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Methods for the Self-integration of Megamolecular Biopolymers on the Drying Air-LC Interface
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Dynamic interfacial properties and foam behavior of licorice root extract solutions
Hashem Ahmadi Tighchi1, Mohammad Hasan Kayhani1, Ali Faezian2
1Faculty of Mechanical Engineering, Shahrood University of Technology, Shahrood, Iran.
Colloids and Surfaces. B, Biointerfaces
|February 23, 2023
Summary
Licorice root extract (LRE) acts as a natural surfactant, reducing surface tension and improving foam stability. This study explores its potential for commercial foam applications.
Area of Science:
- Natural product chemistry
- Surface science
- Colloid and interface science
Background:
- Licorice (Glycyrrhiza glabra) root extract (LRE) is rich in saponins, suggesting potential as a natural surfactant.
- Understanding the interfacial and foam properties of LRE is crucial for its application in commercial products.
Purpose of the Study:
- To investigate the dynamic surface tension and foam behavior of aqueous LRE solutions.
- To evaluate LRE as a potential biosurfactant for foam-related applications.
Main Methods:
- Pendant drop shape analysis was used to study surface tension and dilational surface rheology.
- Bikerman type experiments measured foamability and foam stability.
- Equilibrium surface tension and critical aggregation concentration (CAC) were determined.
Main Results:
- LRE significantly reduces surface tension by 25 mN/m at its CAC, indicating surface-active components.
- Surface dilational visco-elasticity measurements showed predominantly elastic adsorption layers.
- Foamability and foam stability correlated positively with dynamic surface properties.
Conclusions:
- Licorice root extract exhibits effective biosurfactant properties.
- The elastic nature of LRE adsorption layers contributes to foam stability.
- LRE shows promise for utilization in commercial foam applications.
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