The present work deals with an interpretation of the differences in micellar structure of two surfactants, sodium decyl sulfonate and sodium decyl sulfate, whose only difference in molecular structure is the presence, for sulfate, of an oxygen atom bridging alkyl chains from a common SO 3 charged head group. Using a simple geometrical approach, a different exposure of the surfactant head groups on the micellar surface is proposed. It is also shown that the different interphase microstructure could be the reason that decyl sulfate forms ellipsoidal aggregates, in contrast to decyl sulfonate, which forms nearly spherical micelles.
Evaluation of alkyl sulfate and sulfonate micellar structure at the water-surfactant interphase with simple geometrical calculations / DEL RE, Giuseppe; D'Errico, Gerardino; Ortona, ORNELLA GIUSTINA; Vitagliano, Vincenzo. - In: JOURNAL OF COLLOID AND INTERFACE SCIENCE. - ISSN 0021-9797. - ELETTRONICO. - 349:(2010), pp. 230-235. [10.1016/j.jcis.2010.05.023]
Evaluation of alkyl sulfate and sulfonate micellar structure at the water-surfactant interphase with simple geometrical calculations
DEL RE, GIUSEPPE;D'ERRICO, GERARDINO;ORTONA, ORNELLA GIUSTINA;VITAGLIANO, VINCENZO
2010
Abstract
The present work deals with an interpretation of the differences in micellar structure of two surfactants, sodium decyl sulfonate and sodium decyl sulfate, whose only difference in molecular structure is the presence, for sulfate, of an oxygen atom bridging alkyl chains from a common SO 3 charged head group. Using a simple geometrical approach, a different exposure of the surfactant head groups on the micellar surface is proposed. It is also shown that the different interphase microstructure could be the reason that decyl sulfate forms ellipsoidal aggregates, in contrast to decyl sulfonate, which forms nearly spherical micelles.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.