Hydro-oleophobic carbon nanotube-polytetrafluoroethylene valve sealing ring

Abstract

The invention discloses a hydro-oleophobic carbon nanotube-polytetrafluoroethylene valve sealing ring, which contains the following raw materials (by weight): 100 parts of polytetrafluoroethylene, 5-8 parts of carbon nanotube, 60-80 parts of tetrahydrofuran, 2-3 parts of 1,1-diphenylethylene, 0.1-0.3 part of sec-butyllithium, 2-3 parts of hexane, 2-3 parts of methacrylic acid(3-(triisopropoxy silicon))propylene ester, 2-3 parts of methacrylic acid(heptadecafluorooctyl)ethylene ester, 40-50 parts of benzotrifluoride, 8-10 parts of concentrated hydrochloric acid, 20-25 parts of 60-70% sodium hypochlorite, 20-25 parts of EDTA, 40-50 parts of ammonia water, 80-100 parts of anhydrous ethanol, 80-100 parts of anhydrous methanol, 3-5 parts of barium sulfate, 1-2 parts of molybdenum disulfide, 1-3 parts of a silane coupling agent kh550 and 9-10 parts of ammonium chloride, etc. The prepared sealing ring is super-hydrophobic-oleophobic and wear-resistant and has long service life.

Description

technical field [0001] The invention belongs to the field of valve sealing rings, and in particular relates to an amphiphobic 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 modification and ...

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.