Microwave absorption performance of MWCNTS derived from plant based oil

Abstract

The carbon nano structure (CNS) have excellent dielectric properties and hence shows better microwaveabsorbingperformance. The economically obtained CNS are efficient microwave absorbing materials (MAMs) demonstrate a big potential in industrial and defense application. The synthesis of CNS from Plant based precursors has become one of the newest approach in the field ofmicrowaveabsorption due to its economical, immense availability and sustainability. Chemical Vapour deposition (CVD) is most utilized method to synthesize Multiwall Carbon Nano Tubes (MWCNTs) using plant based oil due to its easy to control experiment condition, economical, controllable diameters and better yield compare to others methods.Plant-based precursors i.e., Olive oil was used as source of carbon to obtained MWCNTs over Ni-Co catalyst in inert atmosphere of Hydrogen gas. Acid treated MWCNTs were characterized using XRD, FEG-SEM, EDAX, HR-TEM. The average diameter and length of MWCNTs are 48 nm and 736 nm, respectively. MWCNTs/Acrylic composite with 9 wt% and 3.8 mm thickness, shows an optimal Reflection loss (RL) value of −44.0 dB at 10.9 GHz. The effective absorption (RL ≤ -20 dB) has a bandwidth of 10.14–11.59 GHz.