Development and characterization of hybrid membranes based on an organic matrix modified with silanes for metal separation

M. Resina, J. Macanás, J. de Gyves, M. Muñoz

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34 Citations (Scopus)

Abstract

New hybrid membranes for metal ion transport were synthesized with the aim of improving mechanical and chemical stabilities, mean lifetime and loss of carrier. Hybrid organic-inorganic materials present several advantages with respect to organic and inorganic materials considered independently. Organic-matrix membranes usually have limitations related to chemical and thermal stabilities while organosilicone materials may present serious difficulties for film formation. The new membranes proposed here are based on a mixture of organic (cellulose triacetate, CTA) and organosilicone materials (dichlorodimethylsilane and tetraethoxysilane, DDMS and TEOS, respectively) as membrane support. Membrane preparation was optimized varying the amount of metal carrier (bis(2-ethyl hexyl phosphoric acid), D2EHPA) and plasticizer (2-nitrophenyloctyl ether, NPOE and/or tris(2-butoxyethyl)phosphate), TBEP). Total Reflection Infrared Spectroscopy, Scanning Electron Microscopy, Thermogravimetric Analysis, 29Si Nuclear Magnetic Resonance and X-Ray Diffraction were used to characterize the hybrid membranes and to correlate structural properties with permeability values for zinc metal ions. © 2006 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)150-158
JournalJournal of Membrane Science
Volume289
Issue number1-2
DOIs
Publication statusPublished - 15 Feb 2007

Keywords

  • Cellulose triacetate
  • D2EHPA
  • Hybrid membranes
  • Plasticizer
  • Silanes

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