Amine-functionalized polycarbosilane hybrids for CO2-selective membranes

作者：Mouline Zineb; Asai Kota; Daiko Yusuke; Honda Sawao; Bernard Samuel; Iwamoto Yuji^*

来源：Journal of the European Ceramic Society, 2017, 37(16): 5213-5221.

DOI：10.1016/j.jeurceramsoc.2017.04.008

• Carbon dioxide
• Amino silane
• Carbonaceous solid sorbents
• Hybrid materials
• Polycarbosilane
• Physisorption
• Chemisorption
• Gas separation membrane
• Facilitated transport mechanism

Commercially available polycarbosilane has been chemically modified with primary and secondary amino silane derivatives in order to provide amine-functionalized polycarbosilane as hydrophobic solid sorbent capable of reversibly capturing CO2 from flue gas streams. CO2 uptake by the samples was investigated at the molecular level using thermogravimetric analysis under CO2 atmosphere, in situ DRIFTS analysis, and CO2 sorption isotherm. The reaction paths and sorption mechanisms were examined by comparing with the CO2 adsorbing behaviors previously studied for amine-functionalized SiO2, and proven to be related to the presence of adsorbed water, as well as the nature of the grafted amino silanes. With effective CO2 adsorption rate, regeneration capacity at 40-50 degrees C, and lesser sensitivity to moist due to its hydrophobic Si-C backbone, secondary amine-functionalized polycarbosilane hybrids have potential applications in membrane gas separation through facilitated transport of CO2.

• 出版日期2017-12