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Reverse microemulsions as nano-carriers of tea polyphenols retard oxidation of Eucommia ulmoides oliver seed oil.

Authors :
Zhu, Shiye
Zeng, Jianhua
Pan, Chen
Chai, Youzheng
Bai, Ma
Li, Jiaxing
Chen, Anwei
Source :
Colloids & Surfaces A: Physicochemical & Engineering Aspects. Aug2023, Vol. 671, pN.PAG-N.PAG. 1p.
Publication Year :
2023

Abstract

Eucommia ulmoides Oliver seed oil, rich in polyunsaturated fatty acids (PUFAs), is susceptible to lipid oxidation in foods. Tea polyphenols (TPs) may effectively retard lipid oxidation in non-polar systems according to the polar paradox theory. In this study, we constructed a TPs-loaded water-in oil (W/O) microemulsion, which is a transparent, spontaneously formed, and thermodynamically stable colloidal system. This system consisted of E. ulmoides oil (38%, w/w), Span80, Tween 80, 1,2 propanediol, water, and TPs (3%, w/w). TPs were encapsulated in water cores of microemulsion, endowing this system with the higher oxidative stability and radical scavenging abilities. The accelerated oxidation assay demonstrated that low-dose TPs (<0.5%, w/w) were more effective in retarding lipid oxidation than that of high-dose TPs. Within 56 d, the peroxide value of TPs-loaded microemulsion increased to 16.479 meq/kg oil at 65 ℃ and that of E. ulmoides oil exceeded the Food Safety standards value within only 45 d. These findings indicate that TPs encapsulated into microemulsion effectively inhibit PUFA-rich oil oxidation. The nano-scale W/O dispersed system favors the protection and practical application of natural water-soluble antioxidants in PUFAs-rich lipid foods. [Display omitted] • TPs- E. ulmoides oil microemulsion was designed to allow sufficient dispersion of a polar antioxidant. • The system has nano-sized reverse micelles and excellent physicochemical stability. • This system can efficiently retard lipid oxidation and scavenge free radicals. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09277757
Volume :
671
Database :
Academic Search Index
Journal :
Colloids & Surfaces A: Physicochemical & Engineering Aspects
Publication Type :
Academic Journal
Accession number :
163995327
Full Text :
https://doi.org/10.1016/j.colsurfa.2023.131687