Objectives

WP1 Synthesis of highly electrically conducting carbon materials for EMC applications.

Objectives
•    to synthesise highly porous monoliths, in the form of glasslike carbon foams or composite glassy carbon - graphite foams of different bulk densities and pore size;
•    to produce carbon powders having various grain morphologies and intrinsic electrical properties, from isotropic spheres to highly anisotropic flakes, wires and tubes, i.e. multi-walled carbon nanotubes, artificial graphite, exfoliated graphite (worm-like particles), thick graphene, carbon blacks having different surface areas, and activated carbon of different granulometries;
•    to describe all materials in terms of porosity (from subnanometre to macroscopic scales), surface area and characteristic sizes as well as dc conductivity (or sheet resistance).

 

WP2 Fabrication of polymer/carbon and polymer/nanocarbon composites with low filler concentration (0.25-2 wt.%). Broad-band dielectric spectroscopy of manufactured composites, investigation of electrical percolation phenomenon.

Objectives
•    to fabricate polymer/carbon and polymer/nanocarbon composites filled with small amounts (0.25 – 2 wt.%) of artificial graphite, natural graphite, exfoliated graphite (worm-like particles), thick graphene, carbon blacks having different surface areas, graphene nano-plates, activated carbon of different granulometries as well as commercial CVD-made single-walled and multi-walled carbon nanotubes (SWCNT and MWCNT), lab-made CVD and arc-discharge CNTs;
•    to functionalize CNTs and other carbons to be embedded into polymer for better dispersion;
•    to investigate homogeneity and uniformity of carbon dispersion using TEM and SEM;
•    to provide broad-band dielectric spectroscopy of manufactured composites in order to investigate the electrical percolation threshold.

 

WP3 Modeling of electromagnetic response properties of carbon foams, PyC nano-thin films and polymers filled with carbons of high surface area as randomly inhomogeneous medium taking into account cells’/grains’ size and non-spherical shape.

Objectives
•    to determine the physical principles and to develop a model of microwaves interactions with carbon foams;
•    to simulate radiation transmission/absorption in nano-thin carbonaceous films;
•    to develop electromagnetic methods of estimation of effective carbons/nanocarbon concentration in polymer composite (mass fraction of carbon fillers not screened electromagnetically and thereby taking part in the electromagnetic interaction with microwaves)

 

WP4 Comparative study of EM shielding effectiveness and ac conductivity of tannin-derived carbon foam, nano-thin carbon films, polymer/carbon and polymer/nanocarbon composites.

Objectives
•    to study in microwave frequency range the electromagnetic response properties of composites filled with carbons of high surface area (EG, TG, activated carbon, carbon black CBH, graphene nano-plates, CNTs) and natural and artificial graphites as well as commercial carbon black for comparision;
•    to examine the dependence of absorption/reflection provided by carbon foams on their bulk densities, pore size and thickness of sample;
•    to study experimentally the peculiarities of the electromagnetic response of carbonaceous nanothin films (PyC and graphene) in microwaves range;
•    to provide comparative analysis of all abovementioned carbon material to be used for EMC applications; to observe, if any, some synergy of EM properties of all investigated materials.