Selective Transport of Aromatic Molecules across Ultrathin Separation Membranes of p-Sulfonato-calix[n]arenas and Cationic Polyelectrolytes

Abstract:

Ultrathin separation membranes were prepared upon alternate electro-static layer-by-layer (lbl) adsorption of anionic p-sulfonatocalix-[arenes (calix8 and calix6) and cationic Polyvinylamine (PVA) polyelectrolytes on porous polyacrylonitrile/polyethylene terephthalate (PAN/PET) substrates. The permeation rates (P_R) of a variety of neutral and charged aromatic compounds across calix8/PVA and calix6/PVA membranes are investigated. The solutes were aniline (An), phenol (Ph), naphthalene (Np), alkali metal salts of benzene sulfonate (BS), naphthalene 2-sulfonate (NS) and benzene disulfonate (1, 3-BDS). For the neutral compounds, a size-selective transport was found. For charged aromatic compounds, the transport was both size-and charge-selective. Size and charge-selectivity lead to a separation factor α (Ph/1, 3-BDS) of 333.

• Periodical: Advanced Materials Research (Volume 685)
• Pages: 378-382
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.685.378
• Online since: April 2013
• Authors: Ashraf El-Hashani, Bernd Tieke
• Keywords: Calixarene, Layer-by-Layer, Macrocyclic Compounds, Ultrathin Separation Membranes

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