نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار گروه علوم و صنایع غذایی، دانشکدۀ کشاورزی، دانشگاه تبریز، تبریز
2 کارشناس ارشد گروه علوم و صنایع غذایی، دانشکدۀ کشاورزی، دانشگاه تبریز، تبریز
3 استادیار گروه علوم و تکنولوژی پلیمر، دانشکدۀ مهندسی شیمی و نفت، دانشگاه تبریز، تبریز
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The main objective of this study was to produce LDPE active films containing metallic nanoparticles (Ag, ZnO and CuO) and to investigate their physical, mechanical and anti-microbial characteristics. Three types of metallic nanoparticles at concentrations of 1% (w/w) were added to low density polyethylene (LDPE) and the films were prepared using melt extrusion technique. SEM results indicated rather uniform distribution of nanoparticles in polymeric matrix. Ag containing film showed highest tensile strength and Cu containing film showed the highest elongation to break values. Films containing ZnO nanoparticles had the highest UV absorption. A 99.9% reduction in Escherichia coli and a 90% reduction in Staphylococcus aureus were observed for films containing all nanoparticles which were evaluated by colony counting. However, ZnO nanoparticles were more effective in retarding the growth of S. areus and Ag and Cuo were more effective for E. coli.
کلیدواژهها [English]
Zhou, L., Lv, S., He, G., He, Q. & Shi, B. (2011) Effect of PE/AG2O nano-packaging on the quality of apple sclices. Journal of Food Quality, 34(3), 171-176.