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.
- Cellulose triacetate
- Hybrid membranes
Resina, M., Macanás, J., de Gyves, J., & Muñoz, M. (2007). Development and characterization of hybrid membranes based on an organic matrix modified with silanes for metal separation. Journal of Membrane Science, 289(1-2), 150-158. https://doi.org/10.1016/j.memsci.2006.11.049