Flexible, amine-modified silica aerogel with enhanced carbon dioxide capture performance

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• 作者：Hongyu Fan ; Zhanjun Wu ; Qiaoqi Xu ; Tao Sun
• 关键词：Flexility ; Amine modification ; Silica aerogel ; CO2 capture
• 刊名：Journal of Porous Materials
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：23
• 期：1
• 页码：131-137
• 全文大小：845 KB
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• 作者单位：Hongyu Fan (1)
  Zhanjun Wu (2)
  Qiaoqi Xu (2)
  Tao Sun (2)
  
  1. School of Physics and Materials Engineering, Dalian Nationalities University, Dalian, 116600, People’s Republic of China
  2. School of Aeronautics and Astronautics, Faculty of Vehicle Engineering and Mechanics, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, 116024, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Characterization and Evaluation Materials
  Physical Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1573-4854

文摘

One kind of flexible, amine-modified silica aerogel (AMSA) was prepared using sol–gel method and ambient drying technology. The obtained AMSA displays excellent mechanical strength. It can endure up to ca. 80 % linear compression and spring back to more than 95 % of its original size reversible deformation during uniaxial compression tests. The formed AMSA has abundant micropore, mesopore and macropore. Its porosity is higher than 90 %. The amine groups are incorporated into the silica network via covalent bond. The porous structure and the content of amine groups can be easily changed by adjusting the synthesis condition. High mechanical property, abundant pores, high content and stable amine groups give the obtained AMSA excellent CO₂ adsorption properties. Its CO₂ adsorption capacity can reach 6.45 mmol/g in simulated ambient air under 1 bar of dry CO₂, as well as good stability over 50 adsorption–desorption cycles. Keywords Flexility Amine modification Silica aerogel CO₂ capture