Chemistry in a spinneret - On the interplay of crosslinking and phase inversion during spinning of novel hollow fiber membranes

K.K. Kopec, S.M. Dutczak, Matthias Wessling, Dimitrios Stamatialis

Research output: Contribution to journalArticleAcademicpeer-review

23 Citations (Scopus)

Abstract

This work explores a new method of simultaneous membrane formation and chemical modification in a spinning process for fabricating asymmetric composite hollow fiber membranes. This method is based on controlled crosslinking reaction between the membrane forming polyimide P84 and the chemically modifying poly(ethylene imine) (PEI) dissolved in the bore liquid. We study the interplay between phase inversion and crosslinking, which determines the final morphology and chemistry of the hollow fiber membrane. Depending on the composition of chemically active bore liquid, two different types of membranes can be fabricated. The first type is a membrane with a dense, crosslinked, gas selective inner layer (thickness in the range 1.4–6.1 μm) having a mixed gas CO2/N2 selectivity 12 in the presence of water vapor. The second type is an entirely crosslinked membrane which is not soluble in NMP; it is porous (pure water flux 44.4 ± 1.2 l/(m2 bar h)) and selective for the separation of similar size proteins, bovine serum albumin (BSA) and hemoglobin (Hb), due to the charge of the membrane. The isoelectric point of the new membrane is basic (pH 9.3), much higher than that of the P84 membrane (pH 3.75). The ease of process operation (only the bore composition needs to be modified) opens new perspectives towards applications in the area of gas separation and/or liquid filtration, the latter especially in harsh solvent environments.
Original languageEnglish
Pages (from-to)308-318
JournalJournal of membrane science
Volume369
Issue number1-2
DOIs
Publication statusPublished - 2011

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crosslinking
Crosslinking
metal spinning
hollow
chemistry
inversions
membranes
Membranes
fibers
Fibers
Gases
cavities
Liquids
liquids
gases
Polyetherimides
Hemoglobin
Steam
Chemical modification
Isoelectric Point

Keywords

  • IR-77514
  • METIS-282875

Cite this

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title = "Chemistry in a spinneret - On the interplay of crosslinking and phase inversion during spinning of novel hollow fiber membranes",
abstract = "This work explores a new method of simultaneous membrane formation and chemical modification in a spinning process for fabricating asymmetric composite hollow fiber membranes. This method is based on controlled crosslinking reaction between the membrane forming polyimide P84 and the chemically modifying poly(ethylene imine) (PEI) dissolved in the bore liquid. We study the interplay between phase inversion and crosslinking, which determines the final morphology and chemistry of the hollow fiber membrane. Depending on the composition of chemically active bore liquid, two different types of membranes can be fabricated. The first type is a membrane with a dense, crosslinked, gas selective inner layer (thickness in the range 1.4–6.1 μm) having a mixed gas CO2/N2 selectivity 12 in the presence of water vapor. The second type is an entirely crosslinked membrane which is not soluble in NMP; it is porous (pure water flux 44.4 ± 1.2 l/(m2 bar h)) and selective for the separation of similar size proteins, bovine serum albumin (BSA) and hemoglobin (Hb), due to the charge of the membrane. The isoelectric point of the new membrane is basic (pH 9.3), much higher than that of the P84 membrane (pH 3.75). The ease of process operation (only the bore composition needs to be modified) opens new perspectives towards applications in the area of gas separation and/or liquid filtration, the latter especially in harsh solvent environments.",
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Chemistry in a spinneret - On the interplay of crosslinking and phase inversion during spinning of novel hollow fiber membranes. / Kopec, K.K.; Dutczak, S.M.; Wessling, Matthias; Stamatialis, Dimitrios.

In: Journal of membrane science, Vol. 369, No. 1-2, 2011, p. 308-318.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Chemistry in a spinneret - On the interplay of crosslinking and phase inversion during spinning of novel hollow fiber membranes

AU - Kopec, K.K.

AU - Dutczak, S.M.

AU - Wessling, Matthias

AU - Stamatialis, Dimitrios

PY - 2011

Y1 - 2011

N2 - This work explores a new method of simultaneous membrane formation and chemical modification in a spinning process for fabricating asymmetric composite hollow fiber membranes. This method is based on controlled crosslinking reaction between the membrane forming polyimide P84 and the chemically modifying poly(ethylene imine) (PEI) dissolved in the bore liquid. We study the interplay between phase inversion and crosslinking, which determines the final morphology and chemistry of the hollow fiber membrane. Depending on the composition of chemically active bore liquid, two different types of membranes can be fabricated. The first type is a membrane with a dense, crosslinked, gas selective inner layer (thickness in the range 1.4–6.1 μm) having a mixed gas CO2/N2 selectivity 12 in the presence of water vapor. The second type is an entirely crosslinked membrane which is not soluble in NMP; it is porous (pure water flux 44.4 ± 1.2 l/(m2 bar h)) and selective for the separation of similar size proteins, bovine serum albumin (BSA) and hemoglobin (Hb), due to the charge of the membrane. The isoelectric point of the new membrane is basic (pH 9.3), much higher than that of the P84 membrane (pH 3.75). The ease of process operation (only the bore composition needs to be modified) opens new perspectives towards applications in the area of gas separation and/or liquid filtration, the latter especially in harsh solvent environments.

AB - This work explores a new method of simultaneous membrane formation and chemical modification in a spinning process for fabricating asymmetric composite hollow fiber membranes. This method is based on controlled crosslinking reaction between the membrane forming polyimide P84 and the chemically modifying poly(ethylene imine) (PEI) dissolved in the bore liquid. We study the interplay between phase inversion and crosslinking, which determines the final morphology and chemistry of the hollow fiber membrane. Depending on the composition of chemically active bore liquid, two different types of membranes can be fabricated. The first type is a membrane with a dense, crosslinked, gas selective inner layer (thickness in the range 1.4–6.1 μm) having a mixed gas CO2/N2 selectivity 12 in the presence of water vapor. The second type is an entirely crosslinked membrane which is not soluble in NMP; it is porous (pure water flux 44.4 ± 1.2 l/(m2 bar h)) and selective for the separation of similar size proteins, bovine serum albumin (BSA) and hemoglobin (Hb), due to the charge of the membrane. The isoelectric point of the new membrane is basic (pH 9.3), much higher than that of the P84 membrane (pH 3.75). The ease of process operation (only the bore composition needs to be modified) opens new perspectives towards applications in the area of gas separation and/or liquid filtration, the latter especially in harsh solvent environments.

KW - IR-77514

KW - METIS-282875

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M3 - Article

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JO - Journal of membrane science

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SN - 0376-7388

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