▎ 摘　　要

NOVELTY - Preparing nano thermally conductive acrylic yarn involves weighing 35-50 pts. wt. polyacrylonitrile, 80-150 pts. wt. dissolving liquid, 20-30 pts. wt. carbon-based micro-nano thermal conductive fillers, 20-30 pts. wt. metal-based micro-nano thermal conductive fillers, 20-30 pts. wt. non-metallic and non-carbon micro-nano thermal conductive fillers, 5-12 pts. wt. flame retardants, 0.5-3 pts. wt. compatibilizers, 0.5-3 pts. wt. antioxidants and 0.5-3 pts. wt. wetting agents. The polyacrylonitrile is dissolved in the dissolving solution after pretreatment to prepare a certain mass fraction of acrylic fiber stock solution, carbon-based micro-nano thermal conductive fillers, metal-based micro-nano thermal conductive fillers, non-metallic non-carbon micro-nano thermal conductive fillers, flame retardants, compatibilizers, antioxidants and lubricants are added into the acrylic fiber stock solution, mixed uniformly, and ultrasonically dispersed to obtain acrylic fiber spinning solution. USE - Method for preparing nano thermally conductive acrylic yarn. ADVANTAGE - The method enables to prepare nano thermally conductive acrylic yarn, which better conforms to the acrylic fiber into a fibrous shape, and the thermally conductive filler can form a rod-shaped thermally conductive strip in the fiber, effectively improves the thermal conductivity of the acrylic yarn and increases the application range of the acrylic yarn. DETAILED DESCRIPTION - Preparing nano thermally conductive acrylic yarn involves weighing 35-50 pts. wt. polyacrylonitrile, 80-150 pts. wt. dissolving liquid, 20-30 pts. wt. carbon-based micro-nano thermal conductive fillers, 20-30 pts. wt. metal-based micro-nano thermal conductive fillers, 20-30 pts. wt. non-metallic and non-carbon micro-nano thermal conductive fillers, 5-12 pts. wt. flame retardants, 0.5-3 pts. wt. compatibilizers, 0.5-3 pts. wt. antioxidants and 0.5-3 pts. wt. wetting agents. The polyacrylonitrile is dissolved in the dissolving solution after pretreatment to prepare a certain mass fraction of acrylic fiber stock solution, carbon-based micro-nano thermal conductive fillers, metal-based micro-nano thermal conductive fillers, non-metallic non-carbon micro-nano thermal conductive fillers, flame retardants, compatibilizers, antioxidants and lubricants are added into the acrylic fiber stock solution, mixed uniformly, and ultrasonically dispersed to obtain acrylic fiber spinning solution. The ultrasonic dispersion time is 10-15min. Acrylic spinning solution is extruded by a spinneret, coagulated, stretched in a water bath, and washed with water to form, and is thermally stretched and dried to obtain a nano thermal conductive acrylic yarn.