SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Chen Liu,Mengjiao Yan,Kangying Guo,Yue Gao,Fang Liu,Baoyu Gao
Membrane fouling is a serious problem that limits the widespread application of membrane technology. Herein, we propose an effective modification method by in-situ modifying polyethersulfone (PES) ultrafiltration membrane with tannic acid (TA) and Fe 3+ chelates to improve its pollution resistance. The TA-Fe 3+ complexes could deposit on the PES membrane surface and form a hydration layer by Van Der Waals force, hydrogen bonding force, and hydrophobic association. The modified membrane (PES\TA\Fe 3+ ) had enhanced fouling resistance and membrane flux due to its dual advantages of abundant OH groups and favorable spatial structure. After modification, the roughness of membrane surface increased from 219 nm to 257 nm, and its water contact angle decreased from 58.9° to 26.5°, endowing the PES\TA\Fe 3+ membrane with a strong resistance to oil droplets through electrostatic repulsion, steric hindrance effect, and hydrogen bonding force. Polyaluminum chloride-polydimethyldiallylammonium chloride (PAC-PDMDAAC) could alleviate 85 % membrane fouling resistance. PAC-PDMDAAC mainly mitigated irreversible membrane fouling by removing oil droplets and forming large and loose flocs. While the use of PES\TA\Fe 3+ membrane mainly reduced the adsorption resistance and the resistance of membrane itself. The anti-fouling performance of PES\TA\Fe 3+ membrane changed with pH owing to the changes in the properties of TA-Fe 3+ complexes. The hydrophilic layer would be decomposed under alkaline conditions due to the deprotonation of TA and excessive hydrolysis of Fe 3+ . This study provides an efficient anti-fouling strategy and reveals the modification and anti-fouling mechanisms of the hydrophilic membrane, providing theoretical guidance for the further development of membrane technology.
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
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Jiahui Zhao,Dahai Zeng,Qiwei Wang,Zhidan Lin,Florian Vogel,Wei Li,Peng Zhang
Ultrafiltration technology, separating water from impurities by the core membrane, is an effective strategy for treating wastewater to meet the ever-growing requirement of clean and drinking water . However, the similar nature of hydrophobic organic pollutants and the membrane surface leads to severe adsorption and aggregation, resulting unavoidable membrane degradation of penetration and rejection. The present study presents a novel block amphiphilic polymer, polyethersulfone-g-carboxymethyl chitosan@MWCNT (PES-g-CMC@MWCNT), which is synthesized by grafting hydrophobic polyethersulfone to hydrophilic carboxymethyl chitosan in order to suspend CMC in organic solution. A mixture of hydrophilic carboxymethyl chitosan and hydrophobic polymers (polyethersulfone), in which hydrophilic segments are bonded to hydrophobic segments, could provide hydrophilic groups, as well as gather and remain stable on membrane surfaces by their hydrophobic interaction for improved compatibility and durability. The resultant ultrafiltration membranes exhibit high water flux (198.10 L m −2 ·h −1 ), suitable hydrophilicity (64.77°), enhanced antifouling property (82.96%), while still maintains excellent rejection of bovine serum albumin (91.75%). There has also been an improvement in membrane cross-sectional morphology, resulting in more regular pores size (47.64 nm) and higher porosity (84.60%). These results indicate that amphiphilic polymer may be able to significantly promote antifouling and permeability of ultrafiltration membranes.
研究领域:
环境科学
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材料科学
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水处理技术
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Yanli Zhang,Lei Gao,Jinpeng Sun,Xu Li,Qingping Xin,Xiaoli Ding,Ningning Gao,Yuzhong Zhang
Membrane humidification remains a key concern for proton exchange membrane fuel cell (PEMFC), yet sulfonated polymer membranes like SPEEK, which suffer from excessive swelling and mechanical degradation under high-humidity operation. In this study, a multiscale porous PES/SPSf hybrid humidified membrane with rigid PES backbone and -SO 3 H functionality is fabricated via phase inversion. The porous substructure promotes capillary condensation, while the hydrophilic structure domains enhance water adsorption and diffusion. Compared to pure M0 membrane, the M30-6 membrane achieves a water vapor permeability of 2917 GPU and a water vapor/N 2 selectivity of 1307, representing 59% and 686% enhancements, respectively. The synergistic effect between hydrophilic -SO 3 H group and the multiscale porosity structure demonstrates the potential of these membrane designs to strengthen the PEMFCs' humidification.
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2024
·
IF 5.9
Yi Guo,Jinchao Chen,Chunmei Gao,Shifeng Ji,Yunqing Xing,Wenjing Tan
In this paper, ZIF-L was blended with citric acid (CA) and polyethersulfone (PES) to prepare a casting solution. A novel negatively charged ultrafiltration (UF) membrane (ZIF-L/CA/PES) was obtained using the reverse thermally induced phase separation (RTIPS) method. The hydrophilic carboxyl groups present in CA not only imparted high hydrophilicity and negative charge to the membrane surface, enhancing the membrane’s selectivity and contamination resistance, but also created an acidic environment to attack the Zn atoms in ZIF-L by the ionized H + from CA, resulting in the generation of micro-defective pores and an improvement in permeability. Additionally, the results showed that membranes generated through the RTIPS process exhibit uniform porous surfaces and spongy cross-sections, enhancing membrane performance. The optimized membranes demonstrated the capability to achieve a pure water flux of up to 2267 L/m 2 h with 93.1 % humic acid (HA) retention, and a remarkable membrane flux recovery rate of 75.8 %, suggesting the crucial roles played by CA and ZIF-L in the separation process. In conclusion, hydrophilic anti-fouling UF membranes with a high negative charge and excellent permeation selectivity were fabricated by establishing micro-defective channels through the incorporation of carboxylic acid and ZIF-L, combined with the RTIPS process.
研究领域:
材料科学
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环境工程
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膜技术
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2022
·Vol. 46
·期 14
·19357-19367
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IF 4.672
Jiuqing Liu,Feifei Song,Junying He,Zikun Hong,Qihou Li,Ya Chen,Lishun Bai,Fanli Zeng,Chen Cheng,Zehao Chen
Summary Owing to its unparalleled theoretical energy density, the Li-O 2 batteries are thought to be one of the most promising energy storage systems, but its application is seriously hindered by its potential safety risks arising from the passivation and corrosion of lithium anode. To address these issues, it is an efficient way to develop functionalized separator that could prevent the migration of anions and macromolecules from cathode toward anode. Herein, a novel Nafion-functionalized polyethersulfone (PES)-based ion-permselective separator was prepared by using non-solvent induced phase separation (NIPS) method. The Nafion ensures a better physical strength of the composite separator, and further characterizations show that the obtained composite separator owns good ionic conductivity (0.52 mS cm −1 ), high lithium ion migration number (0.80), and better cyclic stability (120 cycles, 1000 mAh g −1 ). Consequently, the composite separator serves as an excellent candidate to solve the “shuttle effect” of redox mediators (RMs), the assembled Li-O 2 battery with composite separator adding LiI as RMs presents lower charge overpotential and longer cycle stability (170 cycles, 1000 mAh g −1 ).
研究领域:
材料科学
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电化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Zezhen Zhang,Shuman Feng,Mengqing Ren,Haolan Xiao,Shanjun Gao,Lili Wu
Precisely controlling pore structure and surface chemistry in ionic polymer membranes during nonsolvent induced phase separation (NIPS) remains challenging. Here, SPES/PES blend membranes were fabricated by systematically varying salt type and concentration in the coagulation bath, showing that cation-anion valence matching, besides salt concentration, also regulates membrane structure during NIPS. Experimental results showed that, relative to pure water, salt-containing baths slowed phase separation and yielded denser membranes, with a stronger effect at higher salt concentrations. Valence-matched salts produced smaller surface pores than valence-mismatched salts (Na 2 SO 4 and MgCl 2 , 22.79 and 19.62 nm, respectively), whether compared at equal concentration (0.1 M: NaCl 16.74 nm, MgSO 4 13.73 nm) or equal ionic strength ( I = 0.3: NaCl 11.26 nm, MgSO 4 15.14 nm). This trend may be related to stronger SPES chain aggregation in valence-matched salt solutions. Salt baths suppressed SPES loss into the coagulation bath, thereby enriching surface sulfonate groups and improving hydrophilicity. The membrane prepared in 0.1 M MgSO 4 exhibited excellent separation performance (>99% BSA, 96% Lyz, and 97% MB rejection) and enhanced mechanical strength (5.97 MPa). This pore-forming-agent-free strategy provides a simple route to high-performance functionalized membranes.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Jiahao Liu,Liguo Shen,Hongjun Lin,Zhengyi Huang,Huachang Hong,Cheng Chen
Metal-organic frameworks (MOFs) have been considered as promising nanofillers to fabricate mixed matrix membranes for water treatment. However, manipulating distribution of MOFs nanoparticles in the membrane matrix remains a great challenge. In this study, UiO-66 was firstly coated by magnetic Ni via an in-situ reduction reaction, and then incorporated into polyethersulfone (PES) membrane matrix to prepare PES-Ni@UiO-66 membrane. The magnetic Ni allowed to manipulate the distribution of magnetic Ni@UiO-66 in the phase-inversion process by an external magnetic field. The hydrophilic Ni@UiO-66 can be pulled onto membrane surface by the magnetic force, endowing the prepared membrane with rather higher hydrophilicity. The prepared membrane exhibited superior water permeability with a pure water flux of 611.5 ± 19.8 L·m −2 ·h −1 and improved antifouling performance. Moreover, benifiting from photocatalytic activity of the exposed Ni@UiO-66 on membrane surface, the obtained PES-Ni@UiO-66 membrane demonstrated excellent photocatalytic self-cleaning ability with a flux recovery rate (FRR) higher than 95% under UV irradiation. Analyzing by extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory indicated that the improved antifouling performance could be attributed to less attractive or even repulsive interaction between the prepared membrane and pollutants. This work provided valuable guidance for structural regulation and development of high-performance MOFs-based membranes 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
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2022
·
IF 10.753
Kaizhen Wang,Shuhao Wang,Kaifeng Gu,Wentao Yan,Yong Zhou,Congjie Gao
Polyamic acid (PAA) is a flexible polymer and has abundant valuable hydrophilic groups. Herein, we developed an ultra-low pressure ultrafiltration (UF) membrane by integrating PAA into the polyethersulfone (PES) matrix via the “in-situ polycondensation” method. PAA was well compatible with PES and distributed uniformly in the membrane. The introduction of PAA improved membrane hydrophilicity. Meanwhile, the membrane pore structures were also refined. The membrane exhibited an excellent permeability under ultra-low pressure due to its improvement of hydrophilicity and pore structures. Under 0.3 bar, compare with the water flux of PES membrane, PES/PAA membrane improved nearly 2 times (571.05 L/(m 2 ·h)), with a high BSA rejection (≥90%). Even under a lower pressure, 0.1 bar, >300 L/(m 2 ·h) still can be achieved. Interestingly, the membrane we developed could maintain a high performance after drying, and then is very suitable for dry preservation. PES/PAA membrane showed a high oil removal (≥92%) and could remove oil from water effectively. Besides, the membrane exhibited excellent anti-oil-fouling properties. The flux recovery rate of PES/PAA (70.0%) far exceeds that of PES (37.9%) after three filtration and cleaning cycles. The membrane we developed is very valuable in oily wastewater 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
PubMed
高影响因子
Polymer Chemistry
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2014
·Vol. 5
·期 11
·3563-3575
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IF 5.368
Hongju Zhou,Chong Cheng,Hui Qin,Lang Ma,Chao He,Shengqiang Nie,Xiang Zhang,Qiang Fu,Changsheng Zhao
Research on the interface self-assembly of functional layers is fuelled by diverse biomedical needs, like drug encapsulation and release, stem cell proliferation and differentiation, cell and tissue cultures, as well as artificial organs. In this study, a novel and biocompatible 3D composite layer is fabricated on a membrane substrate by the layer-by-layer (LBL) self-assembly of graphene-based 2D supermolecules. The graphene-based 2D supermolecules are prepared by grafting poly(styrenesulfonate) (PSS, polyanion) and poly(acrylamide) (PAM, polycation) onto graphene oxide (GO) through free radical polymerization. Then, the prepared graphene-based supermolecules are taken to construct a 3D porous thin film layer through a LBL process. Polyethersulfone (PES) membrane is chosen as the model substrate. The chemical composition, surface morphology, water contact angle, surface zeta-potential, blood compatibility and the cell compatibility are systematically investigated. The results indicate that the 2D graphene-based supermolecules are successfully assembled into a 3D porous thin film layer structure on the membrane surface. The assembled layer shows increased hydrophilicity, suppressed platelet adhesion, and a limited hemolysis ratio and complement activation compared to the pristine substrate. The cell morphology observation and cytotoxicity assays demonstrate that the 3D graphene layer shows superior performance both in endothelial and hepatocyte cells proliferation and morphology differentiation. In addition, the excellent anticoagulant bioactivities indicate that the 2D graphene-based supermolecules have heparin-mimicking biological activity. In general, the protocol of interface thin film layer self-assembly confers the modified substrates with integrated blood compatibility, cell proliferation and biological activity; which may forward the fabrication of multi-functional biomedical devices by using the 2D graphene-based supermolecules.
研究领域:
生物医学工程
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材料科学
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生物材料
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组织工程
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产品关联
DOI
高影响因子
Membranes
·
2021
·Vol. 11
·期 9
·699
·
IF 4.106
Shuai Liu,Xiaofeng Fang,Mengmeng Lou,Yihan Qi,Ruo Li,Gang Chen,Yonglian Li,Yanbiao Liu,Fang Li
The effective separation of dyes and inorganic salts is highly desirable for recycling inorganic salts and water resource in printing and dyeing wastewater treatment. In this work, tannic acid (TA) and polyethyleneimine (PEI) were grafted on the PES/Fe ultrafiltration membrane via the coordination assembly and Michael addition strategy to fabricated a loose nanofiltration membrane (LNM). The effect of PEI concentration on membrane morphologies and properties was systematically investigated. The membrane surface becomes more hydrophilic and transforms into positive charge after the PEI grafting. The optimized PES/Fe-TA-PEI membrane possesses high pure water flux (124.6 L·m−2·h−1) and excellent dye rejections (98.5%, 99.8%, 98.4%, and 86.4% for Congo red, Eriochrome black T, Alcian blue 8GX, and Bromophenol blue, respectively) under 2 bar operation pressure. Meanwhile, the LNM showed a high Alcian blue 8GX rejection (>98.4%) and low NaCl rejection (<5.3%) for the dye/salt mixed solutions separation. Moreover, the PES/Fe-TA-PEI LNM exhibited good antifouling performance and long-term performance stability. These results reveal that such LNM shows great potential for effective fractionation of dyes and salts and recycling of textile wastewater.Keywords:loose nanofiltration;dye desalination;polyphenol;polyethyleneimine;grafting
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2024
·
IF 2.8
Wei Wang,Peipei Li,Jiaqi Wang,Baiyu Xu
BACKGROUND An antifouling and acid/alkali-resistant sulfonated polyethersulfone (S-PES)/polysulfate (PSE) composite ultrafiltration (UF) membrane prepared via a nonsolvent-induced phase separation (NIPS) method was used for the purification of ulinastatin (UTI) as an examplar protein-based drug. RESULT The effect of the content of S-PES on the structure and UF performance of the S-PES/PSE composite UF membrane was investigated. The acid/alkaline resistance of the S-PES/PSE membranes was evaluated in the pH range 5–10 suitable for a UTI solution. UF desalination experiments were carried out on UTI elution collection solution, and the antifouling performance and long-term stability of S-PES/PSE composite UF membrane were evaluated. The results indicate that, for the optimal content of 4% S-PES, pure water flux increased from 120 to 726 L m −2 h −1 , WCA decreased from 79.3° to 51.0°, and the rejection of UTI was 95.90% ± 1.1% compared to PSE. Compared with PES and PSF membranes, the flux recovery rate of the S-PES/PSE composite UF membrane was 80.63% (an increase of 32.48%), and the UTI adsorption was only 75.00 μg cm −2 (a decrease of 88.00%) after simulated antifouling experiments. CONCLUSION The S-PES/PSE composite UF membrane has excellent long-term stability, suggesting significant potential for application in the purification of protein-based drugs and in large-scale UTI purification. © 2024 Society of Chemical Industry (SCI).
研究领域:
材料科学
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生物医学工程
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制药工程
✓ 已验证
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
Xiaojie Cheng,Jiahui Liao,Yue Xue,Qingquan Lin,Zhaomei Yang,Guilong Yan,Guangyong Zeng,Arijit Sengupta
Membrane separation technology is considered as one of the most promising wastewater treatment technologies. However, difficulties in thorough water purification and poor fouling resistance in practical applications are some of the major concerns associated to membrane-based water purification. In the present investigation, a combination of efficient and environmentally friendly photocatalysis technology has been adopted for the fabrication of a series of [email protected] multifunctional photocatalytic composite membranes by stacking MXene nanosheets and BiOCl-PPy photocatalytic nanoparticles on polyethersulfone (PES) substrates. The composite membranes with BiOCl-PPy nanoparticles exhibited excellent permeation performance with pure water (flux of 3680.2 L m −2 h −1 ). Moreover, the composite membranes achieved 99.9% of combined removal rate for three different dyes and 96% for antibiotic (Tetracycline Hydrochloride) by physical sieving and photocatalytic degradation. The self-cleaning mechanism of composite membranes maintained good long-term permeability and selectivity during the cyclic tests. Hence, the service life of the membrane under visible light irradiation has been significantly improved without any compromise on the membrane performance. The density functional theory (DFT) calculation has been utilized to understand the mechanism in enhancing the photocatalytic activity of the composite membrane.
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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水处理
✓ 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）