2018
DOI: 10.1039/c7gc03727a
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Nafion/IL hybrid membranes with tuned nanostructure for enhanced CO2 separation: effects of ionic liquid and water vapor

Abstract: Fully hydrated hybrid membranes based on a polyelectrolyte mixed with an ionic liquid possess gas permeation properties of significant interest for CO2 capture applications.

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Cited by 64 publications
(55 citation statements)
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References 70 publications
(75 reference statements)
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“…After submersion, however, CO 2 permeability through all the membranes becomes substantially more sensitive to RH level, increasing dramatically to 291, 436, and 482 Barrer in TIPA-, THF-, and CF-cast membranes, respectively, due presumably to the formation of irregular nanoscale channels 34 that promote CO 2 diffusion. In the case of the CF-cast membranes, this increase corresponds to a permeability enhancement of ≈650% and exceeds the highest CO 2 permeability reported 35 for a polyelectrolyte (390 Barrer in Nafion ® modified with an ionic liquid at 100% RH). Even the postsubmersion membrane cast from CH exhibits a CO 2 permeability of ≈100 Barrer, thereby confirming that the submersion-induced morphological transformation that disorders most of the as-cast sample morphologies (cf.…”
Section: Resultsmentioning
confidence: 57%
“…After submersion, however, CO 2 permeability through all the membranes becomes substantially more sensitive to RH level, increasing dramatically to 291, 436, and 482 Barrer in TIPA-, THF-, and CF-cast membranes, respectively, due presumably to the formation of irregular nanoscale channels 34 that promote CO 2 diffusion. In the case of the CF-cast membranes, this increase corresponds to a permeability enhancement of ≈650% and exceeds the highest CO 2 permeability reported 35 for a polyelectrolyte (390 Barrer in Nafion ® modified with an ionic liquid at 100% RH). Even the postsubmersion membrane cast from CH exhibits a CO 2 permeability of ≈100 Barrer, thereby confirming that the submersion-induced morphological transformation that disorders most of the as-cast sample morphologies (cf.…”
Section: Resultsmentioning
confidence: 57%
“…(Figure 3d) and CH 4 ( Figure S9a, Supporting Information), whether the permeance of gases is in the form of GPU or Barrer. [24,27,28,[48][49][50][51][52][53][54][55][56][57][58] For commercially polymeric membranes, there is a trade-off between separation factor and permeability. This trade-off relationship is related to the "2008 Robeson upper bound".…”
Section: Resultsmentioning
confidence: 99%
“…Gas-separation performance was measured in a humid mixed-gas permeation setup with adjustable RH, as schematically depicted in Figure 3 . More details about the testing procedure can be found in our previous reports [ 35 , 36 ]. The RH value is controlled by using four mass flow controllers (El-Flow series, Bronkhorst, Veenendaal, Netherland).…”
Section: Methodsmentioning
confidence: 99%