Sealing strip PTFE resin composite material with high temperature resistance in high-temperature region and preparation method thereof

A technology of resin composite materials and high temperature zone, applied in the field of composite materials, can solve the problems of small friction coefficient thermal stability, poor dimensional stability, low dielectric strength, etc., to improve heat resistance, reduce thermal expansion coefficient, and reduce leakage hidden effect

Inactive Publication Date: 2017-12-15
NANJING COMPTECH COMPOSITES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polytetrafluoroethylene (PTFE) is a polymer material with excellent comprehensive properties. It has excellent high and low temperature resistance and chemical corrosion resistance, and has excellent dielectric properties, ex

Method used

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  • Sealing strip PTFE resin composite material with high temperature resistance in high-temperature region and preparation method thereof
  • Sealing strip PTFE resin composite material with high temperature resistance in high-temperature region and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1-3

[0021] The preparation method of the high-temperature-resistant high-temperature zone sealing strip for the air scroll compressor comprises the steps of:

[0022] (1) Add vinylbenzyl dimethyl octadecyl ammonium chloride to ethanol to make ethanol solution, add sodium montmorillonite to ethanol, stir to make 5% montmorillonite ethanol suspension Liquid, mix the two solutions, control the mass ratio of ethylene benzyl dimethyl octadecyl ammonium chloride and sodium montmorillonite to 0.2-0.6:1, stir for more than 24 hours, let stand, obtain precipitation, grind after washing into fine powder below 300 mesh;

[0023] (2) Add the carbon fiber into the acid solution to heat up and stir, then suction filter to obtain the acidified carbon fiber;

[0024] (3) Add the product obtained in step (1) (2), copper powder and polytetrafluoroethylene powder into the organic solvent and stir until they are evenly mixed;

[0025] (4) The mixed solution obtained in step (3) is injected into a s...

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Abstract

The invention discloses a sealing strip PTFE resin composite material with high temperature resistance in a high-temperature region. The sealing strip PTFE resin composite material contains the following components by weight percent: 9-14% of carbon fiber, 6-15% of copper powder, 3-10% of modified imvite and the balance of PTFE, wherein the modified imvite is the Na-montmorillonite modified with ethylene benzyl dimethyl octadecyl ammonium chloride. The invention also discloses a preparation method thereof. According to the invention, the carbon fiber is added, so that the coefficient of thermal expansion can be reduced and the leakage hidden danger caused by expansion after temperature rise can be reduced; creep can be reduced, the hardness can be increased and the heat resistance of the material can be increased; the addition of the copper powder is beneficial to the reduction of the abrasion of the material, the reduction of creep, the reduction of deformation under load and the promotion of the thermal stability and conductivity of a thermal PTFE composite material; the modified imvite is capable of forming uniform nanoscale dispersing in PTFE, so that the composite material has higher heat-resisting stability; the sealing strip with high temperature resistance in the high-temperature region can be used for a long term under the environment of 300 DEG C without deformation.

Description

technical field [0001] The invention relates to a PTFE resin composite material for a high-temperature-resistant high-temperature zone sealing strip for an air scroll compressor on a new energy vehicle and a preparation method thereof, and belongs to the field of composite materials. Background technique [0002] Polytetrafluoroethylene (PTFE) is a polymer material with excellent comprehensive properties. It has excellent high and low temperature resistance and chemical corrosion resistance, and has excellent dielectric properties, extremely small friction coefficient and good thermal stability. It can be used in- Long-term use at 260°C~260°C, but pure PTFE has disadvantages such as cold flow, poor dimensional stability, low dielectric strength, and large wear. [0003] New energy vehicles generally use air scroll compressors to provide compressed air for the vehicle's braking system, door opening and closing structure, etc. The air scroll compressor is a compressor that co...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08K9/04C08K3/34C08K3/08C08K7/06C08K9/02C09K5/14
CPCC08K9/04C08K3/08C08K3/346C08K7/06C08K9/02C08K2003/085C08K2201/001C08L2201/08C09K5/14C08L27/18
Inventor 杨文光杨烨靳予孙佳青孙克原陈佩民陈朝曦焦小东陈银
Owner NANJING COMPTECH COMPOSITES CORP
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