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Rheological studies on the solubilization by the surfactant SDS of complexes between three acidic polysaccharides and
M G Roig1, D H Rashid, J F Kennedy
1Departamento de Química Físca, Facultad de Química, Universidad de Salamanca, Spain.
Abstract:
Developments in the solubilization of complexes between the cationic polymer, poly(hexamethylenebiguanidinium chloride) (PHMBH+Cl-) and acidic polysaccharides are reported. It was discovered that the anionic detergent sodium dodecyl sulphate (SDS) is an excellent solubilizer for these complexes, enabling several multi-component systems to be studied. SDS itself was shown to interact with PHMBH+Cl- to form a highly viscous solution. Maximum viscosity was obtained with a SDS:PHMBH+Cl- molar ratio of 15.6. SDS:PHMBH+Cl- at this ratio served as a good solubilizer for the acidic polysaccharides (sodium alginate, sodium carboxymethyl cellulose, and xanthan), forming highly viscous fluids. The effect of temperature on the viscosity of these solutions was also examined.