Continuous carbon nano tube fiber-reinforced PA6 thermoplastic composite material and preparation method thereof

Abstract

The invention relates to the technology of carbon nano tube fiber, in particular to a continuous carbon nano tube fiber-reinforced PA6 thermoplastic composite material and a preparation method thereof. The preparation method comprises the following steps: firstly mixing 100 parts of PA6 resin, 0.1 to 0.5 part of an antioxygen, 0.2 to 1 part of a flowing accelerant, 1 to 5 parts of a compatibilizer and 2 to 10 parts of a flexibilizer, extruding the mixture into a hanger type die head for shunting through fusion mixing of a double / single screw unit, entering into an S-shaped die head for carrying out sufficient impregnation on active carbon nanot tube fiber, carrying out cooling water cooling pelleting, and finally preparing the continuous carbon nano tube fiber-reinforced PA6 thermoplastic composite material. According to the composite material disclosed by the invention, the mechanical property is greatly promoted, and based on a continuous network structure, the electric conduction and heat conduction performances of the composite material are also greatly improved.

Description

technical field

[0001] The invention relates to carbon nanotube fiber technology, in particular to a continuous carbon nanotube fiber reinforced PA6 thermoplastic composite material and a preparation method thereof. Background technique

[0002] Since carbon nanotubes (CNTs) were observed in vacuum arc-evaporated graphite electrodes in the 1990s, CNTs have aroused widespread interest from experts in different research fields worldwide because of their unique structures and excellent properties. Carbon nanotubes have good mechanical properties. The tensile strength of CNTs reaches 50-200GPa, which is 100 times that of steel, but the density is only 1 / 6 of steel, which is at least an order of magnitude higher than that of conventional graphite fibers; its elastic modulus can reach 1TPa. , equivalent to the modulus of elasticity of diamond, about 5 times that of steel. Its excellent mechanical properties, electrical properties, high thermal conductivity, good thermal and chemi...