Ultrathin graphene oxide-based hollow fiber membranes with brush-like CO2-philic agent for highly efficient CO2 capture

Fanglei Zhou, Huynh Ngoc Tien, Weiwei L. Xu, Jung-Tsai Chen, Qiuli Liu, Ethan Hicks, Mahdi Fathizadeh, Shiguang Li () and Miao Yu ()
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Fanglei Zhou: Rensselaer Polytechnic Institute
Huynh Ngoc Tien: University of South Carolina
Weiwei L. Xu: University of South Carolina
Jung-Tsai Chen: University of South Carolina
Qiuli Liu: University of South Carolina
Ethan Hicks: University of South Carolina
Mahdi Fathizadeh: University of South Carolina
Shiguang Li: Gas Technology Institute
Miao Yu: Rensselaer Polytechnic Institute

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Among the current CO2 capture technologies, membrane gas separation has many inherent advantages over other conventional techniques. However, fabricating gas separation membranes with both high CO2 permeance and high CO2/N2 selectivity, especially under wet conditions, is a challenge. In this study, sub-20-nm thick, layered graphene oxide (GO)-based hollow fiber membranes with grafted, brush-like CO2-philic agent alternating between GO layers are prepared by a facile coating process for highly efficient CO2/N2 separation under wet conditions. Piperazine, as an effective CO2-philic agent, is introduced as a carrier-brush into the GO nanochannels with chemical bonding. The membrane exhibits excellent separation performance under simulated flue gas conditions with CO2 permeance of 1,020 GPU and CO2/N2 selectivity as high as 680, demonstrating its potential for CO2 capture from flue gas. We expect this GO-based membrane structure combined with the facile coating process to facilitate the development of ultrathin GO-based membranes for CO2 capture.

Date: 2017
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DOI: 10.1038/s41467-017-02318-1

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