Guar plants (Cyamopsis tetragonoloba) are found on the Indian subcontinent. Guar gum, a nonionic natural hydrocolloid, is obtained from the refined endosperms of guar seeds. Technically a galactomannan, it is more commonly referred to as a mannogalactan. When dispersed in water, it hydrates to provide sol (colloidal dispersion). The sol’s viscosity remains unaffected in the 1.0 – 10.5 pH range. It is used as a potable water clarifying agent, a gangue depressant in the beneficiation of several ores, and a filter aid for filtering ore concentrates. For all such purposes, sol is generally used in the concentration range from 2.5 to 5.0 kg/m3. Unfortunately, the literature does not provide any information on apparent viscosity properties of guar gum sols. This paper reports some useful information on apparent viscosity properties.
KeywordsShear Rate Apparent Viscosity Colloidal Dispersion Cellulose Solution Viscosity Characteristic
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- 1.W.L. Wilkinson, Chapter 1 in “Non-Newtonian Fluids,” Pergamon Press, London (1960).Google Scholar