Conductive Carbon Black Filled Polyvinyl Alcohol Composites for Efficient Electromagnetic Interference Shielding

다국어 초록 (Multilingual Abstract)

Excellent electromagnetic interference (EMI) shielding ability, lightweight, and good electrical conductivity are highly required for practical applications of EMI shielding materials, such as in areas of aerospace, aircraft and automobiles. In this work, a polyvinyl alcohol (PVA) based EMI shielding materials containing ketjen carbon black (K-CB) was prepared via solution mixing method. The morphological investigation shows the good dispersion and compatibility of K-CB in PVA matrix which leads to enhanced the thermal durability, EMI shielding efficiency and electrical conductivity. The prepared composites show low percolation threshold and promising high EMI shielding value of 28.4 dB for 10 wt% K-CB in X-band frequency. Those properties suggest that PVA/K-CB composites can be suitable for EMI shielding material particularly when lightweight, mechanically robust, and electrically conductive shield materials are required.