▎ 摘　　要

NOVELTY - A carbon nanotube/PTFE composite material comprises 5-10 pts. wt. carbon nanotube, 80-90 pts. wt. PTFE, 10-15 pts. wt. carbon fiber, 15-20 pts. wt. acetone, 5-10 pts. wt. steel fiber, 20-25 pts. wt. fluororubber powder, 1-2 pts. wt. glass fiber, 1-3 pts. wt. graphene oxide, 5-10 pts. wt. silicon dioxide, 15-20 pts. wt. KH550 (RTM: ( gamma )-aminopropyltriethoxysilane) silane coupling agent, 30-40 pts. wt. ethanol having concentration of 95%, acetic acid, 5-10 pts. wt. polyisocyanate JQ-1, dimethylformamide, 4-dimethyl aminopyridine, dicyclohexyl carbodiimide and water. USE - Carbon nanotube/PTFE composite material (claimed). ADVANTAGE - The surface sintering state of the PTFE is improved, so that bonding strength of the composite material is effectively improved. The carbon nanotube/PTFE composite material has high-temperature resistant, anti-oxidation property, high corrosion resistance, and low friction coefficient. DETAILED DESCRIPTION - A carbon nanotube/PTFE composite material comprises 5-10 pts. wt. carbon nanotube, 80-90 pts. wt. PTFE, 10-15 pts. wt. carbon fiber, 15-20 pts. wt. acetone, 5-10 pts. wt. steel fiber, 20-25 pts. wt. fluororubber powder, 1-2 pts. wt. glass fiber, 1-3 pts. wt. graphene oxide, 5-10 pts. wt. silicon dioxide, 15-20 pts. wt. KH550 (RTM: ( gamma )-aminopropyltriethoxysilane) silane coupling agent, 30-40 pts. wt. ethanol having concentration of 95%, acetic acid, 5-10 pts. wt. polyisocyanate JQ-1, 15-20 pts. wt. dimethylformamide, 10-15 pts. wt. 4-dimethylaminopyridine, 15-20 pts. wt. dicyclohexylcarbodiimide and 90-100 pts. wt. water. The carbon fiber has a median length of 75-150 mu m. The steel fiber has a median length of 50-150 mu m. The particle size of fluororubber powder is 80-200 mesh. An INDEPENDENT CLAIM is included for method for producing carbon nanotube/PTFE composite material, which involves (i) treating carbon nanotube and glass fiber with an agate mortar, grinding, adding to acetone solution, ultrasonically dispersing for 1-3 hours, carrying out filtration and drying, (ii) adding carbon fibers to 20-25 pts. wt. ethanol solvent having concentration of 95%, ultrasonically dispersing uniformly, adding acetic acid to adjust the pH to 4-5, adding 8-12 pts. wt. KH550 (RTM: ( gamma )-aminopropyltriethoxysilane) silane coupling agent, stirring for 8-15 hours, washing with deionized water, and vacuum drying, (iii) oxidizing the graphene oxide to the graphene peroxide using remaining ethanol solvent having concentration of 95% through glow discharge plasma technology, (iv) adding the graphene peroxide to dimethylformamide, ultrasonically processing for 2-3 hours, stirring, sequentially adding 4-dimethyl aminopyridine, dicyclohexyl carbodiimide and the carbon fiber, reacting at room temperature for 18-36 hours, washing with deionized water and vacuum drying to obtain graphene peroxide-grafted carbon fiber, (v) adding the powder to the polyisocyanate JQ-1, mechanically stirring evenly, adding the dried steel fiber, stirring for 1-3 hours, washing and dry, (vi) mixing the carbon nanotube and the glass fiber obtained in step (i), graphene peroxide-grafted carbon fiber, resulting mixture obtained in step (v), and 70-75 pts. wt. PTFE, mixing together in a high-speed mixer, cold forming, sintering in air atmosphere at 360-390 degrees C to obtain plate-like sample having diameter of 150-250 mm and thickness of 3-4 mm, (vii) immersing the plate-like sample in a dipping solution for 4-8 minutes, drying in an oven at 80-100 degrees C, sintering in a muffle furnace at a temperature of 120-200 degrees C for 10-30 minutes and taking out. The preparation of the dipping solution involves grinding silicon dioxide by a grinder, dispersing remaining PTFE and remaining KH550 (RTM: ( gamma )-aminopropyltriethoxysilane) silane coupling agent together in water and ultrasonically dispersing evenly.