Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-26T07:45:55.547Z Has data issue: false hasContentIssue false
  • English
  • Français

The Adsorption of Poly(Ethylene Glycols) on Clay Minerals

Published online by Cambridge University Press:  09 July 2018

R. L. Parfitt  and
D. J. Greenland
R. L. Parfitt
Affiliation:
Department of Agricultural Biochemistry and Soil Science, Waite Agricultural Research Institute, University of Adelaide
D. J. Greenland
Affiliation:
Department of Agricultural Biochemistry and Soil Science, Waite Agricultural Research Institute, University of Adelaide
Get access Rights & Permissions [Opens in a new window]

Abstract

Poly(ethylene glycols) of molecular weights 200 to 20000 were strongly adsorbed on montmorillonite from aqueous solution. Free energies of adsorption calculated from the adsorption isotherms became more negative with increase in molecular weight and the entropy change became increasingly positive, probably due to a net desorption of water from the clay surface as the organic compound was adsorbed. The adsorption of the higher molecular weight polymers caused an increase in the interlamellar separation. The effect of the exchangeable cation on the adsorption followed the order Cs > Na > Ca > Al, indicating that the cation retained its hydration shell and did not form a direct association with the adsorbed organic molecules. Some evidence was obtained that 'water bridges' were formed between exchangeable calcium an aluminium ions and the ether groups of the polymers.

Type
Research Article
Information
Clay Minerals , Volume 8 , Issue 3 , July 1970 , pp. 305 - 315
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1970

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bailey, F.E. & Callard, R.W. (1959). J. appL Polym. Sci. 1, 56.Google Scholar
Brindley, G.W. & Rustom, M. (1958). Am. Miner. 43, 627.Google Scholar
Emerson, W.W. & Raupach, M. (1964). Aust. J. Soil Res. 2, 46.CrossRefGoogle Scholar
Everett, D.H. (1965). Trans. Faraday Soc. 61, 2478.Google Scholar
Giles, C.H., Macewan, T.H., Nakhwa, S.N. & Smith, D. (1960). J. chem. Soc. (Lond.) 1960, 3973.Google Scholar
Greenland, D.J. (1963). J. Colloid Sci. 18, 647.Google Scholar
Greenland, D.J. (1965). Soils Fertil. 28, 415.Google Scholar
Greenland, D.J., Laby, R.H. & Quirk, J.P. (1965). Trans. Faraday Soc. 61, 2024.CrossRefGoogle Scholar
Greenland, D.J. & Quirk, J.P. (1964). J. Soil Sci. 15, 178.Google Scholar
Hammes, G.G. & Scnimmel, P.R. (1967). J. Am. Chem. Soc. 89, 442.CrossRefGoogle Scholar
Hoeeman, R.W. & Brindley, G.W. (1960). Geochim. cosmochim. Acta, 20, 15.Google Scholar
Kijne, J. (1968). Trans. 9th int. Congr. Soil Sci., Adelaide, 1, 597.Google Scholar
Koral, J., Ulman, R. & Eirich, F.R. (1958). J. Phys. Chem. 62, 541.Google Scholar
Malcolm, G.N. & Rowlinson, J.S. (1957). Trans. Faraday Soc. 53, 921.Google Scholar
Scnlck, M.L. (1967). Nonionic Surfactants, Dekker, M., New York.Google Scholar
Scrtotr, H. (1964). Kolloid Z. 199, 158.Google Scholar
Silberberg, A. (1962). J. phys. Chem. 66, 1884.Google Scholar