Antimicrobial electrospun ultrafine fibers from zein containing eucalyptus essential oil/cyclodextrin inclusion complex

•Eucalyptus essential oil has antimicrobial activity against Gram-positive and -negative bacteria.•Electrospun ultrafine fibers zein showed continuous and homogeneous microstructure.•Fibers with IC-β-CD/EEO has antimicrobial activity against S. aureus and L. monocytogenes. The aim of this study was...

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Bibliographic Details
Published in:International journal of biological macromolecules 2017-11, Vol.104 (Pt A), p.874-882
Main Authors: Dias Antunes, Mariana, da Silva Dannenberg, Guilherme, Fiorentini, Ângela Maria, Pinto, Vânia Zanella, Lim, Loong-Tak, da Rosa Zavareze, Elessandra, Dias, Alvaro Renato Guerra
Format: Article
Language:English
Subjects:
Anti-Infective Agents - chemistry
Anti-Infective Agents - pharmacology
beta-Cyclodextrins - chemistry
Electricity
Electrospinning
Eucalyptus - chemistry
Eucalyptus citriodora
L. monocytogenes
Listeria monocytogenes - drug effects
Membranes, Artificial
Microbial Sensitivity Tests
Oils, Volatile - chemistry
S. aureus
Staphylococcus aureus - drug effects
Ultrafine fibers
Zein - chemistry
Zein - pharmacology
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Summary:•Eucalyptus essential oil has antimicrobial activity against Gram-positive and -negative bacteria.•Electrospun ultrafine fibers zein showed continuous and homogeneous microstructure.•Fibers with IC-β-CD/EEO has antimicrobial activity against S. aureus and L. monocytogenes. The aim of this study was to produce ultrafine fibers from zein incorporated with a complex of eucalyptus essential oil (EEO) and β-cyclodextrin (β-CD) with antimicrobial properties by electrospinning technique. The EEO was characterized by chemical composition and antimicrobial tests against three Gram positive and four Gram negative bacteria. The inclusion complex (IC) was prepared with β-CD and EEO by co-precipitation technique and added at different concentrations in zein polymer solution using aqueous ethanol as solvent. The morphology, thermal properties, functional groups, and antimicrobial activity against L. monocytogenes and S. aureus of the ultrafine fibers were evaluated. The composite membranes containing 24% IC exhibited a greater reduction of growth as compared to the fibers without addition of IC. For L. monocytogenes the growth reduction was 28.5% and for S. aureus it was 24.3%. The electrospun IC-β-CD/EEO composite membranes are promising for use in antimicrobial applications, such as food packaging.
ISSN:0141-8130
1879-0003
DOI:10.1016/j.ijbiomac.2017.06.095