JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Yanna Wu,Mengmeng Jia,Shuming Li,Zong Lu,Yanying Wei,Haihui Wang
Lithium extraction from salt lake is important for carbon neutrality, while obtaining both high Li + /Mg 2+ selectivity and high water permeance is still challenging. The burgeoning two-dimensional (2D) material membranes in decade show enormous potential to solve above problem due to its highly designable lamellar structure. In this work, a kind of positively charged laminated membranes using MXene nanosheets as building blocks with decoration of poly (diallyl dimethyl ammonium chloride) (PDDA) were proposed. Benefiting from the well–intercalated PDDA between MXene nanosheets, the interlayer spacing between neighboring nanosheets was greater than 2 nm, which was conductive to enhance water permeance. Simultaneously, the introduction of PDDA endowed the membrane with positive charge, which exhibited sharply improved Li + /Mg 2+ selectivity by an order of magnitude due to enhanced Donnan effect. The prepared MXene/PDDA membrane with a modification mass ratio of 1:10 exhibited high Li + /Mg 2+ selectivity of 29.3 with MgCl 2 saline solution permeance of 9.8 L m −2 h −1 ·bar −1 and pure water permeance of 32.3 L m −2 h −1 ·bar −1 , which was promising for lithium extraction. Such membrane constructing concept could be expanded to other kinds of membranes based on 2D nanosheets for effective ion sieving.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Jing Dou,Shuo Han,Saisai Lin,Zhikan Yao,Lian Hou,Lin Zhang
Enhancing the water permeation while maintaining high salt rejection of existing reverse osmosis (RO) membranes remains a considerable challenge. Herein, we proposed to introduce polymer of intrinsic microporosity, PIM-1, into the selective layer of reverse osmosis membranes to break the trade-off effect between permeability and selectivity. A water-soluble a-LPIM-1 of low-molecular-weight and hydroxyl terminals was synthesized. These designed characteristics endowed it with high solubility and reactivity. Then it was mixed with m -phenylenediamine and together served as aqueous monomer to react with organic monomer of trimesoyl chloride via interfacial polymerization. The characterization results exhibited that more “nodule” rather than “leaf” structure formed on RO membrane surface, which indicated that the introduction of the high free-volume of a-LPIM-1 with three dimensional twisted and folded structure into the selective layer effectively caused the frustrated packing between polymer chains. In virtue of this effect, even with reduced surface roughness and unchanged layer thickness, the water permeability of prepared reverse osmosis membranes increased 2.1 times to 62.8 L∙m −2 ∙h −1 with acceptable NaCl rejection of 97.6%. This attempt developed a new strategy to break the trade-off effect faced by traditional polyamide reverse osmosis membranes.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Xuewu Zhu,Zhongyue Sun,Fengxun Tan,Jianjun Zhu,Feiyong Chen,Sisi Xu,Daoji Wu,Daliang Xu,Heng Liang,Xiaoxiang Cheng
Polyester (PE) membranes with outstanding permeance and efficient dye desalination performance have become ideal for resource recovery from dye wastewater. However, further improving the performance of PE membranes remains challenging. Herein, a novel high-performance PE loose nanofiltration (LNF) membrane was fabricated via interfacial polymerization, in which nontoxic, rich in hydroxyl, large size, inexpensive, low reactivity, and biodegradable xylitol (XL) was utilized to fabricate PE films. The newly formed XL-based membrane had a hydrophilic, negatively charged, smooth, loose, and thin selective layer. The membrane was optimized by controlling the XL concentrations in the aqueous phase (0.5–2.5 wt%). The optimized membrane (XL-1.5/TMC) exhibited unprecedented water permeance (97.6 L m −2 h −1 bar −1 ) and satisfactory dye desalination performance (Congo red/Na 2 SO 4 selectivity of 259). In addition, the XL-1.5/TMC membrane showed outstanding antifouling performance and stability, which showed great potential for the large-scale application of XL-based membranes. Therefore, this new strategy for the fabrication of PE LNF membranes featuring superior performance using XL was proposed to facilitate resource recovery from dye wastewater.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
DESALINATION
·
2024
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IF 8.3
Chaowen Liang,Qingwan Wang,Zhengwei Pan,Sanchuan Yu,Doufeng Wu,Congjie Gao
Global water shortages have significantly intensified the demand for efficient and sustainable water purification technologies. Nanofiltration (NF) plays a crucial role in desalination, providing distinct advantages by removing a variety of pollutants including heavy metals and organic compounds, all while consuming minimal energy. Traditional NF membranes often struggle to balance high rejection with satisfactory permeability. This study advances NF technology by utilizing polysulfone as a durable substrate and introducing tannic acid (TA)-polyvinyl alcohol (PVA) interlayer to enhance structural robustness and functional capabilities of membranes. Through streamlined one-step coating followed by precise interfacial polymerization, this approach optimizes monomer piperazine storage and dispersion on substrate, effectively controlling its diffusion rate, resulting in a thinner polyamide (PA) layer. These strategic enhancements not only lead to a significant increase in permeability to 216.3 L·m −2 ·h −1 ·MPa −1 and an impressive rejection for Na 2 SO 4 of 99.04 % but also ensure enhanced long-term operational stability. The innovative TA-PVA interlayer sets new benchmarks for high-performance NF membranes by combining environmental friendliness with cost-effectiveness, making it ideal for large-scale industrial applications. This unique composition promotes sustainability and economic efficiency in water treatment technologies, and underscoring the vast potential for expanding the production and application of advanced NF systems.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
WATER RESEARCH
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2024
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IF 11.4
Zihui Wang,Haiping Liu,Zihan Liu,Ying Wang,Jiaxuan Yang,Langming Bai,Jinlong Wang,Han Zhang,Guibai Li,Heng Liang
Nanofiltration (NF) membranes offer tremendous potential in wastewater reuse, desalination, and resource recovery to alleviate water scarcity and environmental contamination. However, separating micropollutants and charged ions from wastewater while maintaining high water permeation remains challenging for conventional NF membranes. Customizing diffusion and interaction behavior of monomers at membrane-forming interfaces is promising for regulating interior pore structures and surface morphology properties for polyamide NF membranes, reaching efficient screening and retaining of solutes from water. In this work, photopolymerization occurred on two-phase interfaces of interfacial polymerization to modulate monomer diffusion toward reaction interfaces, accelerating reaction process and narrowing reaction area thus improving interior pore uniformity and free-volume regularity. Density distributions and interactive energies of monomers at the interface were explored to illustrate the effect of monomer diffusive behavior regulated by photopolymerization on membrane physicochemical properties and separation performance through molecular dynamics simulations. Pore size distributions were simulated to verify experimental results. Layers of nodules and rod-like structures appeared on the membrane surfaces. Membranes with interface photopolymerization exhibited a water permeability of 46.0 L· m −2 · h −1 ·bar −1 more than five-fold that of the control, with improved monovalent and multivalent ions separation. Surface photopolymerized membranes with water permeation of 26.6 L· m −2 · h −1 ·bar −1 (more than three times as high as the control) achieved excellent micropollutant and salt removal. This work provides a foundation for constructing NF membranes with specific separation functions for environmental applications.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Bin Zhao,Xingli Long,Hongli Wang,Liang Wang,Yiran Qian,Hongwei Zhang,Chenyang Yang,Zhaohui Zhang,Junjing Li,Cong Ma,Yawei Shi
In order to better disperse zeolitic imidazolate framework-8 (ZIF-8) in aqueous solution for thin film nanocomposite (TFN) membrane fabrication, hydrophilic ZIF-8 was prepared by polydopamine modification. After the interfacial polymerization (IP) reaction, PDA-ZIF-8 nanoparticles were evenly entrapped in the polyamide (PA) matrix. The as-obtained PA layer demonstrated better hydrophilicity, higher surface roughness, and less cross-linking degree. Therefore, the water permeability increased by 66 % compared to the thin film composite (TFC) membrane without nanofillers. Moreover, due to the improved compatibility of PDA-ZIF-8 as well as the stronger negatively charged membrane surface, the retention of SO 4 2− was slightly enhanced, and the retention of rhodamine B was well maintained. The hydrophilic modification of ZIF-8 by PDA was a facile method to improve its compatibility with the PA polymer, and the resultant TFN membrane demonstrated elevated water permeability without compromising its selectivity.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2018
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IF 8.097
Zhongshen Zhang,Na Li,Yonggang Sun,Hongling Yang,Xin Zhang,Yang Li,Gang Wang,Jin Zhou,Linda Zou,Zhengping Hao
Graphene-based membranes have shown great potential application prospects in many fields, especially for water purification. Except for the current relatively low salt rejection rate, another main factor restricting application of such membranes is the lack of applicable preparation processes. In this work, a facile and cost-effective method was developed that can be used to in situ fabricate a graphene oxide (GO)-based membrane inside a filtration apparatus. Novel partial reduction and cross-linking was employed to adjust the surface properties and interlayer distance of GO membranes at the subnanometer range. A simple compacting process was applied to promote the integrity and compactness of the GO-based membranes by making full use of the interfacial tensions of gas/liquid/solid, which enables the in-situ fabrication. The as-prepared PrGO membranes show good water permeability (17.2–86.5 L m–2 h–1 MPa–1), reasonable desalination rates (27.7–62.6% for NaCl and 68.4–86.1% for Na2SO4), and good rejection rates of 92.3–96.8% for methyl orange. The method is appropriate for large-scale preparation and is theoretically not restricted by the shape or texture of the basement membrane, which represents another step forward in the fabrication of GO-based membranes toward wide-ranging applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
DESALINATION
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2019
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IF 6.035
Zhao Zhang,Guodong Kang,Haijun Yu,Yan Jin,Yiming Cao
Membranes with suitable nanopores and tunable charge characteristics are highly desired for their good application prospects in specific membrane-based separations. This study focused on the synthesis of polyamide (PA) composite membranes with tunable pore size and perm-selectivity. Trimellitic anhydride chloride (TAC) with an anhydride group, was introduced as the co-reactant of trimesoyl chloride (TMC) to form PA film via interfacial polymerization with m -phenylenediamine on the surface of the polysulfone substrate membrane. Due to the chemistry character difference (the number of functional group and acylation activity) between TMC and TAC, the structure and physico-chemistry properties of the PA film could be tailored through the control of TAC concentration . As a result, the nanopore radius of the membrane varied from <0.32 to 1.14 nm, along with the improved water permeability from 2.3 to 9.8 L m −2 h −1 bar −1 and selectivity of Na 2 SO 4 /NaCl from 2.2 to 4.9. This study provided a facile and effective approach for the fabrication of tailor-made membrane with tunable nanopore and ion selectivity designed at a molecular level.
研究领域:
材料科学
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分离技术
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DOI
高影响因子
RSC Advances
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2019
·Vol. 9
·期 43
·24802-24810
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IF 3.049
Xu Zhang,Yufan Zhang,Tiecheng Wang,Zheng Fan,Guoliang Zhang
A facile controlled interfacial polymerization strategy was proposed for the synthesis of novel thin film nanocomposite (TFN) membranes for enhanced nanofiltration performance. UiO-66 nanoparticles were aminated and pre-immobilized onto a polymer substrate via polydopamine (PDA) coating to achieve a continuous and defect-free polyamide dense layer. The mediation of the PDA coating could not only enhance the structural stability of TFN nanofiltration membranes, but also improve the dispersion and anchorage of UiO-66-NH2, thus closely fixing the position of UiO-66-NH2 nanoparticles on the polymer substrate. Moreover, since the amino group (–NH2) further reacted with PDA via Michael addition or Schiff base reaction, the in situ mutual reaction reduced the nanoparticle losses significantly during the draining off of the monomer solution in the fabrication process, which effectively cut down the actual dosage. The results showed that the PDA interlayer could induce the tight attachment of the PA layer to the support, enhancing the structural stability of TFN membranes. Furthermore, the dosage of UiO-66-NH2 in the as-prepared TFN membranes could also be decreased to as low as 0.01 w/v%, which was nearly a 10–20-fold reduction in the required amount of UiO-66-NH2 for the synthesis. The fabricated TFN/UiO-66-NH2 membranes exhibited very high water permeance and competitive salt rejections in cross-flow nanofiltration, which shows the huge potential for the application of novel TFN membranes with controlled nanoparticle incorporation in industrial separation.
研究领域:
材料科学
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环境工程
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
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IF 4.326
Lan-Qian Li,Xu-Hong Liu,Yong-Jian Tang,Zhen-Liang Xu
Fully aromatic polyamide (PA) membranes have been studied as nanofiltration (NF) membranes for decades because of their good chemical stability, but most of the membranes suffered from poor permeability and high rejection for monovalent ions. In this paper, an m-phenylenediamine (MPD)-based NF membrane was prepared by alkali activation on a reverse osmosis (RO) membrane. Characterization revealed the different etching paths on RO membranes fabricated by different concentrations of monomers of interfacial polymerization. The looser PA layer of RO membrane fabricated by lower-concentration monomers was easily invaded by NaOH molecules because of the higher molecular weight cutoff of 254 Da, which resulted in the transformation of separation grade from RO to NF. At the same time, the MPD-based NF membrane exhibited superior water permeability and pH resistance compared with a PIP-based membrane, which showed a potential to realize large-scale application in practical industry settings. It also provided a facile method for the preparation of a high-performance NF membrane with good chemical stability.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2023
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IF 5.9
Zhen-Zhen Zhao,Tao Wang,Xi Zheng,Yongsheng Ren,Zhi-Ping Zhao
Metal–organic frameworks (MOFs) have attracted tremendous interest in preparing a thin-film nanocomposite (TFN) membrane. Especially, the membrane performance could be optimized by using MOFs as modifying agents, which takes advantage of their adjustable and regular pore structure, good compatibility with polymers, and superb functional designability. In this study, a tailored TFN polyamide membrane for nanofiltration was successfully fabricated via interfacial polymerization by incorporating MOF-808 into the selective layer on top of a poly(m-phenylene isophthalamide) (PMIA) substrate. An MOF-808 nanoparticle with a size of approximately 60 nm and a high specific surface area of 1666 m2·g–1 was synthesized using a two-step green method and embedded into the polyamide layer. The surface morphology of the resultant TFN membrane evolved from the nodular structure to a particle aggregation configuration with increased roughness and enhanced hydrophilicity when adding more MOF-808. In particular, the membrane prepared with 0.02 wt % MOF-808 exhibited exceptional water permeance with 17.63 LMH·bar–1 with a well-maintained Na2SO4 rejection of 97.67%, which is superior to commercial membranes and most TFN membranes reported in the literature. The molecular dynamics simulation results showed that the introduction of the MOF-808 filler can significantly enhance the mass transfer of water in the TFN membrane. In addition, the newly designed TFN membrane possessed excellent ion separation performance and superior long-time stability. The findings in this study demonstrate a strategy to regulate the membrane structure, which will provide an impetus for the MOF-based TFN membrane in water treatment and desalination applications.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Chenchen Zhang,Si Chen,Yi Zhao,Jianqiang Meng
Polybenzimidazole (PBI) has garnered significant interest in desalination due to its exceptional chemical stability and mechanical strength , but suffers from poor water permeability. In this work, different contents of hydroxylated Cucurbit [6]uril (CB [6] were added to PBI to build a “water transport channel”. The effects of CB [6] addition on the chemical structure and surface morphology were analyzed by FTIR, SEM, and Zeta potential , respectively. Based on the solution-diffusion model, the effect of CB [6] on the water/salt transport properties of PBI membranes was thoroughly investigated. The results show that appropriate CB [6] doping can enhance water sorption of PBI through the special “outer hydrophilic and inner hydrophobic cavity” structure, and boost water diffusion with the channeling effect of the hydrophobic CB [6] cavity. While the complexation between the carbonyl group in CB [6] and Na + ions slightly increased salt sorption, the specific cavity structure of CB [6] can significantly decrease salt diffusion by blocking salt ions and increasing transport path tortuosity. The cavity effect of CB [6] was further confirmed by hybridizing CB [6] with biphenylsulfonyl-substituted PBI when the cavity can be occupied. Therefore, the introduction of CB [6] improves the water/salt diffusion selectivity and then the permeability selectivity of PBI. Notably, the PBI@CB [6] membrane with a 0.25 wt% CB [6] loading exhibited a 40-fold increase in water permeability coefficient compared to pure PBI, while experiencing only a slight decrease in salt permeability coefficient, water/salt selectivity almost exceeding the empirical upper bound line of polymers. This work provides a theoretical foundation for the development of high-performance desalination membranes based on macrocyclic molecules such as CB [6].
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）