Carbon nanotube-polytetrafluoroethylene valve sealing ring with high elasticity

Abstract

The invention discloses a carbon nanotube-polytetrafluoroethylene valve sealing ring with high elasticity. The valve sealing ring is prepared from the following components by weight: 100 parts of polytetrafluoroethylene, 70 to 80 parts of a sodium-naphthalene solution, 5 to 8 parts of carbon nanotubes, 8 to 10 parts of phenol, 8 to 10 parts of p-toluylic acid, 1 to 2 parts of bentonite, 5 to 8 parts of diphenyl ether, 1 to 3 parts of butyl titanate, 20 to 25 parts of sodium hypochlorite with a concentration of 60 to 70%, 20 to 25 parts of EDTA, 40 to 50 parts of ammonia water, 80 to 100 parts of absolute ethyl alcohol, 3 to 5 parts of barium sulfate, 1 to 2 parts of molybdenum disulfide, 1 to 3 parts of a silane coupling agent KH550, 9 to 10 parts of ammonium chloride, 30 to 35 parts of urea and 30 to 35 parts of water. The carbon nanotube-polytetrafluoroethylene valve sealing ring disclosed in the invention has good wear resistance, good elasticity and long service life.

Description

technical field [0001] The invention belongs to the field of valve sealing rings, and in particular relates to a highly elastic carbon nanotube-polytetrafluoroethylene valve sealing ring and its preparation method and application. Background technique [0002] Polytetrafluoroethylene (PTFE) is characterized by its high chemical stability, strong high and low temperature resistance, outstanding non-stickiness, good lubricity, excellent electrical insulation, aging resistance, minimal water absorption, etc. , making it widely used in aerospace, petrochemical, mechanical industry, electronic appliances, food industry, textile and other fields. However, due to its poor mechanical properties, large linear expansion coefficient, poor creep resistance, poor wear resistance, low hardness, and difficulties in forming and secondary processing, its application range is limited to a certain extent. In order to improve and overcome the defects of pure PTFE, surface modification, filling...

AI Technical Summary

Problems solved by technology

[0002] Polytetrafluoroethylene (PTFE) is characterized by its high chemical stability, strong high and low temperature resistance, outstanding non-stickiness, good lubricity, excellent electrical insulation, aging resistance, minimal water absorption, etc. , making it widely used in aerospace, petrochemical, mechanical industry, electronic appliances, food industry, textile and other fields. However, due to its poor mechanical properties, large linear expansion coefficient, poor creep resistance, poor wear resistance, low hardness, and difficulties in forming and secondary processing, its application range is limited to a certain extent.