Department of Processing and Food Engineering, Punjab Agricultural University, Ludhiana-141004, India
Experiments were conducted to develop polysaccharide based edible films i.e. carboxy methyl cellulose (CMC) and sodium alginate (SA) along with glycerol (1%) as a plasticizer. The films were developed by varying the concentrations i.e. CMC (0.5, 1.0 and 1.5%); SA (1.0, 2.0 and 3.0%) and were evaluated for physical properties (film thickness, water vapour transmission rate and colour, moisture content) and mechanical properties (tensile strength and percentage elongation at break). The coating treatments significantly affected the selected physical and the mechanical properties (p<0.05). The results revealed that the film thickness, tensile strength, water vapour transmission rate, colour attributes increased whereas the moisture content and percentage elongation at break decreased with the increase in coating concentrations irrespective of the type of film.
Carboxy methyl cellulose (CMC), edible films, glycerol, mechanical properties, sodium alginate (SA)
