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Rheological Studies on Stabilised Zirconia Aqueous Suspensions

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The rheological characterisation of the aqueous submicron zirconia particulate suspension stabilised with two polyvalent organic salt dispersants called Tiron and Aluminon including a poly(vinyl) alcohol (PVA) binder are investigated. It is observed that dispersants adsorbs to the zirconia particles and significantly influenced the rheology of the systems. The addition of PVA in combination with the dispersants causes the flocculation of the particles in the suspension. For a given amount of the dispersant, increasing the PVA concentration increases the viscosity, storage and loss moduli. At relatively low PVA concentrations, the excess amount of the dispersant in the system causes the flocculation by a reduction of the electrostatic (double layer) effect, whereas at relatively higher PVA concentration depletion flocculation occurs.
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Keywords: BINDER; PROCESSING; RHEOLOGY; SUSPENSIONS; ZRO2

Document Type: Research Article

Publication date: December 1, 2012

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  • Journal of Colloid Science and Biotechnology is an international multidisciplinary peer- reviewed journal covering all aspects of colloid science including colloids preparation, characterization, structure-property relationships, spectroscopy, chemical and physical properties and applications of colloids in biotechnology, medicine and pharmaceuticals. This journal deals with interdisciplinary research areas of chemistry, physics, biology, materials science, polymer science, nanotechnology covering all topics related to colloids such as latexes, emulsions, suspensions, micellar systems, gels, composites, hybrids, surfactants, aerosols, foams, minerals, soft matter, microfluidics, encapsulation processes of active molecules, biomolecules, surfacial and interfacial processes, catalysis, electrochemistry, theoretical aspects, computer simulations and colloids in biotechnology and medicine.
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