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Systematic Study of Counterion Effects and NaCl-Induced Modulation of Foam Performance in Lauroyl Glutamate Surfactants

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Publicado en:Colloids and Interfaces vol. 9, no. 6 (2025), p. 82-99
Autor principal: Cao Tianyu
Otros Autores: Fu, Han
Publicado:
MDPI AG
Materias:
Beijing China
China
Aqueous solutions
Surfactants
Chloride
Electrodes
Sodium
Adsorption
Sodium chloride
Amino acids
Sodium salts
Stability
Chemical industry
Potassium
Interfacial properties
Potash
Caustic soda
Micelles
Foaming
Acceso en línea:Citation/Abstract
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Resumen:This study systematically compares how three counterions (Na+, K+, NH4+) regulate the interfacial properties, foaming behavior, and foam stability of lauroyl glutamate (LG) surfactants, and further examines how added NaCl modifies these properties in the sodium salt (SLG). The three counterions induce only slight variations in surface activity and foam generation. Their influence is more evident in foam stability, with the sodium salt exhibiting enhanced stability across a wider concentration range. For SLG, NaCl addition markedly lowers the critical micelle concentration and induces concentration-dependent changes in foaming behavior: 1% NaCl enhances foam generation, while higher salt levels diminish this effect. Foam stability is strongly affected in the sub-cmc regime, with 3% NaCl producing the most stable foams. Surfactant concentration and salt content are the main factors affecting foam performance.
ISSN:2504-5377
DOI:10.3390/colloids9060082
Fuente:Materials Science Database