TY - JOUR
T1 - Rotating microstructured spinnerets produce helical ridge membranes to overcome mass transfer limitations
AU - Tepper, Maik
AU - Fehlemann, Lukas
AU - Rubner, Jens
AU - Luelf, Tobias
AU - Roth, Hannah
AU - Wessling, Matthias
N1 - Funding Information:
M.W. acknowledges DFG funding through the Gottfried Wilhelm Leibniz Award 2019 (WE 4678/12-1) . M. Wessling appreciates the support from the Alexander-von-Humboldt foundation . This work was performed in part at the Center for Chemical Polymer Technology CPT, which is supported by the EU and the federal state of North Rhine-Westphalia (grant no. EFRE 30 00 883 02 ). 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 enabled by a “Bruker SkyScan 1272” funded by the Major Research Instrumentation Programme (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 and the GFE Aachen for their fine eye with SEM and CT imaging, together with Jürgen Bouge and Niklas Bouge for manufacture of spinning device parts. Heart of this work are the contributions of our students Tim Pütz, Dennis Linden, Philip Niehues, Anna Pelz, Philipp Lichtenberg and Jannis Müller-Dott. Maria Padligur and Denis Wypysek, many thanks for your valuable input and fruitful scientific discussions.
Funding Information:
M.W. acknowledges DFG funding through the Gottfried Wilhelm Leibniz Award 2019 (WE 4678/12-1). M. Wessling appreciates the support from the Alexander-von-Humboldt foundation. This work was performed in part at the Center for Chemical Polymer Technology CPT, which is supported by the EU and the federal state of North Rhine-Westphalia (grant no. EFRE 30 00 883 02). 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 enabled by a ?Bruker SkyScan 1272? funded by the Major Research Instrumentation Programme (?CT: 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 and the GFE Aachen for their fine eye with SEM and ?CT imaging, together with J?rgen Bouge and Niklas Bouge for manufacture of spinning device parts. Heart of this work are the contributions of our students Tim P?tz, Dennis Linden, Philip Niehues, Anna Pelz, Philipp Lichtenberg and Jannis M?ller-Dott. Maria Padligur and Denis Wypysek, many thanks for your valuable input and fruitful scientific discussions.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/3/1
Y1 - 2022/3/1
N2 - Membrane geometry evolution boosts membrane applications to become even more sustainable, resource- and energy-efficient. This evolution is crucial as increasingly permeable membrane materials introduce the major drawback of promoting fluid resistance due to boundary layer formation. We present how to break these boundary layers with Helical Ridge Membranes produced by rotating microstructured spinnerets. 3D printing enables us to manufacture polymeric, microstructured spinnerets featuring grooved orifices. When integrating these spinnerets into a wet spinning process, microstructured hollow fiber membrane surfaces evolve. Our home-engineered spinning technology sets the spinneret in motion. Rotation twists the nascent microstructure and creates a helical ridge on the lumen side. A robust spinning process especially establishes for our novel spinneret device to rotate the needle inside the spinneret. The interplay of spinning conditions and spinneret rotation uncovers a range of producible helical ridge shapes, sizes and pitches. In addition, spinneret rotation speed affects intrinsic membrane properties, about which we derive general correlations. The helical ridges prove the manipulation of hydrodynamics inside hollow fiber membranes by inducing secondary flow. The latter enhances mass transfer to diminish boundary layers. Ultimately, a cross-flow ultrafiltration showcase reveals TMP gradients reduced by 350% and demonstrates the disruptive impact of Helical Ridge Membranes on membrane filtration.
AB - Membrane geometry evolution boosts membrane applications to become even more sustainable, resource- and energy-efficient. This evolution is crucial as increasingly permeable membrane materials introduce the major drawback of promoting fluid resistance due to boundary layer formation. We present how to break these boundary layers with Helical Ridge Membranes produced by rotating microstructured spinnerets. 3D printing enables us to manufacture polymeric, microstructured spinnerets featuring grooved orifices. When integrating these spinnerets into a wet spinning process, microstructured hollow fiber membrane surfaces evolve. Our home-engineered spinning technology sets the spinneret in motion. Rotation twists the nascent microstructure and creates a helical ridge on the lumen side. A robust spinning process especially establishes for our novel spinneret device to rotate the needle inside the spinneret. The interplay of spinning conditions and spinneret rotation uncovers a range of producible helical ridge shapes, sizes and pitches. In addition, spinneret rotation speed affects intrinsic membrane properties, about which we derive general correlations. The helical ridges prove the manipulation of hydrodynamics inside hollow fiber membranes by inducing secondary flow. The latter enhances mass transfer to diminish boundary layers. Ultimately, a cross-flow ultrafiltration showcase reveals TMP gradients reduced by 350% and demonstrates the disruptive impact of Helical Ridge Membranes on membrane filtration.
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=85118261797&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2021.119988
DO - 10.1016/j.memsci.2021.119988
M3 - Article
AN - SCOPUS:85118261797
SN - 0376-7388
VL - 643
JO - Journal of membrane science
JF - Journal of membrane science
M1 - 119988
ER -