Modulation of soft glassy dynamics in aqueous suspensions of an anisotropic charged swelling clay through pH adjustment

Autor: Ahmed Abdala, Omar Bashir Wani, Mohammad Shoaib, Shaihroz Khan, Ali Seiphoori, Erin R. Bobicki
Rok vydání: 2021
Předmět:
Zdroj: Journal of colloid and interface science. 606(Pt 1)
ISSN: 1095-7103
Popis: Sodium-montmorillonite (Na-Mt) particles are geometrically anisometric that carry a pH dependent anisotropic surface charge. Therefore, it should be possible to manipulate the particle-particle interaction of colloidal range Na-Mt suspensions through pH changes which in turn should alter the soft glassy dynamics of Na-Mt suspensions.Rheological experiments were used to probe the impact of pH mediated colloidal particle-particle interaction on the physical aging, linear viscoelastic response, and yield stress behavior of Na-Mt suspension.The temporal evolution of the storage modulus (G') was stronger in the acid regime (pH 9.5) than the base (pH ≥ 9.5) pH regime. Horizontal shifting of the aging curves in the acid and base regimes led to aging time-H
Databáze: OpenAIRE