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.
Highlights
The detrimental activity of microbes of various types is one of the main reasons for the emergence of most human diseases
The novelty aspect study, we have made an attempt to determine the influence of UVC light on the properties concerns studying this influence of irradiation on chitosan-based films modified of thin films obtained from chitosan modified by different phenolic acids: ferulic, caffeic by phenolic acids which may function as chitosan cross-linkers as well as antioxidant and tannic acid
We have made an attempt to determine the influence of UVC light on the
Summary
The detrimental activity of microbes of various types is one of the main reasons for the emergence of most human diseases. Inadequate tools, air and various surfaces used when dealing with sterile tissues are the sources of pathogens [1]. The selection of an appropriate decontamination method is an extremely important stage in the process of designing materials applied for packaging. The expected effect can be achieved by the appropriate preparation of the material for sterilization, process conditions and subsequent storage if certain provisions are followed [2]. Chitosan is the polysaccharide which found widely used in biomaterials as it may be isolated from food industry byproducts [3]. It is safe and nontoxic, thereby, it may have contact with human tissues.
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