Synthesis of the novel symmetric buckypaper supported ionic liquid membrane for the dehydration of ethylene glycol by pervaporation
•Synthesis of SILM by using BP as porous support to form a so-called BP-SILM.•The use of BP increase the amount of the immobilized [Bmim][BF4]–PVA.•The [Bmim][BF4] significantly improve BP-SILM pervaporation performance. In this study, a novel symmetric supported ionic liquid membrane (SILM) was pre...
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Published in | Separation and purification technology Vol. 143; pp. 135 - 145 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
25.03.2015
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Subjects | |
Online Access | Get full text |
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Summary: | •Synthesis of SILM by using BP as porous support to form a so-called BP-SILM.•The use of BP increase the amount of the immobilized [Bmim][BF4]–PVA.•The [Bmim][BF4] significantly improve BP-SILM pervaporation performance.
In this study, a novel symmetric supported ionic liquid membrane (SILM) was prepared by infiltrating 1-butyl-3-methylimidazolium tetrafluoroborate [Bmim][BF4] into a buckypaper (BP) to form a so-called buckypaper supported ionic liquid membrane (BP-SILM). The [Bmim][BF4] was blended with polyvinyl alcohol (PVA) prior to the infiltration. The role of BP as a support can effectively entrap the infiltrated [Bmim][BF4]–PVA in the interstitial pores and supply the necessary mechanical stability for the resulting BP-SILM. The BP-SILM structure, in which the membrane and support phases were merged into a single layer, was found to be different from that of conventional asymmetric membranes. The BP-SILM structure allows the formation of a thinner symmetric membrane without compromising its mechanical properties. During the application of the BP-SILM in the pervaporation process to dehydrate ethylene glycol aqueous solution, the presence of BP and [Bmim][BF4] was observed to significantly enhance the separation performance and enhance the intrinsic membrane permeability. The BP-SILM exhibited high pervaporation performance with a permeation flux of 102gm−2h−1, a separation factor as high as 1014, and a water permeance of 9046gpu. The BP-SILM also demonstrated a robust pervaporation performance over an operation of 120h. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1383-5866 1873-3794 |
DOI: | 10.1016/j.seppur.2015.01.021 |