Effect of surfactants on the volume fraction change of colloidal suspensions during unidirectional drying process

Abstract

When a surfactant is added to a colloidal suspension, the shape of the particle precipitate after drying changes depending on the type of surfactant. In this study, a one-way drying model that simplifies the drying phenomenon was introduced for suspensions with CTAB. the volume fraction measurement method using the Lambert-Bael rule was applied to colloidal suspensions with CTAB to evaluate the transition of the solid-liquid layer boundary due to one-way drying. In unidirectional drying, CTAB did not affect the rate of transition of the solid-liquid layer.