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Self-lubricating low temperature zone sealing strip PTFE resin composite material and preparation method thereof

A technology of resin composite material and low temperature zone, which is applied in the field of composite materials, can solve the problems of inability to cool multiple cavities and high air insulation index, and achieve the effects of excellent thermal stability, high hardness, good self-lubricating performance and mechanical properties

Inactive Publication Date: 2018-02-02
NANJING COMPTECH COMPOSITES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are multiple working chambers in the air scroll compressor, and it is impossible to implement external cooling for multiple chambers, and the adiabatic index of the air is high, so the sealing strip in the low temperature area needs to work under the condition of a large temperature difference, and it needs to be used in high temperature and low temperature environments. Both have good self-lubricating properties

Method used

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  • Self-lubricating low temperature zone sealing strip PTFE resin composite material and preparation method thereof
  • Self-lubricating low temperature zone sealing strip PTFE resin composite material and preparation method thereof

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Embodiment 1-4

[0022] The preparation method of the self-lubricating low-temperature region sealing strip for the air scroll compressor comprises the steps of:

[0023] (1) Put the graphite into the fluorination device, vacuumize, feed the fluorine source, and react at 400-700°C and 100-500 kPa for 6-24 hours to obtain fluorinated graphite;

[0024] (2) Add POB powder, molybdenum disulfide, nano-calcium fluoride, graphite fluoride, silane coupling agent and polytetrafluoroethylene powder into the organic solvent, and fully stir through a high-shear dispersing emulsifier to make it evenly mixed , dry at 120°C for 2~6h to remove water and solvent;

[0025] (3) Molding after cooling, holding pressure for 2min, holding pressure 15-30MPa, sintering temperature 360-400°C, sintering for 3~6h, naturally cooling to room temperature with the furnace, mechanical processing after demolding to obtain an air scroll compressor Use self-lubricating low temperature zone seals. The content of each component...

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Abstract

The invention discloses a self-lubricating low temperature zone sealing strip PTFE resin composite material. The composite material comprises, by mass, 15-20% of POB, 5-10% of molybdenum disulfide, 2-4% of nanometer calcium fluoride, 2-4% of graphite fluoride, 1-2% of a silane coupling agent, and the balance of PTFE. The invention also discloses a preparation method of the composite material. ThePOB (poly-p-oxybenzoyl) is an insoluble and infusible aromatic high crystallinity polymer, has a decomposition temperature reaching 530 DEG C, can be used at 300 DEG C for a long term, and has the advantages of high hardness, excellent heat stability, excellent ageing corrosion resistance, excellent compressive creep resistance, and good complementation with PTFE in performances. The molybdenum disulfide, calcium fluoride, graphite fluoride and POB crystals have similar lamellar structures, are excellent lubricating fillers, and cooperate with each other to make a self-lubricating low temperature zone sealing strip have good self-lubricating performance and good mechanical performance in a high temperature zone and a high temperature zone.

Description

technical field [0001] The invention relates to a PTFE resin composite material for a self-lubricating low-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. In order to overcome the defects of pure PTFE, surface modification, filling modification or blending modification are usually used to improve its comprehensive performance. Among them, filling modification is widely used because ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L67/00C08K13/02C08K3/30C08K3/16C08K3/04C08K5/54
CPCC08L27/18C08K2003/162C08K2003/3009C08L67/00C08K13/02C08K3/30C08K3/16C08K3/04C08K5/54
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徐小曼杨勇
Owner NANJING COMPTECH COMPOSITES CORP
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