Electrospun Nanofibrous Sorbents

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Electrospun Nanofibrous Sorbents ( electrospun-nanofibrous-sorbents )

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10 Electrospun Nanofibrous Sorbents and Membranes for Carbon Dioxide Capture 259 Fig. 10.5 Concentration effect on the electrospinning of poly(MEBIm-BF4) in 3/1 acetoni- trile/DMF. Polymer concentrations: (a) 2.5, (b) 5, (c) 6, and (d) 8 wt% (Reprinted with the permission from Chen and Elabd [42]. Copyright 2009 American Chemical Society) 6 wt% (Fig. 10.5b, c) and defect-free fibers were formed at 8 wt% (Fig. 10.5d). Due to high solution conductivities, electrospinning produces fibers approximately an order of magnitude smaller than neutral polymers at equivalent normalized solution concentrations. Although the CO2 capture performance of poly(ionic liquid) nanofibers has not been reported, we can expect that these novel nanofibrous materials will be very prospective as sorbent and membrane for CO2 separation. 10.4.4 CO2 Sequestered in Electrospun Metal Oxide Nanofibers Most of the electrospinning procedures that yield metal oxide nanofibers involve pyrolysis of a guide polymer as a final processing step. Bender and co-workers demonstrated, using diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS), that CO2 is sequestered in electrospun metal oxide nanofibers upon

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