Mechanical, Thermal, Electrical Characteristics and EMI Absorption Shielding Effectiveness of Rubber Composites Based on Ferrite and Carbon Fillers

Abstract

In this work, rubber composites were fabricated by incorporation of manganese-zinc ferrite alone and in combination with carbon-based fillers into acrylonitrile-butadiene rubber. Electromagnetic parameters and electromagnetic interference (EMI) absorption shielding effectiveness of composite materials were examined in the frequency range 1 MHz–3 GHz. The influence of ferrite and fillers combination on thermal characteristics and mechanical properties of composites was investigated as well. The results revealed that ferrite imparts absorption shielding efficiency to the composites in tested frequency range. The absorption shielding effectiveness and absorption maxima of ferrite filled composites shifted to lower frequencies with increasing content of magnetic filler. The combination of carbon black and ferrite also resulted in the fabrication of efficient EMI shields. However, the EMI absorption shielding effectiveness was lower, which can be ascribed to higher electrical conductivity and higher permittivity of those materials. The highest conductivity and permittivity of composites filled with combination of carbon nanotubes and ferrite was responsible for the lowest absorption shielding effectiveness within the examined frequency range. The results also demonstrated that combination of ferrite with carbon-based fillers resulted in the enhancement of thermal conductivity and improvement of mechanical properties.

Curing, Properties and EMI Absorption Shielding of Rubber Composites Based on Ferrites and Carbon Fibres

“…Imaginary permittivity correlates with dissipation of electrical energy (dielectric dissipation or losses). It is attributed to polarization mechanisms: interfacial polarization, electronic and dipole polarization, natural resonance and relaxation phenomena [ 46 , 47 ]. As suggested, presence of CF and high amount of interfaces in the rubber matrix increases interfacial filler–rubber polarization and leads to generation of dipoles on semi-conductive ferrite particles.…”

Research Progress with Membrane Shielding Materials for Electromagnetic/Radiation Contamination

“…At present, most membrane shielding materials are made by combining highly conductive elements with substrates by various methods, such as coating or mixing. However, numerous reported membranes shielding materials were based on non-renewable polymers [ 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ], which is inconsistent with the concept of green chemistry and sustainable development. Therefore, some biopolymers have attracted the attention of researchers [ 54 , 155 ].…”

“…However, with the rapid pace of technological development, the above-mentioned membrane shielding materials can no longer meet the problem of electromagnetic/radiation pollution caused by many types of modern technological devices. Therefore, more researchers have devoted themselves to the exploration of membrane shielding materials to protect humans and their environment, and these efforts have expanded to the preparation of many new membrane-based shielding materials, such as the use of 3D printing design [ 35 , 36 , 37 , 38 ], as well as the development of MXene-based [ 39 , 40 , 41 , 42 ], carbon-based [ 43 , 44 , 45 , 46 ], iron-based [ 47 , 48 , 49 , 50 ], cellulose-based [ 51 , 52 , 53 , 54 ], and lead-free materials [ 55 , 56 , 57 , 58 , 59 , 60 ]. The traditional electromagnetic/radiation shielding method was to directly blend conductive fillers to improve the shielding performance [ 61 ], especially in the field of electromagnetic radiation shielding.…”

Effect of carbon fiber reinforcement on the mechanical and electromagnetic shielding properties of the Fe3O4‐carbonaceous/epoxy composites

“…Earlier, metals were used as a suitable EMI shielding material due to their high conductivity, high strength, elasticity, brittleness, and toughness 3,4 . However, their weight, poor corrosion resistance and high cost limit their practical applications 5,6 . Later, Polymer composites have become the potential candidate with different filler and fiber reinforcement owing to their chemical resistance, high mechanical properties, and low shrinkage 7 .…”