<p>Natural fibers play a significant role in the polymer nanocomposites due to its biodegradability, sustainability, ease of disposal and minimal energy required during processing. The utilization of sustainable materials in developing usable products is making a tremendous impact in the society by mitigating the problems caused by hazardous plastics. Recent research studies have focused on identifying promising natural fibres with superior mechanical properties. In this study, we explore the reinforcing ability of extracted pure plant-based nanocellulose fibres in PVA/PEC nanocomposite films. The produced nanocellulose was characterized using a combination of techniques, including ¹³C NMR, XRD, FTIR, DLS, and morphological examination via AFM and TEM, along with thermal analysis. The synthesized AgO/ZnO nano structures were used as inorganic filler. The nano structures were confirmed by using XRD, TEM and XPS analysis. The reinforcing effect of nanocellulose was investigated by incorporating varying concentrations of CNF into PVA/PEC films, followed by characterization using XRD and FTIR. The physical properties of the films were evaluated through TGA, WVTR and water contact angle measurements. Reduction in microbial viability results in the promising antibacterial activity. Biodegradability was assessed through a soil burial test, where the observed weight loss indicated good biodegradation behavior with a controlled degradation rate. The overall study provides a comprehensive analysis of nanocellulose extraction and its effective use as a reinforcing agent in polymer blends. In conclusion, the extracted nanocellulose demonstrates significant potential for enhancing the structural and functional properties of nanocomposite films for sustainable applications.</p>