If you have any other questions or need other size, please get a quote.
Butylskii, Dmitrii Y., et al. Membranes 12.11 (2022): 1065.
Polyquaternium-22 (PQ-22), a copolymer of acrylic acid and diallyldimethylammonium chloride (DADMAC), has been utilized to modify anion-exchange membranes for electrodialysis applications. This modification process enhances the membrane's ionic properties by replacing weakly basic amino groups with quaternary ammonium groups, thereby improving ion exchange efficiency.
The modification process involved immersing pristine MA-41P and Ralex AHM-PES membranes in a 2.5% aqueous PQ-22 solution for 8 hours. This treatment facilitated the incorporation of PQ-22 onto the membrane surface through interactions between its carboxyl groups and the fixed positively charged sites on the membrane. Notably, the quaternary ammonium groups of PQ-22 contributed to enhanced ion transport without significantly altering the original membrane's structural parameters.
Experimental results indicated that PQ-22-modified membranes exhibited improved ion selectivity and stability, making them more effective in electrodialysis applications. This study highlights the potential of PQ-22 as a functional polymer for optimizing anion-exchange membranes in industrial and environmental processes.
