▎ 摘　　要

NOVELTY - Preparing carbon nanotube-based flexible temperature-sensitive materials by 3D printing comprises adding multiwalled carbon nanotubes into deionized water, ultrasonically dispersing, adding cetyltrimethylammonium bromide, ultrasonically processing the mixed solution in an ice bath, adding black phosphorus into deionized water, ultrasonically dispersing in an ice bath, mixing the solution, drying and solidifying the electrostatic mixed solution, grinding it into powder, ultrasonically dispersing in an ice bath, adding thermoplastic polyurethane into organic solvent, stirring and mixing the dispersion and the translucent viscous solution, drying and solidifying to obtain a nanocomposite film, and cutting the nanocomposite film into pellets, adding to a banbury mixer for melt blending, drying and pelletizing and then adding to a single-screw extruder to extrude the wire rod, processing the extruded wire rod and shaping by 3D printing according to the designed model. USE - The method is useful for preparing carbon nanotube-based flexible temperature-sensitive material by three-dimensional printing. ADVANTAGE - The method adopts electrostatic solution mixing and banbury blending to disperse each other more uniformly, and adopts a bottom-up 3D printing method to construct a highly sensitive three-dimensional graphene conductive network more accurately and flexibly. The flexible temperature-sensitive material has high flexibility by melt deposition printing, sensitivity and durability of excellent sensing material, and improved spider three-dimensional conductive network, and develops high flexibility. DETAILED DESCRIPTION - Preparing carbon nanotube-based flexible temperature-sensitive materials by 3D printing comprises (1) adding 10-20 mg multi-walled carbon nanotubes into 20-40 ml deionized water, ultrasonically dispersing for 1-2 hours, adding 5-10 mg of cetyltrimethylammonium bromide, and ultrasonically processing the mixed solution for 1-2 hours in an ice bath to obtain the modified positively charged multi-walled carbon nanotube solution, (2) adding 5.5-24 mg black phosphorus into 11-48 ml deionized water, and ultrasonically dispersing in an ice bath for 1.5-2.5 hours to form a negatively charged black phosphorus solution, (3) mixing the solution according to a volume ratio of 1:1 to obtain an electrostatic mixed solution, and (4) drying and solidifying the electrostatic mixed solution, grinding it into powder, taking 8-10 mg, adding it to 80-100 ml of organic solvent, and ultrasonically dispersing in an ice bath for 1-2 hours to obtain a dispersion, (5) adding 10-15 g thermoplastic polyurethane into 100-200 ml organic solvent, stirring while adding, and stirring for more than 10 hours to be a translucent viscous solution, and (6) stirring and mixing the dispersion of step (4) and the translucent viscous solution, drying and solidifying to obtain a nanocomposite film, and (7) cutting the nanocomposite film into pellets, adding to a banbury mixer for melt blending, drying and pelletizing and then adding to a single-screw extruder to extrude the wire rod, processing the extruded wire rod and shaping by 3D printing according to the designed model.