The results showed a significant and stable rejection of the optimally modified membrane (higher than 96 %), however, the bare membrane showed a decreasing trend in rejection over filtration (between 45 and 60 %).
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Modeling and optimization of surface modification process of ultrafiltration membranes by guanidine-based deep eutectic solvent.
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The sentences
When the PEI membrane surface is modified with the hydrophilic DES, the WCA of the modified membranes decreases, and the -ΔGs values show an increasing trend, indicating enhanced hydrophilicity of the PEI membrane surface.