What is the relationship between viscosity and dispersion efficiency? The reason why dispersion becomes difficult under high viscosity conditions.
In dispersion processes, viscosity is an important factor that significantly affects dispersion efficiency. Generally, as viscosity increases, fluidity decreases, making it more difficult for dispersion energy to be transmitted to the particles.
When viscosity is low, liquids flow easily, and shear energy is widely transmitted throughout the system, making it relatively easy to break apart particle agglomerates. On the other hand, as viscosity increases, flow becomes localized, and shear tends to be concentrated near the equipment. As a result, there is a mixture of particles that receive sufficient energy and those that do not, leading to variability in the dispersion state.
Additionally, under high viscosity conditions, the movement of particles is also restricted, making collisions and breakdowns between agglomerates less likely. Consequently, even if the mixture appears homogeneous, there may be undispersed regions remaining internally.
To enhance dispersion efficiency, it is crucial to implement appropriate shear conditions and flow designs according to viscosity. Particularly in inline continuous processing, it is possible to provide uniform shear to the particles within the flow, allowing for efficient transmission of dispersion energy even under high viscosity conditions.
In dispersion processes, optimizing flow, shear, and processing time while considering the effects of viscosity is key to achieving stable dispersion quality.

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