Brominated porous carbon material for terahertz radiation shielding

The porous carbon material obtained by thermal decomposition of acetonitrile on template CaO particles was brominated in saturated bromine vapor at room temperature. Modification of the porous carbon material led to the addition of 3 at.% bromine and an increase in its electrical conductivity by 3.2 times. Polymer films were made of polystyrene with the addition of starting or brominated porous carbon material in different concentrations (from 1 to 10 wt%) to study the effect of bromination on the electromagnetic properties of composite materials in the frequency range from 0.1 to 1.3 THz. An increase in the shielding of terahertz radiation shielding with increasing filler concentration in the polystyrene matrix has been shown. The change in the electronic structure of the filler during bromination increased the shielding ability of the polymer composite films several times at low filler content.