Salt and ion transport in a series of crosslinked AMPS/PEGDA hydrogel membranes - GAP IF

Research Details

Hydrogel membranes were prepared using UV irradiation
Salt permeability, water permeability and ionic conductivity were measured
Theory and experiment were in good agreement for ionic conductivity in highly charged membranes.


This manuscript reported salt and ion transport properties in synthesized polymers exhibiting controlled charge density and water uptake.  Given their ion selective nature, charged polymers are important for water purification and energy generation applications. Salt and ion transport properties are central to membrane performance and are frequently correlated to charge density and water uptake. However, systematic studies connecting polymer structure and ion transport properties in charged polymers are not widely available. Through careful adjustment of synthesis conditions, polymers with varied charge and water content were prepared.  To develop structure-property relationships, salt and ion transport properties were experimentally measured and interpreted using the solution-diffusion model, the Nernst-Planck equation, the Donnan/Manning model, and the Mackie and Meares model. By utilizing a system with broadly varied structural properties, these results highlighted the generalities and limitations in current theories.


This work was supported as part of the Center for Materials for Water and Energy Systems (M-WET), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award #DE-SC0019272.

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Ni Yan, Rahul Sujanani, Jovan Kamcev, Eui-Soung Jang, Kentaro Kobayashi, Donald R. Paul, and Benny D. Freeman, "Salt and Ion Transport in a Series of Crosslinked AMPS/PEGDA Hydrogel Membranes," Journal of Membrane Science, 653, 120549, 2022 July 5,