CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Siqi Yin,Qianqian Zhao,Yang Feng,Yan Zhang,Jie Gao,Shaolu Li,Yunxia Hu,Genghao Gong
The intensifying global water shortage highlights the need for reverse osmosis (RO) membranes combining high permeability with effective fouling resistance. Herein, we report a dual-component bulk doping strategy to fabricate high-performance polyamide (PA) RO membranes by incorporating hydrophilic tris(hydroxymethyl)aminomethane (Tris) into the aqueous phase and hydrophobic (3,3,3-trifluoropropyl) triethoxysilane (TFTS) into the organic phase during interfacial polymerization (IP). The synergistic integration of Tris and TFTS achieves a breakthrough in balancing water permeance and antifouling properties. Enhanced bidirectional monomer diffusion and controlled microporosity enable the optimized Tris-TFTS-doped PA membrane to reach 3.48 L·m −2 ·h −1 (LMH) water permeance while retaining 98.54 % NaCl rejection. TFTS reduces aqueous-organic interfacial tension, promoting larger, multilayered, vertically aligned “leaf-like” PA nanostructures with increased surface roughness. Concurrently, TFTS hydrolysis generates a low-surface-energy fluorinated siloxane (Si-O-Si) network, while Tris-derived hydroxyl groups enhance surface wettability. This unique molecular architecture confers exceptional broad-spectrum antifouling performance against cationic surfactants, anionic surfactants, proteins, humic acid, and inorganic CaSO₄ through a triple defense mechanism: electrostatic repulsion, hydration layers via hydrophilic moieties, and weakened foulant adhesion from low surface energy. This scalable, a dual-component bulk doping strategy offers a promising route for advanced RO desalination membranes.
研究领域:
膜科学
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材料化学
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环境工程
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水处理技术
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高分子化学
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表面科学
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分离科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Faizal Soyekwo,Hui Wen,Dan Liao,Changkun Liu
Selective recovery of lithium from Salt Lake brines using environmentally friendly technologies is increasingly demanded to overcome the shortage of lithium. However, satisfying high separation precision is challenging for most polymer nanofiltration membranes. Besides, bestowing high permeance together with improved membrane fouling remains a challenge for the widespread implementation of membrane processes. Herein, a new tri-quaternary ammonium-based ionic liquid (TQAIL) electrolyte monomer is synthesized and utilized for the surface modification of nascent polyamide active layer to fabricate IL-modified polyamide nanofiltration (NF) membrane for Mg 2+ /Li + separation. Molecular dynamics simulations confirm that TQAIL modification creates nanoscale structural heterogeneity leading to enhanced surface hydrophilicity and reduces internal resistance through the membrane selective layer. The TQAIL membrane exhibits improved Li + /Mg 2+ selectivity and improved water permeability of 26.11 L m −2 h −1 bar −1 , which is fourfold that of unmodified membrane accompanied with a 100-h stable continuous nanofiltration. Moreover, the membrane displays good anti-biofouling behaviour with excellent antimicrobial properties. This study offers new insights into how surface functionalization using multication side chains can remarkably improve ion separations by molecularly tuning ion-membrane electrostatic interactions in polymeric 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
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Yayu Wei,Zhe Yang,Ling Wang,Yifei Yu,Hong Yang,Hua Jin,Peng Lu,Yi Wang,Dapeng Wu,Yanshuo Li,Chuyang Y. Tang
Introduction of nanomaterials into thin–film nanocomposite (TFN) membranes can improve the solvent permeance for organic solvent reverse (OSRO) and forward osmosis (OSFO) processes. However, the severe nanomaterials aggregation and the formation of defects in membrane rejection layer, which decreased the rejection of membrane against various solutes. Herein, we proposed a novel strategy of thin–film nanocomposite (TFNi) membrane featuring an interlayer of metal–organic framework (MOF, ZIF–8) by one–step fabrication in the simultaneous phase–inversion and crosslinking process. This strategy integrates the precipitation of polyimide (PI) substrates, crosslinking between the PI and hexanediamine, and generated ZIF–8 nanocrystals through the interfacial diffusion. Furthermore, one–step strategy of ZIF–8 effectively mitigate its agglomeration in the surface of support layers by SEM characterization. A prepared polyamide (PA) rejection layer with high crosslinking and low thickness was characterized by XPS and TEM. The resulting TFNi membranes with ZIF–8 interlayer (OSFO ISG –2.5) showed a molecular weight cut–off of ~500 Da, the remarkable DI water and THF permeances (9.73 and 1.62 L m–2 h–1 bar–1 under RO mode), and the higher ethanol fluxes (2.10 ± 0.11 LMH under FO mode and 2.97 ± 0.31 LMH under PRO mode). In addition, the solvents permeance of the OSFO ISG –2.5 membrane was furtherly improved by 10 h DMF activation without loss of the polystyrene rejection in RO mode. This study also provides insight for the preparation of ZIF–8 on the polymer's matrix for large–scale production.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
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2020
·Vol. 23
·期 2
·1013-1025
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IF 9.48
Ruobin Dai,Hongyi Han,Tianlin Wang,Jiayi Li,Chuyang Y. Tang,Zhiwei Wang
The recycling of end-of-life water purification membranes is of great significance for environmental sustainability. However, only techniques for downcycling end-of-life high-pressure membranes are available. Here, we propose to upcycle fouled microfiltration membranes for fabricating new high-pressure polyamide (PA) thin-film composite membranes via interfacial polymerization (IP). A cross-linked, defect-free, and ultrathin PA active layer was formed on biopolymer-fouled substrates. In contrast to the decreased pure water permeance of substrates caused by biopolymer fouling, the upcycled membranes show excellent water permeance (∼30 L m−2 h−1 bar−1) and Na2SO4 rejection (∼95%) in nanofiltration tests for water purification. The biopolymer foulants regulate the IP process and the formation of the PA layer. Furthermore, the foulants between the PA layer and substrate can create additional channels for water transport. The PA layer formation could also be achieved on real fouled microfiltration substrates. This proof-of-concept study paves the way for upcycling fouled/end-of-life low-pressure membranes to fabricate new high-pressure membranes for water purification, forming a closed eco-loop of membrane recycling.
研究领域:
环境科学
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膜技术
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Bin Zhao,Zhiqiang Guo,Hongli Wang,Liang Wang,Yiran Qian,Xingli Long,Cong Ma,Zhaohui Zhang,Junjing Li,Hongwei Zhang
Constructing an interlayer between porous substrate and polyamide (PA) film is an effective strategy to overcome the ubiquitous trade-off between permeability and selectivity, which are both important properties for nanofiltration performance. In this study, a poly(sodium 4-styrenesulfonate) (PSS) assisted interfacial synthesis method was proposed to fabricate a zeolitic imidazolate framework-8 (ZIF-8) interlayer between the PA film and microporous poly(ether sulfone) (PES) membrane. The addition of PSS to Zn 2+ containing aqueous solution was able to stabilize the ZIF-8 layer formed at the water/ n -hexane interface and benefited the homogeneous loading of ZIF-8 on the substrate with effective coverage of the macrovoids. The surface of ZIF-8 loaded PES membrane became smoother and more negatively charged, providing improved conditions for interfacial polymerization to form a thin, loose, and defect-free PA film. The pure water permeance of the TFC membrane containing modified ZIF-8 interlayer was 9.6 L m -2 h -1 ·bar -1 , twice that of the pristine TFC membrane. Meanwhile, its rejection of sodium sulfate, rhodamine B, and acid fuchsin was well maintained. The introduction of ZIF-8 interlayer via the PSS assisted interfacial synthesis method was a promising technique to fabricate high-performance NF membrane for water treatment.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Zhiqiang Guo,Hongli Wang,Liang Wang,Bin Zhao,Yiran Qian,Hongwei Zhang
Pharmaceuticals and personal care products (PPCPs) are universally detected in natural waters, posing potential risks to drinking water safety. Nanofiltration (NF) is an advanced technology for water purification; however, its removals of PPCPs are unsatisfying, especially for hydrophobic species. In this study, the 3D architecture of nanomaterials were used to manipulate the performance the polyamide (PA) thin-film nanocomposite (TFN) membrane. In-situ addition of polyethyleneimine (PEI) successfully induced the assembly of ZIF-8 nanocrystals into star-shaped clusters (ZIF-8-PEI) due to the coordination between PEI and Zn 2+ . Together with the improved hydrophilicity, these ZIF-8-PEI clusters became excellent scaffolds for water drop retention after discretely loading onto the porous substrate. The conical protrusions of the ZIF-8-PEI clusters supported the defect-free PA film produced by the interfacial polymerization (IP), leaving big interfacial cavities underneath. These cavities worked as gutters for water transport, and the water permeance of the optimal TFN was 79% higher than that of the pristine thin-film composite (TFC) membrane. Moreover, the water impregnated cavities markedly alleviated the hydrophobic interaction between the PA film and hydrophobic PPCPs, impeding the transport of PPCPs across the membrane. Our results demonstrated the importance of the 3D architecture of nanofillers for the improving membrane performance.
研究领域:
水处理
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膜科学
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环境工程
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材料科学
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产品关联
DOI
高影响因子
DESALINATION
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2024
·
IF 8.3
Shaoxiao Liu,Enlin Wang,Wenze Wu,Baowei Su
Highly permeable hollow fiber (HF) nanofiltration (NF) membrane is strongly desired since it could achieve efficient desalination with much less energy consumption. In this study, we used 4,4′,4′′-trihydroxytriphenylmethane (TP) as an aqueous co -monomer with piperazine (PIP) to react with trimesoyl chloride (TMC) to prepare a new internally pressurized poly(amide-ester) HF NF membrane. With the incorporation of TP molecules, the synthesized poly(amide-ester) separation layer achieved larger pore size and better hydrophilicity, giving the HF NF membrane excellent water permeance. Under optimum conditions, the HF NF membrane has a water permeance of 151 L m −2 h −1 MPa −1 , which is 50 % higher than that of the control HF NF membrane, while maintaining a Na 2 SO 4 rejection of 97.5 %. Moreover, it displays excellent desalination performance towards heavy metal salt solutions and high salinity solutions. It also maintains excellent desalination performance during a long-time filtration experiment, which indicates its good durability performance. In summary, this new poly(amide-ester) HF NF membrane shows good promise for the treatment of heavy metal and high-salinity wastewaters.
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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Rongxue Li,Hongdan Wu,Yuqing Sun,Zhihui Zhou,Shiyi Wang
To overcome the limited permeance of conventional γ-Al 2 O 3 nanofiltration (NF) membranes caused by sol penetration into porous supports and poor interfacial defect control, a single-calcination fabrication strategy incorporating a PVA sacrificial interlayer was developed in this study. This approach enabled simultaneous structural optimization and performance enhancement, while also simplifying the overall fabrication process. At a PVA concentration of 3 wt% and a pre-filling time of 2 min, the average pore size of the γ-Al 2 O 3 separation layer increased from 2.04 to 2.39 nm, and the pure-water permeance improved from 8.22 to 17.68 L m −2 h −1 ·bar −1 . This enhancement is attributed to the PVA pre-filling, which effectively suppressed the infiltration of AlOOH sol into the large pores of the support and generated open micro-pores upon calcination, thereby forming a more uniform and better-connected pore structure and consequently reducing mass-transfer resistance, which contributed to a synergistic “shielding-pore-forming” effect. Owing to the optimized pore architecture and stabilized interfacial charge, the γ-Al 2 O 3 membrane exhibited high rejection of MgCl 2 (91.62 %) and CaCl 2 (86.86 %), while maintaining relatively high permeace toward NaCl and Na 2 SO 4 . This separation behavior is governed by the combined effects of size sieving and the Donnan exclusion. Long-term operation and NaClO-cleaning tests further verified that the membrane retained its structural integrity and stable separation performance. This green and facile fabrication strategy offers a practical route for the low-cost production of high-performance ceramic NF membranes and shows considerable promise for engineering-scale applications.
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产品关联
DOI
高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
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2026
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IF 7.3
Zhiquan Wang,Junchao Wang,Lu Qin,Zhen Huang,Xinxin Xu,Zhifeng Zhu,Jingjie Tang,Xiaojie Cui,Rangwei Xu,Feng Zhu,Yanping Fu,Xiuxin Deng,Quan Sun,Yunjiang Cheng
Postharvest wax coating reduces water loss and enhances visual appeal but impairs gas exchange in citrus fruit, inducing anaerobic fermentation and off-flavor development. This study demonstrates that exogenous γ-aminobutyric acid (GABA) mitigates these physiological disorders. GABA enhanced peel gas permeance by 1.7- to 2.2-fold through suppression of C25-C31 cuticular alkane biosynthesis and enlargement of stomatal apertures, thereby alleviating internal hypoxia. This metabolic shift from anaerobic fermentation toward aerobic respiration was mediated by GABA shunt reprogramming and amino acid metabolic remodeling, which reduced ethanol accumulation by 57% while preserving key flavor compounds. Transcriptomic analysis revealed coordinated regulation of genes associated with wax synthesis, fermentation, and hypoxia responses. This simple amino acid treatment preserves citrus fruit flavor and nutritional quality under waxing-induced hypoxia by mitigating physiological disorders.
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Bin Zhao,Yue Li,Min Sun,Zhaohui Zhang,Liang Wang,Jiaxue Yao
The growing concern over pharmaceutical and personal care products (PPCPs) in drinking water sources underscores a serious public health risk. Although polyamide (PA) nanofiltration (NF) membranes are highly effective at removing PPCPs, their performance for neutral and hydrophobic PPCPs requires improvement. To overcome this challenge, we fabricated a hydrophilic NF membrane containing a calcium alginate (CaAlg) hydrogel interlayer and UiO-66-NH 2 nanofillers (PA/UiO-66-NH 2 /CaAlg) to reduce membrane affinity for hydrophobic PPCPs. A fishnet-like structure was created on the membrane surface, which enhanced the effective area for filtration. Consequently, the water permeance of the PA/UiO-66-NH 2 /CaAlg membrane reached 22.7 L·m −2 ·h −1 ·bar −1 , representing an 83 % increase over the control thin-film composite (TFC) membrane. The hydrophilic CaAlg interlayer also restricted the diffusion of piperazine (PIP), thereby slowing its interfacial polymerization with trimesoyl chloride (TMC). This resulted in a highly hydrophilic PA film, evidenced by a water contact angle below 10°. The reduced adsorption of hydrophobic PPCPs on this hydrophilic surface diminished the driving force for their penetration. Furthermore, the inherent hydrophilicity of the CaAlg hydrogel interlayer suppressed the diffusion of hydrophobic PPCPs across the membrane. As a result, the removals for hydrophobic methylparaben (MP), propylparaben (PP), bisphenol A (BPA), and benzylparaben (BP) were significantly enhanced. The selectivity ( A/B ) for BPA increased by more than four times compared to that of the TFC membrane. This study demonstrates that integrating a hydrogel interlayer with MOF nanofillers offers a promising approach for developing high performance NF membranes that exhibit both improved water permeance and superior PPCP removal.
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Kai Li,Xinyue Ma,Wen Xi,Li Long,Senlin Shao
Industrial wastewater often contains significantly high concentrations of phosphorus, suggesting the potential for efficient phosphorus recovery. Nanofiltration (NF), with the ability to precisely separate different components, can be a promising strategy for this resource recovery. However, existing literature generally used the commercial polyamide NF membrane for phosphorus recovery, and demonstrated limited separation performance (e.g., low selectivity). In this regard, we developed highly selective NF membranes through interfacial polymerization (IP) with iron acetylacetonate as an additive. Compared to the control membrane, the tailored membranes showed higher water permeance up to 23.8 L m −2 h −1 bar −1 thanks to the formation of crumpled surface morphology and larger pore size of polyamide. This high permeable nature can reduce energy consumption and improve the quantity of product water for the phosphate recovery process. Additionally, the tailored membrane simultaneously demonstrated the improved phosphate rejection and the reduced fluoride rejection due to the combined effects of its enhanced surface negative charge and larger pore size of polyamide. This allowed the tailored membrane achieved significantly higher fluoride/phosphate selectivity at either single-salt or mixed-salt feed conditions. Such high selectivity values implied the potential of the tailored membrane as a promising candidate for the selective separation of phosphate from wastewater. Our findings give important implications for the development of highly selective polyamide membrane toward the selective separation and recovery of phosphorus from industrial wastewater.
研究领域:
膜科学
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环境工程
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水处理
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材料科学
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资源回收
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Xiaoying Wei,Xiaofeng Fang,Fang Li,Xuefen Wang,Zheyi Meng
Thin-film composite polyamide (TFC PA) membranes show promise for treating salt-containing dye wastewater, yet achieving high permeance alongside robust antifouling performance through straightforward fabrication remains a persistent challenge. Herein, we present a dual-scale engineering strategy that synergistically integrates molecular-level interfacial polymerization (IP) kinetics modulation with fiber-templated surface topography to address this challenge. At the molecular scale, piperazine-2-carboxylic acid (CPIP) was introduced as a bifunctional regulator to electrostatically retard monomer diffusion and attenuate aqueous-phase reactivity, thereby decelerating IP kinetics and yielding a smooth, thin (37 nm), and loosely cross-linked active layer with enlarged molecular weight cut-off (539.4 Da). At the topographical scale, an electrospun polyacrylonitrile (PAN) nanofibrous substrate imprinted sub-micron ridged topography (ridge depth ∼300 nm) onto the polyamide surface, which generated localized vortices and elevated shear stress to mitigate fouling accumulation, as validated by computational fluid dynamics (CFD) simulations. Importantly, these two scales act in a synergistic manner: CPIP-modulated interfacial polymerization promotes formation of a smoother active layer, which couples with the fiber-templated topography to enhance hydrodynamic regulation and antifouling behavior. Benefiting from this dual-scale synergy, the resulting loose nanofiltration (LNF) membrane exhibited high pure water permeance (111.6 L m −2 h −1 bar −1 , 4.1-fold enhancement), high dye rejection (Congo red, 99.5%), and low monovalent salt rejection (NaCl, 1.6%), and markedly enhanced antifouling performance compared with the flat counterpart. This study establishes a facile yet effective framework for engineering high-flux antifouling NF membranes through molecular and topographical co-optimization.
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DOI
高影响因子
危险品化学品经营许可证（带存储）