Comprehensive Analysis of Colloidal Behavior at the Water–Water Interface: From Assembly to Detachment
발표자
최서영 (서울과학기술대학교)
연구책임자
김규한 (서울과학기술대학교)
초록
내용
Aqueous two-phase systems (ATPS), formed by immiscible polymer-polymer or polymer-salt mixtures in water, have gained attention for their eco-friendly and biocompatible nature. This study investigates the dynamic behaviors of colloidal particles located at water–water interfaces, focusing on their clustering, structural evolution, and detachment under variable concentrations. By systematically analyzing the interplay of key forces—namely depletion attractions, capillary effects, van der Waals interactions, and electrostatic double-layer forces—we reveal how each contributes to particle assembly and detachment. Moreover, by tracking aggregate size evolution preceding detachment events, we introduce an image-based methodology for the indirect estimation of interfacial tension, and this approach accommodates diverse particle types. These findings deepen our understanding of interfacial colloidal dynamics and offer methodological tools applicable to soft matter research.