Article
Engineering, Chemical
M. Mohammadifakhr, J. de Grooth, K. Trzaskus, H. D. W. Roesink, A. J. B. Kemperman
Summary: The study introduces a new method for synthesizing a hollow fiber membrane with a selective layer using polyelectrolyte complexation (PEC), and demonstrates the potential of trisodium citrate (TSC) as a draw solute for forward osmosis processes. The approach shows promise in improving osmotic performance and eliminating the challenging step of coating hollow fibers through interfacial polymerization.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Polymer Science
Jinhu Jiang, Caiyun Lu, Shiyu Shen, Qifan Deng, Bei Wang, Chunyin Shen, Yanli Wang, Liang Zhan, Gance Dai
Summary: Polyether sulfone hollow fiber membrane was prepared using nonsolvent-induced phase separation process. The air gap environment played a crucial role in the formation of membrane structure. The humidity of the air gap affected the surface pore formation and the overall structure of the membrane.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Environmental
A. A. Zinatizadeh, F. Oulad, S. Moradi, P. Mohammadi, S. Azizi, L. Sibali, M. Abdulgader
Summary: This study focuses on the fabrication of TA-BM/PES membranes with improved properties by incorporating tannic acid functionalized Boehmite nanoparticles into the membrane matrix. The modified membranes showed enhanced hydrophilicity, permeability, surface morphology, and fouling resistance compared to the naked membrane. The M2 membrane exhibited excellent performance in rejecting heavy metal ions and sulfate. Based on the findings, the TA-BM/PES nanofiltration membrane has potential for effective use in treating acid mine drainage wastewater.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Takashi Ohkame, Masafumi Shibuya, Keizo Nakagawa, Takuji Shintani, Hideto Matsuyama, Tomohisa Yoshioka
Summary: A new method was developed to prepare chemically robust thin-film composite hollow-fiber (TFC-HF) nanofiltration membranes using a dip-coating process. By utilizing a negatively charged disulfonated poly(arylene ether sulfone) random copolymer (SPN-20) as the separation layer, the membranes showed excellent rejection of Na2SO4 (>98%) and an almost 100% rejection of negatively charged dyes along with a reasonable level of pure water flux (1.0-10.3 [L.m(-2).h(-1).bar(-1)]).
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Stephan Emonds, Johannes Kamp, Robin Viermann, Anna Kalde, Hannah Roth, Matthias Wessling
Summary: Polyelectrolyte composite hollow fiber membranes have great potential in industrial nanofiltration applications. This study streamlines the fabrication process and achieves tailored selectivities and high permeances. By incorporating a polyanionic additive, the spun fibers have a positively charged lumen surface which allows for subsequent modification. The results show that this technique can create composite hollow fiber nanofiltration membranes without the need for multi-step post-treatment.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Environmental Sciences
Foad Gholami, Sirus Zinadini, Soheila Nakhjiri Kamrani, Ali Akbar Zinatizadeh, Kiumars Bahrami
Summary: The study utilized modified graphene oxide with porphyrin and palladium to create a novel antifouling membrane, resulting in improved water flux and antifouling properties. By increasing the percentage of modified graphene oxide, the membrane showed enhanced performance in fouling behavior and dye rejection.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Biochemistry & Molecular Biology
Tim Sewerin, Maria G. Elshof, Sonia Matencio, Marcel Boerrigter, Jimmy Yu, Joris de Grooth
Summary: Hollow fiber nanofiltration membranes have gained significant attention in recent years, with growing demand in the global market. The hollow fiber geometry offers advantages such as low fouling tendencies and effective hydraulic cleaning possibilities compared to traditional spiral-wound configurations. These membranes are of interest for use in municipal wastewater, drinking water processes, and industrial applications.
Article
Materials Science, Ceramics
Hong Joo Lee, Seong-Joong Kim, Yeojin Kim, Hosik Park, You-In Park, Seung Eun Nam
Summary: The study focuses on the development of nanofiltration ceramic hollow fiber membranes with improved water and organic solvent permeation performance. By simplifying the manufacturing process and using appropriate materials, the newly developed membrane has shown excellent permeability and separation properties, demonstrating potential effectiveness for organic solvent nanofiltration applications.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Muhammad Irshad Baig, Mehdi Pejman, Joshua D. Willott, Alberto Tiraferri, Wiebe M. de Vos
Summary: This research demonstrates the preparation of sustainable and functional HF membranes using the aqueous phase separation technique. By adjusting the composition of the dope solution and coagulation bath, microfiltration-type and ultrafiltration-type membranes were successfully obtained.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Chemical
Muhammad Irshad Baig, Putu Putri Indira Sari, Jiaying Li, Joshua D. Willott, Wiebe M. de Vos
Summary: This study demonstrates the preparation of APS membranes with tunable pore sizes under mild pH conditions based on the complexation of PSS and PEI in acetate buffer coagulation baths. By systematically varying the molecular weight of PEI, buffer solution pH, and concentration of cross-linking agent, the researchers were able to control and optimize membrane fabrication conditions, achieving tight nanofiltration membranes with excellent separation properties.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
Nadir Dizge, Yasin Ozay, Mohamed Boussemghoune, Mustapha Chikhi
Summary: A novel catalytic polyether sulfone coated ceramic membrane was successfully prepared for catalytic reduction of chromium (VI) to chromium(III) with a reduction rate of 96.2%. The effects of various factors on chromium reduction and permeate flux were systematically investigated, demonstrating the membrane's stability in reducing chromium(VI) concentrations to below 0.38 mg/L.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Chemical
Yu-Rou Lai, Sher Ling Lee, Yun-Ke Liou, Yi-Fan Lin, Kuo-Lun Tung
Summary: The interfacial polymerization (IP) process is widely used for nanofiltration membranes and thin film composite (TFC) membranes due to its high selectivity and flexibility. In this study, a PA TFC membrane was fabricated on an alumina hollow fiber substrate by the polyamide IP process with the addition of arginine (Arg) as an additive, leading to higher stability for the IP process of PA membranes. The membrane showed excellent retention for commercial dyes, demonstrating potential industrial application for the removal of charged dyes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Zhen-Yuan Wang, Yi-Chen Wang, Wei-Jian Wang, Sheng-Nan Tao, Ya-Feng Chen, Mengmeng Tang, Dan-Dan Shao, Weihong Xing, Shi-Peng Sun
Summary: The research simplified the design strategy of composite hollow fiber nanofiltration membranes, producing ultra-thin active layer that increased mechanical flexibility and reduced material cost, while achieving chemical transition.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
S. B. Rutten, V. L. Levering, L. Hernandez Leal, J. de Grooth, H. D. W. Roesink
Summary: To meet the increasing global water demand, local solutions, such as the reuse of greywater, are becoming more important. However, the presence of micropollutants in treated greywater effluent limits its full-scale implementation. This research evaluated the fouling effect on the performance of polyelectrolyte multilayer nanofiltration membranes and demonstrated that hollow fiber nanofiltration membranes have the potential suitability for greywater reclamation schemes.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Sayed Mohsen Hosseini, Sima Mohammadianfar, Samaneh Koudzari Farahani, Sadra Solhi
Summary: Mixed matrix polyether sulfone based-graphite nanoparticle nanofiltration membranes were prepared using the phase inversion technique. The membranes were characterized using various techniques including SEM, SOM, 3D surface analysis, water content, water contact angle, tensile strength, salt rejection, water flux, porosity, antifouling measurements, and antibacterial activity. The incorporation of graphite nanoparticles into the membrane structure had a significant effect on its structural properties. The modified membranes showed higher water flux and improved salt rejection compared to the unmodified membrane.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Sandra L. Aristizabal, Lakshmeesha Upadhyaya, Maik Tepper, Hannah Roth, Malinalli Ramirez-Martinez, Matthias Wessling, Suzana P. Nunes
Summary: In this study, an acid-resistant spinneret was fabricated using 3D printing technology, which was then used to produce high-performing hollow fibers. The hollow fiber modules showed stable filtration performance at high temperature.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Electrochemistry
Korcan Percin, Jonas Hereijgers, Nicolas Mulandi, Tom Breugelmans, Matthias Wessling
Summary: Complex geometries for electrodes pose a challenge in electrochemical applications. Slurry electrodes utilize complex flow distributors to enhance charge transfer between the current collector and slurry particles. In this study, titanium-based flow distributors produced by indirect 3D-printing were used to further improve electron transfer in vanadium redox flow applications. The titanium static mixers were coated with graphite to enhance activity for vanadium redox reactions. Heat treatment of the electrodes significantly improved anodic and cathodic current peaks, and testing in a redox flow cell showed discharge polarization of 110 mA cm(-2).
Article
Materials Science, Multidisciplinary
Lukas T. Hirschwald, Sebastian Brosch, Georg Linz, John Linkhorst, Matthias Wessling
Summary: Microfluidic systems offer advantages over classical techniques in biomedical and chemical research, allowing for rapid prototyping and parallelization on a laboratory scale. However, integrating membranes in microfluidics presents challenges in material development, membrane geometry, and integration. This study presents a durable method for anchoring free-form membranes to surfaces, enabling the fabrication of stable, multi-material microfluidic systems. The influence of membrane shape and porosity on performance indicators is also investigated, providing insights into microfluidic modules with incorporated membranes.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Green & Sustainable Science & Technology
Alexander Limper, Mojtaba Mohseni, Robert Keller, John Linkhorst, Juergen Klankermayer, Matthias Wessling
Summary: This study introduces a novel binder-free electrode, carbon nanofibers (CNFs), synthesized on nickel foam, which exhibits high electrochemical activity in generating hydrogen peroxide as well as efficient removal of micropollutants in water bodies.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Engineering, Chemical
Maik Tepper, Maria Padligur, Denis Wypysek, Laura Budeus, Jannis Mueller-Dott, Hannah Roth, Matthias Wessling
Summary: New hollow fiber membranes with helical ridges have been developed to increase mixing and counteract concentration polarization and fouling. These membranes are produced using a rotating needle spinneret and have reduced fiber diameter compared to previous versions. The helical ridges induce secondary flow, leading to improved mass transfer and significantly enhanced gas fluxes in gas-liquid membrane contactors.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Matthias Hesselmann, Hannah Minten, Tristan Geissler, Robert Gregor Keller, Andre Bardow, Matthias Wessling
Summary: Electrolyzing carbon dioxide into valuable chemicals is a promising alternative to fossil fuel-based processes. Extensive research has focused on catalysis and electrode design, but the choice of ion exchange membrane for CO2 electrolysis from an economic perspective remains an important question. Holistic process optimization reveals that CO2 electrolysis using an anion exchange membrane achieves competitive production costs for CO, outperforming cation exchange and bipolar membranes. Contrary to common belief, the CO2 pumping effect does not significantly impact the economics and instead offers an efficient means of regenerating dissociated CO2.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Engineering, Environmental
Kristina Baitalow, Niklas Koeller, Paul Bacmeister, Robert Keller, Matthias Wessling
Summary: In this study, the performance of switchable oxygen depolarized cathodes (sODC) for demand-side electrolysis was investigated by switching between different modes. The experimental results showed that sODCs have stable and high Faraday efficiency and a marginal difference in cell potential compared to conventional oxygen depolarized cathodes, demonstrating their high potential for industrial application.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Maike Wrobel, Stefanie Kriescher, Tilman Schiffer, Robert Keller, Matthias Wessling
Summary: Understanding and controlling the gas-liquid-solid interface at gas diffusion electrodes is a crucial challenge in electrochemical engineering. This study investigates the effect of high current densities on the wetting, flooding, and weeping of GDE through macroscopic experiments. The permeation of electrolyte provides valuable information about the composition inside the GDE.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Anna M. Kalde, Johannes Lohaus, Stephan Musholt, Matthias Wessling
Summary: This study systematically investigated the fouling and backwashing of anionic polystyrene particles in microfluidic structures with engineered surface charge and hydrophilicity. The results confirmed that increasing the hydrophilicity of the membrane can reduce fouling, but hydrophilicity alone is not a sufficient measure to predict particle deposition and removal behavior. Designing a hydrophilic membrane with an engineered surface charge is crucial for achieving a low-fouling membrane that can be cleaned effectively during backwashing with pure flow reversal.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Pharmacology & Pharmacy
Celine Bastard, Daniel Guenther, Jose Gerardo-Nava, Mieke Dewerchin, Peter Sprycha, Christopher Licht, Arne Lueken, Matthias Wessling, Laura De Laporte
Summary: Vasculogenesis and angiogenesis can be mimicked in vitro to maximize vascularization in 3D cell cultures through the orchestrated secretion of multiple growth factors. The study investigates the temporal influence, concentrations, and combinations of growth factors on in vitro vascularization inside hydrogels. It demonstrates that combinations of angiopoietin-1, angiopoietin-2, and PDGF-BB have the most significant effect on vascularization, and MSCs are the best supporting cells for the coculture. Furthermore, the study reveals that blood vessels align with magnetically oriented microgels and that transforming growth factor-beta can induce fibrosis and affect vessel formation.
ADVANCED THERAPEUTICS
(2023)
Article
Engineering, Chemical
Maria A. Restrepo, Johannes Kamp, Lasse Guericke, Robin Schnichels, Hannah Roth, Matthias Wessling
Summary: The modification of membranes using the Layer-by-Layer (LBL) method with polyelectrolytes has become advanced technology, but it is time consuming. This study explores a simpler one-step membrane modification using coating solutions containing both polyanions and polycations. Different coating methods are proposed: interfacial complexation (IC), diffusive desalination (DDS), and polyelectrolyte concentration (PC). The ability to produce nanofiltration membranes and in-situ functionalization of the membranes are evaluated. With PC, membranes with high MgCl 2 rejection and permeability are obtained.
JOURNAL OF MEMBRANE SCIENCE LETTERS
(2023)
Article
Engineering, Chemical
Franziska Hagemann, John Linkhorst, Hannah Roth, Matthias Wessling
Summary: Tuning the pore size distribution of hemodialysis membranes is crucial for membrane selectivity and the quality of dialysis treatment. This study presents novel data on the clearance of middle molecules and albumin loss using different dialyzers at varying flow rates. The findings provide significant insights for dialysis therapy and have broader implications for ultrafiltration membrane selectivity. The Theranova dialyzer shows the best compromise between low albumin loss and good clearances of middle molecules.
JOURNAL OF MEMBRANE SCIENCE LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Carolin Grutering, Tobias Harhues, Fabian Speen, Robert Keller, Martin Zimmermann, Peter R. Jensen, Matthias Wessling, Lars M. Blank
Summary: This study demonstrates the efficient production of enantiopure (3R)-acetoin using genetically modified Lactococcus lactis in dilute resting cell buffer, followed by electrochemical conversion to 2-butanone. The electrocatalysis using resting cell broth as the electrolyte achieved a higher 2-butanone yield compared to previous studies and synthesis from complex media fermentation supernatants.