Speaker
Description
Understanding particle-influenced evaporation in porous media is crucial for various industrial processes, including battery electrode preparation, where active particles form a framework while solutes redistribute, ultimately determining the material’s functional performance. However, predicting such behavior is challenging due to the complex coupling between capillary forces, evaporation dynamics, and interfacial flows. In this study, we utilize microfluidic models to investigate the in-situ motion and deposition of micron-sized fluorescent particles during evaporation. Using high-resolution microscopy, we track particle trajectories and quantify their accumulation near the receding contact line. Our results demonstrate that particles significantly modify both the evaporation rate and phase distribution by forming colloidal bridges when particle-laden interfaces merge. These bridges, which alter the liquid configuration and final deposition pattern, are more stable under slower evaporation conditions and are governed by interfacial rather than bulk particle concentration. These findings provide new insights into particle-induced effects in evaporation-driven transport within porous media and offer guidance for achieving controlled evaporation and deposition in porous media.
| Country | Germany |
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