Article
Chemistry, Applied
Ning Ren, Shaohuang Chen, Mei Cui, Renliang Huang, Wei Qi, Zhimin He, Rongxin Su
Summary: Ultrastrong and flame-retardant microfibers were obtained through microfluidic wet spinning of phosphorylated cellulose nanofibrils (PCNFs). The as-prepared microfibers demonstrated high mechanical properties and retained >85% strength in wet hydration state. Glycerol and egg yolk were introduced to enhance the modulus, strength, and strain to failure. The study expands the potential applications of nanocellulose microfibers in biomedical and flame-retardant materials.
CARBOHYDRATE POLYMERS
(2022)
Article
Chemistry, Applied
Li Song, Xiaolan Qiao, Jianxin Sun, Na Yi, Mengyue Wang, Zhihui Zhao, Ruyi Xie, Weichao Chen, Yanzhi Xia
Summary: Carbonized polymer dots (CPDs) with excitation-dependent-emission and biocompatibility were modified with polyethyleneimine (PEI) to achieve stable interactions with sodium alginate (SA). Alginate fibres based on PEI-CPDs (PEI-CPDs/CaALG fibres) were successfully prepared by wet-spinning for the first time. These fibres exhibited high mechanical strength, excellent thermal stability, good biocompatibility, and excitation-dependent-emission property. Anti-counterfeiting tests on textiles and papers showed higher security than existing anti-counterfeiting fibres.
CARBOHYDRATE POLYMERS
(2023)
Article
Chemistry, Applied
Archana Samanta, Oleksandr Nechyporchuk, Romain Bordesa
Summary: Incorporating phase change materials (PCM) into fibers enables the production of smart textiles with thermoregulating properties. This study demonstrates the development of strong fibers using nano-cellulose and dispersed microspheres with phase changing characteristics. The fibers exhibit good thermo-regulating features and maintain the integrity of the PCM domain sizes, while also demonstrating good washing durability and PCM leak resistance.
CARBOHYDRATE POLYMERS
(2023)
Article
Materials Science, Paper & Wood
Ji-Soo Park, Chan-Woo Park, Song-Yi Han, Eun-Ah Lee, Azelia Wulan Cindradewi, Jeong-Ki Kim, Gu-Joong Kwon, Young-Ho Seo, Won-Jae Youe, Jaegyoung Gwon, Seung-Hwan Lee
Summary: CNCs showed excellent wet-spinnability in CaCl2 solution, and the addition of AL enhanced this property. Increasing AL content led to a decrease in the average diameter of the microcomposite filament, but a deterioration in its tensile properties. Higher spinning rates resulted in improved tensile properties due to increased orientation index of CNCs.
Article
Engineering, Environmental
Chao Hui, Li-Qiang Ding, Tian-Cai Sun, Zhong Liu, Seeram Ramakrishna, Yun-Ze Long, Jun Zhang
Summary: Inspired by the Collocalia birds, we propose a technique to prepare Janus composite nanofiber membrane in one step by pouring large-particles of self-gelling powders onto nanofibers during the spinning flight path. This membrane material has strong adhesion and can gel at 5.3 seconds, without the need to wipe up the blood on the wet tissue beforehand. Compared to medical gauze and commercially available gelatin hemostatic sponges, this membrane reduces the hemostasis time to 1/5 (1.16 +/- 0.28 min) and the blood loss to 1/3 (111 +/- 11 mg). Furthermore, it has the potential for large-scale production and is expected to become a new commercially available material for hemostasis in the future.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Huanxia Zhang, Wen Wu, Hui Ma, Jianda Cao
Summary: Hollow graphene fibres were successfully fabricated using a one-step coaxial wet spinning method, resulting in a dense and highly ordered shell. These fibres exhibited excellent mechanical and electrical properties, showing potential for use in wearable flexible devices.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
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
Materials Science, Multidisciplinary
Lea Steinbeck, Dominik L. Braunmiller, Hanna J. M. Wolff, Vincent Huettche, Julia Wang, Matthias Wessling, Jerome J. Crassous, John Linkhorst
Summary: Complex-shaped microgels with active and remote orientational control have great potential in the field of soft metamaterials. This work introduces a method for spatio-temporal flow control using magnetically actuable microgels of complex shape, and demonstrates the concept in microfluidic impellers. The fabrication of these microgels is achieved through stop-flow lithography, and their magnetic response is comprehensively quantified. These complex-shaped microgels are then integrated as actuable impellers in a microfluidic chip, showcasing the versatility of the fabrication methodology.
ADVANCED MATERIALS TECHNOLOGIES
(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
Materials Science, Biomaterials
Puja Jain, Sebastian B. B. Rauer, Daniel Felder, John Linkhorst, Martin Moeller, Matthias Wessling, Smriti Singh
Summary: In this study, an in vitro pulmonary alveolar capillary barrier model is developed that closely mimics physiological functions by combining a synthetic biofunctionalized nanofibrous membrane system with a novel three-dimensional (3D)-printed bioreactor. The stimulation, which closely mimics blood circulation and breathing motion, is observed to impact alveolar endothelial cytoskeleton arrangement and improve epithelial tight junction formation as well as surfactant protein B production compared to static models. The results highlight the potential of PCL-sPEG-NCO:RGD nanofibrous scaffolds in combination with a 3D-printed bioreactor system as a platform to reconstruct and enhance in vitro models to bear a close resemblance to in vivo tissues.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Nils Weber, John Linkhorst, Robert Keller, Matthias Wessling
Summary: This study demonstrates the single-step fabrication of porous gas diffusion electrodes (GDEs) via additive manufacturing (AM). By using selective laser melting, the porosity, pore diameter, and electrochemically active surface area of the GDEs can be controlled, resulting in enhanced electrocatalytic activity for CO2 electroreduction.
ADVANCED MATERIALS TECHNOLOGIES
(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
Engineering, Chemical
Kai P. Barbian, Lukas T. Hirschwald, John Linkhorst, Michael Neidlin, Ulrich Steinseifer, Matthias Wessling, Bettina Wiegmann, Sebastian Jansen
Summary: This study aimed to develop a simplified model to predict flow distribution and gas transfer inside TPMS structures. Through a parametric study and model comparison, it was found that using artificial neural networks (NN) as a modeling strategy can accurately characterize mass transfer in TPMS structures. The developed reduced order model (ROM) demonstrated high accuracy in predicting gas transfer rates and pressure drop. The anisotropic TPMS structure showed advantages in flow distribution and gas transfer rates compared to isotropic structures.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Chemistry, Multidisciplinary
Aileen Keutgen, Ina Klein, Feng Shi, Alexander J. C. Kuehne
Summary: This study presents a novel hydrogel photoresist system for the fabrication of multifunctional microgel building blocks with high resolution. An enzymatic feedback system guides the assembly and disassembly of the building blocks along a redox gradient, offering temporal and spatial control. The work provides new perspectives for the design of mesoscopic microgels with customizable functionality and high applicability.
ADVANCED FUNCTIONAL MATERIALS
(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.