Development of a flow cell to study dynamic interfacial tension of solid-liquid flow by fluorescence depolarization

DEVELOPMENT OF A FLOW CELL TO STUDY DYNAMIC INTERFACIAL TENSION OF SOLID-LIQUID FLOW BY FLUORESCENCE DEPOLARIZATION. A simple low-cost flow cell was developed, built and optimized in order to observe dynamic interfacial tension of continuous flow systems. Distinct materials can be used in one of the cell walls in order to observe the intermolecular forces between the flowing liquid and the chemical constitution of the walls, The fluorescence depolarization was evaluated using Rhodamine B as fluorescent probe seeded in ethylene glycol. The effects of the positioning angles on the data acquired across the cell are reported. The reproducibility of the data was evaluated with a spectrometer assembled in-house and the relative standard deviation was below 3%.