RHEOLOGICAL PROPERTIES AND APPLICATIONS OF MESQUITE TREE (PROSOPIS JULIFLORA) GUM 4. RHEOLOGICAL PROPERTIES OF MESQUITE GUM FILMS AT THE OIL-WATER INTERFACE.

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Abstract
The creep compliance-time behaviour of mesquite films adsorbed at a liquid paraffin-water interface ha s been studied as a function of gum concentration, pH and NaCl or CaCl2 concentration. All the films exhibited viscoelasticity after a short aging time, but at longer aging times only elasticity was found. The lowest values of the rheological parameters were observed at pH 7.0 when pH was varied. Higher values were found at all aging times when NaCl or CaCl2, was added to the aqueous phase with NaCl exerting a slightly greater effect.