Development of carbon nanotube/poly(aniline-co-acrylonitrile) composites for electromagnetic interference protection and resonator applications

Organic electronics is a newly developing class of materials that offer many advantages in terms of flexibility, availability, durability, applicability and cost compared to traditional electronic technologies such as silicon, germanium and gallium arsenide. Among various organic electronic materials, composites of carbon nanotubes (CNTs) with polyaniline (PANI) have attracted attention due to their excellent charge transport processes as a result of the π-π stacking of PANI resulting from the separation of CNTs. Recently, it was reported that CNTs could be produced with an aniline-based copolymer instead of PANI, thus improving charge transport, which is a promising development for thermoelectric (TE) applications. Although interesting results can be obtained in terms of geometric and magnetic properties of CNTs with aniline-based copolymers, this technology still exists with only a few successful reports in research. Therefore, the present study aims to prepare multi-walled carbon nanotube (MWNT)/poly(aniline-co-acrylonitrile) composites and to investigate the electromagnetic shielding performances of the composite materials. The composites were prepared by the emulsion copolymerization method placed in the chamber at various MWNT loadings and then re-doped with camphorsulfonic acid in m-cresol medium before proceeding to the measurements. The samples can be linked by FT-IR, XRD, SEM and VSM analyses. The vectors of the permittivity and permittivity values of the composites were determined by the Nicolson-Ross-Weir method over the scattering permit obtained in the X-band using the network analyzer, and their electrical conductivities were operated by the 4-point probe method. Finally, the electromagnetic shielding performance was determined by the scattering permit again.