✦ LIBER ✦

Adsorbed behavior of spin-labeled silane coupling agent on colloidal silica studied by electron spin resonance

✍ Scribed by Nishiyama, Norihiro ;Katsuki, Hirokazu ;Horie, Kozo ;Asakura, Tetsuo

Publisher: John Wiley and Sons
Year: 1987
Tongue: English
Weight: 460 KB
Volume: 21
Category: Article
ISSN: 0021-9304
DOI: 10.1002/jbm.820210809

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✦ Synopsis

The adsorption mechanism of silane coupling agent on the colloidal silica surface is studied with spin-labeled silane coupling agent using ESR method. The density of the adsorbed silane molecules was determined to be approximately 1.5-2 molecules per 100 A of the silica surface in 95% ethanol solution. In addition, ESR signal of spin-labeled agent adsorbed on the colloidal silica surface was composed of two components; slow component attributable to the agents adsorbed directly on the Si-OH groups of the silica surface through hydrogen bond formation and rapid one attributable to the agents interacted with such adsorbed silane molecules.

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