Polypropylene/liquid crystal elastomer/fullerene composite cable material and preparation method thereof

[0011] A polypropylene/liquid crystal elastomer/fullerene composite cable material, made of the following weight (kg) raw materials: polypropylene 43, liquid crystal elastomer 29, fullerene 26, white oil 9, phthalic acid two Isononyl ester 12, silica fume 18, pyrolus ore powder 7, power plant slag 11, calcium stearate 2.5, zinc stearate 1.5, polytetrafluoroethylene micronized wax 9, dichloroethyl aluminum 6, tri-isooctyl borate 12. Shuangfei powder 13, Andalusite 19.

[0012] A preparation method of polypropylene/liquid crystal elastomer/fullerene composite cable material includes the following steps:

[0013] (1) Mix the silica fume, power plant slag, andalusite evenly, crush, sieving, and calcinate at 720-780℃ for 1-2h. After cooling to room temperature, add the calcined powder to the mass according to the solid-liquid ratio of 1:5-7. In a 30% sulfuric acid solution, heat in a water bath to 50-60℃, soak for 2-3h, stand and cool, filter, wash the filter residue with water to neutral; then add water and stir the filter residue to make a slurry with a concentration of 50-55% , Add sodium hydroxide equivalent to 30-35% of the weight of the filter residue, heat it to boiling, keep it for 4-6h after keeping it warm for 3-4h, filter, and pass carbon dioxide gas into the filtrate to stop when pH=9-10. After aging for 2-4h, ultrasonic treatment for 20-40min, filtering, drying the filter residue, calcining at 580-640℃ for 1-1.5h, cooling to room temperature; finally, heating and melting the cooled powder into a molten liquid, and then using The high-speed argon inert gas with a flow rate of ≥260m/s sprays the molten liquid from the air-flow atomizer nozzle, and at the same time forms liquid droplets under the action of surface tension, and then cools and solidifies to obtain the required powder;

[0014] (2) Add polypropylene, liquid crystal elastomer, fullerene, white oil, diisononyl phthalate, calcium stearate, zinc stearate and the powder prepared in the above step (1) to the high-speed In the mixer, stir at high speed until the material temperature reaches 65-75°C, add the remaining raw materials, stir at high speed until the material temperature reaches 75-85°C, then transfer to the twin-screw extruder to melt and blend, extrude, granulate, and cool. Get the required cable material.

[0015] The main performance test results of the polypropylene cable material prepared in the above embodiment are shown in the following table:

[0016]