Synthesis, surface activities and aggregation properties of asymmetric Gemini surfactants

Autor:	Tao Yang, Yangchun Xie, Xiaohua He, Junjun Ma
Rok vydání:	2021
Předmět:	Surface tension Pulmonary surfactant Dynamic light scattering Chemistry Electrical resistivity and conductivity Transmission electron microscopy Vesicle General Physics and Astronomy Molecule Physical chemistry Membrane vesicle Physical and Theoretical Chemistry
Zdroj:	Physical Chemistry Chemical Physics. 23:27460-27467
ISSN:	1463-9084 1463-9076
Popis:	A series of Gemini surfactants with asymmetric structure (PKO 15-3(OH)-n; n = 12, 14 and 16) were synthesized through a simple two-step reaction including ring-opening reaction and quaternization reaction. The surface tension measurements indicated that the surface activities of PKO 15-3(OH)-n were higher than those of traditional single-chain and symmetrical Gemini surfactants. The thermodynamic parameters obtained from electrical conductivity measurements showed that the micellization processes of PKO 15-3(OH)-n were spontaneous and entropy-driven. Transmission electron microscopy and dynamic light scattering measurements confirmed that PKO 15-3(OH)-n molecules with a higher asymmetric degree could form vesicles, in which surfactant molecules were interdigitated side-by-side in the vesicle membrane. The obtained results are not in accordance with those calculated from the critical packing theory, which can further complement the theory.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfe4c35e845d6bdeaafdce8dc0159460 https://doi.org/10.1039/d1cp04216e Zobrazit plný text záznamu