In the thesis, we explored the interactions between droplets and a pharmaceutical tablet. Understanding the behavior of droplets upon contact with the tablet is crucial for comprehending and optimizing the industrial tablet coating process. To describe the interaction between dispersion droplets and the tablet, we conducted several experiments simulating industrial coating conditions. We applied droplets of different sizes and compositions onto the tablets, analyzed the impact of droplet deposition frequency, and measured the penetration depth of the substance into the tablet core. The processes were monitored using a high-speed camera. We found that the hydrophobicity of the tablet and the type of liquid used to create the droplets affect the penetration depth. The results also indicate that when droplets are applied to the same spot, the penetration depth does not increase linearly. We discovered that ethanol spreads more across the surface of the pharmaceutical tablet but does not penetrate as deeply as water. We also found that increasing the solid content in the coating solvent reduces the wetting depth. Additionally, we concluded that droplets are absorbed more deeply in more hydrophilic tablets.
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