Design and implementation of a mixer for different physical and chemical properties liquid-liquid mixing and mixing performance evaluation with a UV-Visible spectrophotometer

The present work represents a minifluidic active mixer for different properties of liquid mixing. It consists of the SP-5H piezoelectric patch pasted on an Aluminium beam. The patch, in combination with the Aluminium beam, acts as a piezoelectrically vibrating beam. When the patch is excited by a suitable voltage, it starts vibrating, and the generated vibration energy moves from the beam to the test liquid inside the tank. It results in the circulation of liquid in all directions robustly. Adequate liquid-liquid mixing occurs in the tank, even in the inner side of the tank. The study elaborates the mixing of aqueousalcohol and aqueous-alcohol-viscous solutions. Solutions of different dye concentrations in the solvent, deionized (DI) water and ethanol, were mixed through the proposed technique. A UV-Visible spectrophotometer measured the unmixed and mixed solution's absorbance values at the maximum absorptivity kmax. Absorbance of unmixed 5 mg l(-1) aqueous methyl red and 10 mg l(-1) alcohol based bromothymol blue solutions were 0.065, 0.598 at 410 and 431 nm, respectively and after mixing, the absorbance of the mixed solution was 0.029 and 0.032 at 410 and 431 nm. Likewise, viscous liquid glycerin was mixed in an aqueous and alcohol based dye solutions. Copyright (c) 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Chemical Engineering Conference 2021 (100 Glorious Years of Chemical Engineering & Technology).

Automated summary

This study presents a minifluidic active mixer for liquid mixing with different properties. The mixer utilizes a piezoelectric vibrating beam to circulate and mix the liquid in a tank.