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Abstract
This study describes a new polysaccharide-based bionanocomposite developed through
solvent casting. Different concentrations (i.e., 0%, 1%, 3%, and 5% (w/w)) of nano
titanium dioxide (TiO2-N) were incorporated into soluble soybean polysaccharide (SSPS),
and the functional properties of the resultant SSPS films were estimated. Incorporation
of TiO2-N into the SSPS matrix decreased water vapor permeability from 7.41 to 4.44
× (10(-11)gm(-1) s(-1) Pa(-1)) and oxygen permeability from 202 to 98 (cm(3)μmm(-2)
d(-1) atm(-1)). Moisture content also decreased, the glass transition temperature
increased, and the mechanical properties and heat seal strength of the SSPS films
improved. SSPS bionanocomposite films showed excellent antimicrobial activity against
Escherichia coli and Staphylococcus aureus. In summary, TiO2-N shows potential use
as a filler in SSPS-based films for the food and non-food industries.