Enhancement of Hydrothermal Stability and Hydrophobicity of a Silica MCM-48 Membrane by Silylation

摘要: An MCM-48 membrane was prepared on a porous α-alumina support by hydrothermal synthesis. The silylation with trimethylsilane and triethylsilane used to enhance stability hydrophobicity of the membrane. studies X-ray diffraction, Fourier transform infrared (FTIR), nitrogen adsorption, water adsorption were carried out using an powder characterize pore surface MCM-48. FTIR study indicates that silyl group substituted for Si−OH sizes nonsilylated silylated 2.4 (nonsilylated), 1.9 (trimethylsilylated), 1.8 nm (triethylsilylated). showed significantly changed hydrophobic silylation. trimethylsilylated membranes separation ethanol/water mixture. factor 16 through membrane, although membran...