Accession Number:

ADA123020

Title:

Diffuse Reflectance Fourier Transform Infrared Spectroscopic Study of Chemical Bonding and Hydrothermal Stability of an Amino Silane on Metal Oxide Surfaces.

Descriptive Note:

Technical rept.,

Corporate Author:

CASE WESTERN RESERVE UNIV CLEVELAND OH DEPT OF MACROMOLECULAR SCIENCE

Report Date:

1982-12-01

Pagination or Media Count:

42.0

Abstract:

Fourier transform infrared spectroscopy is used to study the metal oxidesilane interface. Structures of gamma-aminopropyldimethylethoxysilane gamma-APDMES coupling agent on the surface of metal oxide powders are proposed. The structure depends on the surface characteristics of the substrate. The amine group of the silane molecule forms a hydrogen bond with the silica surface. The enhanced intensity of the amine band around 171600 C indicates that amine group forms a complex on the titanium and aluminum oxide surfaces as well as hydrogen bond. By using the diffuse reflectance infrared technique, the Al-O-Si and Ti-O-Si antisymmetric frequencies are detected at 963 and 1950 cm, respectively, which agree favorably with the calculated frequencies. When the treated metal oxide powders are immersed in 80 degrees C water, the desorption of silance is more rapid when aluminum powder, rather than titanium powder, is the substrate. Silica powder, however, forms a more hydrophobic surface. The rate of silane desorption decreased in the order of aluminum oxide, titanium oxide, and silicon oxide. Author

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE