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- Title
Biodegradable composites from polyester and sugar beet pulp with antimicrobial coating for food packaging.
- Authors
Li, Weili; Coffin, David R.; Jin, Tony Z.; Latona, Nicolas; Liu, Cheng-Kung; Liu, Bo; Zhang, Jinwen; Liu, LinShu
- Abstract
Totally biodegradable, double-layered antimicrobial composite films were introduced for food packaging. The substrate layers of the sheets were prepared from poly(lactic acid) (PLA) and sugar beet pulp (SBP) or poly (butylene adipate- co-terephthalate (PBAT) and SBP by a twin-screw extruder. The active layer consisting of antimicrobial in either PLA or chitosan was formed on the surfaces of the substrates by solution coating followed by solvent evaporation. Air-coupled ultrasonic evaluation and microscopic examination showed a homogeneous structure for the composite sheets. Mechanical analysis and acoustic emission demonstrated the double-layered composites possessing appropriate tensile strength and fracture characteristics for the use as light weight-bearing materials. The release of Nisaplin® or allyl isothiocyanate (AIT) effectively suppressed the growth of Listeria monocytogenes and Salmonella cells, respectively; the co-release of Nisaplin® and AIT played a synergistic effect on inhibition of L. monocytogenes. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
- Subjects
BIODEGRADABLE plastics; COMPOSITE materials; POLYESTERS; SUGAR beets; ANTI-infective agents; SURFACE coatings; FOOD packaging; DRUG delivery systems; EXTRUSION machines (Plastics)
- Publication
Journal of Applied Polymer Science, 2012, Vol 126, pE362
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.36885