Antimicrobial and Barrier Properties of Bovine Gelatin Films Reinforced by Nano TiO2

The effects of nano titanium dioxide incorporation were investigated on the water vapor
permeability, oxygen permeability, and antimicrobial properties of bovine gelatin films. The nano TiO2 (TiO2-
N) was homogenized by sonication and incorporated into bovine gelatin solutions at different concentrations
(e.g. 1, 2, 3, and 5% w/w of dried gelatin). The permeability of the films to water vapor and oxygen was
significantly decreased by incorporating of low concentration TiO2-N to gelatin solutions. TiO2-N gelatin films
showed an excellent antimicrobial activity against Staphylococcus aureus and Escherichia coli. These
properties suggest that TiO2-N has the potential as filler in gelatin-based films for using as an active packaging
materials in pharmaceutical and food packaging industries.

The effects of nano titanium dioxide incorporation were investigated on the water vapor
permeability, oxygen permeability, and antimicrobial properties of bovine gelatin films. The nano TiO2 (TiO2-
N) was homogenized by sonication and incorporated into bovine gelatin solutions at different concentrations
(e.g. 1, 2, 3, and 5% w/w of dried gelatin). The permeability of the films to water vapor and oxygen was
significantly decreased by incorporating of low concentration TiO2-N to gelatin solutions. TiO2-N gelatin films
showed an excellent antimicrobial activity against Staphylococcus aureus and Escherichia coli. These
properties suggest that TiO2-N has the potential as filler in gelatin-based films for using as an active packaging
materials in pharmaceutical and food packaging industries.