Study of blend films from methacryloyl guar gum and sodium alginate

Films were prepared by the casting method using sodium alginate (SA) and methacryloyl guar gum (MAG) in different ratios. The concentration of SA ranged from 0% to 50% (v/v). Water vapor transmission rate and oxygen permeability of the films were investigated. Films were evaluated for mechanical and antibacterial properties. The water vapor transmission rate did not change significantly upon addition of SA. Films containing 15% (v/v) SA showed very low oxygen permeability, good tensile and puncture strength. The antimicrobial activity of films containing 15% (v/v) SA was comparable to MAG films against Escherichia coli and Staphylococcus aureus. Composite films obtained from SA and MAG may reduce environmental problems associated with synthetic packaging.