Switchable hydrophilicity solvent/water emulsion-based extraction of polyphenols from grape skin

IF 2.7 3区生物学 Q2 PLANT SCIENCES South African Journal of Botany Pub Date : 2025-02-01 DOI:10.1016/j.sajb.2024.11.018

Lijin Zhang, Junjie Wang

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Abstract

In this present study, switchable hydrophilicity solvent (SHS) was dispersed into water to induce the SHS/water emulsion for the ultrasound-assisted extraction (UAE) and enrichment of polyphenols from grape skin. The single factor experiment design, orthogonal experiment design and Response Surface Methodology (RSM) coupled with Box-Behnken Design (BBD) were successively applied to optimize the extraction. The optimal extraction conditions were as follows: SHS of N,N-Dimethylcyclohexylamine (DMCHA), DMCHA/water volume ratio of 1:1, liquid-solid ratio of 20 mL/g, ultrasound time of 24.93 min, CO₂ bubbling time of 120 min and CO₂ bubbling rate of 0.25 L/min. Compared to the ethanol-based UAE, the optimal DMCHA/water emulsion-based UAE not only gave a higher extraction yield (14.07%, 49.84% enhanced), but also exhibited the content differences of mono-phenols. Furthermore, the DMCHA/water emulsion-based UAE showed stronger antioxidant activity than that of the ethanol-based UAE. In addition to the low economic cost, low reagent residues and high DMCHA recovery, this proposed extraction method has been proved to be a promising alternative for industrial extraction.

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来源期刊

South African Journal of Botany 生物-植物科学

CiteScore

5.20

自引率

9.70%

发文量

709

审稿时长

61 days

期刊介绍： The South African Journal of Botany publishes original papers that deal with the classification, biodiversity, morphology, physiology, molecular biology, ecology, biotechnology, ethnobotany and other botanically related aspects of species that are of importance to southern Africa. Manuscripts dealing with significant new findings on other species of the world and general botanical principles will also be considered and are encouraged.