Thymol-loaded Zein-pectin composite nanoparticles as stabilizer to fabricate Pickering emulsion of star anise essential oil for improved stability and antimicrobial activity

The aim of the present study was to prepare a new antimicrobial Pickering emulsion of which the star anise essential oil was added to the oil phase, and to investigate the effect of stabilization by bio-based active nanoparticles consisting of zein and pectin loaded with thymol. First, the thymol-lo...

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Bibliographic Details
Published inJournal of food science Vol. 88; no. 9; pp. 3807 - 3819
Main Authors Li, Wei, Li, Wenqing, Wan, Yulian, Zhou, Tao, Wang, Longfeng
Format Journal Article
LanguageEnglish
Published United States Wiley Subscription Services, Inc 01.09.2023
Subjects
Antiinfectives and antibacterials
Antimicrobial activity
Antimicrobial agents
E coli
Emulsions
Essential oils
Food industry
Interface stability
Nanoparticles
Oils & fats
Pectin
Phase ratio
Rheological properties
Rheology
Surface tension
Thymol
Zein
fish fillet preservation
antibacterial Pickering emulsion
stabilization
zein-pectin nanoparticle
star anise essential oil
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Summary:The aim of the present study was to prepare a new antimicrobial Pickering emulsion of which the star anise essential oil was added to the oil phase, and to investigate the effect of stabilization by bio-based active nanoparticles consisting of zein and pectin loaded with thymol. First, the thymol-loaded zein/pectin composite nanoparticles (ZTNPs) were fabricated as uniformly distributed spherical nanoparticles with an average diameter of 200 nm through antisolvent precipitation. Second, the effects of nanoparticles' concentration, oil phase ratio, and storage time on the stability of emulsions were explored according to particle size potential, interfacial tension, rheology, and micromorphology. Finally, the antibacterial results showed that Pickering emulsion inhibited Escherichia coli and Staphylococcus aureus compared to the control group by nearly 7 log colony-forming unit/g at 36 h, which was twice as much as the inhibition by thymol or star anise essential oils and ZTNPs.. Therefore, the proposed Pickering emulsion with star anise essential oil could be used as a green and safe plant-derived antimicrobial agent in the food industry.
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ISSN:0022-1147
1750-3841
DOI:10.1111/1750-3841.16700