Phase Inversion Temperature
Phase Inversion Temperature - Related Videos
11:00
Liquid Phase Reactor: Sucrose Inversion
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2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Both batch and continuous flow reactors are used in catalytic reactions. Packed beds, which use solid catalysts and a continuous flow, are the most common configuration. In the absence of an extensive recycle stream, such packed bed reactors are typically modeled as "plug flow". The other most common continuous reactor is a stirred tank, which is assumed to be perfectly...
08:02
Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure
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Cited by 3 •
2018
A phase-inversion co-flow device is demonstrated to generate monodisperse high-viscosity droplets above 1 Pas, which is difficult to realize in droplet microfluidics.
01:29
Inverse Trigonometric Functions
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2025
Inverse trigonometric functions are fundamental mathematical tools that reverse the actions of standard trigonometric functions. While trigonometric functions map angles to ratios, inverse trigonometric functions perform the opposite operation by mapping a ratio back to its corresponding angle. These functions are essential in various applications, particularly in determining angles when given specific distances, such as calculating elevation angles in navigation and engineering.For a function...
02:39
Phase Diagrams
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2020
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
08:41
Assessment of Cardiac Function and Myocardial Morphology Using Small Animal Look-locker Inversion Recovery (SALLI) MRI in Rats
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Cited by 2 •
2013
Contrast enhanced cardiac magnetic resonance (CMR) imaging allows comprehensive in vivo assessment of the heart in small animal models of cardiovascular disease. Here we detail the procedures to perform CMR imaging, reconstruction and analysis using Small Animal Lock-Locker Inversion Recovery (SALLI) in rats.
FAQs
Heating reduces the surfactant’s hydration and changes its hydrophilic-lipophilic balance, meaning the relative affinity of the surfactant for water and the other phase. As water affinity decreases, the surfactant becomes less favorable at its original interface arrangement. This shift drives the formulation toward the low-interfacial-tension condition associated with structural inversion.
The low-interfacial-tension state can promote formation of fine emulsions during temperature-inversion processing. Lower interfacial tension makes it easier for the formulation to reorganize as the surfactant changes its phase preference. The resulting droplet size can be controlled more effectively when composition and the temperature path are managed consistently, supporting more reproducible formulations.
Surfactant composition, heating rate, and cooling conditions all influence the inversion process and the final emulsion. Composition affects the surfactant’s balance between the phases, while the heating rate determines how the system approaches the transition. Cooling conditions then help determine whether the produced structure remains consistent and stable after processing.
A formulation is prepared with its selected phases and surfactant composition, then heated through the range containing the inversion point. Near this transition, the system passes through a low-interfacial-tension state that supports fine-emulsion formation. The formulation is subsequently cooled under controlled conditions, with the heating and cooling history recorded to improve reproducibility.
This approach is useful when bioengineers need to produce fine emulsions with controlled droplet size. The resulting emulsions can support the development of biomaterials and pharmaceutical carriers, as well as other bioengineering formulations. Its value is greatest when the composition and thermal conditions can be controlled well enough to produce a consistent emulsion structure.
Reproducibility improves when researchers control the formulation composition, heating rate, and cooling conditions rather than treating temperature as the only variable. Consistent thermal handling helps the system reach and pass through the low-interfacial-tension region in a comparable way each time. This control supports more consistent droplet size, emulsion structure, and stability across preparations.