Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 384, Issue 1-2, Pages 149-156Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2011.09.018
Keywords
Methylated SiO2; Hydrophobic nanofiltration membrane; Hexane; Nanopermporometry
Categories
Ask authors/readers for more resources
Methylated SiO2 colloidal sol solutions were prepared by hydrolysis and condensation reactions of mixed tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) using EtOH as a solvent with NH3 as a catalyst. Organic/inorganic hybrid membranes were prepared by coating porous substrates with the methylated SiO2 solutions and calcinating at 400-600 degrees C in an N-2 atmosphere. Nanopermporometry characterization using water and hexane as a condensable vapor confirmed the successful preparation of hydrophobic nano-sized pores of 2-4 nm (hexane-based). The hexane permeability of methylated SiO2 membranes was almost constant following the addition of water in concentrations of 0-80 ppm (saturated), but the permeability of hydrophilic TiO2 membranes was decreased by the addition of water. Methylated SiO2 membranes were applied for the nanofiltration of polyolefin oligomers in hexane solutions. The hexane permeability of polyolefin oligomers/hexane solutions was approximately the same as that of pure hexane, which suggested there was no fouling of the hydrophobic SiO2 membranes and hexane solutions. Methylated SiO2 membranes showed a hexane permeability of 2.0-7.58 x 10(-11) m(3)/(m(2) s Pa), which corresponds to 7.2 and 27 L/(m(2) h bar), with molecular weight cut-offs of 1000-2000. (C) 2011 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available