Faculty of Mechanical Engineering, Shahrood University of Technology, Shahrood, Iran.
Faculty of Mechanical Engineering, Shahrood University of Technology, Shahrood, Iran.
Colloids Surf B Biointerfaces. 2023 Apr;224:113181. doi: 10.1016/j.colsurfb.2023.113181. Epub 2023 Jan 30.
Licorice (Glycyrrhiza glabra) is a useful plant of the family Fabaceae, with sweet-tasting roots. The root extract of this plant is rich in saponins, so it can be considered a source of natural surfactants. This research provides some applicable information about the dynamic surface tension and foam behavior of aqueous solutions of licorice root extract (LRE). The pendant drop shape analysis was utilized to study the surface tension and dilational surface rheology of LRE at the water/air interface. The Bikerman type experiment was used to measure foamability and foam stability of aqueous LRE solutions. The equilibrium surface tensions reveal that the LRE contains surface-active components and is capable of reducing the surface tension by 25 mN/m at the critical aggregation concentration (CAC). The surface dilational visco-elasticity measurements proved that the adsorption layers are predominantly of elastic nature. Also the foamability and foam stability show a meaningful correlation with the dynamic surface properties. This study aims to contribute to the development of appropriate utilization of the benefits provided by a biosurfactant source in foam-related commercial applications.
甘草（Glycyrrhiza glabra）是豆科植物中一种有用的植物，其根部具有甜味。这种植物的根提取物富含皂甙，因此可以被认为是天然表面活性剂的来源。本研究提供了一些关于甘草根提取物（LRE）水溶液的动态表面张力和泡沫行为的实用信息。悬滴形状分析用于研究 LRE 在水/气界面上的表面张力和拉伸表面流变学。Bikerman 型实验用于测量 LRE 水溶液的起泡性和泡沫稳定性。平衡表面张力表明，LRE 含有表面活性成分，能够在临界聚集浓度（CAC）下将表面张力降低 25 mN/m。表面拉伸粘弹性测量证明，吸附层主要具有弹性性质。此外，起泡性和泡沫稳定性与动态表面性能之间存在显著相关性。本研究旨在为在与泡沫相关的商业应用中适当利用生物表面活性剂源提供的益处做出贡献。
