جستجوی مقالات مرتبط با کلیدواژه "active film" در نشریات گروه "شیمی"

The aim of this study was to produce biodegradable photoluminescent film that has antibacterial and antioxidant properties suitable for active food packaging. Based on this, gelatin was used to prepare the active film. Phycocyanin nanoliposome, zero-valent iron nanoparticle and gold/iridium composite photoluminescent pigment were used to modify the chemical structure of gelatin film. The central composite design was used to investigate the effect of phycocyanin nanoliposome, iron nanoparticle and pigment in investigating transparency, color properties and antioxidant property of films. The antibacterial properties of the films were investigated against three strains of Escherichia coli (Gram negative), Staphylococcus aureus (Gram positive) and Bacillus cereus (Gram positive). Scanning electron microscopy (SEM) images of pure gelatin film and gelatin/phycocyanin liposome/iron/photoluminescence pigment (Gel/NL/Fe/P) composite film were examined and compared. SEM images showed the smooth and coherent surface of the gelatin film, where liposome, iron and gold/iridium nanoparticles were visible on the film surface. Examining the transparency of the film and the color properties of the films confirmed the significant effect of nanoliposome on these properties. Phycocyanin strongly increased the antioxidant property of the film by about 40%. Iron nanoparticles increased the antioxidant property of gelatin film by about 20%. Liposome and zero valent iron significantly increased the antibacterial properties of the films. The antibacterial activity of the films was almost equal to that of Staphylococcus aureus and Bacillus cereus and more than Escherichia coli. Gel/NL/Fe/P films with the ability to produce green color in dark conditions, with antioxidant and antibacterial properties, can be used in active food packaging, and can also be used as sensors or smart kits.