Аннотация:This paper presents carbon nanotubes-containing polymer composites with layered gradient structurehaving electromagnetic interference (EMI) shielding properties. Polymer composite films wereobtained on metal surface by aerosol deposition of a dispersion of carbon nanotubes in thesolution of a copolymer of vinylidene fluoride with hexafluoropropylene (SCF-26) in acetone.Single-wall TUBALL (OCSiAl) carbon nanotubes were used. Three-layer coatings were formed witha concentration of nanotubes decreasing in each subsequent deposited layer. The reflection coefficientof electromagnetic radiation in the range of 20–35GHz was measured. Gradient samples hadsignificantly better characteristics compared to samples with uniform concentration of carbonnanotubes: the reflection coefficient reached 6dB at 35 GHz. The outer layer of gradient structurewith 0.1 wt % CNT provides a better matching of the wave resistance with free space and asmooth entrance of an electromagnetic wave into the sample. The subsequent layers with anincreasing concentration of single-walled carbon nanotubes (0.3 and 0.5%) absorb electromagneticradiation. Polymer elastomer composite EMI shielding coatings with concentration gradient can beapplied by aerosol deposition to the surfaces of any composition and shape. Our results couldserve as a design tool in carbon nanotubes - based EMI shielding flexible polymer coatings.
