Amine-impregnated porous nanofiber membranes for CO2 capture. (December 2018)

• Record Type: Journal Article
• Authors: Zainab, Ghazala; Babar, Aijaz Ahmed; Iqbal, Nousheen; Wang, Xianfeng; Yu, Jianyong; Ding, Bin
• Is Part Of: Composites communications. Volume 10(2018)
• Page Start: 45
• Page End: 51
• Publication Date: 2018-12
• Subjects: Electrospinning -- Nanofiber membrane -- Amine impregnation -- CO2 adsorption
• DOI: 10.1016/j.coco.2018.06.005
• Languages: English
• ISSNs: 2452-2139

Abstract

Abstract: Global warming is a worldwide issue, mainly caused by excessive emission of carbon dioxide (CO2 ), thus, demands the development of robust and flexible sorbents with consider CO2 capturing capacity. Herein, we report an easy and facile two-step fabrication of hierarchically structured and highly porous polystyrene (PS)/polyurethane (PU) electrospun nanofiber membrane impregnated with various amines for post-combustion CO2 capture. Synthesized porous nanofiber membranes have highly flexible and strong mechanical characteristics. The comparative analysis of porous membranes functionalized with three functional amines shows that low molecular weight polyethyleneimine (PEIL ) impregnated porous nanofiber membranes offer relatively higher CO2 adsorption (1.64 mmol/g) at 40 °C. In addition, optimized samples exhibit excellent regenerability, (≥ 90% of their original value) even after 19 adsorption-desorption cycles showing a stable and durable CO2 capture performance. This work paves the way for developing electrospun nanofiber membranes capable of efficient CO2 adsorption. Graphical abstract: Highlights: Synthesized PS/PU nanofiber membranes show hierarchically porous structure with a high surface area of ~62 m 2 g -1 . Effect of various amines on CO2 adsorption capacity of synthesized PS/PU membranes has been analyzed. High CO2 adsorption capacity of 1.64 mmol g -1 is achieved with optimized membranes. Excellent regenerability up to 19 adsorption-desorption cycles is achieved.