Interfacial and Rheological Characteristics of Maghemite Aqueous Suspensions

摘要: The interfacial properties and rheological behavior of the maghemite/water system have been investigated in this work. It has determined that real pzc iep values maghemite immersed aqueous solution, containing KNO3 as electrolyte, are very close to 6.6. also shown triple-layer site-binding model likely describes electrical double layer system. parameters obtained from indicate mechanism responsible for charging involves complexation reactions suspensions similar those magnetite. Finally, characterization three samples with different average particle size showed maximum yield stress, at a fixed solid concentration, decreases sample decreases. This anomalous is originated by apparition relaxation superparamagnetic phenomena consequence decrease size. Copyright 1998 Academic Press.