Investigation of transport and mechanical properties of hollow fiber membranes containing ionic liquids for pre-combustion carbon dioxide capture

Wickramanayake, Shan; Hopkinson, David; Myers, Christina R.; Sui, Lang; Luebke, David R.

doi:10.1016/j.memsci.2013.03.039

Cited by 26 publications

(32 citation statements)

References 20 publications

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“…In this case, the porosity was determined directly by comparing the area of dark regions (the pores) and light regions (the polymer) as reported in Ref. .…”

Section: Methodsmentioning

confidence: 99%

Preparation of polypropylene microfiltration membranes via thermally induced (solid–liquid or liquid–liquid) phase separation method

Zhou

Tang

et al. 2015

J of Applied Polymer Sci

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Polypropylene (PP) hollow fiber microfiltration membranes with excellent performance were successfully prepared from the PP‐binary diluent system via thermally induced liquid–liquid (L–L) phase separation method. The binary diluent consisted of myristic acid and diphenyl carbonate. The effects of the binary diluent on phase separation and membrane structure were systematically investigated. With the decrease in the weight ratio of myristic acid to diphenyl carbonate, the Flory–Huggins interaction parameter between PP and the binary diluent became more positive, and the mechanism of phase separation changed from solid–liquid (S–L) to L–L. This resulted in the membrane structure changing from spherulitic to bicontinuous. Moreover, as the weight ratio of myristic acid to diphenyl carbonate decreased from 11/9 to 2/3, the L–L phase separation region kept enlarging while the viscosity of the whole system became higher. The pore size of the cross‐section increased due to the longer coarsening time while the surface pore size decreased due to the higher viscosity of the system. The bulk porosity of resultant PP membranes was mostly higher than 70% and pure water flux were generally larger than 650 L m−2 h−1. In addition, the PP hollow fiber microfiltration membrane possessed excellent mechanical properties (tensile strength of 3.47 MPa and elongation of 118%) and good separation performance (rejection to PEO (Mw = 1000 kDa) of 94.6%) when the weight ratio of myristic acid to diphenyl carbonate was 2/3. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42490.

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“…In this case, the porosity was determined directly by comparing the area of dark regions (the pores) and light regions (the polymer) as reported in Ref. .…”

Section: Methodsmentioning

confidence: 99%

Preparation of polypropylene microfiltration membranes via thermally induced (solid–liquid or liquid–liquid) phase separation method

Zhou

Tang

et al. 2015

J of Applied Polymer Sci

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“…The hollow fiber pores were filled with the ionic liquid 1-hexyl-3-methylimidalzolium bis(trifluoromethylsulfonyl)imide ([C 6 mim] [Tf 2 N], from EMD Chemicals, density is 1.34 g/cm 3 , structure is shown elsewhere [4]). The chemical structures of Torlon s 4000T, and [C 6 mim][Tf 2 N] are shown elsewhere [2,4]. All of the membrane materials, solvents, non-solvents and additives were either in anhydrous form or of reagent grade.…”

Section: Methodsmentioning

confidence: 99%

“…Hollow fibers were fabricated as explained elsewhere using a single-layer spinneret at ambient conditions [2,9,10]. Syringe pumps were used to control the bore and sheath fluid flow rates at 60 and 90 mL/h, respectively, and an air gap of 2 cm was used for all experiments.…”

Section: Hollow Fiber Fabricationmentioning

confidence: 99%

“…The first fiber was untreated with ionic liquid and used as the reference. The second fiber was immersed in [C 6 mim][Tf 2 N] for 48 h in vacuum to ensure that all pores were completely filled with ionic liquid [2]. The third fiber was soaked in ionic liquid for 4 h in vacuum and subsequently dry nitrogen gas was flowed through the fiber bore at 1.5 standard liters per minute (SLPM) for 3 h in order to remove excess ionic liquid.…”

Section: Hollow Fiber Fabricationmentioning

confidence: 99%

“…Recently, some research groups have begun to develop techniques for implementing SILMs in hollow fiber format [2,3]. This opens the potential not only for building practical hollow fiber modules with large membrane surface area per unit volume, but also to take advantage of hollow fiber morphological features to reduce the selective layer thickness.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of hollow fiber supported Ionic liquid membranes using microfocus X-ray computed tomography

Dai

Seol

Wickramanayake

et al. 2015

Journal of Membrane Science

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a b s t r a c tThis work demonstrates the use of X-ray computed tomography scanning to analyze the three dimensional structure of hollow fiber supported ionic liquid membranes (SILMs). In this type of gas separation membrane, the ionic liquid (IL) acts as the gas transport media, and therefore it is important to understand the distribution of ionic liquid within the hollow fiber support. Using the X-ray computed tomography technique, it was possible to obtain high quality three dimensional images in any plane or radial orientation of the membrane. Furthermore, and more importantly, quantitative data was determined for the density distribution and the pore distribution within the hollow fiber, as well as the distribution of pores filled with ionic liquid 1-hexyl-3-methylimidalzolium bis(trifluoromethylsulfonyl) imide ([C 6 mim][Tf 2 N]). This data was used to characterize three types of hollow fibers: (a) a dry fiber, (b) a fiber that was fully saturated with ionic liquid, and (c) a fiber that was saturated with IL and subsequently treated to achieve a selective layer with reduced thickness. Scans of the final type of fiber show that ionic liquid was isolated to the mesoporous outer wall region of the fiber cross section, which demonstrates the possibility of obtaining a thin, immobilized ionic liquid selective layer.Published by Elsevier B.V.

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Ionic Liquid‐Based Membranes

Do‐Thanh

Schott

Dai

et al. 2019

Materials for Carbon Capture

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Investigation of transport and mechanical properties of hollow fiber membranes containing ionic liquids for pre-combustion carbon dioxide capture

Cited by 26 publications

References 20 publications

Preparation of polypropylene microfiltration membranes via thermally induced (solid–liquid or liquid–liquid) phase separation method

Preparation of polypropylene microfiltration membranes via thermally induced (solid–liquid or liquid–liquid) phase separation method

Characterization of hollow fiber supported Ionic liquid membranes using microfocus X-ray computed tomography

Ionic Liquid‐Based Membranes

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