Membranes for gas separation based on poly(1-trimethylsilyl-1-propyne)–silica nanocomposites |
| |
| Institution: | 1. University of Ottawa, Department of Chemical and Biological Engineering, 161 Louis Pasteur, Ottawa, Ontario, Canada, K1N 6N5;2. Middle East Technical University, Department of Chemical Engineering, Ankara 06800, Turkey;1. Institute on Membrane Technology (ITM-CNR), Via P. Bucci 17C, I-87036 Rende, CS, Italy;2. School of Chemistry, University of Manchester, Manchester, M13 9PL, UK;3. Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic;4. Fraunhofer-Institut für Angewandte Polymerforschung IAP, Geiselbergstr. 69, 14476 Potsdam, Germany;5. A.V. Topchiev Institute of Petrochemical Synthesis, 29 Leninsky Prospect, 119991, Moscow, Russian Federation;6. N.N.Semenov Institute of Chemical Physics, 4, Kosygina Str., Moscow, Russian Federation;1. Department of Chemistry, Amirkabir University of Technology, 424 Hafez Avenue, Tehran P.O Box: 15875-4413, Iran;2. Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, 424 Hafez Avenue, Tehran P.O Box: 15875-4413, Iran;3. Department of Polymer Science and Technology, Research Institute of Petroleum Industry, Tehran, Iran;1. Department of Chemical Engineering, Shahreza branch, Islamic Azad University, Shahreza, Iran;2. Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-8311, Iran;1. A.V. Topchiev Institute of Petrochemical Synthesis RAS, Moscow, Russian Federation;2. Moscow State University, Moscow, Russian Federation;1. Institut de Recherches sur la Catalyse et l’Environnement (IRCELYON), UMR 5256, Université de Lyon, UMR CNRS – Université Claude Bernard-Lyon 1, 2 avenue Albert Einstein, 69626 Villeurbanne Cedex, France;2. Laboratoire de Chimie de L’ENS, UMR 5182, Ecole Normale Supérieure de Lyon, CNRS, Université Claude Bernard-Lyon 1, 46 allée d''Italie, 69364 Lyon Cedex 07, France;3. Institut des Sciences Analytiques (ISA), UMR 5280, Université de Lyon, UMR CNRS – Université Claude Bernard-Lyon 1 – ENS de Lyon, 5 rue de la Doua, 69100 Villeurbanne, France |
| |
| Abstract: | Nanocomposite membranes based on poly(1-trimethylsilyl-1-propyne) (PTMSP) and silica were synthesized by sol–gel copolymerization of tetraethoxysilane (TEOS) with different organoalkoxysilanes in tetrahydrofuran solutions of PTMSP. The influence of the synthesis parameters (type and concentration of organoalkoxysilanes, temperature and time) on the silica conversion and the gas permeation performance of PTMSP–silica nanocomposite membranes was investigated and discussed in this paper. The nanocomposite membranes were characterized by single and mixed gas permeation, thermogravimetric analysis and scanning electron microscopy. The butane permeability and the butane/methane selectivity increased simultaneously when high silica conversion was obtained and the size of particle was in the range 20–40 nm. For the sake of comparison, nanocomposite membranes based on PTMSP were also prepared by dispersing silica particles with different functional groups into the PTMSP casting solution. The addition of fillers to the polymer matrix can be performed up to a higher content of silica (30% silica-filled PTMSP in contrast to 6 wt.% for the in situ-generated silica). In this case, the simultaneous increase in butane permeability and butane/methane selectivity was significantly higher when compared to the nanocomposite membranes prepared by sol–gel process. The addition of fillers with 50% of surface modification with hydrophobic groups (Si–C8H17 and Si–C16H33) seems not to lead to a significant increase of the butane/methane selectivity and butane permeability when compared to the silica with hydrophilic surface groups, probably because of the unfavorable polymer/filler interaction, leading to an agglomeration of the long n-alkyl groups at the surface of the polymer. An increase of butane permeability up to six-fold of unfilled polymer was obtained. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
