Article
Engineering, Chemical
Fadhilah Alduraiei, Priyanka Manchanda, Bruno Pulido, Gyorgy Szekely, Suzana P. Nunes
Summary: The study demonstrates that incorporating fluorinated monomers into polyamide membranes can significantly enhance their permeability and selectivity for nonpolar solvents, improving their hydrophobicity and permeance. By preparing thin-film composite membranes through reactions in organic and aqueous phases, high-performance membranes suitable for use in petroleum refining and pharmaceutical purification can be obtained.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Fadhilah Alduraiei, Sushil Kumar, Jiangtao Liu, Suzana P. Nunes, Gyorgy Szekely
Summary: Covalent organic polymers (COPs) with permanent pores are prepared via non-uniform covalent assembly of organic building blocks, making them suitable for diverse applications. In this study, a rapid synthesis route for COP-based composite membranes was demonstrated using interfacial polymerization. The membranes were prepared directly on a polyacrylonitrile substrate and exhibited good hydrophobicity. The obtained solvent-resistant composite membranes showed high toluene permeance and rejection levels for congo red.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Farzaneh Radmanesh, Gerrald Bargeman, Nieck E. Benes
Summary: In this study, cyclomatrix polyphosphazene membranes were synthesized through interfacial polymerization on alumina or polyacrylonitrile supports. The potential of alumina-supported thin film composite membranes as organic solvent nanofiltration membranes was confirmed. The resulting membranes showed high rejection rates for methylene blue in various solvents. A polyacrylonitrile-supported membrane was also prepared, showing higher permeance and lower rejection due to the presence of pinholes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Eric Ziemann, Arindam Kumar Das, Paramita Manna, Revital Sharon-Gojman, Michal Sela-Adler, Charles Linder, Roni Kasher, Roy Bernstein
Summary: This study presents a facile method to fabricate crosslinked polyethersulfone membranes with remarkable stability in organic solvents. The performance of the membranes can be easily adjusted by controlling the polymer fraction. The weeklong filtration experiment highlights the excellent stability of the membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Stefan Chisca, Valentina-Elena Musteata, Wen Zhang, Serhii Vasylevskyi, Gheorghe Falca, Edy Abou-Hamad, Abdul-Hamid Emwas, Mustafa Altunkaya, Suzana P. Nunes
Summary: This study presents a versatile strategy for fabricating polytriazole membranes with subnanometer channels and 10-nanometer-thin selective layers, which can be tuned for different applications. These membranes exhibit excellent selectivity and are capable of efficiently separating low-carbon hydrocarbon components.
Article
Engineering, Chemical
Yvonne Thiermeyer, Stefanie Blumenschein, Mirko Skiborowski
Summary: The study provides insights into the solvent-dependent rejection phenomena and the impact of solvent-membrane interactions on transport phenomena in organic solvent nanofiltration. By conducting comprehensive experimental investigations on polyimide membranes, solutes, and solvents, the results contribute to a better understanding of mass transfer through OSN membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Jing Ji, Saeed Mazinani, Ejaz Ahmed, Y. M. John Chew, Davide Mattia
Summary: Hydrophobic and chemically resistant nanofiltration (NF) polymeric membranes were fabricated with the incorporation of 2D siloxene into PVDF, achieving improved performance compared to commercial NF membranes. These membranes expand the potential applications of nanofiltration to processes requiring stable, chemically resistant, and hydrophobic characteristics.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Polymer Science
Lan Hao, Xulin Cui, Xiaoli Wu, Jingtao Wang, Yifan Li, Wenpeng Li, Xingzhong Cao, Haoqin Zhang
Summary: A novel OSN membrane was designed for efficient separation of toluene and n-heptane, achieving high selectivity and permeance with excellent long-term stability.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Chemical
Mohamed H. Abdellah, Claudia Oviedo, Gyorgy Szekely
Summary: This study investigates the effect of the degree of acetylation (DoA) on the performance of cellulose acetate (CA) membranes. It is found that decreasing the DoA improves the solvent resistance and hydrophilicity of the membranes, while maintaining excellent thermal stability. The molecular weight cut-off of the membranes can be fine-tuned by adjusting the DoA.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Ze-Xian Low, Junjie Shen
Summary: Through static aging experiments and cross-flow aging protocols, the stability of four commercial OSN membranes in different organic solvents was studied. The results showed that acetonitrile had the most significant effect on the membranes, and polyimide-based membranes exhibited signs of aging with increasing temperature. The new cross-flow aging protocol can facilitate rapid screening of OSN membranes for industrial use.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Jiahui Hu, Sushil Kumar, Rifan Hardian, Cong Yang, Gyorgy Szekely
Summary: In this study, polyamide and polyester thin-film composites (TFCs) and covalent organic frameworks (COFs) were fabricated as selective layers on a polyimide aerogel support for organic solvent nanofiltration (OSN) membranes. The polyimide aerogel support exhibited high stability and porosity, enabling high solvent flux. Both the experimental and predicted molecular weight cutoff (MWCO) values were obtained for the COFs and polyester TFC membranes. The operating temperature had minimal effect on the OSN performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Tim Croes, Abhishek Dutta, Robin De Bie, Korneel Van Aelst, Bert Sels, Bart Van der Bruggen
Summary: Organic solvent nanofiltration membranes were used to fractionate birch derived RCF lignin oil. The silicon-based membranes from Borsig and Evonik showed the best performance in separating lignin into different functional fractions, with monomer separation factors up to 7.4 and a permeate fraction with 88% phenolic monomer purity. Furthermore, batch diafiltration and two-stage filtration increased the separation factor to 25.4 and the monomer purity of the permeate to 95%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Rifan Hardian, Abdulaziz Alammar, Tibor Holtzl, Gyorgy Szekely
Summary: Membrane technologies have shown promise as an energy-efficient alternative for separation processes in various industries. This study focuses on the fabrication of oil and solvent-resistant nanofiltration membranes using cellulose and chitosan blends. The membranes exhibited outstanding separation performance and chemical stability, even in harsh solvents. By adjusting the cellulose-chitosan ratio, the molecular sieving properties of the membranes could be fine-tuned. The membranes also showed biodegradation potential, contributing to the sustainable lifecycle of membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Polymer Science
Gui Min Shi, Yingnan Feng, Bofan Li, Hui Min Tham, Juin-Yih Lai, Tai-Shung Chun
Summary: Organic solvent nanofiltration (OSN) has emerged as an energy-efficient alternative in the field of solvent separations, with the recent advances in fabrication of high-grade polymeric membranes continuously pushing the boundaries of separation performance.
PROGRESS IN POLYMER SCIENCE
(2021)
Article
Environmental Sciences
Sharafat Ali, Izaz Ali Shah, Ihsanullah Ihsanullah, Xianshe Feng
Summary: Organic solvent nanofiltration (OSN) is a promising technology for separating organic solvents in various industries. This review examines the use of nanomaterials, such as COFs, MOFs, MOs, and CBMs, in OSN membranes. The advances in nano-based OSN membranes, including TFN membranes and MMMs, are discussed, as well as the challenges and recommendations for further research in this field.
Article
Engineering, Chemical
Tian-Zhi Jia, Yong Bai, Bo-Zhi Chen, Li-Jun Zheng, Jian Chen, Yue Wang, Dan-Dan Shao, Zaiwei Zong, Jianguo Li, Xue-Li Cao, Zhen-Yuan Wang, Shi-Peng Sun
Summary: This study creatively combines precipitation and nanofiltration processes to separate phosphate and esomeprazole, resulting in a high concentration of refined esomeprazole. The hybrid process removes phosphates and potassium ions under mild operation conditions, showing great potential for application in the pharmaceutical industry.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Yue Wang, Rong-Zu Liang, Tian-Zhi Jia, Xue-Li Cao, Qian Wang, Jing-Rong Cao, Shuo Li, Qixun Shi, Lyle Isaacs, Shi-Peng Sun
Summary: This study utilizes the host-guest recognition properties of CB[7] to protect viologen derivatives and assemble them into a smart nanofiltration membrane. The resulting membrane shows improved rejection performance, recovery accuracy, and anti-fouling properties.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Chemical
Yi-Chen Wang, Wei-Jian Wang, Qian Wang, Zhen-Yuan Wang, Xiang-Yu Yan, Liu-Lin Zhao, Xue-Li Cao, Shi-Peng Sun
Summary: Organic solvent nanofiltration (OSN) is a new paradigm technology for small-molecule separation in organic solvent systems. This study successfully constructed a high-performance composite membrane by preparing solvent-resistant nanofibrous substrates and optimizing their physical properties, achieving high permeability and rejection properties.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Xiang-Yu Yan, Qian Wang, Yue Wang, Zheng-Jun Fu, Zhen-Yuan Wang, Bhekie Mamba, Shi-Peng Sun
Summary: This study presents a nanofiltration membrane for the treatment of textile wastewater, which exhibits fast and precise separation performance and self-cleaning capabilities. The membrane, prepared using a sol-gel assisted interfacial polymerization technique, possesses high water permeability and good photocatalytic properties, and remains stable during multiple fouling-irradiation cycles.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Zheng-Jun Fu, Shang-Kun Jiang, Xin-Yi Chao, Chun-Xu Zhang, Qixun Shi, Zhen-Yuan Wang, Mei-Ling Liu, Shi-Peng Sun
Summary: The treatment of wastewater containing heavy metal mixtures is crucial for human and environmental health. We have successfully integrated ion exchange and nanofiltration into a single iNF membrane, allowing for efficient removal of heavy metal ions. This integrated process is simple, scalable, and universally applicable.
Article
Engineering, Chemical
Yong Bai, Peng Gao, Rong Fang, Jing Cai, Li-Dan Zhang, Qin-Yuan He, Zi-Hao Zhou, Shi-Peng Sun, Xue-Li Cao
Summary: A positively charged acid-resistant nano filtration membrane was prepared for efficient recycling of metal ions from electroplating wastewater. The membrane showed high interception performance and improved permeability, and maintained stability in highly acidic environments.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Qian Wang, Qin-Yuan He, Liu-Lin Zhao, Yue Wang, Rong Fang, Cong Luo, Wei-Tong Lu, Hong-Ya Jiang, Shi-Peng Sun, Xue-Li Cao
Summary: This study constructed core-shell nanofibrous substrates with tunable wettability using coaxial electrospinning technology. Defect-free thin-film nanofibrous composite membranes were prepared via interfacial polymerization, and cucurbit[6]uril was embedded to enhance the solvent transport channels and improve methanol permeance. The membrane shows potential for solvent recovery in chemical and pharmaceutical fields, and provides new ideas for the design and modification of novel nanofiltration membranes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Sheng-Nan Tao, Yue Wang, Zheng-Jun Fu, Yi-Meng Wang, Qing-Lin Lu, Ming-Jian Tang, Wei-Jian Wang, Bhekie B. Mamba, Shi-Peng Sun, Zhen-Yuan Wang
Summary: An efficient NaClO activation method is developed to tailor the selective layer of cross-linked PI/PES dual-layer hollow fiber membranes, resulting in a negatively charged surface and a more open pore structure. These membranes show high separation efficiency and long-term stability for the separation of mono/divalent ions in industries.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Review
Environmental Sciences
Zhengzhong Zhou, Tian-Dan Lu, Shi-Peng Sun, Qian Wang
Summary: This article summarizes the application of coordination chemistry in nanofiltration membranes. The participation of coordination chemistry has resulted in membranes with uniform pores, better antifouling properties, and high hydrophilicity. The effects and mechanisms of coordination chemistry on membrane performance are discussed, and prospects for further advancements in nanofiltration processes are given.
Article
Biotechnology & Applied Microbiology
Long Wang, Liu-Lin Zhao, Qin-Yuan He, Dan-Dan Shao, Shi-Peng Sun, Xue-Li Cao
Summary: By constructing photocatalytic membranes based on Fe3O4-doped g-C3N4 (FeCN)/TiO2, the problem of dye adsorption on the membrane was successfully solved, and the separation efficiency and stability of the membrane were improved. This work provides new opportunities for designing high-efficiency self-cleaning membranes to solve membrane fouling based on low-cost materials.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Engineering, Chemical
Qian Chen, Lan Hong, Shang-Kun Jiang, Chun-Xu Zhang, Shan Wang, Wei-Xing Li, Shi-Peng Sun, Mei -Ling Liu
Summary: Organic solvent nanofiltration (OSN) is an effective tool for purification, concentration, and solvent exchange of high-value-added products. The introduction of a ZIF-8 interlayer can optimize the performance of OSN membranes through regulating the interfacial polymerization process. Inspired by birds' nesting processes, a fast, eco-friendly, and ordered method using PEG and ZIF precursor was developed for in-situ growth of ZIF-8, resulting in a composite membrane with enhanced stability and uniform morphology.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Liu-Lin Zhao, Xue-Li Cao, Cong Luo, Qian Wang, Tian-Dan Lu, Ming-Jian Tang, Shi-Peng Sun, Weihong Xing
Summary: A bottom-up patterning strategy of locking micron-sized carbon nanotube cages (CNCs) onto a nanofibrous substrate is developed, which enables excellent wettability and antigravity water transport. The CNCs-patterning and CB6 modification result in a high water permeability and rejection rate, surpassing that of commercial membranes by an order of magnitude, providing guidance for the design of next-generation separation membranes.
Article
Engineering, Chemical
Mei-Ling Liu, Lan Hong, Yueming Zhu, Razi Epsztein, Ting Shi, Yuanxia Sun, Zhijun Xu, Shi-Peng Sun, Weihong Xing
Summary: This study presents the fabrication of an enzyme-catalyzed nanochannel membrane with a hierarchical structure for selective and directional isomeric conversion and separation. The membrane shows high stability and retains 95% of its initial activity after multiple reaction cycles. It is found that the hierarchical layers of the membrane promote unidirectional diffusion of products and significantly increase the conversion rate of the isomerization reaction.
Article
Engineering, Chemical
Mei-Ling Liu, Yu-Xuan Sun, Ying Tang, Zheng-Jun Fu, Qian Wang, Zhen-Yuan Wang, Shi-Peng Sun
Summary: Traditional technologies for solvent/water separation are energy intensive, but state-of-the-art organic solvent nanofiltration (OSN) membranes have limited solvents discrimination ability. This study used a pressure-assisted cross-linking strategy to coat graphene oxide (GO) on hollow fiber membranes, resulting in improved stability in solvent environments. The GO layer exhibited rapid transport of acetonitrile while impeding water penetration, and the cross-linked GO hollow fiber (CGHF) membrane showed high acetonitrile permeance and the ability to concentrate dilute acetonitrile solutions. This research provides a promising prospect for energy-efficient solvent dehydration and OSN.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Dan-Dan Shao, Rong Fang, Long Wang, Yue Wang, Xue-Li Cao, Mei-Ling Liu, Xianghong Li, Shi-Peng Sun
Summary: Nanomaterial-based membranes with sub-nanometer structural precision are a research hot spot for selective separation at the molecular scale, but their complex preparation processes restrict their development. The use of dispersant-poly (maleic acid-co-acrylic acid) sodium salt (PMAS) enables the mild formation of amine-carbon quantum dots (CQDs-NH2) membrane at room temperature through interfacial polymerization. PMAS improves the deposition behavior of CQDs-NH2 particles through electric double layer formation, strengthening electrostatic forces and lowering long-range forces. The resulting membrane shows high water permeance and selective separation, making it promising for wastewater treatment and resource recovery.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
