Carbon-fiber-reinforced polytetrafluoroethylene composite material for valve sealing and preparation method of carbon-fiber-reinforced polytetrafluoroethylene composite material for valve sealing

Abstract

The invention discloses a carbon-fiber-reinforced polytetrafluoroethylene composite material for valve sealing and a preparation method of the carbon-fiber-reinforced polytetrafluoroethylene composite material for valve sealing. The carbon-fiber-reinforced polytetrafluoroethylene composite material for valve sealing is characterized by being prepared from, by weight, 2-3 parts of carbon fibers, 5-10 parts of carbon nano tubes, 10-15 parts of ethyl alcohol, 25-35 parts of polytetrafluoroethylene emulsion, an appropriate amount of acetic acid, 15-25 parts of hydrofluoric acid, 15-25 parts of nitric acid, 1-2 parts of lanthanum chloride, 4-6 parts of silane coupling agent KH550, 2-3 parts of edetic acid, 1-2 parts of Fe(NO3)3, 1-2 parts of Co(NO3)3, an appropriate amount of ammonium hydroxide, an appropriate amount of nickel foam, 3-5 parts of diamond, 5-7 parts of dodecyltrimethylammonium bromide, an appropriate amount of methane, an appropriate amount of argon, an appropriate amount of nitrogen and100-150 parts of distilled water. The carbon-fiber-reinforced polytetrafluoroethylene composite material for valve sealing has the advantages that the nickel foam in a three-dimensional form serves as polymer filler, so that mechanical performance of the composite material is improved, and the added carbon nano tubes can be distributed more evenly; through treatment of the carbon fibers, surface wettability is improved and the interface adhesion quality of the composite material is improved.

Description

technical field [0001] The invention relates to a polytetrafluoroethylene composite material, in particular to a carbon fiber reinforced polytetrafluoroethylene composite material for valve sealing and a preparation method thereof. Background technique [0002] PTFE material has excellent corrosion resistance, weather resistance, chemical stability, and non-stick, non-toxic, non-polluting, known as the king of plastics, is a good sealing material, widely used in national defense, It is used in sealing devices in many fields such as aerospace, medicine, petrochemical, electronics, machinery, etc. At the same time, PTFE material also has excellent radiation resistance, tritium compatibility and low permeability to tritium, so it is also Widely used in the sealing of tritium-containing systems. Using carbon nanotubes as polymer fillers can improve the physical, mechanical and tribological properties of materials. Generally speaking, fillers with a larger aspect ratio are more...

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Problems solved by technology

[0003] In Ren Jie's master's degree thesis "Study on Foam Nickel / PTFE Mechanical Sealing Surface Composite Material and Tribological Behavior", a sealing composite material was prepared, but as a valve sealing material, it still has the ability to resist pressure and resist pressure. The problem of poor creep ability