Development of biodegradable films containing pomegranate peel extract and potassium sorbate
Juliana Catti Flores Fidelis, Lívia Benossi Marchi, Mônica Regina da Silva Scapim, Nathália Dalabilia Gobetti, Fábio Yamashita, Antônio Roberto Giriboni Monteiro
Abstract
Biodegradable films of starch, poly butylene adipate-co-terephthalate (PBAT), and glycerol, containing pomegranate peel extract (PPE) and potassium sorbate (PS) as antimicrobial agents, were produced by blow extrusion. Films with and without PS presented similar isotherms, and there was no difference in water vapor permeability, which ranged from 2.45.10−9 to 2.99.10−9 g m−1 Pa−1 d−1. Films with PS and PPE had lower solubility coefficient, higher diffusion coefficient, lower tension at rupture and elastic modulus, and higher elongation than those without antimicrobial agents (control). Furthermore, films with PS and PPE had excellent processability, good mechanical properties, and water vapor barrier properties compatible with other biodegradable materials containing starch.