Ultrafiltration membranes based on interpolyelectrolyte complexes of sulfonate-containing aromatic copolyamide, acrylonitrile–N,N-dimethyl-N,N-diallylammonium chloride copolymer, and poly-N,N-dimethyl-N,N-diallylammonium chloride were prepared. Their structure and surface electrical properties were studied. The correlation between the procedure for performing the interpolymer reaction, the degree of conversion, the composition of the resulting complex, and the membrane characteristics was revealed. The electrokinetic potential of the membrane specimens varies in the interval from–35.2 to +3.1 mV. The interpolymer compound composition, surface electrical properties of the membranes, and their activity in sorption of base and acid dyes correlate with each other. Therefore, it is appropriate to use these dyes as test systems for determining the nature and concentration of free ionic groups. The effect of the membrane preparation procedure on the charge distribution pattern on the membrane separation surface is considered.
Russian Journal of Applied Chemistry – Springer Journals
Published: May 22, 2016
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