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Hydro-oleophobic carbon nanotube-polytetrafluoroethylene valve sealing ring

A technology of polytetrafluoroethylene and valve sealing, applied in the field of valve sealing rings, can solve the problems of difficult molding and secondary processing, large linear expansion coefficient, small water absorption, etc., and achieve good extrusion deformation resistance and excellent wear resistance Performance, good installation resilience effect

Inactive Publication Date: 2016-11-09
ANHUI RONGDA VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] An amphiphobic carbon nano-polytetrafluoroethylene valve sealing ring is prepared from the following components by weight: 100 parts of polytetrafluoroethylene, 5 parts of carbon nanotubes, 70 parts of tetrahydrofuran, 1,1-di 2 parts of phenylethylene, 0.2 parts of sec-butyllithium, 2 parts of hexane, 2 parts of (3-(triisopropoxysilyl)) propylene methacrylate, methacrylic acid (heptadecafluorooctyl) 2 parts of ethylene ester, 45 parts of trifluorotoluene, 8 parts of concentrated hydrochloric acid, 20 parts of 60-70% sodium hypochlorite, 20 parts of EDTA, 40 parts of ammonia water, 80 parts of absolute ethanol, 80 parts of absolute methanol, 3 parts of barium sulfate , 1 part of molybdenum disulfide, 3 parts of silane coupling agent kh550, 10 parts of ammonium chloride, 30 parts of urea, and 60 parts of water.

[0022] An amphiphobic carbon nano-polytetrafluoroethylene valve sealing ring is characterized in that its preparation method comprises the steps:

[0023] (1) A...

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PUM

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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 ...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08L33/14C08K13/06C08K9/02C08K9/04C08K7/24C08K3/30C08K5/544C08F297/02
CPCC08F297/026C08L27/18C08L33/14C08K13/06C08K9/02C08K9/04C08K7/24C08K2003/3009C08K2003/3045C08K5/544
Inventor 胡光荣
Owner ANHUI RONGDA VALVE
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