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Self-lubrication composite material of polyimide

A technology of polyimide and composite materials, which is applied in the field of polyimide self-lubricating composite materials, can solve the problem of insufficient improvement of polyimide tribological properties, long time to reach steady state, low friction reduction and wear resistance, etc. problems, to achieve the effect of improving tribological properties, low wear rate, and improving anti-friction and wear-resisting ability

Inactive Publication Date: 2013-05-29
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main problems of the current polymer self-lubricating composite materials are low friction and wear resistance, short service life, long time to reach steady state and insufficient strength.
Most of these materials use fiber-modified polyimide, which has insufficient effect on improving the tribological properties of polyimide and takes a long time to reach a steady state.

Method used

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  • Self-lubrication composite material of polyimide
  • Self-lubrication composite material of polyimide

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Using wet mixing method, adding nano-silicon nitride to industrial alcohol, ultrasonically stirring, then adding polyimide, graphite and carbon fiber in sequence, fully mixing, and then drying by suction filtration; the composition and quality of the raw materials The fraction is polyimide 55%, carbon fiber 20%, graphite 20%, nano silicon nitride 5%. Pour the mixed molding material into the mold and hot press molding, the molding temperature is 360°C, the pressure is 38MPa, heat preservation and pressure holding for 40 minutes, and natural cooling.

Embodiment 2

[0030] Using wet mixing method, adding nano-silicon nitride to industrial alcohol, ultrasonically stirring, then adding polyimide, graphite and carbon fiber in sequence, fully mixing, and then drying by suction filtration; the composition and quality of the raw materials The fraction is polyimide 70%, carbon fiber 10%, graphite 14%, nano silicon nitride 6%. Pour the mixed molding material into the mold and hot press molding, the molding temperature is 380°C, the pressure is 36MPa, heat preservation and pressure holding for 50 minutes, and natural cooling.

Embodiment 3

[0032] Using wet mixing method, adding nano-silicon nitride to industrial alcohol, ultrasonically stirring, then adding polyimide, graphite and carbon fiber in sequence, fully mixing, and then drying by suction filtration; the composition and quality of the raw materials The fraction is polyimide 60%, carbon fiber 17%, graphite 20%, nano silicon nitride 3%. Pour the mixed molding material into the mold and hot press molding, the molding temperature is 370°C, the pressure is 40MPa, heat preservation and pressure holding for 40 minutes, and natural cooling.

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Abstract

The invention discloses a self-lubrication composite material of polyimide, which is composited and padded with carbon fibers, a solid lubricant and nanometer particles. The self-lubrication composite material has the characteristics of high mechanical strength, small friction coefficient, low wear rate and the like. The self-lubrication composite material can be processed into slip sheets, bearings and the like, the anti-friction and wear resisting capabilities of the material are improved, and the service life of the material is prolonged.

Description

technical field [0001] The invention relates to a polyimide self-lubricating composite material, in particular to a polyimide self-lubricating composite material filled with carbon fibers, solid lubricants and nanoparticles. Background technique [0002] Polyimide is a kind of polymer material developed in the 1950s. Its main chain contains imide rings. It is resistant to high temperature, radiation, and has excellent mechanical properties. It is known as the "King of Plastics". Has been widely used in aviation, aerospace, microelectronics, laser and other fields. In recent years, countries have listed the research, development and utilization of polyimide as one of the most promising engineering plastics in the 21st century. ". [0003] The tribological properties of pure polyimide materials are poor, and some properties cannot meet the requirements of use under harsh conditions, so it must be modified. Fiber filling is a widely used method to improve the friction and we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K7/06C08K3/04C08K3/34
Inventor 张新瑞王齐华王廷梅裴先强
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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