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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%.
Originalsprog | Engelsk |
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Tidsskrift | Journal of Membrane Science |
Vol/bind | 472 |
Sider (fra-til) | 232–240 |
Antal sider | 9 |
ISSN | 0376-7388 |
DOI | |
Status | Udgivet - 2014 |
Fingeraftryk
Dyk ned i forskningsemnerne om 'One-step deposition of ultrafiltration SiC membranes on macroporous SiC supports'. Sammen danner de et unikt fingeraftryk.Projekter
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Low-Energy, High-Stability, Ceramic Reverse Osmosis Nano Membrane
Christensen, M. L. & Boffa, V.
01/07/2011 → 31/05/2014
Projekter: Projekt › Forskning