JOURNAL OF MEMBRANE SCIENCE
·
2022
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IF 10.53
Zitian Liu,Rongrong Qiang,Ligang Lin,Xuesong Deng,Xu Yang,Kongyin Zhao,Jing Yang,Xinyang Li,Wensong Ma,Meina Xu
Selective filtration of dyes and inorganic salts is a challenge for the treatment of textile wastewater containing high salt contents. In this study, selective separation performance of PI/SiO 2 nanofiltration (NF) membrane for dye/inorganic salt mixtures was substantially improved through directional modulation of its thermal treatment parameters after phase inversion. After thermal modification, the pore size, porosity and roughness were reduced, and the mechanical strength was improved. The PI/SiO 2 membrane under optimized thermally-modified conditions (M6, heat treatment conditions: 50 °C for 8 min) possessed high porosity of 79.95%. Besides, the thermally-modified PI/SiO 2 membrane revealed high water permeance of 152.87 L m −2 h −1 ·bar −1 with efficient rejection performance for a variety of typical dyes. In single dye filtration tests, the thermally-modified PI/SiO 2 membrane displayed high rejection (>90%) for Coomassie Brilliant Blue (CBB), Congo Red (CR), Trypan Blue (TB) and Direct Black 38 (DB 38), and exhibited excellent permeance (84.21–133.76 L m −2 h −1 ·bar −1 ). In addition, the thermally-modified PI/SiO 2 membrane could selectively separate dyes and inorganic salts. The membrane exhibited high dye rejection (>90%) and low inorganic salt rejection (<10%) for the filtration tests of CR + NaCl/Na 2 SO 4 and CBB + NaCl/Na 2 SO 4 mixed solutions (2 g L −1 ). In particular, the permeances of the thermally-modified PI/SiO 2 membrane (89.45–130.21 L m −2 h −1 ·bar −1 ) were higher than those of many contemporary NF membranes used for the same type of dye/inorganic salt separation. In conclusion, the present study presents a simple, inexpensive and effective thermal modification means, which shows great promise in the selective filtration of industrial dye wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Siqi Wu,Fei Wang,Shenghua Zhou,Li Long,Zhe Yang,Chuyang Y. Tang
Thin-film composite (TFC) reverse osmosis (RO) membranes fabricated by interfacial polymerization (IP) have been widely applied in seawater desalination. Nevertheless, their separation performance is limited by the permeance-selectivity upper bound. Compared to conventional synthesis/modification techniques, the manipulation of amine monomer distribution for the IP reaction has been far less investigated. In this study, we systematically investigated three classical approaches for m -phenylenediamine (MPD) loading during the IP reaction, i.e., vacuum filtration (TFC-V), roller (TFC-R), and air gun (TFC-A). Our results suggested that the vacuum-assisted approach can greatly enhance the availability of MPD monomers , which could, in turn, result in enhanced “ridge-and-valley” morphology of the polyamide rejection layer as a result of the enhanced nanofoaming effect. Furthermore, the TFC-V membrane demonstrated the highest water permeance of 2.8 ± 0.4 L m -2 h −1 bar −1 compared to TFC-R and TFC-A membranes of 2.1 ± 0.2 L m -2 h −1 bar −1 and 2.1 ± 0.4 L m -2 h −1 bar −1 , respectively. This study provided mechanistic insights to facilitate an improved understanding of membrane synthesis–structure–performance relationships.
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
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 23
·5016-5023
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IF 6.569
Mengqi Bu,Yang Feng,Qingxun Li,Yiran Wang,Shou Feng,Kai Zhang,Yujie Jiang,Lili Fan,Zixi Kang,Daofeng Sun
Metal–organic framework (MOF) membranes with an ultra-small pore size (<4 Å) have shown great prospects in the highly selective separation of small gas molecules such as hydrogen, but their narrow channels may result in a low gas permeance. To improve the gas permeance of ultra-microporous MOF membranes, a stable covalent organic framework (COF) with large and uniform pores is doped to construct a binary COF/MOF all-nanoporous composite (ANC) membrane, equivalent to reducing the effective membrane thickness but avoiding the challenging ultra-thin membrane preparation. The COF synthesized by ball milling is combined with a metal gel to form a precursor membrane, which was then transformed to a COF/MOF ANC membrane by treatment with the MOF ligand vapor. A very small amount of solvent has been applied, offering an environmentally-friendly preparation process. Compared with the pristine MOF membrane, the COF/MOF ANC membranes possess a highly improved gas permeance from 22 GPU to 551 GPU with a slight sacrifice of selectivity; this introduces a new strategy to optimize the separation performance of MOF membranes.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2023
·
IF 9.5
Lulu Wang,Jie Liu,Ruilong Zhang,Junda Wu,Xiaohua Tian,Li Chen,Xiaohui Dai,Yongsheng Yan,Jianming Pan,Jiangdong Dai
It is yet a query that whether chemically heterogeneous superwetting surface is able to enhance the permeability and anti-fouling capability of membrane contemporaneously, heretofore which is lacking and well worth creating. Here, we propose a bio-adhesion coupled with self-assembly strategy, to construct superhydrophilic fluorinated heterogeneous membranes, through in-situ biomimetic adhesion of the hydrophilic polyphenol-silane coating (TAT) on the porous PVDF membrane, as a secondary reaction platform, and subsequently self-assembly of amphoteric fluorocarbon surfactant (FS-50). Unsurprisingly, we find that introducing FS-50 not only significantly strengthens the permeability, but also improves the anti-fouling self-cleaning, thanks to the formation of robust hydration layer and slippery micro-domains with low friction, to realize the dual anti-fouling effects of pollution resistance and release. The champion PVDF/TAT/FS-2.0 % composite membrane exhibits superhydrophilic and underwater superoleophobic (oil contact angle above 162.3°) property with very low oil-adhesion. This composite membrane possesses an ultrahigh water permeance of 29214.6 L m −2 h −1 bar −1 , which is 2.8 times larger than that of pristine PVDF membrane. The PVDF/TAT/FS-2.0 % composite membrane presents the high separation efficiencies (above 99.5 %) for various surfactant-stabilized oil-in-water emulsions and high permeances of 3193.2–4212.3 L m −2 h −1 bar −1 . Especially, the membrane at continuous operation for 1.0 h can reach a high stable permeance of 2505.1 L m −2 h −1 bar −1 . Moreover, this composite membrane shows strong chemical stability and robustness. This research answers the initial question, and provides the insight for further design and production of chemically heterogeneous superwetting membranes with high permeability, selectivity and antifouling ability.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yang Lu,Zhenyi Wang,Wangxi Fang,Yuzhang Zhu,Yatao Zhang,Jian Jin
Porous polymeric support membranes with outstanding organic solvent resistance are highly required for fabricating thin-film composite (TFC) organic solvent nanofiltration (OSN) membranes. In this work, we report the fabrication of a high-permeance TFC-OSN membrane by the use of a polytetrafluoroethylene (PTFE) microfiltration membrane loaded with single-walled carbon nanotubes coated by a polydopamine (PD/SWCNT) network film (named the PD/SWCNT/PTFE composite membrane) as the support. Through interfacial polymerization between m-phenylenediamine and trimesoyl chloride, a polyamide (PA) thin film has successfully grown on the surface of the PD/SWCNT/PTFE composite membrane. The resulting PA TFC-OSN membrane exhibits a high methanol permeance up to 13.2 L m–2 h–1 bar–1 with a rejection rate of 89.6% to 6-hydroxy-2-naphthalenesulfonic acid sodium salt (HNSA, Mw = 246.21). Moreover, the rejection rates of the PA TFC-OSN membrane to various dyes remain unchanged before and after DMF activation, indicating that it possesses an excellent resistance to organic solvents.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
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
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Xiao-Lin Wang,Qian-Hao Chen,Qi-Hui Ye,Hao Ye,Yu-Ting Zhao,Jing Yang,Yucong Yu,Ming-Bang Wu,Juming Yao
Fully aromatic fluorinated polyamide nanofiltration membranes are manifesting the great potential in organic solvent nanofiltration (OSN) especially for their excellent structural stability when exposed to solvents and enhanced nonpolar organic solvent permeance compared with the conventional polyamide membranes. However, the fluorinated amino monomers are difficult to be dissolved in water that impedes the large-scale manufacture of fluorinated polyamide selective layers via the typical interfacial polymerization at the water-alkane interfaces. Herein, we report a straightforward and effective strategy for fabricating aromatic fluorinated polyamide nanofiltration membranes at gas/liquid interfaces while hydrophobic 2,2-bis(4-aminophenyl)hexafluoropropane gases and trimesoyl chloride solutions are selected as the gas and liquid phases, respectively. The obtained membranes show outstanding hydrophobicity with water contact angles of 92°, which is beneficial for the nonpolar organic solvent permeance. The molecular dynamics simulations could also prove that the fluorine-containing groups exhibit much lower absolute interaction energies with the nonpolar solvents compared with those of polar ones. Therefore, our membranes demonstrate an extremely high n-hexane permeance of 21.52 L m −2 h −1 ·bar −1 while maintaining a low MWCO of approximately 452 Da. Moreover, the high fluorine contents endow the membranes with good stability resulting in almost unchanged rejection and permeance during long-term operation.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Shiyi Wang,Hongdan Wu,Tongshu Chai,Zhihui Zhou,Lu Xia,Rongxue Li,Yuqing Sun
γ-Al 2 O 3 ceramic nanofiltration (NF) membranes are promising for water treatment owing to their excellent thermal and chemical durability; however, their widespread application is restricted by low water permeance, severe membrane fouling, and insufficient stability under acidic conditions. Herein, hydrophilic TiO 2 @Al 2 O 3 NF membranes were fabricated via a controlled sol deposition strategy, in which polyvinyl alcohol (PVA) regulated sol penetration into the porous support to construct a defect-free separation layer with reduced transport resistance. Simultaneously, TiO 2 incorporation into the boehmite-derived network induced the formation of Ti–O–Al linkages, leading to enhanced membrane hydrophilicity and structural integrity. As a result, the optimized membrane exhibited a pure water permeance of 23.71 L m −2 h −1 ·bar −1 , corresponding to a 36.13% increase over the pristine Al 2 O 3 membrane, while maintaining high rejections of 91.50% for MgCl 2 and 88.28% for CaCl 2 via the synergistic effects of size sieving and Donnan exclusion. The membrane sustained MgCl 2 rejection above 90% over 48 h of continuous filtration at pH 4, demonstrating enhanced stability under moderately acidic conditions. Significantly improved antifouling performance was achieved, with approximately 1.6-fold higher flux recovery than the pristine membrane after 8 h of tetracycline fouling tests. The enhanced separation performance is attributed to the synergistic effects of reduced transport resistance, Ti–O–Al-mediated structural reinforcement, and the formation of a stable hydration layer that mitigates foulant adhesion. This work presents an effective strategy for engineering ceramic NF membranes with simultaneously enhanced permeance, antifouling capability, and operational stability under moderately acidic conditions, providing new insights into membrane design for water treatment.
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Wenkang Zhang,Qiqi Yang,Qilin Gu,Zheng Liang,Zhijun Xu,Zhaoxiang Zhong,Weihong Xing
Ceramic membranes ultrafiltration (UF) has emerged as a promising alternative to the conventional clarification technology in sugarcane juice clarification industries, given their efficient and eco-friendly separation processes based on the size sieving effect. However, the upscaling application of ceramic UF membranes is still limited by their low permeate flux, high energy consumption and severe membrane fouling. Herein, to utilize the interactions at the interfaces, tubular SiC microfiltration (MF) membranes with special surface wettability were deliberately tailored through a novel penetration pressure counter-balanced crossflow method using 1H, 1H, 2H, 2H-perfluorooctyltrichlorosilane as a hydrophobic agent. The effect of an out-layer pressures (0-4.0 kPa) and flow rate (1.4-2.4 mL·s -1 ) on surface wettability of membranes were studied, and those obtained membranes were applied in sugarcane juice clarification. The wettability, functional groups, binding energy, chemical compositions, and microstructure of modified SiC membranes were analyzed to elucidate their wettability-performance relationships. The performance of modified SiC MF membranes in sugarcane juice clarification were mainly evaluated by the flux decline profiles and permeate solution turbidity. The SiC membrane with hydrophobic inner wall (WCA=142°) and hydrophilic outer surface (WCA=0°) were achieved at out-layer pressure of 2.0 kPa and flow rate of 1.9 mL·s -1 . The results show that the SiC membrane with such asymmetric wettability exhibited ultra-high stable permeate flux (844 L·m -2 ·h -1 ·bar -1 ), satisfactory turbidity reduction rate (95.7%), and relatively low flux decreased rate (64.4%). The improved antifouling performance can be primarily attributed to the hydrophobic inner wall, and negatively charged pore wall. This work primarily demonstrates the application potential of ceramic MF membranes with asymmetric wettability for the effective sugarcane juice clarification.
研究领域:
膜科学
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化学工程
·
食品加工
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材料科学
·
环境技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Fengyi Cao,Rui Ding,Shuyue Wang,Jintao Zhang,Ying Liu,Meng Song
An electrospun membrane with a highly interconnected pore network and low tortuosity is considered as a promising porous support substrate to prepare a nanofiltration (NF) membrane, while it still remains a great challenge to improve the water permeability of the electrospun NF membrane. Therefore, in this study, flower-like dendritic mesoporous silica nanospheres (DMSNs) were embedded into a polyacrylonitrile (PAN) electrospun membrane to regulate the surface structure and interfacial polymerization process, fabricating DMSNs embedded in a PAN electrospun composite NF membrane (PAN–DMSNs–PA). It is found that the embedded DMSNs could reduce the thickness of the polyamide (PA) layer and form a crumpled surface morphology. Moreover, DMSN embedment could lower the negative zeta potential, molecular cutoff, and pore size distribution of the composite NF membrane. The NF performance data show that though PAN–DMSNs–PA composite membranes have similar Evans blue and MgSO4 rejection rates with PAN–PA membrane, they have higher water permeance values. The optimized PAN–DMSNs100–PA membrane has a pure water permeance value of 26.42 L m–2 h–1 bar–1, which is about 1.3 times the pure water permeance value of the PAN–PA membrane, and its rejection order follows the sequence of MgSO4 (96.4%) > Na2SO4 (82.5%) > MgCl (41.0%) > NaCl (32.2%). This study provides an effective way to synthesize high-quality NF 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
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yuan-Hui Yu,Wan-Long Li,Wan-Ting Lin,Ping Fu,Zhi-Kang Xu,Ling-Shu Wan
Nanofiltration (NF) membranes have aroused great attention in recent years. The most commonly used NF membranes are polyamide (PA) thin-film composite (TFC) membranes based on ultrafiltration membranes. Owing to the high porosity and interconnected pores, electrospun nanofibrous membranes are promising substrates for the fabrication of high-flux nanofiltration membranes, i.e., thin-film nanofibrous composite (TFNC) nanofiltration membranes. In this work, poly(l-lactic acid) (PLLA) nanofibrous membranes with adjustable hydrophilicity were successfully fabricated, and then, a PA layer was synthesized on the surface via the interfacial polymerization between piperazine (PIP) and trimesoyl chloride (TMC). The hydrophilicity of PLLA nanofibrous membranes influences the distribution and adsorption weight of PIP, which further affects the formation and morphology of the PA layer. Results indicate that, as the hydrophilicity of PLLA nanofibrous membranes increases, the adsorption amount of PIP increases, the thickness of the PA layer decreases, and the cross-linking degree increases, which ensures both high permeance and high rejection to Na2SO4. The TFNC membranes exhibit a water permeance of 17.0 L·m–2·h–1·bar–1 and a Na2SO4 rejection of 98.0%. This work achieves the control of substrate hydrophilicity by introducing hydrophilic additives and provides new insights for the fabrication of high-performance nanofiltration membranes.
研究领域:
材料科学
·
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）