Adsorption and Association in Aqueous Solutions of Dissymmetric Gemini Surfactant

Effect of the spacer length on the association and adsorption behavior of dissymmetric gemini surfactants

“…Electron micrographs of 12-2-14 show the coexistence of long branched threadlike, shorter but still elongated, and spheroidal micelles. These results are in very good agreement with light scattering measurements showing the coexistence of several different populations [20]. Recently, the evidence for a multimodal population of aggregates was confirmed by different scattering techniques [45].…”

“…Recently, we showed that surface properties and thermodynamic parameters of 12-2-14 lie between those obtained for its symmetric counterparts (12-2-12 and 14-2-14); however, some phenomena in the micellar phase were observed to be different [20]. In this article, we extend our investigation to the influence of spacer length on the adsorption and association behavior of 12-s-14 surfactants in aqueous solutions.…”

Synthesis and aqueous solution properties of homologous gemini surfactants with different head groups

“…However, new classes of gemini surfactants have emerged and have attractive attention: dissymmetric gemini surfactants with hydrocarbon chains of different length and with two identical head groups [21][22][23][24][25][26][27][28] and asymmetric ones with two identical hydrocarbon chains and two different hydrophilic head groups [29][30][31][32][33][34]. The research on asymmetric gemini surfactant was less documented.…”

Synthesis, Characterization and Surface‐Activity of a Polyoxyethylene Ether Trimeric Quaternary Ammonium Surfactant

“…When compared to the conventional monomeric (single chain) quaternary ammonium salt, the corresponding gemini surfactants consisting of two single-chain ionic surfactants linked by a spacer at head level exhibit a higher surface activity, and are widely used as an effective emulsifier, bactericidal agents, dispersants and anti-foaming agents [4][5][6]. The outstanding properties of gemini surfactants have motivated researchers to synthesize multimeric cationic surfactants of the quaternary ammonium salt type, e.g.…”