Amine-impregnated porous nanofiber membranes for CO2 capture

Global warming is a worldwide issue, mainly caused by excessive emission of carbon dioxide (CO 2 ), thus, demands the development of robust and flexible sorbents with consider CO 2 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 CO 2 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 (PEI L ) impregnated porous nanofiber membranes offer relatively higher CO 2 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 CO 2 capture performance. This work paves the way for developing electrospun nanofiber membranes capable of efficient CO 2 adsorption.