Open Access``Over the horizon`` SANS: Measurements on near-surface Poiseuille shear-induced ordering of dilute solutions of threadlike micelles
Author(s) -
William A. Hamilton,
Paul D. Butler,
John B. Hayter,
L. J. Magid,
P. J. Kreke
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/161537
Subject(s) - hagen–poiseuille equation , lubrication , shear (geology) , materials science , micelle , neutron scattering , drag , mechanics , scattering , small angle neutron scattering , drop (telecommunication) , pulmonary surfactant , quartz , optics , flow (mathematics) , chemistry , composite material , thermodynamics , physics , aqueous solution , telecommunications , computer science
Although the behavior of a fluid under shear near a surface can be expected to be critically important to its drag and lubrication properties, most shear measurements to date have been of the bulk. This paper outlines the use of a specially developed Poiseuille shear cell at grazing incidence to measure the small-angle neutron scattering (SANS) signal from the first few tens of microns in the interfacial region. The authors illustrate the technique with measurements made on the near-surface ordering in flow past a quartz surface of dilute surfactant solutions comprising highly extended self-assembling ``threadlike`` micelles