Properties of polysaccharide-coated polypropylene films as affected by biopolymer and plasticizer types

摘要: Plasticized polysaccharide coatings on polypropylene (PP) film were prepared to evaluate the optical and tensile properties of resulting coated films, as affected by biopolymer plasticizer types, in order develop a novel structure common plastics intended for food packaging applications. Composite structures PP with several kinds polysaccharides (MC, HPMC, chitosan, κ-carrageenan, dextrin) plasticizers (PG, glycerol, PEG, sucrose, sorbitol) obtained through simple casting method. High glossy surfaces observed films chitosan sucrose-plasticized coating giving highest gloss 142.7 GU. Biopolymers, but no plasticizers, exerted noticeable influence colour films. Chitosan- κ-carrageenan-coated also showed greater transparency, strength elongation than other Nisin-incorporated κ-carrageenan exhibited significant bacterial growth inhibition against Lactobacillus plantarum. The results suggest that based proper possess excellent visual mechanical characteristics have great potential acting efficiently antimicrobial agent carriers active systems. Copyright © 2004 John Wiley & Sons, Ltd.