Journal of Membrane Science最新文献

{"title":"Optimizing hollow fiber membrane oxygenators: A multi-objective approach for improved gas exchange and reduced blood damage","authors":"Seyyed Hossein Monsefi Estakhrposhti ,&nbsp;Jing Jing Xu ,&nbsp;Margit Gföhler ,&nbsp;Michael Harasek","doi":"10.1016/j.memsci.2025.124228","DOIUrl":"10.1016/j.memsci.2025.124228","url":null,"abstract":"<div><div>Extracorporeal Membrane Oxygenation provides life-saving support for patients with severe heart and lung dysfunction; however, its implementation is associated with significant complications, including hemolysis and thrombosis. These complications address the need for an improved design of hollow fiber membrane oxygenators. This study presents a multi-objective optimization framework aiming to enhance the gas exchange efficiency while minimizing blood damage. A 2D computational fluid dynamics model, validated with micro-PIV measurements, was developed to simulate 200 fiber configurations defined by three geometric parameters (fiber diameter, distance-to-diameter ratio, and angle) and a flow parameter (blood flow rate). Specific CO₂ removal, dead-zone-to-total-area ratio, and hemolysis index were established as objectives, representing gas exchange efficiency, thrombosis potential within the membrane module, and hemolysis, respectively. Objectives were modeled using multivariate polynomial functions with unknown exponents and determined using the modified enhanced Jaya algorithm. Single-objective and multi-objective optimization were performed using Pareto front solutions, followed by weighted sum and goal programming methods to identify optimal arrangements. The findings demonstrated that the maximum obtained specific CO₂ removal, dead-zone-to-total-area ratio, and hemolysis index are 250.3 mL_CO₂ min^-1 m^-2, 0.0254 %, and 0.011 <span><math><mrow><mo>×</mo></mrow></math></span> 10⁻³ %, respectively. Furthermore, this study identifies the distance-to-diameter ratio as the key factor affecting all the objectives. Finally, the calculated optimal configuration from both weighted sum and goal programming methods suggests that the best configuration includes low angle, small diameter, and relatively moderate distance-to-diameter ratio, and high blood flow rate.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"731 ","pages":"Article 124228"},"PeriodicalIF":8.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two-step activation of SSZ-13 zeolite membranes for mild template removal and enhanced CO2/C2H6 separation","authors":"Weibo Chen ,&nbsp;Feng Ye ,&nbsp;Shuanshi Fan,&nbsp;Yanhong Wang,&nbsp;Xuemei Lang,&nbsp;Gang Li","doi":"10.1016/j.memsci.2025.124231","DOIUrl":"10.1016/j.memsci.2025.124231","url":null,"abstract":"<div><div>Activation plays a crucial role in determining the final performance of zeolite membranes, and therefore, developing an effective activation technique to achieve both high permeance and high selectivity is highly desirable. In the present study, a promising two-step activation strategy, consisting of a hydrocracking step followed by an oxidation step, has been proposed to fabricate high-performance SSZ-13 zeolite membranes for CO₂/C₂H₆ separation. Compared to the single-step hydrocracking or oxidation activation, the two-step activation strategy enabled much more effective removal of the organic template from the SSZ-13 zeolite channels at a significantly lower temperature, despite identical activation conditions, except for the atmosphere. This led to improved CO₂ permeance and CO₂/C₂H₆ selectivity, owing to the more efficient removal of the template. It was confirmed that C₂H₆ preferentially adsorbs in the SSZ-13 zeolite pores, resulting in reduced CO₂ permeance and CO₂/C₂H₆ selectivity during CO₂/C₂H₆ mixed-gas separation compared to single-gas permeation. Furthermore, the CO₂ permeation mechanism shifted from surface diffusion to activated diffusion due to the narrowing of the zeolite pores after C₂H₆ adsorption. These findings highlight the potential of the proposed two-step activation strategy for developing high-quality zeolite membranes and provide a promising solution for enhancing CO₂/C₂H₆ separation in mixed-gas separations by modifying C₂H₆ adsorption in the zeolite pores.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"731 ","pages":"Article 124231"},"PeriodicalIF":8.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Superior He/CH4 separation properties of crosslinked thermally rearranged membranes obtained by direct fluorination strategy","authors":"Xuepeng Li ,&nbsp;Chulong Chen ,&nbsp;Luxin Sun ,&nbsp;Congcong Wu ,&nbsp;Aqib Riaz ,&nbsp;Zelong Xu ,&nbsp;Kai Song ,&nbsp;Xiaohua Ma","doi":"10.1016/j.memsci.2025.124230","DOIUrl":"10.1016/j.memsci.2025.124230","url":null,"abstract":"<div><div>Recovering of helium (He) from natural gas is a practical approach, but the key challenge lies in developing of membrane materials that simultaneously offer high He permeability and excellent He/CH₄ selectivity. In this work, we directly fluorinated a crosslinked thermally rearranged (FCTR) polymer membrane. The resulting FCTR membranes exhibited outstanding He/CH₄ separation performance. Particularly, the fluorinated layer of FCTR-60 achieved a high He permeability of 435 Barrer and an exceptional He/CH₄ selectivity of 7103, surpassing most reported polymer membranes and exceeding latest the perfluoropolymer upper bound. Owing to fluorine substitution and the introduction of a crosslinked structure, the membrane exhibited excellent stability and resistance to aging. The high He permeability can be attributed to the inherent microporosity of the CTR membrane, while the exceptional He/CH₄ selectivity arised from the fluorination-induced restriction of CH₄ diffusion. This work provides a broad prospect for membrane-based He recovery applications.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"731 ","pages":"Article 124230"},"PeriodicalIF":8.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of ceramic substrate pore size on the structure and performance of polyamide nanofiltration membrane via interfacial polymerization","authors":"Yuanchuan Liao,&nbsp;Nengwen Gao,&nbsp;Qihong Zhao,&nbsp;Xiaoli Wang,&nbsp;Shumin Lin","doi":"10.1016/j.memsci.2025.124227","DOIUrl":"10.1016/j.memsci.2025.124227","url":null,"abstract":"<div><div>Thin-film composite (TFC) membranes prepared by interfacial polymerization (IP) have been widely used in wastewater treatment. The substrate pore size plays a critical role on the polyamide (PA) membrane performance. Herein, a variety of PA nanofiltration (NF) membranes on ceramic substrate with different pore size (5 nm (CM-5), 20 nm (CM-20), 50 nm (CM-50), and 200 nm (CM-200)) are successfully prepared via IP. The results depict that substrates with smaller pores have less absorption capacity of the aqueous monomer (piperazine). Reducing ceramic substrate pore size from 200 nm to 5 nm, the formed PA layer transforms from cracked “ridge-and-valley\" structure to continuous film. Cross-sectional FESEM images further demonstrate that the PA layer thickness decreases from 106 nm to 29 nm. The pore size of the polyamide membrane on CM-20 is 0.17 nm with a water permeance of 27.3 L m⁻² h⁻¹ bar⁻¹ and Na₂SO₄ rejection of ∼96 %. A smaller pore size of the ceramic substrate might reduce the available space for monomer movement, increasing the collision and reaction between the monomers, which leads to an elevated cross-linking degree of PA (a denser PA layer). Based on the nanofiltration performance, a ceramic substrate with pore size of 20 nm is optimal for the TFC membrane preparation. The obtained membrane keeps stable performance during 72 h operation. The obtained membrane also demonstrates excellent stability in high-temperature environment and in organic solvent. Overall, ceramic substrate with pore size of 20 nm is selected for the preparation of PA NF membrane via IP. The obtained membrane has broad applications in desalination and environmental remediation.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"731 ","pages":"Article 124227"},"PeriodicalIF":8.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrafast fabrication of uniform nanoporous α-alumina membranes by photothermal-enhancing","authors":"Weida Shi,&nbsp;Yulong Xie,&nbsp;Huiping Zhang,&nbsp;Juanjuan Wen,&nbsp;Kaiyun Fu,&nbsp;Xianfu Chen,&nbsp;Minghui Qiu,&nbsp;Yiqun Fan","doi":"10.1016/j.memsci.2025.124226","DOIUrl":"10.1016/j.memsci.2025.124226","url":null,"abstract":"<div><div>Ceramic ultrafiltration membranes have attracted significant attention in bioproduct manufacturing due to their excellent biocompatibility and durability. However, traditional fabrication process involves high temperatures and prolonged heat treatments, which results in grain growth, particle sintering, and pore coalescence, eventually affecting separation efficiency. This study proposes an ultrafast fabrication method through the photothermal-enhanced rapid thermal process. By doping alumina sol with iron element, light-absorbing intensity can be increased by 7–21 times, significantly enhancing its photothermal effect under near-infrared radiation and shortening the heat treatment cycle. Additionally, the α-Fe₂O₃ formed during calcination promoted α-Al₂O₃ transition via a heterogeneous nucleation mechanism, effectively suppressing grain growth and sintering. Under optimized conditions —a heat treatment cycle of 115 s and a temperature of 850 °C—α-Al₂O₃ tight ultrafiltration membranes were rapidly fabricated. The membrane exhibited a dextran molecular weight cutoff (MWCO) of 13.9 kDa and a pure water permeability of 220 LMH/bar. In enzyme-membrane coupling tests, the membrane demonstrated precise permeation of bioactive peptides with molecular weights between 200 and 1700 Da (&gt;98 wt%) while retaining peptides with molecular weights exceeding 2200 Da.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"731 ","pages":"Article 124226"},"PeriodicalIF":8.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular hybridization enhanced polyamide nanofiltration membranes for antibiotic desalination","authors":"Hoei Ying Lim,&nbsp;Xiao-Gang Jin,&nbsp;Xiao-Hua Ma,&nbsp;Zhen-Liang Xu","doi":"10.1016/j.memsci.2025.124225","DOIUrl":"10.1016/j.memsci.2025.124225","url":null,"abstract":"<div><div>Antibiotic desalination is a critical process for isolating and purifying target compounds, ensuring their stability and therapeutic efficacy. However, the efficiency and scalability of conventional nanofiltration membranes are often limited by the trade-off between permeability and selectivity. In this study, a molecular hybridization strategy is employed, combining 1,4,7,10 tetraazacyclododecane (Cyclen) with piperazine (PIP) to react with trimesoyl chloride (TMC). This approach aims to create a looser polyamide structure and enhance performances in antibiotic desalination. The results demonstrate that the modified membranes achieve a water permeance of 25.2 L m⁻² h⁻¹ bar⁻¹, nearly twice that of the control membrane (12.2 L m⁻² h⁻¹ bar⁻¹). Additionally, the modified membranes exhibit a NaCl/tetracycline selectivity of 58.8, along with exceptional performance in consecutive concentration experiments, where tetracycline concentration increases by 4.65-fold, significantly exceeding that of the control membrane (by 1.43-fold). The proposed modification strategy demonstrates significant potential for advancing nanofiltration membrane performance in antibiotic desalination, offering a viable pathway to overcome existing limitations and enhancing scalability for industrial implementation.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"731 ","pages":"Article 124225"},"PeriodicalIF":8.4,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Drying polymer membranes for preservation: a review","authors":"Simon Van Buggenhout,&nbsp;Rhea Verbeke,&nbsp;Douglas M. Davenport,&nbsp;Ivo F.J. Vankelecom","doi":"10.1016/j.memsci.2025.124190","DOIUrl":"10.1016/j.memsci.2025.124190","url":null,"abstract":"<div><div>Preservation is essential to safeguard the performance and structural integrity of membranes post-preparation <em>i.e.,</em> during module assembly, transport, and storage in industrial-scale membrane manufacturing. This review synthesises insights from scientific literature, commercial datasheets and patents to identify the most promising preservation procedures for industrial membrane production. First, membrane drying is highlighted as a more efficient route over wet membrane preservation due to easier membrane handling and transport, avoiding the need for biocides while ensuring optimal membrane-adhesive compatibility. However, pore collapse and membrane embrittlement occur during membrane drying, deteriorating respectively filtration performance and membrane integrity. Second, a fundamental understanding of membrane drying is established in which the pore collapse model is revisited to correct the definition of capillary force and account for the surface tension force. Third, three methods for dry preservation are critically reviewed <em>i.e.,</em> solvent exchange, use of pore preserving agents (PPAs), and freeze-drying. PPAs combine the most attractive properties as they best preserve the membrane performance, offset brittleness, enable the most straightforward application, are the greenest option, and impose the lowest cost, hence justifying their position as state-of-the-art preservation technique. Finally, potential shortcomings of current preservation procedures are identified through a survey among a selection of membrane industry professionals, revealing long-term preservation stability and waste reduction as important areas of interest which should be addressed in future research.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"731 ","pages":"Article 124190"},"PeriodicalIF":8.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Micro-nanobubbles to alleviate ultrafiltration membrane fouling for biogas slurry concentration and nutrient enrichment: Performance and molecular mechanisms","authors":"Wancen Liu ,&nbsp;Ruohan Xia ,&nbsp;Chuanren Qi ,&nbsp;Ashley J. Ansari ,&nbsp;Long D. Nghiem ,&nbsp;Xiaofei Duan ,&nbsp;Yun Li ,&nbsp;Guoxue Li ,&nbsp;Wenhai Luo","doi":"10.1016/j.memsci.2025.124221","DOIUrl":"10.1016/j.memsci.2025.124221","url":null,"abstract":"<div><div>This study evaluated the performance of micro-nanobubbles (MNBs) to mitigate membrane fouling during ultrafiltration (UF) concentration of chicken manure biogas slurry. Molecular characteristics of organic foulants in biogas slurry were examined to elucidate the underlying mechanisms. Results showed that MNBs pre-treatment of biogas slurry could reduce membrane fouling and improve fouling reversibility during subsequent UF concentration using oxygen as the gas source. MNBs increased the molecular number of dissolved organic matter (DOM) and thermodynamic instability, and reduced the particle size of biogas slurry. As a result, organic foulants, mainly including lignin, lipids, and protein/amino sugar, rapidly attached onto the membrane surface to form a thick but highly reversible fouling layer. Irreversible foulants mainly caused by inorganic foulants were alleviated due to MNB pretreatment to decrease carboxylic groups in biogas slurry to break the interaction between DOM and cations in inorganic foulants. The weakened cation-DOM interaction could be related to the reduction in calcium bridging with humic-like substances as well as electrostatic shielding between potassium and humic-like/fulvic-like substances. As such, the water flux and its recovery after regular cleaning were enhanced by 58.1% and 19.6% in UF operation, respectively, when MNBs was used for biogas slurry pre-treatment.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"731 ","pages":"Article 124221"},"PeriodicalIF":8.4,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of ultra-permeable micelle-based isoporous membranes","authors":"Feng Cheng ,&nbsp;Haile Shen ,&nbsp;Mingfan Yue ,&nbsp;Haizhou Yu ,&nbsp;Xiaoyan Qiu","doi":"10.1016/j.memsci.2025.124213","DOIUrl":"10.1016/j.memsci.2025.124213","url":null,"abstract":"<div><div>Membrane separation technology has garnered significant interest due to its energy efficiency, environmental benefits, and molecular sieving capabilities. Polymeric membranes, despite their cost-effectiveness and processability, face challenges in balancing water permeance and selectivity, primarily due to non-uniform or sparse pore structures. Block copolymer (BCP)-based isoporous membranes, fabricated via strategies like the self-assembly and non-solvent-induced phase separation (SNIPS), offer improved pore uniformity and separation performance. This work introduces an alternative strategy to produce isoporous membranes by combining phase separation and surface tension driven micelle spreading at the air/water interface. The resulting membranes feature ordered isopores (<em>ca.</em> 10 nm) and exceptional water permeance (<em>ca.</em> 1450 L m⁻² h⁻¹ bar⁻¹), enabling precise nanoparticle separation. The membrane demonstrates stability under 20 psi pressure, with tunable thickness (via micellar solution volume) and pore size (via water temperature). The work advances the design of high-performance isoporous membranes, offering potential applications in ultrafiltration, biotechnology, and environmental remediation.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"731 ","pages":"Article 124213"},"PeriodicalIF":8.4,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CoFeMn layered double hydroxide-based nanoconfined gravity-driven catalytic membrane for efficient water decontamination: Performance and mechanistic insight","authors":"Jiahui Zhang ,&nbsp;Imtiaz Afzal Khan ,&nbsp;Hongyi Zhang ,&nbsp;Zhen Chen ,&nbsp;Zhenghua Zhang","doi":"10.1016/j.memsci.2025.124212","DOIUrl":"10.1016/j.memsci.2025.124212","url":null,"abstract":"<div><div>Heterogeneous Fenton-like catalysis using peroxymonosulfate (PMS) faces significant challenges in pollutant removal due to mass transfer limitation and inefficient reactive oxygen species generation. To address these issues, a novel trimetallic (CoFeMn) layered double hydroxide (LDH) membrane was fabricated, integrating nanoconfined catalysis with membrane filtration. This CoFeMn LDH membrane/PMS system achieved complete ranitidine degradation, with a first order rate constant of 4 ms⁻¹, while maintaining a stable gravity-driven permeate flux of 21 LMH. Notably, this performance surpasses the batch-scale system by exhibiting 2.79 × 10⁵ times higher rate constant and outperforms state-of-the-art catalytic membranes by 1–4.5 orders of magnitude. Density functional theory calculations revealed a high PMS adsorption energy on the CoFeMn LDH membrane (<em>E</em>_ads = −3.84 eV), indicating superior chemisorption, and confirmed rapid charge transfer mechanism with electron transfer from CoFeMn LDH to PMS (1.014 e). Furthermore, nanoconfinement within the CoFeMn LDH membrane nanochannels significantly enhanced the degradation of pharmaceuticals and endocrine-disrupting chemicals, providing stable performance for 100 h continuous operation. This study demonstrates the potential of trimetallic LDH-based catalytic membranes for sustainable and efficient water purification.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"730 ","pages":"Article 124212"},"PeriodicalIF":8.4,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}