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 Epub Date: 2024-12-03 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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可切换亲水性溶剂/水乳化法从葡萄皮中提取多酚

本研究将可切换亲水性溶剂（SHS）分散到水中，诱导SHS/水乳液用于超声辅助提取和富集葡萄皮中的多酚。分别采用单因素试验设计、正交试验设计和响应面法（RSM）结合Box-Behnken设计（BBD）对提取工艺进行优化。最佳提取条件为：N，N-二甲基环己胺（DMCHA）的SHS， DMCHA/水体积比为1:1，液固比为20 mL/g，超声时间24.93 min， CO2鼓泡时间120 min， CO2鼓泡速率0.25 L/min。与乙醇基UAE相比，最佳DMCHA/水乳化UAE不仅提取率提高了14.07%，提高了49.84%，而且单酚类物质含量也有所差异。此外，DMCHA/水乳化型UAE具有较强的抗氧化活性。该方法经济成本低，试剂残留少，DMCHA回收率高，是一种很有前途的工业提取方法。

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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.