https://scholars.lib.ntu.edu.tw/handle/123456789/410385
標題: | Synthesis of mechanically robust epoxy cross-linked silica aerogel membranes for CO 2 capture | 作者: | Lin Y.-F. Lin Y.-J. Lee C.-C. Lin K.-Y.A. Chung T.-W. Tung K.-L. |
關鍵字: | CO 2 capture;Mechanical strength;Membrane contactor;Superhydrophobic;Tri-epoxy cross-linked SiO 2 aerogel | 公開日期: | 2018 | 卷: | 87 | 起(迄)頁: | 117-122 | 來源出版物: | Journal of the Taiwan Institute of Chemical Engineers | 摘要: | Mesoporous SiO 2 aerogels are multi-functional porous materials with diverse applications. However, the fragile characteristics and low mechanical strength of mesoporous SiO 2 aerogels limits their development for use in industrial applications. The mechanical strength of SiO 2 aerogels can be greatly enhanced by the addition of tri-epoxy cross-linkers. Tri-epoxy cross-linked SiO 2 aerogels with tri-epoxy concentrations of 7.5%, 15%, 30% and 45% were coated on macroporous Al 2 O 3 membrane supports. The surface of the tri-epoxy cross-linked SiO 2 aerogel membranes became superhydrophobic after fluoroalkylsilane (FAS) modification. Compared to native SiO 2 aerogel membranes in the absence of tri-epoxy cross-linker, the pore size of the tri-epoxy cross-linked SiO 2 aerogel membranes with tri-epoxy concentrations of 15% and 30% increased to approximately 6 nm, resulting in an increase in the CO 2 absorption flux. The highest CO 2 absorption flux of 1.4 mmol/m 2 s was reached for the tri-epoxy cross-linked SiO 2 aerogel membrane with a tri-epoxy concentration of 15%. The durability of the as-prepared SiO 2 aerogel membranes for CO 2 absorption is also demonstrated in this work. Consequently, the mechanically robust tri-epoxy cross-linked SiO 2 aerogel membranes have potential applications in membrane contactor systems for CO 2 capture. ? 2018 Taiwan Institute of Chemical Engineers |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/410385 | ISSN: | 18761070 | DOI: | 10.1016/j.jtice.2018.03.019 |
顯示於: | 化學工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。