Anisotropic character of talc surfaces as revealed by streaming potential measurements, atomic force microscopy, molecular dynamics simulations and contact angle measurements

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Publication Type Journal Article
School or College College of Mines & Earth Sciences
Department Metallurgical Engineering
Creator Miller, Jan D.
Other Author Nalaskowski, J., Abdul, B., Du, H.
Title Anisotropic character of talc surfaces as revealed by streaming potential measurements, atomic force microscopy, molecular dynamics simulations and contact angle measurements
Date 2007
Description A study of the interfacial properties of the basal plane and the edge surfaces of talc is described in this paper. The isoelectric points measured at two different crystallographic surfaces by the streaming potential method were found to be similar and exist at about pH 3.0. In the case of the edge surface, the zeta potential increases at higher pH values which can be attributed to the hydration of surface magnesium ions. The forces between the edge of a 20 urn talc particle and the two different crystallographic surfaces of talc were measured at various pH values using atomic force microscopy (AFM). These measurements show differences between the properties of the basal plane and edge of the talc. Finally, the differences in the hydration of the basal plane and the edge of talc are revealed from molecular dynamics (MD) simulations. The basal plane of talc is much less hydrated than the edge as can be seen from the water density distribution functions which correlate quite well with the contact angle measurements at the basal plane surface and the edge surface. Improved quality of the edge surface was achieved by sandblasting (erosion with alumina) and research regarding the characteristics of this edge surface is in progress.
Type Text
Publisher Canadian Metallurgical Quarterly
Volume 46
Issue 3
First Page 227
Last Page 235
Subject Talc; Interfacial properties; Hydration; Atomic force microscopy; Molecular dynamics simulations; Edge surface; Basal plane
Subject LCSH Talc; Surface chemistry
Language eng
Bibliographic Citation Nalaskowski, J., Abdul, B., Du, H. & Miller, J.D. (2007). Anisotropic character of talc surfaces as revealed by streaming potential measurements, atomic force microscopy, molecular dynamics simulations and contact angle measurements, Canadian Metallurgical Quarterly, 46 (3), 227-235.
Rights Management (c) Canadian Metallurgical Quarterly
Format Medium application/pdf
Format Extent 5,383,839 Bytes
Identifier ir-main,4591
ARK ark:/87278/s6zw243x
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 703612
Reference URL https://collections.lib.utah.edu/ark:/87278/s6zw243x
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