Preparation method and application of carbon nano tube modified UHMWPE (Ultra High Molecular Weight Polyethylene) composite fiber

The invention relates to the technical field of high-performance fiber materials, and discloses a preparation method and application of a carbon nanotube modified UHMWPE composite fiber.The preparation method comprises the following steps that a multi-walled carbon nanotube is taken and placed in an oxidizing solution, the mixture is stirred to be uniform to form suspension liquid, the suspension liquid is subjected to suction filtration, washing and drying, and carbon nanotube powder is obtained; the UHHMWPE powder is subjected to ammonia plasma treatment, and UHMWPE surface amination is achieved; the preparation method comprises the following steps: putting UHMWPE powder subjected to surface amination into white oil to prepare a UHMWPE solution, and adding carbon nanotube powder subjected to surface carboxylation into the UHMWPE solution to prepare a composite gel solution; adding the composite gel solution into a twin-screw spinning machine, spinning at the temperature of 250-270 DEG C to obtain gel raw si