Chitosan/thyme oil systems as affected by stabilizing agent: physical and antimicrobial properties

0502255 - ÚH 2020 RIV CH eng J - Journal Article
Sedlaříková, J. - Janalíková, M. - Rudolf, O. - Pavlačková, J. - Egner, P. - Peer, Petra - Varaďová, V. - Krejčí, J.
Chitosan/thyme oil systems as affected by stabilizing agent: physical and antimicrobial properties.
Coatings. Roč. 9, č. 3 (2019), č. článku 165. E-ISSN 2079-6412
Institutional support: RVO:67985874
Keywords : antimicrobial activity * biopolymer film * chitosan * surfactant * thyme oil
OECD category: Polymer science
Impact factor: 2.436, year: 2019
Method of publishing: Open access

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.
Permanent Link: http://hdl.handle.net/11104/0294205