COMPOSITE MATERIAL FOR SHIELDING ELECTROMAGNETIC RADIATION, RAW MATERIAL FOR ADDITIVE MANUFACTURING METHODS AND A PRODUCT COMPRISING THE COMPOSITE MATERIAL AS WELL AS A METHOD OF MANUFACTURING THE PRODUCT

摘要

#$%^&*AU2020201098A120200917.pdf#####ABSTRACT A composite material for shielding electromagnetic radiation is disclosed. It comprises 88 99.88 wt% of a thermoplastic, electrically non-conductive polymer; 0.1 - 10 wt% of a nanocarbon material in form of flakes having a diameter to thickness ratio higher than 3, the thickness of the flakes not exceeding 30 nm and the diameter being of 100 to 5000 nm. It also includes 0.01 - 1 wt% of nanoparticles introducing a loss unrelated to electrical conductivity in a given frequency range, i.e. unrelated to the dispersion of an electromagnetic wave on free carriers, and 0.01 - 1 wt% of an auxiliary material which allows to control the dispersion of the nanocarbon material and the nanoparticles in a polymer matrix and/or which can change the properties of the nanocarbon material and the nanoparticles. The composite material is in form of a homogeneous mixture.1/2 0I-5 -c-10-15 -c ~-20en -25--- PEjgraphene(2%yanhydride(1%)inanoparticles(0.05%) .;,. PElgraphene(2%ynanoparticles(.5%)anhydride(0.05%) I ILIII 2,;G 4,OG GIOG 8,OG 10,OG 12.0G frequency [Hz] Fig. 1 0-0 -5- -5-10 -- 10C .-15 -- 15E (-20- -20b 0,1 0,2 0,3 0,4 0,5 0,6 0 iO8 0,9 4,00E+008 8,OOE+008 1,20E+0091,60E+009 frequency [THz] frequency [Hz] Fig. 2a Fig. 2b