Article
Engineering, Chemical
Abedalkader Alkhouzaam, Hazim Qiblawey
Summary: Novel PSF composite UF membranes incorporating low loadings of polydopamine-functionalized graphene oxide particles were fabricated and investigated, showing improved pure water flux without affecting rejection properties. The membranes exhibited enhanced fouling resistance and are expected to have great potential in ultrafiltration and other membrane processes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
Xiao-Tong Yuan, Lei Wu, Hong-Zhang Geng, Luda Wang, Wenyi Wang, Xue-Shuang Yuan, Benqiao He, Yi-Xuan Jiang, Yu-jie Ning, Ze-Ru Zhu, Jianxin Li
Summary: Introducing polyaniline nanofibers can enhance the anti-fouling performance and tensile strength of polysulfone membranes, improving overall membrane performance. Experimental results confirm that the blended membranes exhibit significant anti-fouling properties when filtering solutions containing albumin, humic acid, and sodium alginate.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Chemical
Sakhavat Dadashov, Elif Demirel, Ender Suvaci
Summary: Incorporation of nanofillers into polymeric membranes has shown improvements in filtration characteristics. The study utilized designed MicNo (R) platelets composed of ZnO nanoparticles to create polysulfone-based ultrafiltration membranes. The results demonstrated the successful distribution of MicNo (R) powders throughout the membrane matrix, leading to improved permeance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Zhiyu Zheng, Jingwen Chen, Jiamin Wu, Min Feng, Lei Xu, Nina Yan, Hongde Xie
Summary: Functionalized biomass-based carbon nanoparticles were successfully prepared from agricultural wastes, showing excellent dispersibility and potential to improve the performance of polysulfone ultrafiltration membranes. The optimal addition of nanoparticles was found to be 0.4 wt% to avoid performance recession due to particle aggregation. These nanoparticles have the potential to enhance membrane separation performance and anti-fouling property with great simplicity and renewability.
Article
Nanoscience & Nanotechnology
Mao Xu, Qi Tang, Yuchen Liu, Jiaqi Shi, Weiyu Zhang, Chan Guo, Qiuwen Liu, Weiwei Lei, Cheng Chen
Summary: Two-dimensional nanomaterial-based membranes, such as boron nitride (BN) nanosheet membranes, have shown excellent separation performance in organic solvent nanofiltration (OSN). However, concentration polarization of organic dye pollutants hinders their adoption as a feasible technology. In this study, PDDA-modified BN (PBN) and sodium alginate-modified BN (SBN) nanosheet membranes with a thinner structure were fabricated to improve molecule separation performance. The charged PBN and SBN nanosheet membranes demonstrated stable separation capability, making them potential candidates for water and organic solvent purification.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Kanchan Sharma, Nawshad Akther, Youngwoo Choo, Pengfei Zhang, Hideto Matsuyama, Ho Kyong Shon, Gayathri Naidu
Summary: A positively charged nanofiltration membrane was fabricated to enhance the separation of Mg2+ ions over Na+ ions in seawater.
Article
Polymer Science
Murali Krishna Paidi, Veerababu Polisetti, Krishnaiah Damarla, Puyam Sobhindro Singh, Subir Kumar Mandal, Paramita Ray
Summary: In this study, mesoporous inorganic biosilica material extracted from the spent biomass of diatom was successfully used in membrane preparation, resulting in a high-performance composite membrane. The diatomite composite membranes exhibited high water permeability, hydrophilicity, and thermal stability, making them suitable for wastewater treatment and water recycling.
Article
Materials Science, Multidisciplinary
Aghil Igder, Wanling Cai, Xuan Luo, Ahmed H. M. Al-Antaki, Kasturi Vimalanathan, Alireza Keshavarz, Ataollah Nosrati, Colin L. Raston
Summary: Polysulfone ultrafiltration membranes were fabricated using a continuous flow micro-mixing process under high shear in a vortex fluidic device. The addition of graphene oxide further enhanced the permeability and rejection properties of the membranes. The vortex fluidic device processing showed shorter mixing time and resulted in membranes with higher porosity and permeability compared to conventional mixing.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Chemical
Shabab Hussain, Xinyi Wan, Zhuoyi Li, Xinsheng Peng
Summary: Incorporating porphyrin-based ultrathin, highly ordered porous photothermal responsive copper tetrakis(4-carboxyphenyl)porphyrin (Cu-TCPP) nanosheets as nanofillers into polysulfone (PSf) matrix for composite membranes enhances antifouling and antibiofouling potential, with improved separation performance and photoinduced pore tuning abilities. The Cu-TCPP/PSf composite membranes exhibit high pure water permeance, precise permeance recovery ratio, and good separation performance for 100 and 200 nm particles, making them potential candidates for water purification.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Yuefei Song, Yongxin Wang, Nan Zhang, Xifan Li, Xueshuang Bai, Tiemei Li
Summary: This study demonstrates the feasibility and effectiveness of using novel thin-film nanocomposite membranes for the efficient removal of series of cationic small-sized contaminants in aqueous solution. By doping modification, the membrane properties are significantly improved, leading to enhanced removal rates for different types of contaminants with increased membrane permeability and fouling resistance. Ultimately, the modified TFN membranes offer sustainable and efficient options for treating cationic small-sized contaminants in one step.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
Yisa Zhou, Ya Zhang, Jian Xue, Rui Wang, Zongjie Yin, Li Ding, Haihui Wang
Summary: In this study, a continuous g-C3N4-GO membrane with excellent H2 permeation performance and good stability was successfully prepared by utilizing graphene oxide nanosheets to cover and repair defects in two-dimensional graphitic carbon nitride (g-C3N4) nanosheets.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Dawei Dong, Minghua Zhang, Yafei Xiao, Zhaojie Yang, Ke Wang, Minmin Fan
Summary: In this study, QBPEI@N-GQDs were introduced into the QPSU polymer matrix to prepare QQ-n-N-GQDs composite AEMs. The composite membranes showed improved performance due to the formation of a hydrophilic/hydrophobic microphase separation structure, resulting in higher water uptake, swelling ratio, ionic conductivity, and maximum power density of single fuel cell.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Engineering, Environmental
Wenxiu Hu, Yichen Chen, Xinfei Dong, Qing-Wei Meng, Qingchun Ge
Summary: The PA-Fe-Bet membrane, designed for efficient chromium removal in low-concentration heavy metal wastewater, shows promise with its environmentally friendly synthesis approach, high CrO42- removal efficiency, and resistance to fouling.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Polymer Science
Katsiaryna S. Burts, Tatiana Plisko, Alexandr Bildyukevich, Anastasia Penkova, Svetlana A. Pratsenko
Summary: The addition of triblock copolymer Pluronic F127 and polyethylene glycol PEG-4000 to polysulfone PSF casting solution enhances membrane structure, increases membrane flux, decreases rejection rate, and improves fouling resistance. The presence of Pluronic F127 contributes to higher pressure resistance in ultrafiltration process and lower total flux decrease during ultrafiltration of bovine serum albumin solutions, surpassing the performance of PSF/PEG-4000 membranes significantly.
Article
Chemistry, Physical
Dawei Dong, Yafei Xiao, Minghua Zhang, Zhaojie Yang, Ke Wang, Minmin Fan
Summary: AEMs with regionally dense ion clusters were prepared by crosslinking QPSU with QBPEI. Among them, QPSU/QBPEI-3 AEM exhibited the best performance, with good ionic conductivity and stability at high temperature.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Polymer Science
Alexandra S. M. Wittmar, Marcus Ropertz, Michael Braun, Ulrich Hagemann, Corina Andronescu, Mathias Ulbricht
Summary: Carbon-based electrocatalysts for oxygen reduction reaction (ORR) are prepared using a two-step thermal treatment process. The nitrogen content in the catalyst can be increased by blending cellulose with chitosan. The optimized thermal treatment and pyrolysis conditions result in a catalyst with high ORR activity.
Article
Chemistry, Multidisciplinary
Md. Akhtarul Islam, Mathias Ulbricht
Summary: This study applies the Hagen-Poiseuille equation to experimental flow data of various gases through capillaries and porous media. By treating gas viscosity as an adjustable parameter, the study finds an unambiguous relationship between gas viscosity, average pressure, and capillary diameter at a constant temperature. Additionally, a universal linear relation exists for different gases between the parameter Pav*D and μ/M-0.5 (where M is molecular mass) when Pav*D < 0.01. This new interpretation of gas viscosity avoids the differentiation of flow regimes and has potential applications in fields such as microfluidic systems and pore size analysis of filters and membranes.
Article
Environmental Sciences
Yehia Manawi, Simjo Simson, Jenny Lawler, Viktor Kochkodan
Summary: In this study, the efficient removal of Mo from aqueous solutions and groundwater using carbon-derived carbon (CDC) as an adsorbent was investigated. The adsorbent was characterized by various techniques, and the effects of operational parameters on the adsorption performance were studied. The results showed that Mo adsorption onto CDC was fast and achieved high removal efficiency in a short time. The adsorption capacity was influenced by pH, and the highest adsorption capacity was achieved at pH 3. Adsorption isotherm and kinetic models were used to analyze the adsorption process, and the Freundlich isotherm and pseudo-second-order kinetic models best described the adsorption of Mo onto CDC. The main adsorption mechanisms were identified as electrostatic interactions and ligand-ligand exchange. The adsorption efficiency of CDC was stable and effective under acidic conditions, regardless of Mo concentration. Performance tests using real groundwater and spiked groundwater demonstrated the excellent removal efficiency of Mo by CDC. Regeneration tests showed that the adsorbed Mo could be easily recovered and the regenerated CDC could be reused.
Article
Biochemistry & Molecular Biology
Philipp Jahn, Michael Zelner, Viatcheslav Freger, Mathias Ulbricht
Summary: The standard treatment for wastewater is unable to remove salinity or certain organic micropollutants. Membrane processes, especially nanofiltration (NF), may be a promising solution. However, current NF membranes reject multivalent ions due to the dielectric effect. This study presents a new method that combines two polyelectrolytes with opposite charge to prepare NF membranes with adjustable selectivity and improved performance compared to existing membranes.
Article
Engineering, Environmental
Lukas Fischer, Anna Volz, Ulrich Hagemann, Mathias Ulbricht
Summary: A polymer-based membrane platform was used to immobilize nickel nanoparticles and enhance the catalytic activity for the reduction of p-nitrophenol. The optimized membrane fabrication method resulted in high loading of nickel nanoparticles, carbon nanoparticles, and cationic ionomer, as well as high porosity. The addition of carbon and ionomer improved the nickel microenvironment in the membranes and doubled the catalytic frequency of p-nitrophenol reduction. The multi-composite membranes exhibited exceptional stability and enabled continuous wastewater treatment at high p-nitrophenol concentrations.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Baiwen Ma, Mathias Ulbricht, Chengzhi Hu, Hongwei Fan, Xu Wang, Yi-Rong Pan, Seyed Saeid Hosseini, Stefan Panglisch, Bart Van der Bruggen, Zhiwei Wang
Summary: Membrane science and technology is rapidly growing worldwide, offering high separation efficiency with low energy consumption. While most research focuses on membrane fabrication and modification to enhance properties and performance, less attention has been given to membrane life cycle management, particularly at the end of service. This study highlights the importance of life cycle assessment (LCA) and specifically discusses membrane recycling to achieve green development and sustainability goals.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Polymer Science
Amir Hossein Mostafavi, Ajay Kumar Mishra, Fausto Gallucci, Jong Hak Kim, Mathias Ulbricht, Anna Maria Coclite, Seyed Saeid Hosseini
Summary: This review introduces various promising chemical and physical surface modification techniques for tailoring the characteristics of thin films and membranes. It focuses on the application of chemical vapor deposition (CVD) techniques and discusses the impact of process parameters on the quality and properties of deposition. The review highlights the significance of CVD-based membranes and thin films for industrial applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Chemical
Lukas Fischer, Sven Soren Hartmann, Artjom Maljusch, Christian Daeschlein, Oleg Prymak, Mathias Ulbricht
Summary: We fabricated dense anion-exchange membranes and rationally controlled the nanostructure by designing fabrication conditions and adding ionic liquid. We optimized the macroscopic properties and ion transport rates by tailoring the solidified membranes through heat or solvent annealing.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Duc Hoa Tran, Mathias Ulbricht
Summary: Research and development towards sustainable chemistry involves the development of new materials and exploration of new fabrication methods. In this study, composite membranes made from biodegradable cellulose were fabricated using a simple and scalable process. The use of dimethylsulfoxide as impregnation liquid improved the membrane separation performance and lamination strength. The thickness of the barrier layer could be reduced to a few micrometers, and the membrane performance could be adjusted by varying the cellulose concentration and co-solvent fraction. The cellulose-cellulose composite membranes showed potential as a sustainable alternative material for various separations.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Zhijun Ren, Siyang Wang, Qiuwen Wang, Longyi Lv, Dongyu Xu, Yilin Dong, Jinlong Han, Mathias Ulbricht, Li Sun, Xiaoyang Liu
Summary: Moderate KMnO4/Fe(II) pre-oxidation is a promising technique to alleviate membrane fouling and minimize environmental risks caused by the breakage of algae cells. This study investigates the performances of various components and their influences on fouling characteristics.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Siqi Wu, Baiwen Ma, Chengzhi Hu, Xin Hua, Hongwei Fan, Mathias Ulbricht, Jiuhui Qu
Summary: Coagulation pretreatment can improve the efficiency of membrane filtration. By regulating the 3D structure of the cake layer and the water channel characteristics, the optimization of membrane filtration can be achieved.
Article
Nanoscience & Nanotechnology
Lukas Fischer, S. Amir H. Hesaraki, Anna Volz, Mathias Ulbricht
Summary: Porous nanocomposite membranes decorated with high loadings of nickel nanoparticles were successfully fabricated using chelating additives. These additives reduced nickel agglomeration and promoted particle presentation on the membrane surface, resulting in increased water permeance and porosity compared to membranes without additives. Incorporating the hydrophobic additive Fumion allowed for tuning of membrane hydrophobicity. The same nickel nanoparticles showed improved H-2 generation rate and higher p-NP turnover frequencies when presented in membranes with higher water contact angles and additive-directed particle presentation.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Alexandra S. M. Wittmar, Thaarmikaa Vigneswaran, Nikola Rankovic, Ulrich Hagemann, Nils Hartmann, Ricardo Martinez-Hincapie, Viktor Colic, Mathias Ulbricht
Summary: Nitrogen-containing porous carbons with suitable structures and nitrogen content were prepared by pyrolysis of chitosan-coffee blends under nitrogen atmosphere and using KOH for surface activation. The fraction of chitosan in the precursor influenced the porous structure and electrochemical activity of the carbon materials. Nitrogen species derived from chitosan play an important role, with catalysts having higher pyridinic nitrogen content showing the highest faradaic efficiency. The synthesized materials showed comparable performance to commercially available carbons obtained from less renewable precursors.
Article
Materials Science, Multidisciplinary
Felix Leven, Johannes Limberg, Jessica Noll, Mathias Ulbricht, Rainer Ostermann
Summary: The synergistic combination of various sorbitol-based organogelators with polyolefins allows the preparation of porous support structures for immobilized phase change materials (PCMs). Detailed investigations were performed on the kind of polyolefin support and its mass fraction concentration in the PCM, the temperature-dependent softening and failure under superimposed load, the efficiency of heat transport and the retention capacity over several melting/solidification cycles in various measurement setups. Paraffin wax in combination with 1,2,3-trideoxy-4,6:5,7-bis-O-[(4-propylphenyl)methylene]-nonitol (TBPMN) and ultrahigh molecular weight polyethylene (UHMWPE) showed the best results in terms of high dimensional stability, low leakage, excellent processability and competitive heat capacity. The herein-established one-step preparation method saves time and energy compared to the loading of pre-formed porous supports and improves application-related properties at the same time.
MATERIALS ADVANCES
(2022)
Article
Environmental Sciences
Baiwen Ma, Chengzhi Hu, Junya Zhang, Mathias Ulbricht, Stefan Panglisch
Summary: Widespread climate change has significant implications for drinking water quality. Understanding the interplay between climate change and water quality can assist professionals in adapting and optimizing water management practices to ensure the safety of drinking water.