Article
Engineering, Chemical
Moritz A. Junker, Esra te Brinke, Clara M. Vall Compte, Rob G. H. Lammertink, Joris de Grooth, Wiebe M. de Vos
Summary: Polyelectrolyte multilayers (PEMs) show promise as selective layers in nanofiltration (NF) due to their simplicity, controlled layer thickness, and versatility. Combining two different PEMs in an asymmetric structure allows further optimization. This study combines experimental filtration and theoretical models to describe the effective structure of an asymmetric PEM made of PAH/PSS and PAH/PAA. The obtained membrane properties suggest a distinct layer structure, and there is a fundamental difference in the retention of salt and polyethylene glycol molecules, attributed to different exclusion mechanisms.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Fuxin Zheng, Yunkun Wang
Summary: This study presents a method for fabricating selective polyelectrolyte multilayer membranes, which can effectively remove antibiotics and extracellular resistance genes (eARGs) from wastewater. The membranes demonstrated superior antibiotics retention and excellent removal of eARGs, providing a promising solution for remediation of antimicrobial resistance in wastewater.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Materials Science, Multidisciplinary
Elif Nur Durmaz, Sevil Sahin, Ettore Virga, Sissi de Beer, Louis C. P. M. de Smet, Wiebe M. de Vos
Summary: Advanced membranes with functionalities beyond standard separation properties, such as stimuli-responsiveness, fouling control, stability, specific selectivity, sustainability, and antimicrobial activity, can play a key role in addressing global challenges such as climate change and water scarcity. Polyelectrolytes and their complexes show great promise in providing advanced membrane properties, offering a sustainable and versatile approach to membrane fabrication. This review highlights the potential of polyelectrolytes and their complexes for next-generation membranes with advanced properties, providing insight into the future of this field.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Engineering, Chemical
Moritz A. Junker, Wiebe M. de Vos, Joris de Grooth, Rob G. H. Lammertink
Summary: A novel method of making nanofiltration membranes is to use the Layer-by-Layer method, which involves coating polyelectrolytes alternately on a porous ultrafiltration membrane to form a controllable nanometer-thin separation layer known as Polyelectrolyte Multilayer (PEM). Understanding the structural properties of PEMs and their relationship to coating conditions and membrane performance is crucial for membrane optimization. In this study, the separation performance of NF PEM membranes based on different polymer systems (PDADMAC/PSS and PAH/PAA) was investigated by analyzing the structure of the membrane, particularly the pore size distribution.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Anna S. Ivanova, Alexey A. Polotsky, Alexander M. Skvortsov, Leonid I. Klushin, Friederike Schmid
Summary: A novel class of responsive uncharged polymer brushes has been proposed, where the chains forming the brush have an affinity to the substrate. Numerical calculations reveal that shorter chains are preferentially adsorbed, resulting in a reduction in the surface grafting density of the residual brush and a change in the shape of its molecular mass distribution. The effect of preferential adsorption is believed to be a fundamental property of polydisperse brushes.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Engineering, Chemical
Ettore Virga, Klara Zvab, Wiebe M. de Vos
Summary: This study investigates the effect of membrane surface chemistry on fouling in surface water treatment for polyelectrolyte multilayer based nanofiltration membranes. Different surface chemistries were found to affect the adsorption of various foulants, with zwitterionic phosphatidylcholine surface chemistry demonstrating excellent fouling resistance.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Polymer Science
Carolin Naas, Ulrich Scheler, Uwe Lappan
Summary: The growth and mobility of polyelectrolyte multilayers can be influenced by adjusting the pH value during preparation. Changes in pH lead to non-linear growth behavior and affect the formation and properties of the multilayers.
Article
Engineering, Environmental
Ryan M. DuChanois, Lauren Mazurowski, Hanqing Fan, Rafael Verduzco, Oded Nir, Menachem Elimelech
Summary: The separation of specific ions in water is essential for the recovery and reuse of metals and nutrients, but current membrane technologies lack the required precision selectivity for a circular resource economy. This study investigates whether the cation/cation selectivity of a composite cation-exchange membrane (CEM) is affected by the mass transfer resistance of the underlying CEM. The results show that eliminating resistance from the base layer of the CEM can significantly increase selectivity, highlighting the importance of low-resistance CEMs for precise separations with composite membranes.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Philipp Schroeder, Stefan Cord-Landwehr, Monika Schoenhoff, Cornelia Cramer
Summary: This study investigates the composition and charge compensation of complex coacervates of chitosan and gum arabic, depending on pH and salt concentration. The individual polyelectrolyte yields were determined using thermogravimetric analysis and enzymatic hydrolysis/HPLC-ELSD for chitosan quantification. The mass ratio of polyelectrolytes in the complex coacervate remains constant regardless of pH, with either chitosan or gum arabic charges in excess depending on pH. The amount of extrinsic charge compensation in the complex coacervate is discussed, and the doping level is found to be suitable for describing pH-induced extrinsic charge compensation in such systems.
Article
Biochemistry & Molecular Biology
Jakob Stumme, Omjothi Ashokkumar, Saskia Dillmann, Robert Niestroj-Pahl, Mathias Ernst
Summary: This study presents a theoretical approach to investigate the dominant layer buildup regime between pore-dominated vs. layer-dominated growth of polyelectrolytes on porous membranes. The data confirms that rejection for MgSO4 could only be achieved in the regime of layer-dominated film growth, and permeability values are higher at similar MgSO4 rejection rates compared to an initial pore-dominated and then layer-dominated film growth. The interaction between membrane pore size and molecular weight of the polyelectrolytes in the coating solutions plays an important role during LbL coating.
Article
Chemistry, Multidisciplinary
Zhifei Yan, Jeremy L. Hitt, Zichen Zeng, Michael A. Hickner, Thomas E. Mallouk
Summary: This study investigates the effects of local environments on ionic flows in membrane electrolysers, and demonstrates the measurement and manipulation of local pH to improve CO₂ reduction efficiency.
Article
Chemistry, Multidisciplinary
Muhammad Haseeb Iqbal, Faratiana Jeanne Rosine Revana, Emeline Pradel, Varvara Gribova, Kamel Mamchaoui, Catherine Coirault, Florent Meyer, Fouzia Boulmedais
Summary: The engineering of skeletal muscle tissue is a promising approach for the treatment of muscle injuries and diseases. In this study, a hydrogen-bonded nanofilm was developed using a brushing method to promote muscle tissue development. The nanofilm successfully guided the alignment and differentiation of muscle cells, resulting in the formation of aligned myofibers.
Article
Engineering, Chemical
Yuhua Zhang, Ziyu Zhang, Yang Tian, Zhinan Fu, Chen Hua, Li Li, Fang Zhao, Xuhong Guo
Summary: In this study, a two-step continuous flow strategy was designed to construct PS@HMEM core-shell nanoparticles in a microreactor. The structure of PS@HMEM core-shell nanoparticles was characterized and it was found that feeding through a single or two streams had a significant advantage for optimization. This work provides a new strategy for synthesizing other functional nanoparticles.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Biophysics
Charlotte Roupie, Beatrice Labat, Sandrine Morin-Grognet, Pascal Thebault, Guy Ladam
Summary: In order to prevent infections and alterations of medical devices, coatings with antiadhesive properties and antibacterial activity were developed. These coatings, composed of biocompatible polyelectrolytes and crosslinked with a natural agent, showed enhanced stability and strong antibacterial effects through immobilizing antimicrobial peptides.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Review
Polymer Science
Raul Cazorla-Luna, Araceli Martin-Illana, Fernando Notario-Perez, Roberto Ruiz-Caro, Maria-Dolores Veiga
Summary: Biopolymers have advantages such as biocompatibility, biodegradability, and adhesion to biological tissues. Polyelectrolytes formed by combining with opposite charges can be used to develop mucoadhesive dosage forms with the potential to enhance drug delivery.
Article
Nanoscience & Nanotechnology
Sampa Saha, Merlin L. Bruening, Gregory L. Baker
ACS APPLIED MATERIALS & INTERFACES
(2011)
Article
Nanoscience & Nanotechnology
Seth R. Hogg, Satish Muthu, Michael O'Callaghan, Jean-Francois Lahitte, Merlin L. Bruening
ACS APPLIED MATERIALS & INTERFACES
(2012)
Article
Chemistry, Analytical
Wei-Han Wang, Jin-Lan Dong, Gregory L. Baker, Merlin L. Bruening
Article
Chemistry, Analytical
Yu-Jing Tan, Wei-Han Wang, Yi Zheng, Jinlan Dong, Giovanni Stefano, Federica Brandizzi, R. Michael Garavito, Gavin E. Reid, Merlin L. Bruening
ANALYTICAL CHEMISTRY
(2012)
Article
Chemistry, Analytical
Yu-Jing Tan, Dexin Sui, Wei-Han Wang, Min-Hao Kuo, Gavin E. Reid, Merlin L. Bruening
ANALYTICAL CHEMISTRY
(2013)
Review
Chemistry, Multidisciplinary
Reed M. Izatt, Steven R. Izatt, Ronald L. Bruening, Neil E. Izatta, Bruce A. Moyer
CHEMICAL SOCIETY REVIEWS
(2014)
Article
Engineering, Chemical
Nishotha Anuraj, Somnath Bhattacharjee, James H. Geiger, Gregory L. Baker, Merlin L. Bruening
JOURNAL OF MEMBRANE SCIENCE
(2012)
Article
Engineering, Chemical
Andriy Yaroshchuk, Merlin L. Bruening, Edxon Eduardo Licon Bernal
JOURNAL OF MEMBRANE SCIENCE
(2013)
Article
Chemistry, Multidisciplinary
Fei Xu, James H. Geiger, Gregory L. Baker, Merlin L. Bruening
Article
Chemistry, Multidisciplinary
Somnath Bhattacharjee, Jinlan Dong, Yiding Ma, Stacy Hovde, James H. Geiger, Gregory L. Baker, Merlin L. Bruening
Article
Chemistry, Multidisciplinary
Yiding Ma, Jinlan Dong, Somnath Bhattacharjee, Salinda Wijeratne, Merlin L. Bruening, Gregory L. Baker
Article
Chemistry, Multidisciplinary
Salinda Wijeratne, Merlin L. Bruening, Gregory L. Baker
Article
Chemistry, Multidisciplinary
Jason A. Armstrong, Edxon Eduardo Licon Bernal, Andriy Yaroshchuk, Merlin L. Bruening
Article
Polymer Science
Sampa Saha, Merlin L. Bruening, Gregory L. Baker
Review
Chemistry, Multidisciplinary
Reed M. Izatt
CHEMICAL SOCIETY REVIEWS
(2017)