Title Physical Characterization of a Commercial Suspoemulsion as a Reference for the Development of Suspoemulsions
Authors SANTOS GARCÍA, JENIFER, Trujillo, Luis A. , Calero, Nuria , Alfaro, Maria C. , Munoz, Jose
External publication Si
Means Chem. Eng. Technol.
Scope Article
Nature Científica
JCR Quartile 2
SJR Quartile 1
JCR Impact 2.17500
SJR Impact 0.72200
Publication date 01/11/2013
ISI 000328135000008
DOI 10.1002/ceat.201300284
Abstract Viscoelasticity, low shear flow, microstructure, and physical stability of a commercial suspoemulsion pesticide are studied to serve as a point of reference for the development of new suspoemulsions. Creep compliance tests allow the zero-shear rate viscosity, (0), to be calculated. As expected, the values of (0) decrease with temperature. The storage modulus is higher than the loss modulus until a crossover frequency, *, which is located at the lower frequencies studied. The dynamic parameters decrease with higher temperature and * increases in agreement with a faster relaxation mechanism. Multiple light scattering predicts the occurrence of a creaming destabilization process, whose kinetics depends on temperature. Rheological measurements are demonstrated to be a powerful tool to assist in the prediction of destabilization processes together with the multiple light scattering technique.
Keywords Pesticide; Physical stability; Rheology; Suspoemulsion; Viscosity
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