Biomass-derived materials: Promising, affordable, capable, simple, and lightweight microwave absorbing structures

Ever-growing electronic devices producing/applying microwaves have excited global concern due to augmenting the novel pollution realized from them. It is worth noting that various microwave absorbing materials have been developed to equip us against the ever-increasing hazard along with the inescapable mechanical life in telecommunication era. Microwave absorbing materials mainly benefit from their permeability, permittivity, and impedance matching. However, conjugated carbon allotropes and morphologies as dielectric materials have currently supplied fascinating characteristics owing to their eye-catching electric conductivity and polarization capability. The vital reason behind aforementioned phenomenon is particularly originated from pi -> pi* charge transitions provided by pyrolization of each organic precursor above 500 degrees C under an inert atmosphere. Among them, biomass-derived materials are under the spotlight due to their free and available resources. Interestingly, bio-inspired structures have sinchronaizly illustrated salient microwave absorbing, simple processability, lightweight, low-cost, and thin thickness characteristics. This review presents an overall overview associated with the employed biomass types, experimental methods, as well as commanding mechanisms, paving the way for achieved outstanding microwave absorbing characteristics of these types of materials. Besides, provided research shed a new light on architecting microwave absorbing and booster materials by considering eco-friendly approaches.