Preparation method based on carbon nanotube conductive material

Abstract

The invention discloses a preparation method based on a carbon nanotube conductive material. The method comprises the following steps: (1) immersing the carbon nanotubes in a hydrochloric acid solution having a mass fraction of 30% for 8 to 12 hours, washing the materials, adding concentrated nitric acid and concentrated sulfuric acid having a volume ratio of 1:3, and refluxing the materials at 100 to 130 DEG C for 1 to 2h, and obtaining carboxylated carbon nanotubes; (2) mixing an aniline monomer, an ammonium persulfate solution and the hydrochloric acid solution, and magnetically stirring amixture for 20 to 24 hours under an ice bath condition at 0 to 5 DEG C to obtain polyaniline dispersion liquid; (3) adding the above carboxylated carbon nanotubes to the polyaniline dispersion liquid,stirring the materials for 10-20 min, adding the hydrochloric acid solution of sodium sulfanilate, ultrasonically dispersing the materials for 2 to 3 hours, filtering the materials, respectively using hydrochloric acid and acetone to wash and filter the product, and drying the materials in a vacuum oven at 50 to 60 DEG C for 10 to 15 hours to obtain the conductive material. In the method of the present invention, the degree of crystallization of polyaniline can be enhanced by adding the hydrochloric acid solution of sodium sulfanilate, and the thermal stability of the conductive material is increased.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a method for preparing a conductive material based on carbon nanotubes. Background technique [0002] Carbon nanotubes not only have the inherent nature of carbon materials, but also have the electrical and thermal conductivity of metal materials, the heat resistance and corrosion resistance of ceramic materials, the weavability of textile fibers, and the light weight and ease of processing of polymer materials. . As a reinforcement of composite materials, carbon nanotubes can make composite materials exhibit good strength, elasticity, fatigue resistance and isotropy, so carbon nanotube-reinforced composite materials may bring a leap in composite material performance. [0003] Polyaniline has attracted widespread attention due to its low monomer price, simple synthesis process, special doping mechanism, excellent electrical conductivity, good stability, and special optical, el...

AI Technical Summary

Problems solved by technology

However, the thermal stability of the composite material of carbon nanotubes and polyaniline in the prior art is not ideal