Porous β-Sialon planar membrane with a robust polymer-derived hydrophobic ceramic surface
Abstract(#br)A novel method of fabricating an all-ceramic hydrophobic membrane is proposed. First, porous β-Sialon planar ceramic membrane was prepared by a phase inversion and sintering method. Then, the β-Sialon ceramic membrane was coated with a uniform polydimethylsiloxane (PDMS) layer through a poly-condensation reaction. Finally, through post-heat treatment in N 2 atmosphere, the polymer layer was transformed into a tough hydrophobic vesicular ceramic layer with strong covalent Si-O and Si-N skeleton and Si-CH 3 terminal groups in the surface.