear performance of the material was tested on the MPX-2000 friction and wear testing machine, the test conditions were 200N, 1.4m / s, and the test time was 2 hours.

Embodiment 2

[0038] 65g of polyetheretherketone powder, 30g of polyethylene glycol (purity 99.5%), and 5g of zeolite beta were selected as the base material, mixed and dried for 3 hours. 100MPa cold press molding, sintering at 370°C for 6 hours to cool down naturally. Wash the channels with ethanol and distilled water. Vacuum impregnation with general-purpose lithium-based grease at 150°C and 0.07 bar to obtain a polyether ether ketone composite material with a fat content of 18.2%. The test condition is 150N, 1.4m / s, and the friction and wear performance is tested for 2 hours.

Embodiment 3

[0044] 65g of polyether ether ketone powder, 30g of citric acid (purity 99.5%), 5g of carbon nanotubes were selected as the base material and mixed mechanically, and dried for 3 hours. 120MPa cold press molding, sintering process with embodiment 2. The pores were cleaned with ethanol, and the porosity of the obtained material was 19.3%. Dimethicone was die-cast for 10 hours to obtain a polyether ether ketone self-lubricating composite material with an oil content of 19.3%. 100N, 1.4m / s, test time 2 hours. Friction coefficient: 0.0351, wear rate: 5.7×10 -16 m 3 / ( N m).

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Abstract

The invention relates to a porous-grade polyether-ether-ketone self-lubricating wear-resistant composite material and a preparation method thereof, which are used for solving the problems of simple pore forming way and over single pore canal structure existing in a polyether-ether-ketone porous material. The method comprises the following steps of: adding micron and nano-pore forming agents into polyether-ether-ketone, sintering and molding to obtain a substrate; and filling lubricating oil or grease into holes inside the substrate, wherein the nano-pore forming agent is one or a mixture of certain of mesoporous titanium oxide crystal whiskers of which the specific surface area is more than or equal to 50 m<2> / g, a molecular sieve or a carbon nanotube. In the composite material, a stable lubricating oil film is formed on a friction surface in a friction process, so that stable and good lubricating functions are realized; the composite material is suitable to be applied in special environments such as high temperatures, vacuum, corrosion, radiation and the like; and friction can be reduced remarkably, and the service life of a device is prolonged greatly.

Description

technical field [0001] The invention relates to a novel polyether ether ketone composite material, and also relates to a preparation method of the material. Background technique [0002] With the aerospace, electronics, machinery manufacturing, transportation and other industrial sectors, more and more stringent requirements are put forward for the wear resistance and temperature resistance of high-performance plastics. Polyetheretherketone (PEEK) is a new type of semi-crystalline aromatic plastic special engineering plastics with excellent comprehensive properties such as high heat resistance, high strength, high modulus, high toughness and high mechanical strength. However, pure PEEK has the defects of high friction coefficient and low heat distortion temperature. The high friction coefficient leads to rapid heat generation during friction, difficult heat conduction, and serious heat accumulation. In order to reduce the friction coefficient of the material and solve the p...

Claims

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Application Information

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IPC IPC(8): C08L61/16C08J9/40C08J9/26C08J9/28C08K7/08C08K7/26C08K7/00C08K3/04B29B13/06B29C51/10B29C51/46B29C67/04B29B15/08B29B15/10
Inventor 汪怀远张帅朱艳吉汪桂英林珊
Owner NORTHEAST GASOLINEEUM UNIV
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