Edible oil-in-water emulsions stabilized by hydrophile–lipophile balanced sucrose ester

Hu, Xin; Binks, Bernard P.; Cui, Zhenggang

Abstract

Conventional emulsions are mostly stabilized by surfactants and for stabilization of oil-in-water emulsions the surfactants should be hydrophilic or with HLB numbers larger than seven. In this work, we report that edible oil-in-water emulsions can also be stabilized by surfactants with an HLB value close to seven. With edible sucrose ester C-1807 (HLB no. = 7) as emulsifier and three edible oils (canola oil, olive oil, soybean oil), edible oil-in-water emulsions can be stabilized by C-1807 at concentrations beyond its critical aggregation concentration (CAC). Although monomeric C-1807 behaves as an inferior emulsifier, they assemble to form multilamellar vesicles in water at concentrations higher than the CAC giving a viscoelastic/gel-like aqueous phase which is partly responsible for emulsion stabilization. Specifically, at 2 wt%, high internal phase emulsions (HIPEs) with ϕo = 0.75 can be obtained, which are stable against cooling–heating cycles between 5 and 30°C during storage. The vesicles disperse in the aqueous lamellae surrounding the oil droplets, which together with the viscoelastic/gel-like continuous phase prevents them from flocculation and coalescence.

Citation

Hu, X., Binks, B. P., & Cui, Z. (in press). Edible oil-in-water emulsions stabilized by hydrophile–lipophile balanced sucrose ester. Journal of the American Oil Chemists' Society, https://doi.org/10.1002/aocs.12698

• Journal Article Type: Article
• Acceptance Date: Mar 16, 2023
• Online Publication Date: Mar 29, 2023
• Deposit Date: Jun 5, 2023
• Publicly Available Date: Mar 30, 2024
• Journal: Journal of the American Oil Chemists' Society
• Print ISSN: 0003-021X
• Electronic ISSN: 1558-9331
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1002/aocs.12698
• Keywords: Edible oils; Emulsions; Vesicles; Viscoelastic solutions; Sucrose esters
• Public URL: https://hull-repository.worktribe.com/output/4267562