2015 Volume 13 Pages 301-306
Interfacial water among silica particles were measured on silica colloid suspensions (0–31.1 vol.%) by transmission infrared micro-spectroscopy. The difference absorption index k spectra from the pure water of silica colloid suspensions with varying volume fractions have residual components in the O–H stretching region: the 3060 cm-1 component increased linearly with the silica volume fraction, while the 3620 cm-1 component increased and the 3380 cm-1 component decreased with much less linearity. The 3060 and 3620 cm-1 components are considered to be characteristic to the surface silanol and interfacial water and affected by overlapping diffuse electrical double layers among silica particles. [DOI: 10.1380/ejssnt.2015.301]
