Emulsion Viscosity Analysis
Emulsion Viscosity Analysis - Related Videos
08:04
Viscosity of Propylene Glycol Solutions
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2023
Source: Michael G. Benton and Kerry M. Dooley, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Viscosity is a measure of a fluid's resistance to flow, and it is a useful parameter in the design of efficient product processing and quality control in a wide range of industries. A variety of viscometers are used to obtain the most accurate readings of experimental materials. The standard method of measuring viscosity is through a glass tube viscometer, which...
01:17
Viscosity
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2023
When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup. The SI unit of viscosity is...
01:27
Viscosity
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2026
Viscosity is a property of fluids that measures their resistance to flow. It is influenced by factors such as the surface area of contact, the gradient of flow speed, and the fluid's viscosity constant, called the coefficient of viscosity. The coefficient of viscosity, also known as dynamic viscosity, is denoted by the symbol η. It determines the proportionality between the viscous force and the gradient of flow speed.Newton's law of viscosity states that the viscous force on a faster-moving...
05:44
A Rapid, Simple, and Standardized Homogenization Method to Prepare Antigen/Adjuvant Emulsions for Inducing Experimental Autoimmune Encephalomyelitis
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Cited by 3 •
2022
To induce experimental autoimmune encephalomyelitis, an animal model of multiple sclerosis, mice are immunized with a water-in-oil emulsion containing an autoantigen and complete Freund's adjuvant. While several protocols exist for the preparation of these emulsions, a rapid, simple, and standardized homogenization protocol for emulsion preparation is presented here.
02:57
Surface Tension, Capillary Action, and Viscosity
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2020
Surface Tension The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
FAQs
A shear-rate sweep shows whether the emulsion maintains the same viscosity as applied shear changes. If the measured value varies with shear rate, the formulation has rate-dependent flow behavior rather than a single viscosity value. This distinction matters when predicting how a bioengineered emulsion will behave during mixing, injection, or other processing steps.
Dispersed-phase concentration can change the measured viscosity, while continuous-phase properties contribute to the emulsion’s overall flow response. Examining these factors helps connect a formulation’s composition with its behavior rather than treating viscosity as an isolated number. That connection supports formulation design and process optimization for biological materials, pharmaceuticals, and engineered carriers.
Droplet interactions provide a structural explanation for differences in flow behavior. When viscosity data are considered alongside those interactions, researchers can relate the measured response to emulsion structure, stability, and performance. This interpretation is useful for deciding whether a formulation is suitable for intended handling or for guiding changes during development.
A rheometer applies controlled shear or deformation to the emulsion and records the resulting stress. Researchers can then evaluate how the response changes with shear rate, time, or dispersed-phase concentration. Using controlled conditions makes it possible to compare formulations systematically and identify flow behavior relevant to mixing, injection, processing, or storage.
Tracking viscosity over time can show whether a formulation’s flow response remains consistent during the selected observation period. Combining time-dependent measurements with controlled shear or deformation helps distinguish repeatable behavior from changes associated with formulation structure. This information is relevant to storage assessment and to processes that require reliable handling over time.
Bioengineering applications include characterization of emulsions made with biological materials, pharmaceutical formulations, and engineered carriers. The resulting measurements can support quality control, process optimization, and development of advanced biomaterials. They also help evaluate whether a formulation has flow behavior compatible with practical requirements such as mixing, injection, processing, or storage.