Author: Shewring N.I.E. Jones T.G.J. Maitland G. Yarwood J.
Publisher: Academic Press
ISSN: 0021-9797
Source: Journal of Colloid and Interface Science, Vol.176, Iss.2, 1995-12, pp. : 308-317
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
Hydration processes at the bentonite surface have been investigated using Fourier transform infrared transmission and attenuated total reflection (ATR) spectroscopic techniques. Significant differences in the silicate nu(Si-O) stretching region (1150 to 950 cm -1 ) have been consistently observed between the spectra of bentonite powder with its natural water content and the spectra of bentonite freshly deposited on a substrate by evaporating the water from an aqueous bentonite suspension. The origin of these differences (and in particular the appearance of two "new" bands at 1086 and 1018 cm -1 ) is discussed in terms of variations in the silicate structure as a function of the variation of electrical double layer properties. Differences of interfacial distances which result from the variations in interplatelet repulsion are thought to be responsible for the spectral changes and this idea is supported by spectral correlations with variations of exchangeable cation and ionic strength of the aqueous environment of the dispersed bentonite.
Related content
By Băkdilescu Simona Sandorfy Camille
Applied Spectroscopy, Vol. 40, Iss. 8, 1986-11 ,pp. :
By Bădilescu Simona Sandorfy Cmille
Applied Spectroscopy, Vol. 41, Iss. 1, 1987-01 ,pp. :
By Gardella Joseph A. Eyring Edward M. Klein Joseph C. Carvalho Manuel B.
Applied Spectroscopy, Vol. 36, Iss. 5, 1982-09 ,pp. :