JOURNAL OF MEMBRANE SCIENCE
·
2015
·
IF 5.056
Xi Quan Cheng,Yuyan Liu,Zhanhu Guo,Lu Shao
Poor fouling and chlorine resistance significantly reduce the service life of traditional aromatic polyamides thin-film-composite (TFC) nanofiltration (NF) membranes, hindering their widespread applications in waste water treatment, pharmaceutical and fine chemicals industries. Herein, novel polyamide (PA) TFC NF membranes synthesized through interfacial polymerization (IP) of amino functional polyethylene glycol (PEG) and trimesoyl chloride (TMC) are designed for achieving dual resistance to fouling and chlorine. The hydrophilic PEG based PA TFC NF membranes show positive charge since the isoelectric points range from pH=8.9 to pH=9.1 and the salts rejection are in the order of R(MgCl 2 )>R(MgSO 4 )>R(NaCl)>R(Na 2 SO 4 ). The high chlorine resistant performance has been proven by maintaining good salt rejections and high water flux of PEG based membranes after treatment by 2000 ppm NaClO for 24 h. Besides, high hydrophilicity (water angle of 15–18.2°) accounts for the excellent fouling resistance of the PEG based membranes with a water flux recovery of 90.2% using BSA as a model molecule. Importantly, the hydrophilic PEG based NF membranes have been exploited to separate several water soluble antibiotics (such as tobramycin, an aminoglycoside antibiotic applied in the treatment of various types of bacterial infections). By optimizing operating conditions, the advanced membranes show highly stable tobramycin solution flux of 37 L m −2 h −1 alongside tobramycin rejections up to 96% with 50 ppm feed concentration under 8.0 bar. When the feed concentration increases up to 800 ppm, our membranes can still exhibit a high rejection over 92%. Therefore, as a promising “green” technique capably declining the solvent emissions and energy-consuming, the designed PEG based NF membranes owning highly efficient antibiotic concentration ability together with dual resistance to fouling and chlorine have great potentials in substituting conventional separation techniques for concentration and purification of active molecules in pharmaceutical and fine chemicals industries.
研究领域:
环境科学
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材料科学
·
制药工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yafei Su,Huawen Peng,Yongjin Hu,Shaoping Li,Jingyi Rao,Qiang Zhao
Conventional polyamide and polyester thin film composite membranes (TFCMs) are susceptible to harsh conditions, because the amide and ester bonds in them will degrade under extreme pH or chlorine oxidants. This work addressed this problem by preparing TFCMs through the Hoffmann alkylation reaction. Two monomers, i.e., 1,4,7,10-Tetraazacyclododecane (TAD) and 1,2,4,5-Tetrakis(bromomethyl)benzene (TBB), were designed and underwent interfacial alkylation on polyacrylonitrile substrate. The TAD-TBB TFCMs feature high positive charge, and show good repulsion (>90%) to divalent cations. Benefiting from the stability of “C-N-C” bonds in TAD-TBB network, both the permeance (13.7 L m −2 h −1 bar −1 ) and cation rejection (90.3%–91.4%) of the TAD-TBB TFCMs are stable after being immersed in 2 M HCl for 21 days. Meanwhile, the TAD-TBB TFCMs maintained good separation performance (permeance: 13.9 L m −2 h −1 bar −1 , MgCl 2 rejection: 90.5%–92.2%) after a total free chlorine exposure of 96000 ppm h (200 ppm for 480 h). This work reported the preparation of cation-selective membranes stable in harsh environments.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shuo-Chun Ke,Xue-Xia Guo,Fangang Meng,Yuanyuan Zhang,Yu-Xi Huang
Conventional polyamide (PA) nanofiltration membranes suffer from poor chemical tolerance, being particularly susceptible to degradation in alkaline and chlorine-containing environments. This inherent nature leads to membrane performance deterioration, severely limiting their practical applications. To overcome these limitations, we developed a surface-enhanced crosslinking strategy involving the sequential grafting of ethylenediamine (EDA) and polyacrylic acid (PAA) onto a piperazine-trimesoyl chloride (PIP-TMC) polyamide layer. The modified IP-EDA/PAA membrane demonstrated altered surface zeta potential, reduced pore size distribution, and a more compact functional layer structure, resulting in both excellent nanofiltration performance and remarkable long-term stability under harsh chlorine and alkaline conditions. The surface-enhanced crosslinking could eliminate the chlorination-active sites through molecular grafting and capping. Besides, the crosslinking also endowed the active layer with improved mechanical stability, enhanced electrostatic repulsion effects, and a sacrificial protection layer. Therefore, the IP-EDA/PAA membrane maintained a rejection rate of ~86.8 % for Na 2 SO 4 following 5-day immersion in a pH 13 NaOH solution and retained ~93.8 % rejection after cumulative chlorine exposure of 80,000 ppm·h (1000 ppm for 80 h). This work successfully demonstrated the design and fabrication of a robust nanofiltration membrane with excellent alkali- and chlorine-resistance.
研究领域:
膜科学
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材料化学
·
化学工程
·
表面改性
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水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Qing Zhang,Zhenping Ma,Xin Jing,Hao-Yang Mi,Yuejun Liu,Songwei Li
The polyamide (PA) reverse osmosis (RO) membranes prepared by interfacial polymerization at a free aqueous–organic interface always suffer from polymerization instability on the free-interface and low chlorine resistance. Focusing on these problems, in this study, a new approach was proposed which introduced an additional buffer layer to assist the free-interfacial polymerization (BLFIP). And due to the adjustment of the mitigation of the organic phase and water phase on the free-interface, defect-free PA membranes with significantly improved surface smoothness were successfully prepared by the proposed BLFIP process and the resultant membranes demonstrated superior desalination performance compared to the PA membranes prepared with the previous technique. With the optimized concentration of 0.3 wt.% trimesoyl chloride (TMC) and 0.6 wt.%, m-xylylenediamine, the prepared BLFIP PA membrane showed salt rejection rate of 92.55%, 92.01%, 83.99% and 95.16%, to Na 2 SO 4 , MgSO 4 , NaCl and methyl orange, respectively at 5 bar, while maintained a water flux of about 2 Lm –2 h –1 bar –1 . More importantly, the BLFIP PA membrane possesses excellent long-term stability, and chlorine resistance comparing with traditional PA membranes based on TMC and m-phenylenediamine, which demonstrated the new method in this study paved a facile way for preparing RO filtration membranes with outstanding performance in seawater desalination.
研究领域:
材料科学
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膜分离技术
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环境工程
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水处理
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高分子化学
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界面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Xianglei Han,Yao Wang,Zhi Wang,Xu Li,Yingying Liu,Chong Wang,Fangzheng Yan,Jixiao Wang
Reverse osmosis membrane with high permselectivity and durability is highly desirable. Due to the self-limiting in interfacial polymerization process, existing strategies for membrane selective layer construction are constrained. Herein, a designable evolutionary strategy named interfacial polymerization plus, which combines interfacial polymerization and UV-induced graft polymerization, is proposed to construct the membrane selective layer. As a result, a sophisticated selective layer with rationally designed bulk and surface is obtained. The selective layer endows membrane with unprecedented improvement in permeability, chlorine-resistant and anti-fouling properties, while maintaining high rejection. Meanwhile, the long-term excellent performance under severe conditions indicates that the developed membrane has great potential in new and expanding applications.
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
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Lei Han,Yining Hou,Ruihang Zhang,Yang Liu,Yan Xiong,Hao-Ran Zuo,Ming Duan
Membranes constructed via C-C bond formation exhibit superior chemical resistance compared to conventional polyamide (PA) membranes of which the performance often deteriorates under extreme pH conditions, making them promising candidates for dye wastewater treatment. In this study, we developed a novel positively charged nanofiltration (NF) membrane, denoted as PCNM, through redox-initiated interfacial free-radical polymerization. Quaternary ammonium groups were introduced to impart a stable positive charge, significantly enhancing dye separation performance. Membrane morphology and surface roughness were characterized using SEM and AFM. The PCNM membrane demonstrated exceptional rejection (>99%) for all tested cationic dyes, including Crystal violet (CV), Brilliant green (BG), Methylene blue (MEB), and Safranine O (SO) with an outstanding separation factor of 736.6 (CV over Na − SO 4 ). Notably, it retained 99% rejection against CV after 48-hour exposure to 2000 ppm NaClO (96,000 ppm·h), highlighting its outstanding chlorine resistance. Furthermore, the membrane exhibited remarkable pH stability, maintaining 99% rejection against CV after 24-hour immersion in 1 mol/L H 2 SO 4 and 1 mol/L NaOH, respectively. Consequently, this work presents a new strategy for fabricating high-performance positively charged NF membranes via interfacial free-radical polymerization, with significant potential for industrial dye wastewater treatment.
研究领域:
材料科学
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环境工程
·
膜分离技术
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高分子化学
·
工业废水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Shaosuo Bing,Jiaqian Wang,Hao Xu,Yanyan Zhao,Yong Zhou,Lin Zhang,Congjie Gao,Li’an Hou
Polyamide (PA) thin-film composite (TFC) reverse osmosis membrane is widely used for desalination , but the selectivity-permeability trade-off and oxidation are two major restrictions on the membrane application. By modifying PA TFC membrane with potassium persulfate (K 2 S 2 O 8 ), we overcame the trade-off relation (the water flux and salt rejection increased by 43.2% and 0.2%, respectively) and improved the chlorine resistance. The modification was demonstrated to be a combination of the interfacial crosslinking between PA layer and polysulfone support with the surficial oxidation of PA layer. The dense crosslinked interface enabled the membrane with higher solute rejection, better chlorine tolerance and long-term stability. Meanwhile, the thinner PA layer contributed to the increase of membrane permeability. Furthermore, the modification method has the application potential in high-performance membrane fabrication in terms of simplicity and high efficiency.
研究领域:
材料科学
·
膜分离技术
·
高分子化学
·
环境工程
·
水处理
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Zhongbao Ma,Chao Wang,Ran Li,Yi Zhao,Chenglin Zhang,Long-Fei Ren,Jiahui Shao
Janus charged nanofiltration (NF) membranes are appealing for efficient separation of both positively and negatively charged ions/molecules. Nevertheless, polyamide-based Janus charged membranes still face bottlenecks in engineering applications due to their poor fouling and chlorine resistance. To overcome this limitation, herein, bilayer heterostructured Janus charged NF membranes with a negatively charged non-polyamide outer selection layer and a positively charged polyamide inner selection layer were prepared via electrospray polymerization-based strategy for the first time. The evolutionary behavior of the mutually charge neutralization effect between two charged selection layers was explored. Results showed the membrane inner selection layer with denser cross-linked structures and lower positive charge densities exhibited a weak charge neutralization effect, leading to ∼90% rejection for both Na 2 SO 4 and MgCl 2 and >95% rejection for charged dyes. Impressively, the flux recovery rate of Janus NF membrane could reach 91.9% after three bovine serum albumin fouling cycles. More importantly, the non-polyamide outer selection layer could serve as an “armor” to safeguard polyamide inner selection layer, allowing Janus NF membranes to maintain a normalized salt rejection of 0.94 even under 12000 mg L −1 h chlorination conditions. Thus, this work provides an easy strategy for developing Janus NF membranes with high antifouling properties and chlorine resistance.
研究领域:
材料科学
·
化学工程
·
环境工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Zhixiao Liu,Yuhang Zhao,Mingli Yi,Lintao Liao,Yangyang Huang,Guangqiu Lei,Gao Hu,Mayu Lan,Huiping Li,Zhiming Mi
Antibiotics in water bodies pose a significant threat to the health of plants, animals, and humans, thereby contributing to severe ecological crises. Polyamide nanofiltration (NF) membranes are extensively employed for the separation and purification of antibiotics but are limited by relatively low permeation fluxes. In this study, three biobased phloretin derivatives—phloretin (Pt), phlorizin (Pz), and naringenin dihydrochalcone (Ng), were selected as water-phase monomers and reacted with trimesoyl chloride to fabricate three novel polyester NF membranes. The results demonstrated that the variations in the molecular structure gradients, including twisted conformation and molecular weight, of the three derivatives significantly influenced the structure and properties of polyester NF membranes. In-depth mechanistic analysis revealed that the diffusion rates (mainly related to molecular weight) of the three derivatives into the oil-phase solution, rather than their reactivity with TMC, governed the interfacial polymerization (IP) process. Consequently, Pt-based polyester NF membranes exhibited relatively dense layers compared to Pz- and Ng-based ones, achieving rejections of 92.4 % and 85.7 % for bacitracin and erythromycin, respectively, while maintaining a permeance of 35.2 L/m 2 h bar, which was significantly higher than that of conventional polyamide NF membranes. Meanwhile, the relatively loose structure of the Pz- and Ng-based polyester NF membranes made their permeance reach as high as 65.8 L/m 2 ·h·bar and 107.2 L/m 2 h bar, respectively, while maintaining intermediate separation level for five antibiotic molecules. Furthermore, the three polyester NF membranes demonstrated excellent chlorine resistance, antifouling properties, and good environmental adaptability. The three biobased polyester NF membranes in this study offer a novel approach for the development of high-flux NF membranes for antibiotic separation and other specialized scenarios. The correlation between the molecular structure of the derivatives and the membrane separation performance further deepens the understanding of polyester-based IP theory.
研究领域:
环境科学
·
材料科学
·
化学工程
·
膜技术
·
药学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xinyu Zhang,Chunhui Zhang,Zhenglun Lin,Xinsheng Luo,Jingtao Xu,XiaoXiang Cheng,Daoji Wu,Congwei Luo,Feiyong Chen
Reverse osmosis (RO) membrane technology encounters challenges such as membrane biofouling and oxidation during practical use, which significantly hinders its further development and application. To improve the chlorine and biofouling resistance of RO membrane, we suggest a method that modifies the mass ratios of zwitterionic and quaternary ammonium copolymers in the mussel-inspired coating layer. This method successfully controls the hydrophilicity and positive charge of the membrane surface, enhancing its overall performance. The plate counting results indicate that the bacterial killing efficiency of the blended modified TFC membrane (50:50) against E. coli and S. aureus is ≥98 %. Thanks to the combined effects of the anti-adhesion zwitterionic copolymer and the antibacterial quaternary ammonium copolymer, the blended modified TFC membrane (50:50) demonstrates superior anti-biofouling performance in dynamic biofouling tests. Furthermore, the desalination performance of the blending modified TFC membrane (50:50) remains stable after long-term exposure to 60,000 ppm·h of active chlorine, while the desalination performance of the pristine TFC membrane significantly declines. In conclusion, our advancements in chlorine-tolerant and anti-biofouling RO membranes could enhance the reliability of RO technology.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Xuewu Zhu,Feiyue Ge,Xinwei Kang,Liping Qiu,Jinyu Li,Xiaozhen Lu,Bin Liu,Daoji Wu,Zhe Yang,Daliang Xu
Conventional polyamide nanofiltration (NF) membranes face limitations in water treatment due to perm-selectivity trade-offs and chlorine sensitivity. This study introduced a phloroglucinol (PG) post-treatment strategy to construct polyester-polyamide interpenetrating network (IPN) NF membranes capable of overcoming these limitations. The IPN membranes featured a unique Turing surface morphology and a compact crosslinked network, which increased the effective filtration area while forming a thinner yet denser selective layer. This structural design enhanced hydrophilicity and negative surface charge, resulting in improved water permeance (24.5 L·m −2 ·h −1 ·bar −1 ) and a high organic matter rejection of 90.7 %. Notably, the modified membranes demonstrated remarkable chlorine stability, maintaining over 93 % of their initial rejection efficiency even after extreme chlorine exposure (20,000 ppm·h). This advancement addresses the rapid degradation of traditional polyamide membranes in chlorinated environments. Such extraordinary stability arises not only to from the inherent chlorine resistance of the polyester network but also from the multi-layered protective architecture enabled by the unique IPN configuration. The proposed IPN strategy provides an effective pathway for developing next-generation potable water treatment membranes.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Nan Yao,Shifeng Ji,Yunqing Xing,Jinchao Chen,Yanrui Cheng,Xiaonan Ruan,Jiaxin Chen,Zhuo Li,Yingjie Zhang,Chunmei Gao,Changbing Ye
This study reports the development and performance of a chlorine-resistant, negatively charged loose nanofiltration (LNF) membrane designed for efficient dye/salt separation from textile wastewater. The membrane was constructed by incorporating a synergistic composite of zeolitic imidazolate framework-L (ZIF-L) and polydopamine (PDA) into a polyamide layer on a polyethersulfone (PES) support via interfacial polymerization. In this design, ZIF-L nanosheets create a highly permeable, loose network, while PDA acts as a crucial molecular linker to ensure homogeneous dispersion and structural integration. Characterization using SEM, XRD, FTIR, XPS, and AFM confirmed successful synthesis. The optimal membrane, loaded with 2 wt% ZIF-L/PDA, exhibited superior performance: a pure water flux of 31.56 L·m −2 ·h −1 ·bar −1 , which is 3.19 times greater than the pristine Thin-Film Composite (TFC) membrane. This membrane achieved high dye rejection rates: Eriochrome Black T (99.25 %), Acid Chrome Blue K (97.87 %), Direct Blue 71 (97.56 %), Congo Red (94.09 %), and Direct Red 23 (93.92 %). Simultaneously, it showed low rejection for salts, indicating high permeability: NaCl (7.80 %), MgCl 2 (9.89 %), MgSO 4 (15.39 %), and Na 2 SO 4 (23.97 %). Crucially, the membrane demonstrated robust stability under diverse and harsh conditions, including exposure to strong acid, strong alkali, high pressure, and during long-term continuous operation, along with markedly enhanced chlorine resistance. Therefore, the ZIF-L/PDA loose NF membrane presents significant potential for dye wastewater treatment applications.
研究领域:
环境工程
·
膜科学与技术
·
化学工程
·
纳米技术
·
水处理
·
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）