Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions
Abstract
:1. Introduction
2. Model Equations
3. Experimental
3.1. Membranes and Materials
3.2. Measurement of the Electro-Osmotic Flow and Current-Voltage Curves
4. Results and Discussion
4.1. Liquid Uptake of the Membranes
4.2. Determination of the Dissipated Energy
4.3. Electro-Osmotic Permeability
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Membrane | dm (10−6 m) | ρm (kg m−3) | IEC (meq g−1) | λ * | |
---|---|---|---|---|---|
Water | Ethanol | ||||
NF117 | 181 | 1.98 | 0.94 | 11 | 2 |
MK40 | 450 | 1.12 | 1.52 | 15 | 2 |
CR67 | 685 | 0.833 | 2.1 | 17 | 2 |
Membrane | Cell Resistance in Pure Water (kΩ) | Slope (kΩ/% wt.) |
---|---|---|
NF117 | 0.928 ± 0.033 | 0.0389 ± 0.0012 |
MK40 | 0.974 ± 0.014 | 0.0391 ± 0.0008 |
CR67 | 0.881 ± 0.012 | 0.0342 ± 0.0010 |
Membrane | Ethanol Percentage (wt.%) | β (10−9 V Pa−1) | ε |
---|---|---|---|
NF117 | 0 | 1.72 ± 0.03 | 0.27 |
25 | 2.16 ± 0.06 | 0.44 | |
50 | 1.94 ± 0.02 | 0.47 | |
75 | 1.05 ± 0.03 | 0.35 | |
MK40 | 0 | 0.95 ± 0.05 | 0.33 |
25 | 0.88 ± 0.01 | 0.33 | |
50 | 0.74 ± 0.02 | 0.29 | |
75 | 0.81 ± 0.08 | 0.25 | |
CR67 | 0 | 1.62 ± 0.10 | 0.35 |
25 | 1.40 ± 0.19 | 0.35 | |
50 | 1.34 ± 0.07 | 0.31 | |
75 | 1.07 ± 0.05 | 0.27 |
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Barragán, V.M.; Villaluenga, J.P.G.; Morales-Villarejo, V.; Izquierdo-Gil, M.A. Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions. Entropy 2020, 22, 692. https://doi.org/10.3390/e22060692
Barragán VM, Villaluenga JPG, Morales-Villarejo V, Izquierdo-Gil MA. Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions. Entropy. 2020; 22(6):692. https://doi.org/10.3390/e22060692
Chicago/Turabian StyleBarragán, V. María, Juan P. G. Villaluenga, Víctor Morales-Villarejo, and M. Amparo Izquierdo-Gil. 2020. "Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions" Entropy 22, no. 6: 692. https://doi.org/10.3390/e22060692