The invention relates to the technical field of composite materials, and discloses a high-flame-retardant polypropylene composite material and a preparation method thereof. The invention obtains the high-flame-retardant polypropylene composite material by adding benzyl chloride chitosan, modified carbon nanotubes, silicon-modified boric acid and polypropylene into a twin-screw extruder for blending and extrusion. Benzyl chloride in benzyl chloride chitosan reacts with tertiary amines in modified carbon nanotubes and silicon-modified boric acid to form quaternary ammonium salt groups with antibacterial effects. When the polypropylene composite material burns, boric acid releases crystal water and forms a glassy coating on the material surface to achieve flame retardancy. Sulfur and silicon elements together form a flame-retardant system, and the carbon nanotubes also exert a flame-retardant effect.
Country Code: CN
Application Number: CN202411006074.6
