Rheological Characterization of Formulations

The formulations’ rheological properties were studied using an MCR 92 modular compact rheometer (Anton Paar, Graz, Austria), equipped with a CP35-2 cone-plate sensor system (angle 2°, diameter 35 mm) and a P-PTD 200/AIR Peltier plate to keep the measurement temperature constant at 25 °C. Dynamic viscosity measurements were performed at shear rates between 0.01 and 1000 s⁻¹. Frequency sweep analysis was performed at frequencies ranging from 0.01 to 10 Hz, for a constant strain of 0.1–1.0% that was well within the linear viscoelastic limit evaluated through preliminary amplitude sweep tests [14 (link)].

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Baptista S, & Freitas F. (2022). Formulation of the Polysaccharide FucoPol into Novel Emulsified Creams with Improved Physicochemical Properties. Molecules, 27(22), 7759.

Publication 2022

MCR 92 P-PTD 200/AIR

Cone Strain Viscosity

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Variable analysis

independent variables

Shear rate
Frequency

dependent variables

Dynamic viscosity
Viscoelastic properties

control variables

Measurement temperature (25 °C)
Cone-plate sensor system (angle 2°, diameter 35 mm)
Constant strain (0.1-1.0%)

controls

Preliminary amplitude sweep tests to evaluate the linear viscoelastic limit

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