Influence of Surfactant Structure on the Drainage of Nonionic Surfactant Foam Films

Phase diagrams and microstructure of aggregates in mixed ionic surfactant/foam booster systems

“…The insertion of NMEA-12 should contribute to a decrease in the electrostatic repulsion between the head groups of SDS, hence decreasing the surface per molecule. On the other hand, an increase in hydrophobic interactions is expected in such a compact layer, which is considered a factor for increasing film stability in foams and improving properties of mixtures [21]. Negative interaction parameters, namely, attractive interactions between SDS and alkylethanolamides have been already reported [7].…”

Analysis of the Effects of Hydrocarbon Chain on Foam Properties of Alkyl Polyglycosides

“…Polyoxyethylene alkyl ether (n = 10, 12, 14, and 16) was studied by monitoring the dynamic surface tension and aqueous core thickness of a vertical foam film with FT-IR. Results showed that the foamability of polyoxyethylene alkyl ether decreases with increasing hydrophobicity or polarity of the surfactant molecule's end groups [16,17]. The rigid linking group favors static foam stability but decreases dynamic foam stability, whereas the soft linking groups enhance dynamic foam stability [10].…”

Influence of Hydrocarbon Chain Branching on Foam Properties of Olefin Sulfonate with FoamScan

“…Other researchers have investigated the influence of chain length of hydrophobic part of the surfactant on foam properties and found that the stability of foam is governed by a rather delicate balance between the respective roles of surface activity and adsorption kinetics [10][11][12]. Increasing the hydrophobicity or the polarity of the end groups of the surfactant molecules decreases their foamability [13,14]. Thus, to study the influence of hydrocarbon chain branching on foam properties is of great significance.…”