TY - JOUR
T1 - Development and characterization of hybrid membranes based on an organic matrix modified with silanes for metal separation
AU - Resina, M.
AU - Macanás, J.
AU - de Gyves, J.
AU - Muñoz, M.
PY - 2007/2/15
Y1 - 2007/2/15
N2 - 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.
AB - 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.
KW - Cellulose triacetate
KW - D2EHPA
KW - Hybrid membranes
KW - Plasticizer
KW - Silanes
U2 - 10.1016/j.memsci.2006.11.049
DO - 10.1016/j.memsci.2006.11.049
M3 - Article
SN - 0376-7388
VL - 289
SP - 150
EP - 158
JO - Journal of Membrane Science
JF - Journal of Membrane Science
IS - 1-2
ER -