Characterization of the flow of anisotropic colloidal particles using energy-dispersive X-ray diffraction
Rennie, A.R. and Bare, S. and Cockroft, J.K. and Jupe, A.C. (2006) Characterization of the flow of anisotropic colloidal particles using energy-dispersive X-ray diffraction. Journal of Colloid and Interface Science 293 (2), pp. 475-482. ISSN 0021-9797.
The technique of energy-dispersive X-ray diffraction to study the orientation of microscopic crystalline particles dispersed in a liquid has been described recently. This complements previous neutron diffraction studies by permitting measurements at higher spatial resolution. Work with synchrotron radiation and high-energy X-rays has allowed studies on liquid dispersions flowing in pipes with a thickness of about 1 cm and a spatial resolution of 100 μm. Kaolinite is often found as a dispersion of monocrystalline, microscopic plates. The crystallographic layer structure is commensurate with the particle shape: the 00l direction is normal to the plane of the plates. Measurements of diffraction of the flowing liquid dispersion in a pipe oriented in various directions to the incident beam can be used to deduce the average orientation and order parameters of the particles. The competing effects of alignment with walls and in flow fields were observed. Further work has measured the orientation near a bend in a pipe.
|Keyword(s) / Subject(s):||Kaolinite, flow alignment, pipe flow, x-ray diffraction|
|School:||Birkbeck Schools and Departments > School of Science > Biological Sciences|
|Date Deposited:||17 Aug 2011 14:39|
|Last Modified:||17 Apr 2013 12:21|
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