Water vapor sorption and permeability of sustainable alginate/collagen/SiO2 composite films

Films based on polysaccharides and proteins have been widely studied as possible substitutes for food packaging from fossil sources. However, its notorious sensitivity to water is still one of the primary drawbacks. In this study, sodium alginate (SA) hydrolyzed collagen (HC) blend films containing SiO 2 nanoparticles were prepared reduce sensitivity. The behavior these regarding vapor sorption permeability (WVP) was reported nano-SiO concentrations ranging 10%. At each concentration evaluated, several classical mathematical models moisture isotherms adjusted identify mechanisms interactions between water. A reduction approximately 8% in film content, 30% WVP observed higher than 6%. addition, it exposed that exhibited a type III isotherm behavior, suggesting reduced polymeric matrix at low activity. Therefore, SA/HC/SiO composite could represent simple, economical sustainable alternative material with vapor. • alginate/hydrolyzed SiO2 prepared. greater increase . had isothermal behavior.