Preparation and investigation of curcumin-containing PLA composite films for food packaging application
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Date
2025-12-10
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Plovdiv University Press "Paisii Hilendarski"
Abstract
Polylactic acid (PLA) is a biocompatible and biodegradable natural polymer known as a promising biopolymer that can be used for food packaging due to its good physical and physicochemical properties. This biopolymer possesses excellent thermal processability, good oxygen barrier capacity, and complete biodegradability, and it is one of the materials used as a food packaging material. PLA has a significant potential for optimizing physical properties through material modifications, including in combination with natural additives as different polyphenols. Polyphenols are a class of naturally occurring compounds found in plants, which exhibit a wide range of beneficial properties, including antioxidant, anti-inflammatory, and antimicrobial activities. In the present paper PLA PLA-based composite films with incorporated polyphenol curcumin with different concentrations were investigated. PLA composite films were prepared using a solution casting method. The films obtained were charged in a corona discharge. The electret properties of the charged samples were studied. The possible surface potential decay mechanisms responsible for the electret’s behavior were discussed. It was established that the surface potential decay depends on the corona polarity and the type of films.
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Keywords
polylactic acid, curcumin, corona discharge, electret properties