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Materials 2018, 11(6), 990; https://doi.org/10.3390/ma11060990

Preparation of a Porous, Sintered and Reaction-Bonded Si3N4 (SRBSN) Planar Membrane for Filtration of an Oil-in-Water Emulsion with High Flux Performance

1
Chinese Academy of Sciences Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
2
Materials Science and Engineering Department, University of Ioannina, GR-451 10 Ioannina, Greece
*
Author to whom correspondence should be addressed.
Received: 10 May 2018 / Revised: 8 June 2018 / Accepted: 9 June 2018 / Published: 11 June 2018
(This article belongs to the Section Porous Materials)
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Abstract

A porous, sintered, and reaction-bonded Si3N4 (SRBSN) planar membrane was prepared by phase-inversion tape-casting, nitridation (at 1350 °C), and sintering (at 1650 °C) of silicon slurry. The membrane was comprised of uniform rod-like β-Si3N4 crystals with a large length/diameter ratio and had high porosity and bending strength. The prepared membrane features a typical asymmetric structure with a skin layer, a sponge layer, and finger-like voids and an average pore size of 0.61 μm. A high permeation flux of 367 L m−2 h−1 and an oil rejection of 88.6% were recorded in oil-in-water emulsion separation experiments. These results suggest that SRBSN membranes have excellent potential for the treatment of oily wastewater. View Full-Text
Keywords: SRBSN; porous ceramic; membrane filtration; oil–water separation SRBSN; porous ceramic; membrane filtration; oil–water separation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Li, L.; Gao, E.-Z.; Abadikhah, H.; Wang, J.-W.; Hao, L.-Y.; Xu, X.; Agathopoulos, S. Preparation of a Porous, Sintered and Reaction-Bonded Si3N4 (SRBSN) Planar Membrane for Filtration of an Oil-in-Water Emulsion with High Flux Performance. Materials 2018, 11, 990.

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