Oleofoams: The impact of formulating air-in-oil systems from a lipid oxidation perspective - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
Article Dans Une Revue Current Research in Food Science Année : 2024

Oleofoams: The impact of formulating air-in-oil systems from a lipid oxidation perspective

Résumé

Air-in-oil foams, or oleofoams, have a great potential for food applications as they can at least partially replace animal or hydrogenated fats, without compromising on textural properties. Yet, there are some challenges to tackle before they can largely be implementedfor real-life applications. One of those is the lack of data regarding their oxidative stability. This is an important point to consider, as although using oils rich in polyunsaturated fatty acids (PUFAs) is highly desirable from a nutritional perspective, these fatty acids are particularly prone to oxidation, which leads to major degradations of food quality. This work thus aimed to investigate the oxidative stability of oleofoams prepared with omega-3 PUFA-rich vegetable oils (rapeseed or flaxseed oil) and various types of high melting point lipid-based oleogelators (stearic acid, glyceryl monostearate and stearyl alcohol) when incubated at room temperature. The physical structure and stability of the oleofoams was monitored by various techniques (visual observations, microscopy, DSC, NMR, SAXS and WAXS). Lipid oxidation was assessed by combined measurements of primary (conjugated diene hydroperoxides) and secondary (thiobarbituric acid reactive substances – TBARS) products. We found that the oxidative stability of oleofoams was higher compared to that of the corresponding bulk oil. This protective effect was also found when the oil was simply mixed with the oleogelator without incorporation of air bubbles (i.e., forming an oleogel), and was somewhat modulated depending on the type of oleogelator.These results suggest that oleogelatorsand the structural changes that they induce limit the cascaded propagation of lipid oxidation in oil-continuous matrices, which is promising in the perspective of future applications.

Dates et versions

hal-04643757 , version 1 (10-07-2024)

Identifiants

Citer

Lucie Ribourg-Birault, Anne Meynier, Simon Vergé, Emeline Sallan, Alice Kermarrec, et al.. Oleofoams: The impact of formulating air-in-oil systems from a lipid oxidation perspective. Current Research in Food Science, 2024, 8, pp.100690. ⟨10.1016/j.crfs.2024.100690⟩. ⟨hal-04643757⟩
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