Preparation and properties of MWNT/PEK-C electrical conductive film

A kind of multi-walled carbon nanotubes (MWNT)/PEK-C composite film was prepared using WD-01 dispersing agent assistant ball-milling dispersion method and immersion coating technology. The effects of resin concentration, ball-milling time, coating solution storage time and MWNT content on the electrical conductivity of the film were analyzed, and the influences of carbon nanotubes and residual solvent on the thermal mechanical performance of the film were investigated. The results show that the MWNT is sheared and effectively dispersed using WD-01 dispersing agent assisting ball-milling dispersion method. Coating solution with higher viscosity effectively restrains the re-agglomeration of MWNT. Electrical conductivity of the film increases linearly with the increase of MWNT content from 8% to 33.3% (mass fraction). When carbon nanotubes content is 33.3%, the electrical conductivity of the film reachs up to 7.2 S/cm. Carbon nanotubes adsorbing solvent conduces the decrease of glass transition temperature (T(g)