▎ 摘　　要

NOVELTY - Flame-retardant antistatic nylon comprises carbon nanotubes grafted with 6 molecules of nylon, single layer graphene grafted with 6 molecules of nylon, nano carbon black and free nylon 6, and carbon nanotubes attached in the surface of graphene sheets, nano carbon black is attached to the surface of carbon nanotubes and graphene, nano carbon black contains high DBP value nano carbon black and low DBP value nano carbon black, and low DBP value nano carbon black is added in high DBP 3-6 times (mass ratio) of nano carbon black. The mass ratio of nano carbon black, carbon nanotubes and graphene is 1.2-2.8:0.024-0.096 0.032-0.16, and carbon nanotubes and graphene are in nylon. The mass contents are 0.024-0.096 wt.% and 0.032-0.16 wt.%, respectively. USE - Flame-retardant antistatic nylon. ADVANTAGE - The flame-retardant antistatic nylon is increases the electrical conductivity and flame retardancy of traditional nylon, also has good spinnability, stable performance, cost-effective, low industrial difficulty and significant practical value. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a flame-retardant antistatic nylon, which involves: (A) adding 3 pts. wt. an aqueous dispersion of carboxylated carbon nanotubes, 4 pts. wt. an aqueous dispersion of graphene oxide, and 0.05 to 0.3 pts. wt. a molecular weight modifier to 100 pts. wt. a caprolactam melt; (B) stirring mixture at a high speed (300-500 revolution per minute) at 80 C to form a dispersion, where carboxylated carbon nanotubes have a carbon to oxygen ratio of 2.5-6, and the carboxylated carbon nanotube aqueous dispersion has a mass concentration of 1-4 wt.%, graphene oxide has a carbon to oxygen ratio of 2-5, and the graphene oxide aqueous dispersion has a mass concentration of 1-5 wt.%; (C) mixing the low DBP value nano carbon black and the high DBP value nano carbon black in a ratio of 3-6:1, adding the mixture and dispersing by an emulsification homogenizer, where nano carbon is mixed in total black weight of 1.2-2.8 under nitrogen protection; (D) heating dispersion at 250-270 degrees C in a polycondensation reactor, and reacting at 0.1-0.5 mega Pascal for 3 hours, and reacting under vacuum for 4 hours to obtain a polymer melt; (E) subjecting polymer melt to water-cooling granulation to obtain an antistatic composite nylon chip; and (F) subjecting slice to high-speed spinning to obtain an antistatic composite nylon, where melt temperature is 250-320 degrees C, the continuous spinning speed is 1000-4000 revolution per minute, and the draw ratio is 4-6 times.