The present invention relates to the technical field of polyamide fibers, and discloses a preparation method of high-performance polyamide fiber. The present invention prepares a high-performance polyamide fiber by adding polyamide fiber, epoxy phenolic resin, aminated carbon nanotubes and silicon-containing hyperbranched polymer into a twin-screw extruder for melt blending and extrusion, followed by injection molding with an injection molding machine. During melt blending, epoxy groups in the epoxy phenolic resin undergo ring-opening reactions with amino groups in the aminated carbon nanotubes and hydroxyl groups in the silicon-containing hyperbranched polymer, forming a stable crosslinked network among the three, which acts together on the polyamide fiber to improve its mechanical properties. Long chains in the silicon-containing hyperbranched polymer entangle with the polyamide fiber for tighter bonding and enhanced mechanical properties. Moreover, phenolic resin and carbon nanotubes themselves have good mechanical properties and flame retardancy.
Country Code: CN
Application Number: CN202410805466.2
