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Preparation of Organic-inorganic Hybrid PES Membranes using Fe(II) Clathrochelate  

Jung, Bo Ram (Institute of Industrial Technology, Dongeui University)
Son, Yeji (Department of Environmental Engineering, Dongeui University)
Lee, Yong Taek (College of Environment and Applied Chemistry, KyungHee University)
Kim, Nowon (Department of Environmental Engineering, Dongeui University)
Publication Information
Membrane Journal / v.23, no.1, 2013 , pp. 80-91 More about this Journal
Abstract
Metal-templated condensation of cyclohexanedione dioxime and phenylboronic acid in the presence of Fe(II) sulfate heptahydrate proceeds cleanly in methanol to furnish the Fe(II) clathrochelate. An organic/inorganic hybrid membranes composed of Fe(II) clathrochelate and polyethersulfone was prepared by using phase inversion method. For membrane preparation, the Fe(II) clathrochelate was highly soluble (3~5 g/L) in DMF, NMP, and DMAc, which meets the requirements for the solubility of metal complexes in polar aprotic solvent used in membrane preparation. It was stable even in the presence of strong acids, such as trifluorosactic acid (pKa = 0.3). It was characterized by UV-vis spectroscopy, and their stability in solution phase studied in the presence of (i) strong acids or (ii) competing chelates. Organic/inorganic hybrid membranes were prepared with polyethersulfone, polyvinylpyrrolidone, p-toluenesulfonic acid, Fe(II) clathrochelate and DMF by using nonsolvent induced phase inversion method. The addition of Fe(II) clathrochelate leads increase of surface pore density, mean pore size and flux. We can obtain highly asymmetric membranes by addition of Fe(II) clathrochelate.
Keywords
metal-templated condensation; polyethersulfone; nonsolvent induced phase inversion; microporous membrane; Fe(II) clathrochelate;
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