Effect of polyphenolic structure and mass ratio on the emulsifying performance and stability of emulsions stabilized by polyphenol-corn amylose complexes

• Published in: Ultrasonics sonochemistry Vol. 95; p. 106367
• Main Authors: Xie, Huan, Wei, Xianling, Liu, Xiaoyan, Bai, Weidong, Zeng, Xiaofang
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.05.2023; Elsevier
• Subjects: Amylose; Emulsifying properties; Emulsion stability; Original; Polyphenolic structure; Polyphenols; Polyphenols; Polyphenolic structure; Amylose; Emulsion stability; Emulsifying properties
• ISSN: 1350-4177; 1873-2828
• DOI: 10.1016/j.ultsonch.2023.106367

[Display omitted] •Hydrophobicity, emulsifying ability of AM was improved by complexing with polyphenol.•Emulsifying ability of polyphenols/AM complexes was regulated by polyphenol/AM ratio.•Emulsifying ability of complexes was also regulated by polyphenolic structure.•The Rt decreased with increasing of pyrogallol group number on molecular (TA < EGCG).•TA/AM complexes had best hydrophobicity, emulsifying property, emulsion stability. O/W emulsions stabilized by polyphenol/amylose (AM) complexes with several polyphenol/AM mass ratios and different polyphenols (gallic acid (GA), epigallocatechin gallate (EGCG) and tannic acid (TA)) were prepared by a high-intensity ultrasound emulsification technique. The effect of the pyrogallol group number of polyphenols and the mass ratio of polyphenols/AM on polyphenol/AM complexes and emulsions was studied. The soluble and/or insoluble complexes gradually formed upon adding polyphenols into the AM system. However, insoluble complexes were not formed in the GA/AM systems because GA has only one pyrogallol group. In addition, the hydrophobicity of AM could also be improved by forming polyphenol/AM complexes. The emulsion size decreased with increasing pyrogallol group number on the polyphenol molecules at a fixed ratio, and the size could also be controlled by the polyphenol/AM ratio. Moreover, all emulsions presented various degrees of creaming, which was restrained by decreasing emulsion size or the formation of a thick complex network. The complex network was enhanced by increasing the ratio or pyrogallol group number on the polyphenol molecules, which was because the increasing number of complexes was adsorbed onto the interface. Altogether, compared to GA/AM and EGCG/AM, the TA/AM complex emulsifier had the best hydrophobicity and emulsifying properties, and the TA/AM emulsion had the best emulsion stability.