A green approach for the development of functionalized graphene and cardanol‐based polybenzoxazine nanocomposite

Abstract A new facile synthesis of functionalized graphene (fg‐p) reinforced bio‐based polybenzoxazine nanocomposite (pbf2%–pbf10%) was developed in this work. Cardanol, formaldehyde, and furfuryl amine were used to make a bio‐based benzoxazine monomer (bf). bf and benzoxazine polymer (pbf) were characterized by Fourier transform infrared (FT‐IR) and nuclear magnetic resonance spectroscopies, and fg‐p was characterized by FT‐IR spectroscopy, X‐ray diffraction, and scanning electron microscopy. The electrochemical properties of the fg‐p sheets and their nanocomposites (pbf2%–pbf10%) were examined using cyclic voltammetry and electrochemical impedance spectroscopy. The results of electrochemical measurements showed that pbf4% has the largest specific capacitance of 78.2 F/g when compared to pbf (36.98 F/g), which shows that fg‐p reinforced pbf nanocomposites have potential application as the high‐performance capacitor electrode material.