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High-performance oxidized carbon fiber/graphite/polyimide modified polytetrafluoroethylene polymer composite material and preparation method thereof

A polytetrafluoroethylene and polyimide technology, applied in the field of polytetrafluoroethylene modification, can solve problems such as limiting the application field and application scope of polytetrafluoroethylene, ignoring changes in comprehensive mechanics, and failing to meet market demands. , to achieve the effect of excellent self-lubricating performance, convenient operation and obvious modification effect

Inactive Publication Date: 2020-11-10
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the field of aerospace, the key bearings of aircraft have poor wear resistance and friction reduction performance, which will greatly limit the improvement of performance
[0003] PTFE is a self-lubricating engineering plastic with excellent performance. It has good high and low temperature stability, low friction coefficient and good corrosion resistance. It is widely used in the production of sliding parts, such as sliding bearings, gears, However, its wear resistance is poor, the wear rate is high, and the wear failure is particularly serious during use, which cannot meet the needs of the market and limits the application field and scope of PTFE. Therefore, it is urgent to modify it.
[0004] At present, researchers at home and abroad have developed a complete single filler to improve the wear resistance of PTFE, but they have neglected to consider the changes in its comprehensive mechanics.

Method used

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  • High-performance oxidized carbon fiber/graphite/polyimide modified polytetrafluoroethylene polymer composite material and preparation method thereof
  • High-performance oxidized carbon fiber/graphite/polyimide modified polytetrafluoroethylene polymer composite material and preparation method thereof
  • High-performance oxidized carbon fiber/graphite/polyimide modified polytetrafluoroethylene polymer composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A carbon oxide fiber / graphite / polyimide / polytetrafluoroethylene composite material is composed of the following raw materials in terms of mass percentage: 3% carbon oxide fiber, 5% graphite, 5% polyimide, and 87 polytetrafluoroethylene %.

[0037] The preparation method of this embodiment is as follows:

[0038] (1) Preparation and drying of carbon oxide fibers: treat carbon fibers with a diameter of 1 μm and an aspect ratio of 20:1 in a muffle furnace at 400°C for 60 minutes, remove the sizing agent, and cool to room temperature for later use; add the carbon fibers after high temperature treatment Concentration is 20wt% nitric acid, the mass ratio of carbon fiber and nitric acid solution is 1:3, and the solution is stirred at 50°C for 3 hours using a water bath heating and stirring device; Dry at 100°C for 3 hours to obtain oxidized carbon fibers for use.

[0039] (2) Graphite and polyimide are respectively placed in a blast drying oven for drying treatment. During t...

Embodiment 2

[0044] A carbon oxide fiber / graphite / polyimide / polytetrafluoroethylene composite material is composed of the following raw materials in terms of mass percentage: 3% carbon oxide fiber, 5% graphite, 8% polyimide, and 84% polytetrafluoroethylene %.

[0045] The preparation method of this embodiment is as follows:

[0046] (1) Preparation and drying of carbon oxide fibers: treat carbon fibers with a diameter of 1 μm and an aspect ratio of 20:1 in a muffle furnace at 400°C for 60 minutes, remove the sizing agent, and cool to room temperature for later use; add the carbon fibers after high temperature treatment Concentration is 40wt% nitric acid, the mass ratio of carbon fiber and nitric acid solution is 1:3, and the solution is stirred at 60°C for 3 hours using a water bath heating and stirring device; Dry at 100°C for 3 hours to obtain oxidized carbon fibers for use.

[0047] (2) Graphite and polyimide are respectively placed in a blast drying oven for drying treatment. During ...

Embodiment 3

[0052] A carbon oxide fiber / graphite / polyimide / polytetrafluoroethylene composite material is composed of the following raw materials in terms of mass percentage: 3% carbon oxide fiber, 5% graphite, 10% polyimide, and 82% polytetrafluoroethylene %.

[0053] The preparation method of this embodiment is as follows:

[0054] (1) Preparation and drying of carbon oxide fibers: treat carbon fibers with a diameter of 1 μm and an aspect ratio of 20:1 in a muffle furnace at 400°C for 60 minutes, remove the sizing agent, and cool to room temperature for later use; add the carbon fibers after high temperature treatment Concentration is 30wt% nitric acid, the mass ratio of carbon fiber and nitric acid solution is 1:3, and the solution is stirred at 60°C for 3 hours using a water bath heating and stirring device; Dry at 100°C for 3 hours to obtain oxidized carbon fibers for use.

[0055] (2) Graphite and polyimide are respectively placed in a blast drying oven for drying treatment. During...

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Abstract

The invention belongs to the technical field of polytetrafluoroethylene modification, and particularly relates to a high-performance oxidized carbon fiber / graphite / polyimide modified polytetrafluoroethylene polymer composite material and a preparation method thereof. The composite material provided by the invention comprises the following raw materials in percentage by mass: 3-5% of an oxidized carbon fiber; 3%-5% of graphite powder; 3%-10% of polyimide; polytetrafluoroethylene as balance. The preparation method comprises the following steps: (1) preparing oxidized carbon fibers, and performing drying; (2) respectively drying graphite and polyimide; (3) sequentially adding polytetrafluoroethylene, oxidized carbon fiber, graphite and polyimide into a mixer for mixing, and performing sievingto obtain composite material powder; (4) adding the composite material powder into a mold cavity, carrying out cold compression molding, and performing sintering. The composite material disclosed bythe invention is low in friction coefficient, small in abrasion loss, high in thermal stability, high in mechanical strength and long in service life; meanwhile, the invention provides a preparation method of the material, and the preparation cost is low.

Description

technical field [0001] The invention belongs to the technical field of polytetrafluoroethylene modification, and in particular relates to a high-performance carbon oxide fiber / graphite / polyimide modified polytetrafluoroethylene polymer composite material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the machinery industry, chemical industry, aerospace and other industries, the phenomenon of mechanical equipment damage due to component wear has become more and more frequent. Usually, the most common fault is the friction and wear of the kinematic pair. In addition, in the field of aerospace, the key bearings of aircraft have poor wear resistance and friction reduction performance, which will greatly limit the improvement of performance. [0003] PTFE is a self-lubricating engineering plastic with excellent performance. It has good high and low temperature stability, low friction coefficient and good corrosion re...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08L79/08C08K9/02C08K7/06C08K3/04C08J3/20
CPCC08J3/203C08J2327/18C08J2479/08C08K2201/003C08K2201/005C08L27/18C08L79/08C08K9/02C08K7/06C08K3/04
Inventor 周熠智陈越孟烨桥付师庆
Owner SHANDONG DONGYUE POLYMER MATERIAL