The invention belongs to the technical field of carbon nanotube applications, and relates to a carbon nanotube conductive masterbatch and a preparation method thereof. The components of the conductive masterbatch are: multi-walled carbon nanotubes, wax, a dispersing auxiliary and a polymer. The specific preparation method comprises mixing white oil and wax, heating to melt the wax, adding multi-walled carbon nanotubes, a dispersing auxiliary and a polymer, dispersing uniformly under high-speed stirring, removing the white oil by pressing and drying, and then extruding, blending, strand-drawing and pelletizing to form a conductive masterbatch. The beneficial effects of the invention are: utilizing the good compatibility of white oil and wax in a molten state and their good wettability with carbon nanotubes, the multi-walled carbon nanotubes are effectively dispersed. After pressing, the dispersed state of the multi-walled carbon nanotubes is retained and enters the polymer melt, resulting in a masterbatch modified material with a low electrical conductivity threshold, solving the problem of difficult dispersion of multi-walled carbon nanotubes in high-viscosity polymer melts. The method features a simple process, little dust emission during processing, and recyclable white oil.
Country Code: CN
Application Number: CN202010147025.X
