The growing accumulation of agricultural waste, particularly groundnut shells, presents significant environmental concerns due to methane emissions and greenhouse gas release from crop residue burning. Groundnut shell powder, a biodegradable byproduct, offers potential as a raw material for bio-nanocomposite films. This study focuses on the development of biodegradable packaging films from groundnut shell powder, evaluating their physicochemical and mechanical properties while optimizing process parameters. Experiments were conducted to optimize the process parameters, viz., shaker time (6, 12, and 18 h), shaker speed (160, 180, and 240 rpm), and concentration of laccase enzyme (80, 100, and 120 mg) to leach out maximum lignin content in short duration. Further, to stop enzymatic reaction, drying time, drying temperature, and storage condition (dark or light) were optimized to minimize the time of operation, maximize cellulose, and minimize lignin content for isolation of cellulose microfibers from peanut shell powder. The biodegradable film from groundnut shell powder was developed by solution casting method. The three types of films, viz., agar powder-based (AG), mixture of agar powder and peanut shell powder (PSP), and mixture of agar powder and cellulose microfiber (CMF), were developed at optimized conditions. The maximum thickness was achieved by the cellulose microfiber-based film. The transmittance value of agar film was lesser than that of CMF film and PSP. The CMF film's water solubility and tensile strength was observed highest in comparison to that of the other two films. CMF and PSP films had a higher opacity value than agar films. Due to the presence of lignin, it was found that PSP loses less weight than CMF film during the soil burial degradation test. Therefore, the findings suggested that CMF film possesses not only improved biodegradability but also superior physical and mechanical properties, which may be suitable for use as a food packaging material.

来源平台：BIOMASS CONVERSION AND BIOREFINERY