The invention relates to the technical field of
synthetic fiber industry, in particular to a preparing method of high-performance
polyethylene fiber and carbon
nano tube composite
fiber. The preparing method of the high-performance
polyethylene fiber and carbon
nano tube composite fiber includes the steps that carbon nano tubes are added into concentrated
sulfuric acid, the
mixed solution is heated under the condition of magnetic stirring, a KMnO4 water solution is added,
reflux is carried out for 2-2.5 h at the temperature, and concentrated
sulfuric acid is added after cooling to obtain purified carbon nano tubes; the carbon nano tubes are added into ethyl
alcohol and ultrasonically treated for 1 h, heating and stirring are carried out under high-speed magnetic stirring, isopropanol liquid is added, filtering and
drying are carried out, and the functionalized carbon nano tubes are obtained through Soxhlet extraction; a high-performance
polyethylene fiber solution is prepared, the carbon nano tubes and
antioxidant are added, and high-performance polyethylene fiber and carbon
nano tube gel solution is prepared through ultrasonic treatment and heating; the high-performance polyethylene fiber and carbon nano tube gel solution is added into a double-screw
spinning machine to conduct
spinning to obtain gel protofilament, and extraction and
drying stretch are carried out to obtain the high-performance polyethylene fiber and carbon nano tube composite fiber. The fiber performance is improved.