Hostname: page-component-848d4c4894-xfwgj Total loading time: 0 Render date: 2024-07-07T12:56:59.143Z Has data issue: false hasContentIssue false
  • English
  • Français

Adsorption of silane coupling agents onto kaolinite surfaces

Published online by Cambridge University Press:  09 July 2018

U. Johansson ,
A. Holmgren ,
W. Forsling  and
R. L. Frost
U. Johansson
Affiliation:
Department of Chemical and Metallurgical Engineering, Division of Inorganic Chemistry, Luleå University of Technology, SE-971 87 Luleå, Sweden
A. Holmgren
Affiliation:
Department of Chemical and Metallurgical Engineering, Division of Inorganic Chemistry, Luleå University of Technology, SE-971 87 Luleå, Sweden
W. Forsling
Affiliation:
Department of Chemical and Metallurgical Engineering, Division of Inorganic Chemistry, Luleå University of Technology, SE-971 87 Luleå, Sweden
R. L. Frost
Affiliation:
Centre for Instrumental and Developmental Chemistry, Queensland University of Technology, 2 George Street, Brisbane, GPO Box 2434, Queensland 4001, Australia
Get access Rights & Permissions [Opens in a new window]

Abstract

The adsorption of the silane coupling agents N-(2-amino-ethyl)-3-aminopropyl- trimethoxysilane (Z-6020), N-(2-(vinylbenzyl-amino)-ethyl)-3-amino-propyl-trimethoxysilane (Z-6032) and 3-glycidoxy-propyl-trimethoxysilane (Z-6040) onto the surface of kaolinite has been studied using the solvents water and ethanol. The adsorbed silanes were analysed using diffuse reflectance Fourier transform infrared (DRIFT) spectroscopy and FT-Raman spectroscopy. When the silane coupling agents are dissolved in water, silanol groups are formed. Raman spectra of aqueous solutions of the silanes show that condensation of the silanols into oligomers occurred. The peak at 1000 cm-1 assigned to Si–O–Si vibrations indicates that polymerization has occurred. A similar behaviour is observed when the silanes are dissolved in ethanol. The DRIFT spectra show that the silane coupling agents adsorb onto the surface of kaolinite. It is proposed that the oligomers are bonded to the kaolinite surface only by hydrogen bondings with no covalent bonds formed.

Type
Research Article
Information
Clay Minerals , Volume 34 , Issue 2 , June 1999 , pp. 239 - 246
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1999

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

Arkles, B. (1977) Tailoring surfaces with silanes. Chem. Tech. 7, 766–778.Google Scholar
Azzopardi, M.J. & Arribart, H. (1994) In situ FTIR study of the formation of an organosilane layer at the silica/solution interface. J. Adhesion, 46, 103–115.Google Scholar
Barbour, A.L. (1972) Silane modified clays. Rubber Age, November, 44-48.Google Scholar
Braggs, B., Fornasiero, D. Ralston, J. & Smart, R. St. (1994) The effect of surface modification by an organosilane on the electrochemical properties of kaolinite. Clays Clay Miner. 42, 123–136.Google Scholar
Dow Corning Corporation (1990) Ch. 1 Silane Coupling Agents. Google Scholar
Frost, R.L. & Van Der Gaast, S.J. (1997) Kaolinite hydroxyls — a Raman microscopy study. Clay Miner. 32, 293–306.Google Scholar
Grillo, T.A. (1971) Silane-modified kaolin pigments. Rubber Age, August, 37-42.Google Scholar
Henriksson, H. (1995) Ytkemisk karakterisering av pigmentslammor. MSc thesis, 015E, Luleá Univ. Technology, Sweden.Google Scholar
Ianicelli, J. (1991) Polymer reinforcement with amino and mercaptosilane grafted kaolin. Minerals Metall. Processing, 8, 135–138.Google Scholar
Manahan, S.E. (1993) Fundamentals of Environmental Chemistry, pp. 500-502. Lewis publishers.Google Scholar
Merck index (1996) The Merck Index 12th Edn. Merck Co. Inc., USA. P. 901.Google Scholar
Plueddeman, E.P. (1991) Silane Coupling Agents, 2nd Edition. Plenum Press, New York.CrossRefGoogle Scholar
Porro, T.J. & Pattacini, S.C. (1995) The use of diffuse reflectance FT-IR spectroscopy for the quantitative analysis of a number of silanized kaolin clays. Appl. Spectrosc. 44, 1170–1175.Google Scholar
Stumm, W. (1992) Chemistry of the Solid-Water Interface, pp. 61-65, 179–182. John Wiley & Sons Inc., New York & Chichester.Google Scholar