The differential adsorption of silanes from solution onto model E-glass surfaces using high resolution XPS

F.R. Jones, J.L. Thomason, X.M. Liu

Research output: Chapter in Book/Report/Conference proceedingChapter

47 Citations (Scopus)
110 Downloads (Pure)

Abstract

γ-aminopropyltriethoxysilane (APS), γ-mercaptopropyltrimethoxysilane (MPS) and their mixture have been adsorbed onto acid-treated model E-glass fibres from aqueous solution with different concentrations. High resolution X-ray photoelectron spectroscopy (XPS) has been employed to characterize APS and MPS single silane coatings and the selective adsorption of APS/MPS mixed silane coating. It is found that the Si contribution from the silane can be distinguished from the Si contribution from the acid-treated E-glass fibres by fitting Si2p1/2 and Si2p3/2 peaks with components for CSiO3 and SiO4 environments. The adsorption isotherms of APS and MPS have been obtained by comparing the atomic concentrations of N, S and CSiO3 groups. APS and MPS are equally adsorbed from 0.1% APS/MPS mixed silane solution, however, MPS dominates the deposit on model E-glass fibres to a depth corresponding to the take-off-angle of 45º when it is adsorbed from 0.5% and 1.0% APS/MPS mixed silane solutions.
Original languageEnglish
Title of host publicationSilanes and Other Coupling Agents
Pages29-37
Number of pages9
Volume4
Publication statusPublished - Apr 2007

Keywords

  • E-glass fibres
  • model E-glass surfaces
  • silanes
  • coatings
  • adsorption
  • XPS

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