High-thermal-conductivity PTFE (polytetrafluoroethylene) resin composite for sealing strip in high-temperature region and preparation method of PTFE resin composite

Abstract

The invention discloses a high-thermal-conductivity PTFE (polytetrafluoroethylene) resin composite for a sealing strip in a high-temperature region. The PTFE resin composite is prepared from components in percentage by mass as follows: 9%-14% of carbon fibers, 4%-8% of copper powder, 3%-5% of carbon nano tubes, 2%-4% of magnesium oxide, 2%-4% of boron nitride, 1%-2% of a coupling agent and the balance of PTFE. The invention further discloses a preparation method of the PTFE resin composite. By addition of the carbon fiber, tensile modulus, compression modulus and bending modulus of the material can be improved, a coefficient of thermal expansion is reduced, the thermal conductivity is increased, and friction heat is conducted out quickly; by addition of the copper powder and the carbon nano tubes, wear of the material can be reduced, creep is reduced, electrical conductivity is improved, accumulation of static charges produced by friction can be prevented, and the thermal conductivity of the material can be improved well by the carbon nano tubes; under the cooperation of magnesium oxide and boron nitride, the thermal conductivity and the wear resistance of the material can be enhanced effectively; the high-thermal-conductivity PTFE resin composite prepared from the materials and used for the sealing strip in the high-temperature region has high thermal conductivity and electrical conductivity.

Description

technical field [0001] The invention relates to a PTFE resin composite material with high thermal conductivity and high temperature zone sealing strip for an air scroll compressor on a new energy vehicle and a preparation method thereof, belonging 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...

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, 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.

Images