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Antimicrobial Carvacrol in Solution Blow‐Spun Fish‐Skin Gelatin Nanofibers
Author(s) -
Liu Fei,
Saricaoglu Furkan Türker,
AvenaBustillos Roberto J.,
Bridges David F.,
Takeoka Gary R.,
Wu Vivian C.H.,
Chiou BorSen,
Wood Delilah F.,
McHugh Tara H.,
Zhong Fang
Publication year - 2018
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.14076
Subject(s) - carvacrol , nanofiber , gelatin , antimicrobial , chemistry , food science , pulmonary surfactant , materials science , essential oil , composite material , organic chemistry , biochemistry
Carvacrol is a volatile monoterpenic phenol and main component of oregano essential oil that shows nonspecific antimicrobial activity against foodborne pathogenic bacteria. Fish‐skin gelatin (FSG) nanofibers encapsulating carvacrol (15%, 20%, 25%, and 30%, w/w FSG) were successfully prepared via solution blow‐spinning (SBS) technique using lecithin (2.475% wb) as the surfactant. FSG emulsions with lower carvacrol ratios (5% and 10%) showed higher values in particle size and surface tension as well as lower values in viscosity and modulus, which led to failure of maintaining nanofibers shape. The formed carvacrol‐FSG nanofibers showed round and smooth morphologies with average fiber diameters ranging from 103.2 to 138.1 nm as the carvacrol ratio increased from 15% to 30%. Carvacrol was evenly dispersed within the interior of nanofiber matrix. All carvacrol‐FSG nanofibers showed inhibitive effects against the growth of Escherichia coli , Salmonella enterica , and Listeria monocytogenes . Moreover, nanofibers with lower carvacrol ratios showed bigger inhibition zones for E. coli and L. monocytogenes (20 mm compared with 12.5 mm for lowest to highest carvacrol ratios, respectively). Nanofibers stored at 20 °C (51% RH) showed better retention (40% to 60%) for carvacrol during the first 4 weeks of storage, while nanofibers stored at 2 °C (70% RH) showed better retention (10% to 30%) at the end of storage. Practical Application Results obtained in the study may help with antimicrobial carvacrol addition levels for gelatin fiber preparation using solution blow spinning (SBS) method. SBS gelatin fibers with added antimicrobials have potential applications for food packaging and medical wound dressing.