The structure of aqueous solutions of a non-ionic amphiphile, C12H25 (OCH2CH2)8OH, was studied by neutron scattering measurements along an isothermal path crossing the isotropic single-phase region from 0% to 100% amphiphile volume fraction. The aim of the experiment is to investigate the evolution from a micellar structure at low amphiphile volume fraction φ to an amphiphile-continuous structure at high φ. The scattered intensity shows a peak in the range 0.27<φ<0.86. The analogy with the transition from water-in-oil to oil-in-water microemulsions suggests that at intermediate values of φ the structure is bicontinuous.
Neutron Scattering Investigation of Isotropic Solutions of Nonionic Amphiphiles at High Concentration / V.Degiorgio, M.Corti, L.Cantu'. - In: CHEMICAL PHYSICS LETTERS. - ISSN 0009-2614. - 151:4-5(1988), pp. 349-353.
Neutron Scattering Investigation of Isotropic Solutions of Nonionic Amphiphiles at High Concentration
L.Cantu'Ultimo
1988
Abstract
The structure of aqueous solutions of a non-ionic amphiphile, C12H25 (OCH2CH2)8OH, was studied by neutron scattering measurements along an isothermal path crossing the isotropic single-phase region from 0% to 100% amphiphile volume fraction. The aim of the experiment is to investigate the evolution from a micellar structure at low amphiphile volume fraction φ to an amphiphile-continuous structure at high φ. The scattered intensity shows a peak in the range 0.27<φ<0.86. The analogy with the transition from water-in-oil to oil-in-water microemulsions suggests that at intermediate values of φ the structure is bicontinuous.
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