Membranes
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2021
·Vol. 11
·期 9
·705
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IF 4.106
Kaifeng Gu,Sichen Pang,Yong Zhou,Congjie Gao
Nanofiltration (NF) is a separation technology with broad application prospects. Membrane fouling is an important bottleneck-restricting technology development. In the past, we prepared a positively charged polyethyleneimine/trimesic acid (PEI/TMA) NF membrane with excellent performance. Inevitably, it also faces poor resistance to protein contamination. Improving the antifouling ability of the PEI/TMA membrane can be achieved by considering the hydrophilicity and chargeability of the membrane surface. In this work, sodium chloroacetate (ClCH2COONa) is used as a modifier and is grafted onto the membrane surface. Additionally, 0.5% ClCH2COONa and 10 h modification time are the best conditions. Compared with the original membrane (M0, 17.2 L m−2h−1), the initial flux of the modified membrane (M0-e, 30 L m−2h−1) was effectively increased. After filtering the bovine albumin (BSA) solution, the original membrane flux dropped by 47% and the modified membrane dropped by 6.2%. The modification greatly improved the antipollution performance of the PEI/TMA membrane.Keywords:nanofiltration;sodium chloroacetate;modification;antipollution performance
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Gongduan Fan,Chongguo Chen,Xiaolei Chen,Zhongsheng Li,Shulei Bao,Jing Luo,Dingsheng Tang,Zhongsen Yan
Ultrafiltration is an environmentally friendly water treatment technology, but membrane fouling significantly impacts membrane performance and service life. Photocatalytic modification of membrane is regarded as an effective way for membrane fouling control. In this study, graphite oxide (GO), Ag 3 PO 4 and Ag 3 PO 4 -GO nanomaterials were applied in polyvinylidene fluoride (PVDF) ultrafiltration membranes modification, and the membranes was denoted as P-GO, P-AgP and P-AgP@GO, respectively. Filtration of humic acid (HA) at different operating conditions was adopted in evaluation of membrane performance. Among them, P-AgP@GO had the best permeation, rejection and antifouling performances, and could maintain excellent properties when operation conditions (HA concentration, operation pressure, pH and ionic strength) were changed. Furthermore, the effect of photocatalysis on the self-cleaning performance and its mechanism were revealed. The overall performance of P-AgP@GO could be enhanced by visible light irradiation, and extending the visible illumination time during the filtration was conducive to the reusability.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2011
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IF 1.795
Jing Yuan,Jian-qiang Meng,Yin-lin Kang,Qi-yun Du,Yu-feng Zhang
This paper describes a facile and novel approach for the surface glycosylation of poly(vinylidene difluoride) (PVDF) microporous membrane. A glycopolymer poly( d -gluconamidoethyl methacrylate) (PGAMA) was tethered onto the membrane surface via activators generated by electron transfer atom transfer radical polymerization (AGET ATRP) directly initiated from the PVDF surface. Chemical changes of membrane surface were characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). It was revealed that PGAMA was successfully grafted onto the membrane surface and its grafting density can be modulated in a wide range up to 2.4 μmol/cm 2 . The effects of glycosylation on membrane morphology, flux and surface hydrophilicity were investigated. Field emission scanning electron microscopy (FESEM) results indicated shrinkage of the surface pore diameters and the growth of the glycopolymer layer on the membrane surface. The static water contact angle (WCA) of the membrane surface decreased from 110° to 30.4° with the increase of grafting density, indicating that the PGAMA grafts dramatically improved the surface hydrophilicity. The protein adsorption and platelets adhesion experiments indicated that the grafted PGAMA could effectively improve the membrane antifouling property and biocompatibility.
研究领域:
材料科学
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生物医学工程
✓ 已验证
DOI
高影响因子
DESALINATION
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2025
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IF 9.8
Weiwei Huang,Xiaozhen Lu,Wenzong Zhou,Weiwei Lv,Quan Yuan,Hang Yang,Xinwei Kang,Daoji Wu,Lin Wang,Xuewu Zhu
Polyamide (PA) nanofiltration (NF) membranes are promising for diverse water treatment applications, particularly due to their high permeability, selectivity, and inherent antifouling properties. These NF membranes are highly sought after delivering high-quality drinking water. The development of high-performance NF membranes through interfacial polymerization (IP) requires careful optimization of heat treatment and post-treatment processes. In this study, we integrated these steps to establish an optimized heat treatment strategy utilizing post-treatment solutions. Systematic investigations revealed that the use of NaOH as a heating reagent etched the PA layer while promoting the hydrolysis of chloride groups, resulting in NF membranes with enhanced negative charge, improved hydrophilicity, and increased pore size. The optimized Post-3 demonstrated exceptional performance, with a permeability of 29.3 LMH/bar while achieving a remarkable 97.3 % removal efficiency for Na 2 SO 4 . The Post-3 exhibited excellent selectivity for both monovalent and multivalent ions, making it ideal for advanced water treatment applications. Furthermore, during natural surface water purification, the Post-3 effectively removed organic compounds while retaining moderate mineral content, ensuring the provision of safe drinking water with optimal mineral composition. The study also highlighted the outstanding fouling resistance and long-term stability of the Post-3, offering valuable insights into the customization of NF membranes for advanced drinking water treatment systems.
研究领域:
材料科学
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水处理工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2013
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IF 4.093
Guoliang Zhang,Shufei Lu,Liang Zhang,Qin Meng,Chong Shen,Jiwei Zhang
Hybrid membranes formed by blending TiO 2 nanoparticles and organic materials are attractive for creating new materials with enhanced properties such as high permselectivity, good hydrophilicity and excellent fouling resistance in a wide range of applications. In order to overcome the agglomeration of nanoparticles in membranes and leakage of nanoparticles from nanocomposite membranes in the water treatment process and enhance the hydrophilicity of membranes, polymer chains of HEMA (2-hydroxyethyl methacrylate) were grown from TiO 2 by the atom transfer radical polymerization (ATRP) process in methanol. The hybrid polysulfone (PSF) membranes were then prepared by adding different ratios of TiO 2 (T membranes) and TiO 2 -g-HEMA (HT membranes) particles via phase inversion induced by the immersion precipitation technique. The modification nanoparticles were found to provide obvious improvements in reducing the particles agglomeration and fouling in sheet membranes. Different techniques such as SEM, TEM , FTIR, EDS, contact angle goniometry and filtration experiments of water, BSA and EPS were applied to characterize and explore the performance of particles and membranes. Compared with unmodified TiO 2 particles, modified TiO 2 particles held enhanced hydrophilicity, better compatibility and dispersibility in organic solvent and matrix polymer . Similarly, the HT membranes exhibited superior water flux and anti-pollution performance in separation than the pure PSF membrane and T membranes.
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
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2023
·
IF 9.5
Haiyu Luo,Nan Xu,Yanan Li,Junzhi Li,Wenlan Ji,Pei Nian,Zheng Wang,Yibin Wei
MXene nanosheets have been identified as promising building blocks for high-performance nanofiltration (NF) membranes in water purification . Herein, we report a series of amino acid-bonded Ti 3 C 2 T x MXene membranes with enhanced NF performance and antifouling properties via glycine (Gly), l -glutamic acid (L-Glu), l -lysine (L-Lys) or l -cysteine (L-Cys) modification. The physicochemical properties, separation performances and anti-fouling behaviors of the pure Ti 3 C 2 T x MXene membrane, Gly-, L-Glu-, L-Lys- and L-Cys-bonded Ti 3 C 2 T x MXene membranes were comparatively investigated. The stable Ti–N bonds were found between the amino acids and the MXene nanosheets and different amino acids lead to different properties of the corresponding membranes. While maintaining ultra-high rejections to various organic dyes, all the amino acid functionalized membranes exhibited enhanced water permeability (7.17–13.11 L·m −2 ·h −1 ·bar −1 ) compared with that of the pure MXene membrane. Importantly, the Gly-bonded membrane showed the optimal separation performance with high salt rejections of 86.28%, 81.36%, 72.88% and 66.82% to MgSO 4 , MgCl 2 , Na 2 SO 4 and NaCl, respectively, and the membrane also exhibited superior anti-fouling property with a flux recovery rate of 80.59% to bovine serum albumin (BSA). The separation mechanism was further revealed which may offer a simple yet efficient way for enhancing 2D MXene-based NF membranes.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Arabian Journal of Chemistry
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2023
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IF 6
Yingjian Zhai,Jing Yang
There is an urgent need for an antifouling membrane to treat the large volume of dye-containing wastewater generated annually by the dyeing and printing industry. PDA@ZnO/PVDF membranes were synthesized by doping polydopamine (PDA) and zinc oxide (ZnO) nanoparticles into the polyvinylidene fluoride (PVDF) membranes via non-solvent induced phase separation (NIPS) method in which polyvinylpyrrolidone (PVP) and lithium chloride (LiCl) were chosen as the porogens respectively. Their microstructures were characterized, and the membranes were examined for antifouling properties and membrane separation performance. The presence of PDA@ZnO nanoparticles on the PVDF membrane was evidenced by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) measurements. The addition of PDA@ZnO enhanced the mechanical strength and hydrophilicity of the nanocomposite membranes. The PVDF membranes' water permeability and antifouling properties improved following mixing modification, according to the dye filtration test. The pure water flux of PDA@ZnO/PVDF hybrid membranes changed from 260.0 L·m −2 ·h −1 ·bar −1 to 1339.2 L·m −2 ·h −1 ·bar −1 by varying the concentration of PDA@ZnO nanoparticles from 0 wt% to 1.6 wt%. The retention performance of the modified membranes was shown to be significantly superior to the pure PVDF membrane. The modified membranes with the addition of 2.0 wt% PVP and 1.6 wt% PDA@ZnO nanoparticles had highly disperse blue 79 (DB 79) retentions (88.5%), indicating that the modified membrane possessed the characteristics of a promising membrane for the purification of dye. Tests found that PDA@ZnO significantly improved the membrane's antifouling performance.
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
Membranes
·
2021
·Vol. 11
·期 5
·342
·
IF 4.106
Lixin Xie,Yan Liu,Wen Zhang,Shichang Xu
Reverse osmosis (RO) membranes are widely used in the field of water treatment. However, there are inevitably various fouling problems during long-term use. Surface engineering of RO membranes, such as hydrophilic modification, has attracted broad attention for improving the anti-fouling performance. In this work, we constructed a green biomimetic composite modification layer on the surface of polyamide membranes using a dopamine (DA)/tannic acid (TA) co-deposited layer to bridge the polyamide surface and hydrophilic phytic acids (PhA). The DA/TA interlayer could firmly adhere to the RO membranes, reducing the aggregation of DA and providing abundant phenolic hydroxyl sites to graft PhA. Meanwhile, the anchored PhA molecule bearing six phosphate groups could effectively improve the superficial hydrophilicity. The membranes were characterized by the SEM, AFM, XPS, water contact angle test, and zeta potential test. After surface modification, the hydrophilicity, smoothness, and surface electronegativity were enhanced obviously. The flux and rejection of the virgin membrane were 76.05 L·m−2·h−1and 97.32%, respectively. While the modified D2/T4-PhA membrane showed decent permeability with a water flux of 57.37 L·m−2·h−1and a salt rejection of 98.29%. In the dynamic fouling test, the modified RO membranes demonstrated enhanced anti-fouling performance toward serum albumins (BSA), sodium alginates (SA), and dodecyl trimethyl ammonium bromides (DTAB). In addition, the modified membrane showed excellent stability in the 40 h long-term test.
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 HAZARDOUS MATERIALS
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2025
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IF 11.3
Xianyu Kang,Xiangfang Liu,Qingchun Ge
Conventional polyamide nanofiltration (NF) membranes (PA-M 0 ) exhibit poor As(III) removal efficiency primarily due to the neutral molecular form (H 3 AsO 3 ) of As(III) under typical conditions. Although alkaline environments can convert As(III) into an anionic species to enhance separation, most NF membranes lack chemical stability at high pH. Herein, we develop a series of alkali-resistant NF membranes (PA-M T , T = 1–24 h, representing the reaction time) through H₂SO₄/EtOH-induced physical swelling and chemical reconstruction of PA-M 0 , enabling efficient As(III) removal in alkaline media. The optimized membrane, PA-M 6 h , improves As(III) rejection substantially from 19.9 % to 90.2 % as feed pH increases from 7 to 10, while maintaining a high water flux of 17.7 LMH/bar, This performance considerably surpasses that of PA-M 0 and previously reported NF systems (typically 10 – 60 % rejection). Furthermore, PA-M 6 h exhibits exceptional antifouling properties, sustaining 91.5 % As(III) rejection and a stable flux of 13.7 LMH/bar over extended cycles in the presence of humic acid foulants — more than doubling the removal efficiency of PA-M 0 (5.9 LMH/bar). This study advances molecular-scale interfacial engineering in membrane design, promoting the development of environmentally sustainable separation technologies and providing a scalable solution for arsenic-safe water purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Chen-Zheng Yan,Zhi-Yang Zhang,Chun-Yan Li,Song-Hai Wu,Yong Liu,Xu Han
Although the slippery liquid-infused porous surfaces (SLIPSs) exhibit highly antifouling performance against various working liquids, the loss of lubricant always deteriorates their long-term durability. Herein, a spongy composite of polyvinylidene difluoride (PVDF) and hydrangea-type perfluorooctyltrimethoxysilane (POTS)-modified mesoporous silica nanoparticles (MSNs) has been successfully prepared via the spraying method and used as the substrate for SLIPSs, which exhibits satisfactory storage and lock capacities for lubricant to enhance its durable antifouling performances. After infusing perfluoropolyether (PFPE) into the spongy substrate, a stable POTS-MSNs@PVDF@PFPE is prepared, which exhibits high amphiphobic performances (WSA of 1.68 ± 1.13° and OSA of 5.99 ± 1.34°) and high repellence to various working liquids, indicating its high antifouling performance. The long freezing time of 121.50 s and the low ice-adhesion strength of 25.67 kPa also indicate its high anti-icing performances. Furthermore, the high stability of POTS-MSNs@PVDF@PFPE after various thermal, chemical, and mechanical testing indicates its satisfactory durability. Actually, the abundant micropores of POTS-MSNs@PVDF provide adequate space for locking PFPE, thus prolonging its antifouling performances. This study provides an insight into the development of SLIPSs capable of maintaining long-term antifouling performance in harsh environments.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Weijia Gong,Langming Bai,Heng Liang
Electrification can enhance the antifouling performance of ultrafiltration membranes and improve the sustainability of membrane technologies. The design of high-performance conductive membrane materials remains one of the core technologies in electro-assisted ultrafiltration. Here, conductive PVDF/PEDOT:PSS composite membranes were prepared via in situ chemical oxidation polymerization on a PVDF surface. The PVDF/PEDOT:PSS membranes were subsequently used for electro-filtration to study the effect of the applied potential on humic acid fouling. When a voltage of 3 V was applied, the PVDF/PEDOT:PSS 20 membrane was continuously polluted for 5 cycles. The results showed that after simple hydraulic cleaning, the membrane flux recovery rate reached 91 %. Compared with that of the PVDF membrane, the irreversible fouling of the PVDF/PEDOT:PSS 20 membrane decreased by 65 %. The modified Poisson Boltzmann equation indicates that applying cathodic potential on the surface of PEDOT:PSS conductive layer increases the cumulative concentration of counter ions on the membrane surface and the thickness of the charged layer, thereby promoting the migration of peak forces on the membrane surface to the bulk solution, changing the fouling behaviour of HA from cake filtration to standard blocking.
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
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Chengyu Yang,Xiaoju Yan,Cong Ma,Xinping Lin,ChengZhi Yao,XueYan Li
Organic membrane fouling is a major obstacle to the application of membrane distillation in low surface tension wastewater treatment. Membrane modification might be an effective way to mitigate membrane fouling. This study mainly explored the mechanism of enhanced anti-fouling performance of the MXene modified PVDF membrane by applying XDLVO theory combined with surface elemental integration (SEI) method. The rough membrane surfaces were first reconstructed using fractal function. Then, the interaction energy between low surface tension substances and the membranes before and after modification was calculated. The results showed that oil droplets and surfactant fouling were mainly caused by hydrophobic attraction due to Lewis acid-base (AB) interaction energy. By modifying the virgin PVDF membrane with MXene nanoparticles, the polar component of membrane surface tension (γ AB ) increased significantly, so that the interaction energy between all contaminants and membrane surface changed from attraction to repulsion. In addition, roughness weakened the interaction energy between contaminants and membrane surface but significantly lengthened the range of interaction distance, which together determined the ability of the membrane to attract or repel the contaminants. These findings may improve the understanding of the structure-effect relationship between membrane modification and anti-fouling ability, and provide new insights into the membrane modification for MD.
研究领域:
环境科学
·
材料科学
✓ 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）