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Abstract: Highly selective cellulose acetate (CA) blend imprinted membranes for salicylic acid (SA) removal were synthesized by phase inversion technique with chitosan as a functional polymer and chitosan-wrapped multi-walled carbon nanotubes (CHI-wrapped MWCNTs) as the additives. The surface and cross-sectional morphology of membranes were strongly affected by the amount of CHI-wrapped MWCNTs. As compared to M1-MIM, M2-MIM, and M4-MIM, the M3-MIM with 2.0 wt % CHI-wrapped MWCNTs showed higher membrane flux, faster kinetic, binding capacity and better selectivity for SA. The experimental data of adsorption kinetic were well fitted to the pseudo-second-order kinetic model by multiple regression analysis. The M3-MIM had the maximum adsorption capacity for SA. The selectivity coefficients of SA to p-hydroxybenzoic acid (p-HB) and acetylsalicylic acid (ASA) over M3-MIM were 6.3090 and 6.0019, respectively, showing that M3-MIM had excellent binding affinity and selectivity for separation of SA from SA-contained aqueous solution. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42654
Template and target information: salicylic acid, SA, 2-hydroxybenzoic acid
Author keywords: adsorption, membranes, separation techniques