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Coatings 2019, 9(3), 165; https://doi.org/10.3390/coatings9030165

Chitosan/Thyme Oil Systems as Affected by Stabilizing Agent: Physical and Antimicrobial Properties

1
Department of Fat, Surfactant and Cosmetics Technology, Faculty of Technology, Tomas Bata University in Zlín, Vavrečkova 275, 760 01 Zlín, Czech Republic
2
Centre of polymer systems, Tomas Bata University in Zlín, Třída Tomáše Bati 5678, 760 01 Zlín, Czech Republic
3
Department of Environmental Protection Engineering, Faculty of Technology, Tomas Bata University in Zlín, Vavrečkova 275, 760 01 Zlín, Czech Republic
4
Institute of Hydrodynamics of the Czech Academy of Sciences, v.v.i., Pod Patankou 5, 166 72 Prague 6, Czech Republic
*
Author to whom correspondence should be addressed.
Received: 7 December 2018 / Revised: 14 February 2019 / Accepted: 26 February 2019 / Published: 1 March 2019
(This article belongs to the Special Issue Films and Coatings for Food and Health Applications)
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Abstract

Antimicrobial biopolymer films and coatings are of great interest for many applications. Different chitosan systems were prepared and characterized to evaluate the effect of their composition on the physical and antimicrobial properties. Three types of emulsifiers (Tween 20, 80, and 85) were used as stabilizing agents, combined with thyme essential oil (from two producers) applied as an active substance. A predominant role of the applied stabilizer and its hydrophilic–lipophilic balance value was proven. The incorporation of thyme essential oil and surfactant into the chitosan matrix led to a significant decrease of particle size in film-forming solutions, as well as a thickness increase and the enhancement of the barrier properties in chitosan films. Antimicrobial effects were provided even at the lowest tested concentration of thyme essential oil. Hence, the prepared chitosan films represent promising candidates in antimicrobial packaging applications. View Full-Text
Keywords: antimicrobial activity; biopolymer film; chitosan; surfactant; thyme oil antimicrobial activity; biopolymer film; chitosan; surfactant; thyme oil
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sedlaříková, J.; Janalíková, M.; Rudolf, O.; Pavlačková, J.; Egner, P.; Peer, P.; Varaďová, V.; Krejčí, J. Chitosan/Thyme Oil Systems as Affected by Stabilizing Agent: Physical and Antimicrobial Properties. Coatings 2019, 9, 165.

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