TY - JOUR
T1 - Helical-Ridge-Membranes from PVDF for enhanced gas–liquid mass transfer
AU - Tepper, Maik
AU - Padligur, Maria
AU - Wypysek, Denis
AU - Budeus, Laura
AU - Mueller-Dott, Jannis
AU - Roth, Hannah
AU - Wessling, Matthias
N1 - Funding Information:
This project has received funding from the European Research Council under the European Union’s Horizon 2020 research and innovation program (grant agreement no. 694946 ). This work was performed in part at the Center for Chemical Polymer Technology CPT, Germany , which is supported by the EU and the federal state of North Rhine-Westphalia (grant no. EFRE 30 00 883 02 ). M.W. acknowledges DFG funding through the Gottfried Wilhelm Leibniz Award 2019, Germany ( WE 4678/12-1 ). M. Wessling appreciates the support from the Alexander-von-Humboldt foundation, Germany . This work was enabled by a “Bruker SkyScan 1272” funded by the Major Research Instrumentation Programme, Germany ( CT: DFG-Gz: INST 2221157-1 FUGB ) as per Art. 91b GG in the Research Building NW1481006 “NGP 2 – Center for Next Generation Processes and Products”. The authors particularly thank Karin Faensen for her fine eye with SEM and CT imaging, together with Jürgen Bouge and Niklas Bouge for manufacture of spinning device parts. A central piece of this work is the contribution of our students Felix Schierling and Lukas Fehlemann.
Funding Information:
This project has received funding from the European Research Council under the European Union's Horizon 2020 research and innovation program (grant agreement no. 694946). This work was performed in part at the Center for Chemical Polymer Technology CPT, Germany, which is supported by the EU and the federal state of North Rhine-Westphalia (grant no. EFRE 30 00 883 02). M.W. acknowledges DFG funding through the Gottfried Wilhelm Leibniz Award 2019, Germany (WE 4678/12-1). M. Wessling appreciates the support from the Alexander-von-Humboldt foundation, Germany. This work was enabled by a “Bruker SkyScan 1272” funded by the Major Research Instrumentation Programme, Germany (μCT: DFG-Gz: INST 2221157-1 FUGB) as per Art. 91b GG in the Research Building NW1481006 “NGP2 – Center for Next Generation Processes and Products”. The authors particularly thank Karin Faensen for her fine eye with SEM and μCT imaging, together with Jürgen Bouge and Niklas Bouge for manufacture of spinning device parts. A central piece of this work is the contribution of our students Felix Schierling and Lukas Fehlemann.
Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/5/5
Y1 - 2023/5/5
N2 - New membrane geometries have the potential to increase mixing at the feed and permeate side to counteract concentration polarization and fouling. Such membrane geometries can be of very different architecture. Here, we address a new class of hollow fiber membranes having helical ridges. We focus on gas–liquid mass transfer, which is significantly slowed down by a liquid-side diffusion resistance. We present hydrophobic polyvinylidene fluoride (PVDF) helical ridge hollow fiber membranes produced by a rotating needle spinneret. Conceptually, the wet spinning methodology builds upon our Rotation-in-a-Spinneret platform technology, featuring customized microstructured rotating needles. The microstructured needle orifice includes two grooves to initiate ridge formation on the lumen side of the hollow fiber, while the ridges twist helically upon needle rotation. The new generation spinneret device produces hollow fiber membranes with reduced fiber diameter as compared to previous versions. It is specifically designed such that rotating spinning parameters enable an adjustable helical ridge pitch. Ridge formation and ridge shape strongly depend on rotational speed. The latter affects characteristic membrane properties such as membrane permeability and molecular selectivity. The helical ridges induce secondary flow in the lumen of the hollow fiber membranes, proven by pressure drop manipulation and experimental flow streamline visualization. In-depth analysis by flow simulation identifies rotational flow patterns as the governing flow phenomena. Ultimately, application in gas–liquid membrane contactors for oxygenation and CO2 capture revealed up to 10-fold improved transmembrane gas fluxes. Hence, the helical ridges cause turbulence promotion to introduce significant mass transfer enhancement.
AB - New membrane geometries have the potential to increase mixing at the feed and permeate side to counteract concentration polarization and fouling. Such membrane geometries can be of very different architecture. Here, we address a new class of hollow fiber membranes having helical ridges. We focus on gas–liquid mass transfer, which is significantly slowed down by a liquid-side diffusion resistance. We present hydrophobic polyvinylidene fluoride (PVDF) helical ridge hollow fiber membranes produced by a rotating needle spinneret. Conceptually, the wet spinning methodology builds upon our Rotation-in-a-Spinneret platform technology, featuring customized microstructured rotating needles. The microstructured needle orifice includes two grooves to initiate ridge formation on the lumen side of the hollow fiber, while the ridges twist helically upon needle rotation. The new generation spinneret device produces hollow fiber membranes with reduced fiber diameter as compared to previous versions. It is specifically designed such that rotating spinning parameters enable an adjustable helical ridge pitch. Ridge formation and ridge shape strongly depend on rotational speed. The latter affects characteristic membrane properties such as membrane permeability and molecular selectivity. The helical ridges induce secondary flow in the lumen of the hollow fiber membranes, proven by pressure drop manipulation and experimental flow streamline visualization. In-depth analysis by flow simulation identifies rotational flow patterns as the governing flow phenomena. Ultimately, application in gas–liquid membrane contactors for oxygenation and CO2 capture revealed up to 10-fold improved transmembrane gas fluxes. Hence, the helical ridges cause turbulence promotion to introduce significant mass transfer enhancement.
KW - 3D printing
KW - Customized microstructured spinnerets
KW - Helical-Ridge-Membranes
KW - Microstructured hollow fiber membrane fabrication
KW - Rotation-in-a-Spinneret
KW - n/a OA procedure
UR - http://www.scopus.com/inward/record.url?scp=85148025885&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2023.121471
DO - 10.1016/j.memsci.2023.121471
M3 - Article
AN - SCOPUS:85148025885
SN - 0376-7388
VL - 673
JO - Journal of membrane science
JF - Journal of membrane science
M1 - 121471
ER -
