Characterization and Evaluation of the Ag⁺‐Loaded Soy Protein Isolate‐Based Bactericidal Film‐Forming Dispersion and Films

Abstract

The films prepared in this study are biodegradable and will be used in medical and food fields.

Pumpkin seed oil cake/polyethylene film as new food packaging material, with perspective for packing under modified atmosphere

“…The solubility of films in water was about 35% for all tested samples and this solubility is similar to the value obtained for PuOC films without PE layer, as well as to films based on soy protein isolates and crosslinked gelatine films 9,14,21,39,40 . Considering that one side of the film was protected with PE layer it was expected that solubility of PuOC layer would be decreased due to the lower surface availability of PuOC layer.…”

“…14,21,32,[36][37][38] The solubility of films in water was about 35% for all tested samples and this solubility is similar to the value obtained for PuOC films without PE layer, as well as to films based on soy protein isolates and crosslinked gelatine films. 9,14,21,39,40 Considering that one side of the film was protected with PE layer it was expected that solubility of the normal direction, the elongation at break was 150-250% and in the parallel 100-150% for all films except CF/PE films. In CF/PE films, the elongation at break was significantly lower, and in both tested directions amounted about 50%.…”

Chitosan‐konjac glucomannan‐cassava starch‐nanosilver composite films with moisture resistant and antimicrobial properties for food‐packaging applications

“…The films S4, S5, and S6, incorporated with nanosilver particles exhibited the inhibition zone against S. aureus , C. albicans , and E. coli . The growth of microorganism was prevented in the film contact area due to the interaction between Ag + and the mercapto groups of the bacterial protein . This was because of the release of the active component, i.e ., silver ions from the film sample and diffusion into the agar medium, preventing the development of microbial colonies in the agar.…”

Antimicrobial nanostructured starch based films for packaging

“…C30B antimicrobial effect against bacteria can be explained by the release of ammonium salts from the nanoclay which affects the bacteria sensitive targets (Martins et al, 2013). For the samples containing Ag-NPs (Ag-NPs/ST-NC and Ag-NPs/C30B/ST-NC) no microorganism growth was observed in the film contact area for all tested concentrations, resulting from the interaction between Ag + and the mercapto groups of the bacterial protein (Sun et al, 2011). However, no inhibition halo was detected, suggesting that no diffusion of the active compounds occurred to agar.…”