Ultrasonic-assisted in-situ synthesis of waste-derived cellulose–polyaniline composites with enhanced electrical conductivity and electrochemical performance
摘要
Cellulose–polyaniline (CP) composites were synthesized via ultrasonic-assisted in-situ oxidative polymerization using cellulose microfibers derived from waste paper. The influence of cellulose loading (5–15 wt%) on structural, morphological, and electrochemical properties was systematically investigated. Spectroscopic and diffraction analyses confirmed hydrogen bonding interactions between cellulose and polyaniline, promoting improved interfacial compatibility. FESEM analysis revealed that 10 wt% cellulose resulted in uniform dispersion, while higher loading induced agglomeration. The optimized composite (10CP) exhibited significantly enhanced electrical conductivity (2.45 × 103 S cm⁻1) and reduced charge transfer resistance compared to pristine PANI. Electrochemical measurements demonstrated improved redox activity and capacitive behavior, attributed to synergistic interactions and efficient charge transport pathways. This study highlights the potential of waste-derived cellulose as a sustainable reinforcing filler for high-performance conductive composites in electronic and energy storage applications.