Article
Engineering, Chemical
Zhe Zhai, Xiao Wang, Yan Huang, Hao Yang, Yuchao Zhao
Summary: In this study, a surfactant-plasticizer-synergy (SPS) assisted fabrication strategy is proposed to create a high-performance polyethyleneimine (PEI) based nanofiltration (NF) membrane. The addition of surfactant SDS and plasticizer ATBC promotes the diffusion of PEI monomer, creating a positively charged membrane surface that improves the rejection of positive ions. Additionally, the plasticizer ATBC softens the polyamide film, enhancing flexibility and water transport. Compared to the original PEI-TPC membrane, the SPS-assisted membrane shows significantly higher permeance and rejection rates for various heavy metal ions. This strategy offers a simple and cost-effective approach for the fabrication of high-performance thin-film composite (TFC) membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Mohsen Moslehi
Summary: Positively charged nanofibrous nanofiltration membranes were prepared using multi-step interfacial polymerization. The membranes exhibited good performance in terms of salt rejection and flux.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Yunhao Li, Shuhao Wang, Wenyuan Wu, Haijun Yu, Ruxin Che, Guodong Kang, Yiming Cao
Summary: This study proposes a new and facile method to prepare nanofiltration membranes with positively charged surface and uniform charge distribution for extracting lithium from Salt Lake brine with high Mg2+/Li+ ratio. The fabricated membranes exhibit higher water flux, MgCl2 rejection, and LiCl/MgCl2 separation factor compared to conventional membranes, indicating their potential for lithium extraction.
JOURNAL OF MEMBRANE SCIENCE
(2022)
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
Engineering, Chemical
Ming-Bang Wu, Hao Ye, Zhi-Yuan Zhu, Guo-Tao Chen, Lu-Lin Ma, Shi-Cheng Liu, Lin Liu, Juming Yao, Zhi-Kang Xu
Summary: A new method of interfacial polymerization was reported to prepare positively-charged NF membranes with excellent Mg2+/Li+ selectivity. The surface charges and pore sizes of the polyamide-based layers can be easily adjusted by the reaction time.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Qingqing Li, Tianmeng Zhang, Zhixiang Dai, Xiangwei Xia, Jianfeng Zhang, Ping Dong
Summary: A new positively-charged polyamide nanofiltration membrane was developed by incorporating amino-functionalized Ti3C2Tx nanoparticles. The membrane showed excellent rejection of Ca2+ and Mg2+ and increased flux compared to similar membranes reported previously. The enhanced stability and fouling resistance of the membrane were attributed to its new organic-inorganic structural coupling and improved hydrophilicity.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Pengfei Li, Hongling Lan, Kuo Chen, Xiupeng Ma, Bingxin Wei, Ming Wang, Peng Li, Yingfei Hou, Q. Jason Niu
Summary: The novel positively charged aliphatic polyamide NF membrane (PEI-BTC) developed in this study shows superior physicochemical properties, higher rejection rate for MgCl2, and excellent heavy metal removal efficiency, indicating its potential for industrial applications in water softening and heavy metal removal.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Huanhuan Wu, Haoyue Zhao, Yakai Lin, Xin Liu, Lin Wang, Hong Yao, Yuanhui Tang, Lixin Yu, Haihui Wang, Xiaolin Wang
Summary: A novel thin-film nanocomposite (TFN) nanofiltration (NF) membrane was successfully prepared for recovery of Li+ from Mg/Li mixtures using polymeric amine polyethyleneimine (PEI) and monomeric amine silane coupling agent (3-diamino-methylcyclohexyl triethoxysilane, DTES). The doping of SiO2 into the polyamide network enlarged the membrane pore size, enhanced surface hydrophilicity, and reinforced surface positive charges. The optimized membranes showed improved water flux, higher selectivity, and better rejection rates compared to commercial NF membranes. This study offers a high-performance nanofiltration membrane for recovering lithium and provides a feasible strategy for industrial ion separation.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Jingguo She, Haifu Gao, Ziping Song, Le Shi, Sihua Liu, Jiahui Li, Xiaolong Lu, Chunrui Wu
Summary: This paper reports a nanofiltration membrane (NFM) with improved uniformity and dually charged separation layer, formed on a properly modified poly(vinyl chloride) (PVC) substrate by N-methylglucamine (NMG) molecules. The effect of NMG grafting on the structure and performance of PVC UF membranes and NFMs was studied. The results showed that the appropriate grafting of NMG molecules significantly improved the hydrophilicity of PVC UF membrane and enabled the formation of uniform and defect-free dually charged polyamide separation layer.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Francisco Leniz-Pizarro, Chunqing Liu, Andrew Colburn, Isabel C. Escobar, Dibakar Bhattacharyya
Summary: The study successfully created positively charged nanofiltration membranes by adding PAH, which exhibited high and stable lanthanides retentions, demonstrating the potential for high selective separation.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Ping Xu, Ralph Rolly Gonzales, Jun Hong, Kecheng Guan, Yu-Hsuan Chiao, Zhaohuan Mai, Zhan Li, Saeid Rajabzadeh, Hideto Matsuyama
Summary: A new class of polyallyl-amine (PAA)-based positively charged nanofiltration (NF) membrane was developed for efficient separation of Mg2+ and Li+. The highly hydrophilic and positively charged polyamide layer of the NF membrane, endowed by the abundant primary amine groups on the PAA molecular chain, exhibited superior Mg2+/Li+ separation ability with a high separation factor SMg2+/Li+ of 82.8 and a water permeance of 7.39 L/(m2hbar). This work provides a new potential candidate for future development of positively charged NF membranes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Zhenyi Zhao, Nanxi Di, Zhiyuan Zha, Jixiao Wang, Zhi Wang, Song Zhao
Summary: This study developed a polyamine-based NF membrane with a positively charged surface and high ion selectivity for precise ion-ion separation. The membrane shows great potential in lithium-magnesium separation and heavy metal removal, and exhibits excellent stability under continuous filtration and high operational pressure.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Xiaoxiang Cheng, Yongrui Zhang, Senlin Shao, Cunxian Lai, Daoji Wu, Jingtao Xu, Xinsheng Luo, Daliang Xu, Heng Liang, Xuewu Zhu
Summary: By employing a chitosan interlayer-assisted low-temperature interfacial polymerization and surface grafting polyethyleneimine (CIL-IP-P) strategy, a highly permeable and positively charged nanofiltration (NF) membrane with multilayer structures was successfully prepared. The membrane exhibited improved performance by increasing hydrophilicity through the chitosan interlayer and enhancing electro-positivity and specific surface area through polyethyleneimine grafting, thereby overcoming the trade-off between rejection and permeance in conventional positively charged NF membranes.
Article
Engineering, Chemical
Lan-Qian Li, Yong-Jian Tang, Zhen-Liang Xu
Summary: This study presents a new approach for preparing high-performance NF membrane with good chemical stability using ultra-low concentration monomers. The newly prepared membrane showed comparable surface smoothness, pore size distribution, and desalination performance to lab-made and commercial PIP-TMC membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Guangzhe Wang, Tao Wu, Junhui Zhao, Benbing Shi, Tianrun Gu, Runnan Zhang, Xiaoyao Wang, Roni Kasher, Yanlei Su, Zhongyi Jiang
Summary: In this study, cationic covalent organic framework (cCOF) nanosheets were used to fabricate polyamide membranes with excellent rejection for divalent ions. The cCOF nanosheets acted as a versatile regulator and an interlayer, which promoted the self-sealing and self-termination of interfacial polymerization and resulted in membranes with a dense network and small thickness. The addition of quaternary ammonium groups on the cCOF nanosheets increased the positive charges on the membranes. The resulting cCOF-PA membranes exhibited excellent rejection for divalent cations (MgCl2) through the synergistic intensification of electrostatic repulsion and size sieving, surpassing most reported polyethyleneimine-based polyamide membranes. This work highlights the significance of ionic COF materials in developing positively charged membranes for efficient ionic and molecular separations.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Jiawei Hou, Shixuan Guo, Nigel Graham, Wenzheng Yu, Kening Sun, Ting Liu
Summary: A novel 2D composite membrane based on r-HGO and MXene materials was developed, demonstrating exceptional performance for water treatment in terms of permeability, pollutant rejection, and physical stability. The optimization of preparation conditions and material proportions can result in high water flux and efficient removal of pollutants.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Retraction
Engineering, Chemical
Chang Liu, Jinghong Liu, Liang Zhu, Shanfu Tang, Huixin Xiong
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Rui Gao, Caihong Liu, Andreia F. Faria, Qiang He, Chun Yang, Jun Ma
Summary: A novel copolymer architecture has been developed to address biofouling concerns in thin-film composite (TFC) membranes by integrating anti-fouling, bactericidal, and fouling-release functions. The multifunctional membrane demonstrates promising anti-adhesive properties, self-cleaning ability, and high flux recovery rate.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alexander T. Bridge, Noah P. Wamble, Matthew S. Santoso, Joan F. Brennecke, Benny D. Freeman
Summary: This study demonstrates the reproducible preparation of high-flux defect-free asymmetric gas separation membranes using Cyrene(TM) as a majority dope formulation component. By adjusting the volume ratios of Cyrene(TM) and THF, as well as the concentrations of Matrimid(R) and the dry step time, optimal membrane performance is achieved.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alessandra Imbrogno, Han Ya Lin, Babak Minofar, Andrea Iris Schaefer
Summary: In this study, a composite nanofiber membrane containing cross-linked beta-cyclodextrin-epichlorohydrin was prepared and evaluated for the removal of steroid hormones. The results showed that the membrane had high adsorption capacity and the ability to form a specific inclusion complex interaction with the hormones, indicating its potential application in hormone removal.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Bora Shin, Jaewon Shin, Yanuar Chandra Wirasembada, Ki Young Park, Jinwoo Cho
Summary: This study develops a mathematical model to estimate the initial flux of volatile fatty acids in the direct contact membrane distillation process. It identifies the parameters affecting the flux and their relationship with pH.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi-Jui Yeh, Jr Rong Liou, Wei Lin, Kuo-Lun Tung, Wei-Hung Chiang
Summary: This study demonstrates an effective plasma engineering method to create nitrogen-doped graphene quantum dot (NGQD)-inorganic nanocomposites for tunable molecular separation. The composite materials show high separation efficiency and controllable nanopore structures, making them potentially valuable for various applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Horacio Lopez-Marques, Kristofer L. Gleason, Manuel Aguilar-Vega, Rita Sulub-Sulub, J. Ehren Eichler, Hyeonji Oh, C. Buddie Mullins, Benny D. Freeman, Manish Kumar
Summary: In this study, water transport properties in Carbon Molecular Sieve (CMS) membranes were investigated. It was found that membranes synthesized at different pyrolysis temperatures exhibited varying water permeabilities. Compared to other polymeric materials, CMS membranes showed high water permeability, indicating potential for dehydration applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Dmitry A. Alentiev, Roman Yu. Nikiforov, Marina A. Rudakova, Danil P. Zarezin, Maxim A. Topchiy, Andrey F. Asachenko, Nikolay A. Belov, Maxim Bermeshev
Summary: A series of new norbornene-type monomers containing linear and branched substituents were synthesized, and robust thin membranes were prepared by vinyl-addition polymerization. Gas separation performance for the synthesized polymers was evaluated, and the structure of substituent side chains was found to significantly affect gas permeability and CO2 facilitated transport.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lei Yan, Qi Zhang, Ze Zhang, Gui-Jie Li, Yi Jin, Xin-Lin Zhang, Yan-Yun Sun
Summary: In this study, a continuous, stable and fast ion transport channel was established through in-situ guided cross-linking of zinc alginate hydrogels on a porous membrane, overcoming the negative pore effect and effectively inhibiting the dendrite growth of zinc anodes and interfacial side reactions.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yuqing Zhang, Ailing Zhang, Huiyang He, Yuting Fan, Yongjiang Li, Song Wang, Sanxi Li
Summary: The Langmuir-Blodgett self-assembly process is used to create an ordered SPEEK membrane, which enhances the proton conductivity by three times compared to conventional solution casting method.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Hasan Ismaeel, David Gibson, Eleonora Ricci, Maria Grazia De Angelis
Summary: In this study, a machine learning-based group contribution method (ML-GC) was developed to predict pure polymer parameters and successfully applied to predict gas solubility and gas solubility isotherms in glassy polymeric membranes. The model showed satisfactory performance on a small dataset, but has the potential to provide more accurate predictions for a wider range of polymers as more data becomes available.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi Ji, Yu Sun, Huilin Li, Qiang Fu, Yan Zhang
Summary: Previous studies have shown that vibration- or rotation-based techniques can effectively mitigate fouling during membrane filtration. However, it is difficult to incorporate these techniques with spiral wound modules (SWMs) widely used in water and wastewater treatment. This study developed a prototype membrane system to accommodate angular vibrations with a modified SWM, and experimental results showed that applying angular vibrations can effectively control algal fouling in an SWM with lower energy consumption compared to traditional methods.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lakshmeesha Upadhayaya, Abaynesh Yihdego Gebreyohannes, Muhammad Wakil Shahzad, Usman T. Syed, Sandra L. Aristizabal, Radoslaw Gorecki, Suzana P. Nunes
Summary: Increasing temperatures worldwide pose a significant health risk, exacerbated by high humidity. Conventional air conditioners contribute heavily to carbon dioxide emissions, with dehumidification being a major factor. Membrane-based dehumidification system offers energy efficiency and non-toxic water vapor removal. This study demonstrates a membrane dehumidification system with polymeric hollow fibers coated with a green polyphenol coating, showing remarkable water vapor transport rate and selectivity. Long-term testing reveals minimal decline in vapor transport and a 4-5 times higher coefficient of performance (COP) compared to conventional dehumidifiers, making it a highly competitive, energy-saving device with reduced emissions and a smaller footprint.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Zhengzhong Zhou, Xue Zhu, Yi Yuan, Shaoqiang Wang, Xiaoshan Meng, Taoli Huhe, Qian Wang
Summary: In this study, lignin, a biomass material, was chemically modified and utilized in the interfacial polymerization process to improve the performance of nanofiltration membranes. The modified membranes showed enhanced hydrophilicity and anti-fouling properties, and the optimization of membrane pore size increased permeability. The study also demonstrated the potential application of the membranes in biogas slurry valorization.
JOURNAL OF MEMBRANE SCIENCE
(2024)