Stable sunflower oil oleogel from oil/water pickering emulsion with regenerated chitin. (July 2021)

• Record Type: Journal Article
• Authors: Baraki, Senay Yacob; Jiang, Yang; Li, Xiang; Debeli, Dereje Kebebew; Wang, Bija; Feng, Xueling; Mao, Zhiping; Sui, Xiaofeng
• Is Part Of: Lebensmittel-Wissenschaft + Technologie =. Volume 146(2021)
• Publication Date: 2021-07
• Subjects: Oleogel -- Sunflower oil -- Pickering emulsion -- Regenerated chitin; Food industry and trade -- Periodicals; Food -- Composition -- Periodicals; Microbiology -- Periodicals; Nutrition -- Periodicals; 664.005
• DOI: 10.1016/j.lwt.2021.111483
• Languages: English
• ISSNs: 0023-6438

Abstract

Abstract: Pickering emulsion templating is a versatile technique in formulating highly networked oil-in-water emulsions applicable in foods, cosmetics, and pharmaceuticals areas. In this work, oleogels was prepared by oil-in-water Pickering emulsions using regenerated chitin (RCh) as the stabilizing particles. The effects of RCh concentrations (0.4/100–1.4 g/100 g) on the formation, rheology, and log-term stability of the emulsions and oleogles were investigated. It was found that the solid-like oloegel with a high concentration of liquid oil ( ≥ 98 g/100 g) could be obtained after evaporating of water from the emulsions. Shear-thinning behavior was observed at lower concentrations of RCh (0.4–0.6 g/100 g) and higher frequencies in the emulsions. An increase in the viscoelastic property was achieved. Oleogels containing higher concentrations of RCh (0.8/100–1.4 g/100 g) showed excellent resistance against coalescence and Ostwald ripening during the storage time. These oleogels also showed good thermal stability (no sign of oil leakages) when heated to 80 °C for 2 days. This emulsion templating approach is a feasible oil structuring strategy promising to be used in various applications. Graphical abstract: Image 1 Highlights: Oleogel was prepared via Pickering emulsion stabilized by regenerated chitin (RCh). The oleogel contains up to 98 wt% sunflower oil. RCh formed a strong network and effectively bind the oils. Oloegel showed higher gel strength (G'>10 5 Pa) and excellent structural stability.