Preparation and Characterization of Ultrasound Treated Polyvinyl Alcohol/Chitosan/DMC Antimicrobial Films

Rui Li,Yaowen Liu,Yue Wang,Jie Xu,Saeed Ahmed

doi:10.3390/coatings9090582

Abstract

In this research, chitosan (CS) and poly (vinyl alcohol) (PVA) were adopted as a material, methacryloyloxyethyl trimethyl ammonium chloride (DMC) was added in various concentrations and was treated ultrasonically for the formation of films with the use of the polymer blending method. The influences exerted by the ultrasonication period on PVA/CS/DMC antimicrobial active materials underwent material characteristic tests. The consequences revealed that at the break of the compound films, ultrasonication raised the elongation and tensile strength on the whole. Ultrasonication further or also enhanced the light transmittance performance and composite films’ barrier property. Furthermore, the compound film with a DMC concentration of 2% had good antibacterial properties, the film’s inhibition rates against Staphylococcus aureus and Escherichia coli after ultrasonication were 79.23% ± 1.92% and 72.31% ± 1.35%, respectively.

Highlights

Over the years, health-related food packaging has attracted people's attention [1,2]
With the use of Fourier transform infrared (FTIR) spectroscopy, we described the characteristics of the films
We explored the samples with 100 total scans per Fourier‐transform infrared (ATR‐FTIR, Bruker Gmbh, Ettlingen, Germany) spectrometry

Summary

Introduction

Health-related food packaging has attracted people's attention [1,2]. Most of the food packaging materials that circulate commercially are petrochemical polymers not capable of being decomposed by bacteria, affecting physical safety and marine circumstance [3]. It is important to research a safe, cheap, antimicrobial, and biodegradable polymer film as a food packing material. Among all of the degradable polymers, poly (vinyl alcohol) (PVA) and Chitosan (CS) have aroused rising interest for their film-forming properties and prominent biocompatibility [5,6]. Many studies have already explored the composite films’ antimicrobial nature [7]. CS is a unique polysaccharide isolated from crustacean wastes, showing a broad application in food preservation [8]

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Conclusion