Influence of Energy Input on Suspension Properties

Anja Meyer; Kerstin Lenzner; Annegret Potthoff

doi:10.4028/www.scientific.net/AST.62.141

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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 62Influence of Energy Input on Suspension Properties

Influence of Energy Input on Suspension Properties

Abstract:

Electrosteric stabilization of a commercially available boehmite powder in water was investigated to perform milling experiments and reduce the particle size to the nanoscale range. The effect of three sodium polyacrylate dispersants (Na-PA) with different molar masses (2,100, 8,000, 15,000 g/mol) on the suspension properties before and after milling experiments was assessed by electroacoustic measurements in comparison with rheological tests. A significant loss of the stabilizing effect of the sodium polyacrylates due to the application of mechanical energy was detectable. Measurements of the adsorbed amount of the dispersants after milling via detection of the COD in the background solution show a considerable desorption from the particle surface. Accessorily performed analyses of the molar mass of the polymers yielded a destruction of the polymer chains due to the mechanical energy.

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Advances in Science and Technology (Volume 62)

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141-146

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https://doi.org/10.4028/www.scientific.net/AST.62.141

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Online since:

October 2010

Authors:

Anja Meyer, Kerstin Lenzner, Annegret Potthoff

Keywords:

Aqueous Suspension, Boehmite, Milling, Sodium Polyacrylate, Stabilisation

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