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 |
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Rok vydání: | 2021 |
Předmět: |
Thixotropy
Materials science Viscosity Dynamic mechanical analysis Hydrogen-Ion Concentration Viscoelasticity Surfaces Coatings and Films Electronic Optical and Magnetic Materials Suspension (chemistry) Condensed Matter::Soft Condensed Matter Biomaterials Colloid Colloid and Surface Chemistry Rheology Chemical engineering Suspensions medicine Clay Surface charge Swelling medicine.symptom |
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 |
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