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Abstract
We fabricated nearly defect-free SiC membranes for potential ultrafiltration applications by conducting pyrolysis of allylhydrido polycarbosilane in the presence of submicron α-SiC particles. The SiC membranes were developed on commercial macroporous SiC supports by a low-temperature-process in which allylhydrido polycarbosilane acted to bond together crystalline α-SiC particles to form a porous layer. The suspensions of α-SiC powder and allylhydrido polycarbosilane in hexane or hexane/tetradecane were used for membrane fabrication by dip-coating. By using optimized hexane suspension with 5% w/w α-SiC powder and mass ratios of allylhydrido polycarbosilane to α-SiC powder of 0.6 and 0.8, we obtained nearly defect-free and uniform mesoporous membranes in a single coating procedure. No defects were found on the surface of these membranes by scanning electron microscopy. Moreover, during filtration tests, these membranes showed a water permeance of 0.05-0.06 L (m2 h bar) 1 and retention higher than 93% for polyethylene glycol (PEG) with a molecular mass of 100 kDa. Retention for PEG with molecular masses of 1 kDa, 8 kDa and 35 kDa was between 25% and 71%.
Original language | English |
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Journal | Journal of Membrane Science |
Volume | 472 |
Pages (from-to) | 232–240 |
Number of pages | 9 |
ISSN | 0376-7388 |
DOIs | |
Publication status | Published - 2014 |
Keywords
- SiC membrane
- polycarbosilane
- ultrafiltration
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Dive into the research topics of 'One-step deposition of ultrafiltration SiC membranes on macroporous SiC supports'. Together they form a unique fingerprint.Projects
- 1 Finished
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Low-Energy, High-Stability, Ceramic Reverse Osmosis Nano Membrane
Christensen, M. L. & Boffa, V.
01/07/2011 → 31/05/2014
Project: Research