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Polyphenyl thioether sweating type lubricating friction-resistant composite material and preparation method thereof

A technology of polyphenylene sulfide and composite materials, which is applied in the field of polyphenylene sulfide composite materials and its preparation, can solve the problems of unsatisfactory tribological applications, low material strength, and single pore structure, and meet the requirements of long life and durability Improved abrasiveness and good oil transport effect

Active Publication Date: 2013-12-11
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the provided pore-forming method is simple, the porosity is large, the pore structure is single, and the material strength is low, which cannot meet the tribological application under harsh conditions such as high load and speed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 55.2g of polyphenylene sulfide powder, 24g of sodium chloride, and 0.8g of beta zeolite molecular sieve were selected. The mixture was mixed and dried by dry method. After mixing evenly, put it into a mold, cold press at 50MPa, and keep warm at 310°C for 2 hours. The pores were cleaned with ethanol, and the porosity of the obtained skeleton was 22.0%. Under 0.1 bar, high-temperature vacuum impregnation with lithium-based grease was used for 2 hours to obtain a PPS sweat-type lubricating and wear-resistant composite material with a grease content of 22.0%. The friction and wear performance of the material was tested on the MPX-2000 friction and wear testing machine, 150N, 1.4m / s, and the test time was 2 hours.

Embodiment 2

[0026] Select 40g of polyphenylene sulfide powder, 24g of sodium chloride, 8g of polytetrafluoroethylene, and 8g of mesoporous titanium oxide whiskers. The mixture was mixed and dried by dry method. The mixed mixed powder is packed into a mould, and cold-pressed at a pressure of 20 MPa. Sintering process is the same as example 1. Wash the channels ultrasonically with distilled water. The microporosity of the obtained framework was 31.0%. At 150°C and 0.2 bar, high-temperature vacuum impregnation with lithium-based grease was used for 4 hours to obtain a polyphenylene sulfide sweat-type lubricating and wear-resistant composite material with a fat content of 31.0%. 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 3

[0034] 41.4g of polyphenylene sulfide powder, 24g of sodium chloride, 12g of polytetrafluoroethylene powder, and 2.4g of carbon nanotubes were selected, mixed and dried by a dry method. Put the mixed powder into a mold, cold press molding at a pressure of 70MPa, and keep warm at 330°C for 6 hours. The pores were cleaned with ethanol, and the porosity of the obtained skeleton was 25.0%, and the lithium-based grease was vacuum-impregnated at 0.06 bar for 4 hours to obtain a polyphenylene sulfide sweat-type lubricating and wear-resistant composite material. The friction and wear performance of the material was tested on the MPX-2000 friction and wear testing machine, 200N, 1.4m / s, the test time was 2 hours, the friction coefficient was 0.025, and the wear volume was 5.83×10 -16 m 3 / (N·m).

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Abstract

The invention relates to a polyphenyl thioether sweating type lubricating friction-resistant composite material and a preparation method thereof, and is used for solving the problem that the traditional polyphenyl thioether composite material is difficult to satisfy the technical requirements of high load, low friction and high friction resistance. The composite material is prepared by the steps of: adding a pore-forming agent to polyphenyl thioether to form a frame base material, then carrying out sintering and shaping processes to obtain a frame with porosity of 5-45%, and finally filling lubricating oil or grease to the holes in the frame, wherein the pore-forming agent for forming the frame base material comprises a micro pore-forming agent and a nano pore-forming agent, and the nano pore-forming agent comprises one or more of mesoporous TiO2 whiskers, molecular sieves and carbon nanotubes. A communicated three-dimensional spatial network structure is constructed inside the composite material, so that the lubricating grease forms stable and continuous oil-film lubrication on a friction surface through the communicated composite holes under the actions of load and temperature in a friction process, thus the purposes of low friction and high friction resistance are achieved.

Description

technical field [0001] The invention relates to a polyphenylene sulfide composite material and a preparation method thereof. Background technique [0002] With the rapid development of modern science and technology, aerospace, machinery manufacturing, transportation and other industrial sectors have put forward more and more stringent requirements on the wear resistance and high temperature resistance of high-performance plastics. Polyphenylene sulfide (PPS) is a crystalline thermoplastic special engineering plastic with excellent high temperature stability (melting point 280°C), chemical corrosion resistance, flame retardancy and good mechanical properties. However, traditional PPS and its composite materials are not suitable as friction parts, because PPS has the defect of high friction coefficient. The high friction coefficient leads to rapid heat generation during the friction process, difficult heat conduction, serious heat accumulation, and the temperature even exceed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/02C08L27/18C08L71/08C08L1/26C08K13/04C08K7/08C08K3/16C08K3/34C08K3/22C08K3/04C08K3/26C08K5/21C08K5/01
Inventor 朱艳吉汪桂英汪怀远张帅
Owner NORTHEAST GASOLINEEUM UNIV