Abstract

• This research concerns with preparation of bioplastics from starch (Solanum tuberosum L.). The aim of this work is to prepare biodegradable plastics from potato starch and to study the swelling and water uptake properties, physicomehanical properties, antimicrobial activity and biodegradability of the prepared bioplastics. The potato samples were purchased from Maydawee Market in North Okkalapa Township, Yangon Region, Myanmar. Starch was extracted from potato by cold extraction method. The extracted potato starch was characterized by FT IR technique. FT IR spectrum of extracted potato starch was compared with that of commercial starch. Bioplastic films SG-a, SG-b, SG-c, SGV-a, SGV-b and SGV-c were prepared from extracted potato starch using plasticizer as glycerol (4 %, 6 % and 10 %) with and without vinegar. All bioplastic films are clear and flexible. The degree of swelling and water uptake of prepared bioplastic films were determined. The physicomechanical properties (thickness, tensile strength, percent elongation at break and tear strength) of prepared bioplastic films were measured. The morphology of prepared bioplastic films was studied by SEM technique. In addition, the antimicrobial activities of all sample films were tested by agar well diffusion method against six microorganisms. Moreover, the biodegradability of prepared bioplastic films was evaluated by soil burial method. The prepared bioplastic samples were applied for food packaging.