Antimicrobial cellulose acetate films by incorporation of geranyl acetate for active food packaging application

Laura Cassol Mohr Celuppi,Rubieli Carla Frezza Zeferino,Ana Paula Capelezzo,Micheli Zanetti,Márcio Antônio Fiori,Humberto Gracher Riella,Leticia Bavaresco Cima

doi:10.33448/rsd-v11i1.25141

Abstract

The development of new antimicrobial polymeric materials is in prominence due to its versatility of applications, especially for the manufacture of active packaging food. Cellulose acetate is an example of polymeric material used to this purpose, due to its characteristics of biodegradability and easy processing, in addition its natural origin and no toxicity. Geranyl acetate is an ester derived from geraniol, which has good antimicrobial properties and good thermal stability, which makes it interesting to be applied as an antimicrobial agent, avoiding the trivial and often problematic metallic nanoparticles and also volatile essential oils. In this work, antibacterial and antifungal cellulose acetate films were obtained through the incorporation of geranyl acetate ester (in concentrations of 0.5 and 1.0% v/v), by using the casting technique. This new material was tested against gram-positive and gram-negative bacteria and fungi. Results showed that it is possible to obtain antibacterial and antifungal cellulose acetate films with the incorporation of geranyl acetate ester, with excellent antibacterial activity against gram-positive and gram-negative bacteria and good antifungal activity.

Highlights

The fossil raw materials replacement by renewable alternatives is a trend that contributes to the generation of more suitable materials for the recycling and that are biodegradable (Zhu et al, 2016)
The main objective of this work was to obtain an antibacterial cellulose acetate films with the incorporation of the geranyl acetate ester, in the shortage view studies that use an ester as an antimicrobial agent in polymeric materials
3.1 Evaluation of bacterial growth inhibition on the films surface: In order to evaluate the antibacterial potential of cellulose acetate films incorporated with geranyl acetate ester, the death curve test was performed

Summary

Introduction

The fossil raw materials replacement by renewable alternatives is a trend that contributes to the generation of more suitable materials for the recycling and that are biodegradable (Zhu et al, 2016). An example are biodegradable polymers/biopolymers, which consist of materials that can be consumed spontaneously, through the action of microorganisms such as naturally occurring bacteria, fungi and algae, along with other processes such as photodegradation, oxidation and hydrolysis, providing a reduction in the accumulation of solid waste in ecosystems (Zhong et al, 2019). Most of these materials use renewable natural biomass as a raw resource for obtaining them, as they have the advantage of reducing the impact on the environment, especially carbon dioxide emissions (Al-Jahwari & Pervez, 2020). Developing an antimicrobial polymeric material that can be used to obtain active packaging and does not harm the environment is a challenge at a global level

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