JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2024
·Vol. 99
·期 12
·2693-2702
·
IF 2.8
Yandong Lu,Jiaxu Ning,Yue Zong,Fu Ding,Gaige Liu,Ruijun Zhang
BACKGROUND Tailored design of high-performance nanofiltration membranes is desirable. The physicochemical properties of the organic phaseare essential for the preparation of nanofiltration membranes. Therefore, byfine-tuning the organic phase, it is possible to achieve nanofiltrationmembranes with enhanced performance. RESULTS In this work, oleic acid, a naturally extracted fatty acid, wasintroduced into three different organic solvents (n-heptane, n-octane andisopar G) to construct special oil phases for interfacial polymerization. Testingresults showed that proper dosage of oleic acid addition can effectivelydecrease the nanofiltration membrane pore size and enhance the salt rejectionregardless of the solvent type. Taking n-octane as example, 5% oleic acidaddition in it can decrease the mean pore size from 0.500 nm to 0.341 nm and improve the MgSO 4 rejection from 52.4% to 95.5%. Further characterizationindicated that the introduction of oleic acid into organic solvent cansignificantly reduce the interfacial tension and promote the diffusion of piperazinefrom aqueous phase to the oil phase. In addition, oleic acid could react with piperazineand produce some white particles that could be embed into the polyamide layer, thus altering the surface morphology. CONCLUSION In this work, a novel modified thin film composite nanofiltration membrane was prepared by a simple and controllable oleic acid assisted interfacial polymerization strategy, which exhibits good water permeability, solute selectivity and antifouling property. Without changing the existing process, our strategy opens up a simple, environmentally friendly and operable route for the synthesis of thin film composite nanofiltration membranes. © 2024 Society of Chemical Industry (SCI).
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
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
✓ 已验证
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Houkang Pu,Hanjing Xue,Xiaojuan Wang,Huacheng Xu,Yijun Huang,Jiayan Xu,Xinyan Wang,Weizheng Zhang,Congjie Gao,Xueli Gao
The development of nanofoaming strategies presents a new avenue for designing polyamide (PA) thin film composite reverse osmosis membrane structures. However, the precise mechanism by which nanobubbles regulate the overall structure of the PA layer and the relationship between the influence on membrane structures and properties remain unclear. In this study, the PA layer structure was precisely regulated with H 2 nanobubbles based on free interfacial polymerization, and the impact of H 2 nanobubbles on the backside opening properties, internal nanovoids, and surface morphology of membranes was comprehensively analyzed. Furthermore, this strategy has been successfully extended to CO 2 and O 2 nanobubble systems. Through analyzing the robust correlation between nanovoid size and PA layer thickness in all membranes, an innovative “volcano” relationship between membrane structure and water permeance was proposed. Upon this basis, a model of nanovoid size ratio was developed and revealed that the water permeance of PA membranes increased with the increase of nanovoid size ratio. Remarkably, the H 2 -0.05 % membrane, located at the apex of the “volcano” with the highest nanovoid size ratio (0.56), exhibited outstanding water permeance (2.61 L·m −2 ·h −1 ·bar −1 ) and reasonable salt rejection (97.9 %). This study provides valuable insights into the intricate relationship between the structure and property of PA 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
·
2025
·
IF 9
Feipeng Huang,Jiancong Lu,Xinchen Xiang,Yukun Qian,Ge Li,Dan Lu,Guozhong Shi,Lin Zhang
Reverse osmosis (RO) membranes are widely recognized for their high solute rejection, yet their relatively low water flux leads to elevated energy consumption. Addressing the growing demand for water treatment across diverse salinity levels—from hypersaline brines to micro-polluted water sources—requires RO membranes with ultra-high flux (more than 100 L m −2 h −1 ) and moderate salt rejection (about 95 %), which remain scarce in current technologies. To bridge this gap, we developed a novel RO membrane by strategically regulating the interfacial polymerization process using polyethyleneimine (PEI). This approach reduces polyamide network cross-linking by limiting aqueous monomer diffusion, thereby slowing reaction kinetics and forming a thinner, more permeable selective layer. The optimized membrane achieved an exceptional water flux of 157.9 L m −2 h −1 while maintaining a NaCl rejection of 94.5 %. Structural characterization reveals enhanced hydrophilicity (water contact angle decreased from 68.8°to 35.9°), a thinner selective layer (450 nm vs. 220 nm), and reduced cross-linking degree (99.1 % vs 86.7 %.), collectively contributing to the significant flux improvement. Comparative evaluation with commercial membranes (SW30, BW30, XLE, NF90) demonstrate superior desalination efficiency, highlighting its potential for applications requiring high throughput and moderate selectivity, such as industrial wastewater reuse and drinking water treatment. This research presents a scalable strategy for tailoring the membrane separation performance, advancing energy-efficient desalination technologies.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2023
·
IF 9.9
Yuyan Hai,Xin Wen,Rui Ma,Can He,Xue Yang,Rihua Xiong,Jingyun Chen,Qiaoyi Sun
An in-situ chemical cross-linking rejuvenation technique for reverse osmosis (RO) membranes was developed and investigated utilizing pH-responsive polymer with multiple carboxyl groups to improve the salt rejection and performance stability of end-of-life RO membranes. Polyacrylic acid (PAA) was used as a rejuvenating agent to cross-link with amino groups on the degraded RO membrane through EDC/NHS activated reaction. Indicated by ATR-FTIR, XPS , Zeta potential and SEM analyses, the covalent bonds between carboxyl groups and amino groups were generated on the PAA-rejuvenated membrane. The end-of-life RO membrane elements with an average NaCl rejection of 92.68 % could be recovered to 97.26 % by PAA rejuvenation. As a result of pH responsivity , PAA-rejuvenated membranes exhibit excellent rejection stability after continuous 12 cycles of alkali and acid alternate cleaning. The adjustable salt rejection and the durability of PAA-rejuvenated membrane elements were validated in real water tests for 185 days at a coal mine water treatment plant , indicating the practical application potentiality. The effects of initial end-of-life RO membrane condition on PAA rejuvenation are also provided.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 23
·46363
·
IF 1.901
Yongli Sun,Weiguang Jin,Luhong Zhang,Na Zhang,Baoyu Wang,Bin Jiang
Thin film composite nanofiltration membranes are frequently used to remove the residual salts from industrial wastewater. However, these nanofiltration membranes often have relatively low fluxes that limit their practical applications. To solve the problem, sodium bicarbonate was introduced into the composite nanofiltration membranes via interfacial polymerization of piperazine (PIP) and 1,3,5-benzenetricarbonyl trichloride (TMC). The membrane surfaces were characterized by scanning electronic microscopy, attenuated total reflection Fourier transform infrared spectroscopy, electro kinetic analyzer, and contact angle goniometer. The results showed that the addition of sodium bicarbonate generated more tiny cracks on membrane surface and decreased the zeta potential of the membrane, which improved the permeation properties of the membrane without significantly decreasing the rejection against four kinds of salts (Na 2 SO 4 , MgSO 4 , NaCl, MgCl 2 ). The addition of sodium bicarbonate provided a new possibility to improve the permeation properties of thin film composite nanofiltration membranes. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46363.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Xiaojuan Wang,Houkang Pu,Hanjing Xue,Huacheng Xu,Yijun Huang,Xinyan Wang,Congjie Gao,Xueli Gao
The robust correlation between the performance of thin-film composite (TFC) reverse osmosis membranes and the polyamide (PA) active layer determines the necessity of precise design of the PA layer, and this regulation primarily involves the surface morphology and internal characteristics of the PA layer. In this study, we fabricated honeycomb Turing structure or nanovoid-rich TFC series membranes using polar/nonpolar organic phase additives. Characterization and simulation results confirmed that the enhancement of membrane performance relied more on the abundant nanovoids within the PA layer rather than the ordered honeycomb lattice surface. Notably, the TFC-nDCE membrane with multilayer nanovoids exhibited an approximately 89 % improvement in water permeability while maintaining satisfactory salt rejection (98.29 %). We emphasized the significant role of nanovoids in the diffusion process of amine monomers and investigated the potential relationship between nanovoids and the degree of surface cross-linking. Building upon this, a new insight into the formation of nanovoids induced by PA anisotropic growth was presented through a careful analysis of the amine monomer diffusion rate and the morphological evolution of nanovoids. The structure-property relationship between internal structures, surface morphologies, and performances was systematically and thoroughly investigated, pointing out the direction for the rational design of TFC membranes .
研究领域:
材料科学
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膜技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Zeya Li,Mingyu Zhai,Xin Wu,Zeying Chen,Lifen Liang,Xiuli Wang,Laizhou Song
The nanofiltration (NF) membrane has not been extensively competent for rejection of monovalent ions (such as Cl − and NO 3 − ), and the strategy for enhancing monovalent ion rejection and permeation flux still faces a significant challenge. Herein, based on our previous polyethersulfone (PES)-type NF membrane (NF-0), two novel NF membranes were fabricated with additional incorporations of 2,2′-benzidinedisulfonic acid (BDSA) and forward osmotic extraction solution-functioned nanoparticles (MNPs) to remove nitrate from the aqueous solution. The fabricated NF-BDSA membrane with introduction of BDSA in ultrathin layer displays a significant nitrate rejection of 92.2% and an acceptable permeation flux of 21 L m −1 h −1 at 0.6 MPa. As anticipated, the obtained NF-MNPs1.0 membrane with additional incorporation of MNPs (1.0 wt% addition) in the substrate layer of NF-BDSA membrane achieves further improvements in nitrate rejection (95%) and water permeability (32.3 L m −1 h −1 ); encouragingly, this membrane exhibits comparable monovalent ion rejection and permeation flux to reverse osmosis membrane under relatively low pressure. Compared with those of NF-0 membrane, the permeation flux and nitrate rejection of NF-MNPs1.0 membrane increase by 111.1% and 6.1%, respectively. Moreover, the superior performances of endurance, antifouling and chlorine resistance of NF-MNPs1.0 membrane demonstrate its expectable perspective of potential engineering applications.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 22
·12439-12448
·
IF 2.936
Xinxia Tian,Jian Wang,Huifeng Zhang,Zhen Cao,Man Zhao,Yipeng Guan,Yushan Zhang
Thin film nanocomposite (TFN) reverse osmosis (RO) membranes were prepared by incorporating hydrotalcite (HT) in polyamide layer during interfacial polymerization process using two methods: (1) dispersing HT in aqueous solution directly; (2) preparing layered double oxide (LDO) via calcination of HT and then dispersing the obtained LDO in aqueous solution to reconstruct HT. The results demonstrated that TFN RO membranes exhibited higher water flux compared with the pristine RO membrane, which could be mainly attributed to water channels constructed by HT as well as the enhancement of hydrophilicity and the increase of relative surface area. In addition, TFN RO membranes prepared using LDO showed higher water flux than those prepared using HT, which is contributed to the uniform distribution of water channels in polyamide layer resulting from the process of calcination and reconstruction reaction. Compared with pristine RO membrane, water flux of TFN RO membranes prepared with 0.075 wt% HT and those prepared with 0.050 wt% LDO was enhanced by 19.1% and 22.8% without sacrificing the salt rejection.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Li-Feng Fang,Ming-Yong Zhou,Liang Cheng,Bao-Ku Zhu,Hideto Matsuyama,Shuaifei Zhao
A polyvinyl chloride (PVC)-based positively-charged nanofiltration membrane was fabricated from polyvinyl chloride- graft -poly( N,N -dimethylaminoethyl methacrylate) by heating and crosslinking treatment. We characterized the surface chemical compositions, membranes structures, surface hydrophilicity and surface charges of the prepared membrane. The estimated membrane pore diameter is 1.98 nm and the pore diameters are in the range of 0.5–2.0 nm. The membrane exhibits excellent water permeability (9.3 L m −2 h −1 bar −1 ) and salt rejection (93.1% with MgCl 2 solution). Both the heating treatment and crosslinking reaction can diminish the pore size of the precursor membrane. The membrane hydrophilicity is improved after quaternization, leading to higher water permeability compared with the membrane treated by heating only. Moreover, surface quaternization and crosslinking offer the membrane excellent pressure resistance and long-term stability. The prepared nanofiltration membrane has great promise in many applications including water softening and multivalent ion removal.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 44
·e54616
·
IF 3
Zeya Li,Xiuli Wang,Qinglei Zhang,Mingyu Zhai,Shuqin Yang,Xida Li,Sirui Yang,Xin Wu,Laizhou Song
The nanofiltration (NF) membrane technology has attracted considerable attention for the rejection removal of various salts. However, the practical application of this membrane separation process has been severely retarded due to the ineffective rejection of monovalent ions (such as nitrate and chloride), undesirable filtration flux, and insufficient disposal of the concentrated solution. In this work, three polyethersulfone-type NF membranes were fabricated and their morphologies, functional groups, chemical components, wettabilities, chargeabilities, and rejection molecular weights were characterized. Among them, the membrane of NF_M3 bearing sulfonic acid group ( SO 3 H) shows the desirable rejection efficiency of nitrate (90.32%), acceptable solution filtration flux (10.15 L m −2 h −1 at 0.6 MPa), and the decent pure water permeation flux (50.8 L m −2 h −1 at 0.6 MPa). The introduction of SO 3 H can significantly enhance the performances of NF_M3 membrane in hydrophilicity, chargeability, anti-fouling, and the oxidation resistance. Promisingly, the concentrated nitrate was ingeniously recycled for the electrochemical intercalation of flake graphite to prepare expandable graphite, and the obtained expanded graphite has an acceptable expanded volume (243 mL g −1 via the microwave expansion process), thereby achieving the resource utilization of NF concentrated solution.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 9
·49940
·
IF 2.52
Cheng-Ye Zhu,Xi Zhang,Zhi-Kang Xu
It is still a task to synthesize polyamide-based membranes with selective layers down to 10–20 nm for high performance desalination. Herein, cellulose nanocrystals (CNC) were used as one-dimensional (1D) nanorods and graphene oxides (GO) as two-dimensional (2D) nanosheets, respectively, to construct nanocomposite interlayers for synthesizing polyamide layers thinner than 15 nm. The 2D nanosheets are homogeneously mixed with the 1D nanorods and effectively reduce the surface roughness of the nanocomposite interlayers with decreasing the mass ratio of CNC/GO. Polyamide layers with a thickness of 10–15 nm have been synthesized at an ultralow monomer concentration of 0.025 wt% on these CNC/GO nanocomposite interlayers. The polyamide-based membranes exhibit extremely high water permeation (45.9 L/m 2 ·h·bar) without losing their salt rejection ability. The nanofiltration performances of these polyamide-based membranes are higher than most of the reported nanofiltration membranes in recent years.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）