The microstructure of di-alkyl chain cationic/nonionic surfactant mixtures: Observation of coexisting lamellar and micellar phases and depletion induced phase separation

Article Abstract:

The evolution of microstructure and composition occurring in aqueous solutions of di-alkyl chain cationic/nonionic surfactant mixtures is studied using small angle neutron scattering, SANS, is studied. Result shows that the phase separation that occurs in mixed systems is induced by a depletion force arising from micellar component, and that the size and volume fraction of micelles are critical factors.

Science & research, Research, Aqueous solution reactions, Alkyl groups

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Elongational flow induced ordering in surfactant micelles and mesophases

Article Abstract:

Small angle neutron scattering, SANS is used to investigate the elongational flow induced ordering in surfactant micelles and mesophases. Spatially resolved SANS measurements are used to determine the distribution of orientational ordering over the flow velocity pattern in an elongational flow cell and comparison with the effects of shear flow are made.

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Flow-induced effects in mixed surfactant mesophases

Article Abstract:

Spatially resolved small-angle neutron scattering [SANS] was used to investigate the flow-induced effects in mixed surfactant mesophases. It was found that the two different surfactant mixtures have different relative amounts of lamellar and micellar components which results in some differences in the flow-induced response.

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