antimicrobial and hydrophilic behavior of soluble soy polysaccharide starch/cold water fish gelatin films incorporated with nano-titanium dioxide

Edible films based on starch are applied for food protection to extend shelf-life of food products. the biodegradability of film compounds was significantly improved by the utilization of biopolymer molecules in comparison to petroleum packaging, and it could be a replacement for synthetic packaging. in the presentation work, the effects of nano titanium dioxide (tio2-n) were studied on the moisture content, water solubility, moisture uptake, and antimicrobial properties of soluble soy polysaccharide (ssps) starch/cold water fish gelatin films. the nano titanium dioxide was incorporated into the ssps starch/cold water fish gelatin dispersion at various levels (1, 2, 3, and 5 w/w% based on ssps starch). the moisture content of the biofilms decreased from 14.12% to 12.28% and water solubility decreased from 93.18% to 71.46% by the incorporation of 5% tio2-n into the biopolymer matrix. increasing tio2-n from 0 to 5% decreased the moisture uptake, a value of 9.83&-6.81 g/g dried film. according to an increased inhibition zone of 1-5% tio2-n for staphylococcus aureus and escherichia coli from 32.44 to 62.27 mm² and from 22.15 to 45.17 mm² respectively, ssps starch/cold water fish gelatin/tio2-n films showed antimicrobial characterizations against staphylococcus aureus and escherichia coli. in summary, tio2-n improves the functional properties of ssps/cold water fish gelatin biofilms and can be applied in the food industry.