Effects of length and type of the alkyl chain on the micellization behavior of mixed systems of HS15 with fatty acids. (15th December 2022)

• Record Type: Journal Article
• Authors: Zhou, Yalin; Liu, Fulin; Liu, Lingbo; Qiu, Xiangdian; Ye, Mengting; Pan, Hongchun; Liu, Hong
• Is Part Of: Food chemistry. Volume 397(2022)
• Publication Date: 2022-12-15
• Subjects: Short-chain fatty acids -- Medium-chain fatty acids -- HS15 -- Critical micelle concentration -- Micellization behavior -- Thermodynamic stability; HS15 Polyoxyl 15 Hydroxystearate -- SCFAs short-chain fatty acids -- MCFAs medium-chain fatty acids -- CMC critical micelle concentration -- CP cloud point -- EBA 2-ethylbutyric acid -- HxA hexanoic acid -- VPA valproic acid -- OtA octanoic acid -- EOA 4-ethyloctanoic acid -- DcA decanoic acid -- ΠCMC surface tension reduction performance -- Γmax maximum surface excess concentration -- Amin minimum adsorption area -- ΔGm standard Gibbs free energy change of micellization -- ΔGads standard Gibbs free energy change of adsorption -- Gmin equilibrium surface free energy -- DLS dynamic light scattering -- γ surface tension -- dη particle size -- PDI polydispersity index -- BODIPY 4, 4′-difluoro-4-bora-3a, 4a-diaza-s-indacene -- ACQ aggregation caused quenching; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2022.133830
• Languages: English
• ISSNs: 0308-8146

Abstract

Graphical abstract: Highlights: The stability of micelle is affected by the structure of fatty acids. It is more difficult for acids with longer-chain to form stable micelles. Micelles formed by branched acids have higher stability. Abstract: Due to volatility, low solubility and instability, the application of SCFAs and MCFAs is limited, which is expected to be solved by micelles. Taking SCFAs and MCFAs as models, this paper aims to research the influences of alkyl chain length and type on HS15 micelles. The critical micelle concentration (CMC) of various acid-HS15 systems was determined firstly. Then some air–water interface parameters and thermodynamic parameters were analyzed. Subsequently, particle size, cloud points (CP) and fluorophore release curves were measured. With the increase of CMC and Gmin, the decrease of size and CP, and the rapid quenching of fluorophores, it is more difficult for acids with longer-chain to form stable micelles with HS15 because of the strength of iceberg structure. Showing smaller CMC and Gmin, smaller size, higher CP and slower release of fluorescers, branched molecules can bind more closely to the hydrophobic part of HS15 due to their spatial flexibility.