Thermal and Electromagnetic Properties of Polymer Holey Structures Produced by Additive Manufacturing

Multifunctional 3D-printed holey structures made of composite polymers loaded with nanocarbon were designed to serve simultaneously as GHz-radiation absorbing layers and heat conductors. The geometry of the structures was devised to allow heat to be easily transferred through, with special attention paid to thermal conductivity. Numerical calculations and a simple homogenization theory were conducted in parallel to address this property. Different structures have been considered and compared. The electromagnetic shielding effectiveness of the produced holey structures was measured in the microwave range

Effective carbon nanotube/phenol formaldehyde resin based double-layer absorbers of microwave radiation: design and modeling

Phenol formaldehyde resin (PFR) based composites with multiwalled carbon nanotube (MWCNT) additives (2 and 5 wt.%) were prepared and their electromagnetic (EM) properties were investigated in Ka‐band frequency range (26–37 GHz). It was demonstrated that the combination of such materials in a double‐layered structure allows achievement of the significant attenuation of EM radiation. The electromagnetic response of considered double‐layered system was modeled by solving the electric field integral equation, utilizing the Green's function technique. Absorption up to 96% in the 26–37 GHz frequency band was both predicted and experimentally observed

Effective carbon nanotube/phenol formaldehyde resin based double-layer absorbers of microwave radiation: design and modeling

Phenol formaldehyde resin (PFR) based composites with multiwalled carbon nanotube (MWCNT) additives (2 and 5 wt.%) were prepared and their electromagnetic (EM) properties were investigated in Ka‐band frequency range (26–37 GHz). It was demonstrated that the combination of such materials in a double‐layered structure allows achievement of the significant attenuation of EM radiation. The electromagnetic response of considered double‐layered system was modeled by solving the electric field integral equation, utilizing the Green's function technique. Absorption up to 96% in the 26–37 GHz frequency band was both predicted and experimentally observed