Effect of moisture absorption and fiber orientation on electrical conductivity and electromagnetic interference shielding of carbon fiber reinforced bioplastic composites

Abstract

The aim of this study is to discuss the effect of moisture absorption on electrical conductivity and electromagnetic interference of the carbon fiber (CF) reinforced bioplastic composite. The composites were prepared by the hot press machine, and immersed in water for 20 and 40 days. The electrical conductivity measurements were carried out as a function immersed time. The electrical conductivity of CF with two layers is greater than that of one layer, because the electrical conductivity increases with increasing the volume filler of CF. The electrical conductivity slightly increases with increasing the immersion time. The EMI SE (electromagnetic interference shielding effectiveness) of the composite was examined with the frequency from 500 MHz to 2000 MHz. The EMI SE of the CF increases with increasing the content of the CF, and the EMI SE result of composite is around 50 dB to 60 dB. There is scarcely significant effect of orientation on composite on the EMI SE.

The Potential Applications of Reinforced Bioplastics in Various Industries: A Review

“…The graphene-reinforced PLA was also reported to have the potential to be used in orthopaedic and scaffold applications [ 81 ]. Besides, carbon fibre, which has high physical, mechanical, and thermal properties, are incorporated in PLA to impart excellent electrical conductivity and electromagnetic interference in the bioplastics, which then made it have the ability for electromagnetic interference (EMI) shielding [ 83 ]. A study conducted by Bozó et al (2021) stated that carbon-based conductive materials have high electrical conductivity and could be used as reinforcements for bioplastics, and they might be suitable to be an alternative for the metals in applications that do not require extremely high electrical conductivity [ 77 ].…”