Development and comparative study of biodegradable packaging film from groundnut shell powder

Abstract

Abstract The present study was conducted for the development of biodegradable film from groundnut shell. Different physico-chemical properties viz. moisture content, ash content, bulk density, true density, cellulose content, hemicelluloses content and lignin content were measured using standard methods. Experiments were conducted to investigate the effects of different process parameters viz. shaker time (6, 12 & 18h), shaker speed (160, 180 & 240rpm) and enzyme concentration (80, 100 & 120mg) on lignin content and drying time (10,20 & 30h), drying temperature (50, 70 & 90◦C), dark or light condition (-1, 0 &1) on cellulose content, lignin content and moisture content on the composition of groundnut shell powder. The results of isolation of lignin from groundnut shell powder The optimization of process parameter was done using response surface methodology (RSM) design trial version 7 Box- Behnken Technique. The biodegradable film from groundnut shell powder was developed by solution casting method. The three types of films viz. agar powder based, mixture of agar powder and peanut shell powder and mixture of agar powder and cellulose microfiber was developed at optimized conditions. The different physico- mechanical properties of different types of films were measured. The maximum thickness was achieved by the cellulose microfiber-based film. The agar-based film had a minimum thickness of 0.18 mm. The transmittance value of agar film was lesser than that of CMF film and PSP. The CMF film's WS percentage decreased in comparison to that of the other two films. CMF film which is made with cellulose and agar, has a higher tensile strength than the other two films. CMF and PSP films had a higher opacity value than agar films. AG films show less weight loss, and when compared to PSP films, It was observed that PSP loses less weight than CMF film in the soil burial degradation test because lignin was present.