Adsorbed behavior of spin-labeled silane coupling agent on colloidal silica studied by electron spin resonance.
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 A2 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.
Nishiyama
N
N
Department of Dental Materials, Nihon University School of Dentistry at Matsudo, Chiba, Japan.
Katsuki
H
H
Horie
K
K
Asakura
T
T
D000180:Acrylic Resins; D000327:Adsorption; D003102:Colloids; D003188:Composite Resins; D004578:Electron Spin Resonance Spectroscopy; D012821:Silanes; D012825:Silicon; D012822:Silicon Dioxide; D013113:Spin Labels; D013997:Time Factors
D000180:Acrylic Resins; D003102:Colloids; D003188:Composite Resins; D012821:Silanes; D013113:Spin Labels; D012822:Silicon Dioxide; D012825:Silicon