The Physicochemical and Antibacterial Properties of Chitosan-Based Materials Modified with Phenolic Acids Irradiated by UVC Light

Abstract

This paper concerns the physicochemical properties of chitosan/phenolic acid thin films irradiated by ultraviolet radiation with wavelengths between 200 and 290 nm (UVC) light. We investigated the preparation and characterization of thin films based on chitosan (CTS) with tannic (TA), caffeic (CA) and ferulic acid (FA) addition as potential food-packaging materials. Such materials were then exposed to the UVC light (254 nm) for 1 and 2 h to perform the sterilization process. Different properties of thin films before and after irradiation were determined by various methods such as Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), atomic force microscopy (AFM), differential scanning calorimeter (DSC), mechanical properties and by the surface free energy determination. Moreover, the antimicrobial activity of the films and their potential to reduce the risk of contamination was assessed. The results showed that the phenolic acid improving properties of chitosan-based films, short UVC radiation may be used as sterilization method for those films, and also that the addition of ferulic acid obtains effective antimicrobial activity, which have great benefit for food packing applications.

Additive Manufacturing of Caffeic Acid-Inspired Mineral Trioxide Aggregate/Poly-ε-Caprolactone Scaffold for Regulating Vascular Induction and Osteogenic Regeneration of Dental Pulp Stem Cells

“…This suggests that CA and MTA were bounded with hydrogen bonds and thus do not reflect any structural changes to the FTIR results. Kaczmarek-Szczepanska et al fabricated chitosan scaffolds coated with CA and their FTIR results had similar trends to our study [ 34 ]. It was hypothesized from the above results that CA-coated MTA substrates could allow us to retain the original benefits of MTA, yet with the additional advantages that CA could bring about for hard tissue regeneration.…”

The Physicochemical, Antioxidant, and Color Properties of Thin Films Based on Chitosan Modified by Different Phenolic Acids

“…The addition of phenolic acids improved the thermal resistance of materials. Similar results were obtained by Sun et al, where the modification of chitosan films by the addition of young apple polyphenols resulted in the improvement of thermal properties [29]. It was found by Can et al that thermal transitions around 200 • are ascribed to complex processes, including the dehydration of the saccharide rings, the depolymerization of the acetylated and deacetylated units, and the galactose group of the polymer [30].…”

Bioactive Edible Films and Coatings Based in Gums and Starch: Phenolic Enrichment and Foods Application

“…Kaczmarek-Saczepanska and co-workers [120] have studied the incorporation of tannic, caffeic and ferulic acids in chitosan edible films. These films were irradiated with UVC light in order to sterilize them.…”

“…These films were irradiated with UVC light in order to sterilize them. Phenolic acids improved the physicochemical properties of films and ferulic acid showed good antimicrobial activity against S. aureus (Gram positive) and E. coli (Gram negative) [120].…”