SiC_fibers_movie.mp4 (37.99 MB)

Highly permeable and mechanically robust silicon carbide hollow fiber membranes: Supplementary Video

Download (37.99 MB)
dataset
posted on 15.12.2014 by Patrick de Wit
Silicon carbide (SiC) membranes have shown large potential for applications in water treatment. Being able to make these membranes in a hollow fiber geometry allows for higher surface-to-volume ratios. In this study, we present a thermal treatment procedure that is tuned to produce porous silicon carbide hollow fiber membranes with sufficient mechanical strength. Thermal treatments up to 1500 °C in either nitrogen or argon resulted in relatively strong fibers, that were still contaminated with residual carbon from the polymer binder. After treatment at a higher temperature of 1790 °C, the mechanical strength had decreased as a result of carbon removal, but after treatments at even higher temperature of 2075 °C the SiC-particles sinter together, resulting in fibers with mechanical strengths of 30–40 MPa and exceptionally high water permeabilities of 50,000 L m−2 h−1 bar−1. In this supplementary video we demonstrate the mechanical robustness and extreme clean water fluxes in a visual manner.

History

Contributors

Arian Nijmeijer; Emiel J. Kappert; Matthias Wessling; Nieck E. Benes; Theresa Lohaus

Publisher

University of Twente

Format

media types: video/mp4

Exports

Logo branding

Exports