Journal articles
Phase diagram of polydisperse Na-fluorohectoritewater suspensions: A synchrotron small-angle x-ray scattering study
Abstract : Systems of platelet-shaped nanostacks of the synthetic clay Na-fluorohectorite, suspended in saline solutions of various salt concentrations, exhibit a rich phase behavior with up to four phases coexisting in a single sample tube. They are studied here using small-angle x-ray scattering: the anisotropy of the obtained images is quantified, and, together with x-ray absorption measurements, this provides a precise determination of the phase boundaries, as well as a measure of the orientational ordering of the clay colloids in the various gel phases. The coexistence of different phases results from a sedimentation-induced vertical gradient in particle fraction. Quantitative relation of the vertical coordinate to the clay particle fraction in these samples allows determination of a phase diagram for these Na-fluorohectorite systems, as a function of the particle fraction and salt concentration.
https://hal-insu.archives-ouvertes.fr/insu-00381694
Contributor : Isabelle Dubigeon Connect in order to contact the contributor
Submitted on : Friday, March 11, 2022 - 10:28:02 AM
Last modification on : Friday, March 11, 2022 - 10:28:05 AM
Contributor : Isabelle Dubigeon Connect in order to contact the contributor
Submitted on : Friday, March 11, 2022 - 10:28:02 AM
Last modification on : Friday, March 11, 2022 - 10:28:05 AM
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