Preparation of organosilica membranes on hydrophobic intermediate layers and evaluation of gas permeation in the presence of water vapor》.pdfVIP

Journal of Membrane Science 496 (2015) 156 –164 Contents lists available at ScienceDirect Journal of Membrane Science journal homepage: /locate/memsci Preparation of organosilica membranes on hydrophobic intermediate layers and evaluation of gas permeation in the presence of water vapor Xiuxiu Ren, Masakoto Kanezashi, Hiroki Nagasawa, Toshinori Tsuru n Department of Chemical Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan a r t i c l e i n f o a b s t r a c t Article history: Ceramic membranes were newly developed with hydrophobic intermediate layers to achieve high gas Received 5 February 2015 permeance in the presence of water vapor. Me-SiO2 sols, which were prepared by co-precursors of Received in revised form tetraethoxysilane (TEOS) and methyltrimethoxysilane (MTMS) were coated as intermediate layers. Two 20 August 2015 types of organosilica sols prepared with bis(triethoxysilyl)ethane (BTESE) and bis(triethoxysilyl)octane Accepted 23 August 2015 (BTESO) were used for the top layers. By characterization of nanopermporometry using hexane and Available online 3 September 2015 water as condensable vapors, Me-SiO2 layers showed pore diameter of approximately 1.5 nm and ex- Keywords: hibited hydrophobic properties and that SiO2–ZrO2 layers were hydrophilic. BTESE- and BTESO-derived Organosilica membrane