نوع مقاله : تالیفی
قوچان، دانشگاه آزاد اسلامی، دانشکده مهندسی شیمی، گروه مهندسی شیمی
عنوان مقاله [English]
Nowadays, one of the challenges encountered by food packaging industry is a high demand for fresh, healthy and with minimum processed foods. Selecting materials with their appropriate packaging method can be helpful to maintain product quality. Today, due to reductions in petroleum products and petrochemicals, rapid global warming and environmental pollution, bioactive polymers have attracted much attention in bioactive packaging. In this study, raw materials, manufacturing process and applications of polylactic acid (PLA) are discussed. PLA is a linear aliphatic thermoplastic polyester which can be derived from 100% renewable sources such as corn, but, most initial uses are limited to medical applications such as sutures. Nowadays this polymer is extensively used for packaging, textile and manufacturing plastic containers and biologically degradable polymers. The processing of such agricultural products and wastes has replaced to petroleum based products. This implies that biorefinery can lower the chemical costs and save energy for production of plastics and facilitate conditions to reduce waste materials from garbage.