Journal of Membrane Science Letters最新文献

Degradation of polycrystalline zeolitic imidazolate framework membrane under reactive plasma conditions

IF 4.9

Journal of Membrane Science Letters Pub Date : 2025-02-27 DOI: 10.1016/j.memlet.2025.100093

Hyungjoon Ji , Wooyoung Choi , Eunji Choi , Yunseong Ji , Minsu Kim , Hwan-Jin Jeon , Dae Woo Kim

{"title":"Degradation of polycrystalline zeolitic imidazolate framework membrane under reactive plasma conditions","authors":"Hyungjoon Ji , Wooyoung Choi , Eunji Choi , Yunseong Ji , Minsu Kim , Hwan-Jin Jeon , Dae Woo Kim","doi":"10.1016/j.memlet.2025.100093","DOIUrl":"10.1016/j.memlet.2025.100093","url":null,"abstract":"<div><div>Polycrystalline layers of metal-organic frameworks (MOFs) are effective for fabricating high-performance membranes, particularly for gas separation. However, the chemical degradation of these polycrystalline layers has not been extensively studied, though it is reasonable to anticipate severe degradation under harsh conditions. Accordingly, we investigated the mechanisms of morphological deformation and chemical structure changes in zeolite imidazolate framework (ZIF)-8 films under highly reactive conditions using plasma. ZIF-8 was selectively chosen among various MOFs due to its widespread use in gas separation applications and its relatively stable chemical bonds. The plasma generated various reactive species, such as ions and radicals, to accelerate the degradation of the ZIF-8 layer. We observed that reactive Ar ions preferentially etch Zn over C, and fluorine-containing radicals chemically react with Zn to form covalent bonds. Notably, we found that the degradation of the polycrystalline layer initially begins at the grain boundaries. However, as defects form on the grain surfaces, the degradation progresses more extensively within the grains than at the grain boundaries.</div></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"5 1","pages":"Article 100093"},"PeriodicalIF":4.9,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemically-driven solid oxide tubular membrane reactor for efficient separation of oxygen and argon

IF 4.9

Journal of Membrane Science Letters Pub Date : 2025-01-30 DOI: 10.1016/j.memlet.2025.100092

Yuanhui Tang , Yutao Hu , Sisi Wen , Song Lei , Yakai Lin , Li Ding , Haihui Wang

{"title":"Electrochemically-driven solid oxide tubular membrane reactor for efficient separation of oxygen and argon","authors":"Yuanhui Tang , Yutao Hu , Sisi Wen , Song Lei , Yakai Lin , Li Ding , Haihui Wang","doi":"10.1016/j.memlet.2025.100092","DOIUrl":"10.1016/j.memlet.2025.100092","url":null,"abstract":"<div><div>The high purity of Ar is crucial for industrial applications such as steel production, welding, and laboratory use, while the similar physical properties of O<sub>2</sub> and Ar make their efficient separation challenging. Existing technologies, such as cryogenic distillation and pressure swing adsorption, are well-established and widely utilized but are hindered by high energy consumption, operational complexity, or limited efficiency. Inspired by the principle that O<sub>2</sub> can permeate through the electrolyte as oxygen ions (O<sup>2-</sup>) in a solid oxide electrolysis cell, for the first time, this study designed and developed an electrochemically-driven tubular inorganic membrane reactor to separate O<sub>2</sub>/Ar mixtures, achieving high-purity Ar (≥99.99 %). The tubular membrane reactor featured an anode/electrolyte/cathode sandwich structure, offering a compact design particularly suited for gas separation. The reactor employs Ce<sub>0.1</sub>Gd<sub>0.9</sub>O<sub>2-x</sub> (GDC) as the electrolyte, while GDC and Ba<sub>0.9</sub>Co<sub>0.7</sub>Fe<sub>0.3</sub>Nb<sub>0.1</sub>O<sub>3-x</sub> are used as the electrode materials. The resulting membrane reactor was compact, defect-free, and capable of producing Ar with a purity of 99.99 %. Additionally, under a constant total current of 0.75 A and an operating temperature of 800 °C, the membrane reactor demonstrated stable performance for over 130 hours, maintaining a Faradaic efficiency exceeding 95 %. This study anticipates that the membrane reactor can serve as an effective and practical solution for separating O<sub>2</sub>/Ar mixtures, particularly at low O<sub>2</sub> partial pressures.</div></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"5 1","pages":"Article 100092"},"PeriodicalIF":4.9,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143292745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Membrane gas separations and energy efficiency: Exploring the selective membrane-piston concept

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-12-21 DOI: 10.1016/j.memlet.2024.100091

Mathilde Lafont, Christophe Castel, Romain Privat, Eric Favre

引用次数: 0

Reliable methods to determine experimental energy barriers for transport in salt-rejecting membranes

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-12-10 DOI: 10.1016/j.memlet.2024.100090

Mohammad Allouzi , Mor Avidar , Liat Birnhack , Razi Epsztein , Anthony P. Straub

{"title":"Reliable methods to determine experimental energy barriers for transport in salt-rejecting membranes","authors":"Mohammad Allouzi , Mor Avidar , Liat Birnhack , Razi Epsztein , Anthony P. Straub","doi":"10.1016/j.memlet.2024.100090","DOIUrl":"10.1016/j.memlet.2024.100090","url":null,"abstract":"<div><div>Understanding the transport mechanisms in salt-rejecting membranes is critical for improving their separation efficiency and selectivity. Examining transmembrane permeation in terms of energy barriers using the Arrhenius or Eyring approach provides valuable insights into molecular transport within the membrane and at the solution-membrane interfaces. Although useful insights have been gained using the energy barriers framework, which is based on measuring permeability at different temperatures, the method can sometimes show counterintuitive and inconsistent results. In this study, we examine methods to improve the reliability of experimentally obtained energy barriers for transport in salt-rejecting membranes. We first compile energy barrier results for the transport of various solutes in loose and tight salt-rejecting membranes, observing data variability across studies and a weak correlation between energy barriers and membrane type. Next, we demonstrate the importance of thermally stabilizing membranes prior to experimentally evaluating energy barriers, showing that membranes equilibrated at high temperatures and tested with descending temperature produce more stable and reliable trends. In addition to thermal stabilization, we identify that comparing energy barrier values based on a similar concentration polarization modulus is critical when analyzing trends between different solutes and membranes. Following these recommendations, we obtain energy barriers for ion permeation that align with the performance of loose and tight salt-rejecting membranes. We conclude by demonstrating consistent and rational energy barrier measurements in two independent laboratories using the principles discussed. Overall, this study provides important guidelines for the experimental quantification of energy barriers for transport in salt-rejecting membranes.</div></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"5 1","pages":"Article 100090"},"PeriodicalIF":4.9,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low-temperature rapid fabrication of crosslinked poly(quaterphenyl piperidine) membrane for anion exchange membrane water electrolyzers

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-11-30 DOI: 10.1016/j.memlet.2024.100089

Du Ru Kang , Gi Hyo Sim , Minjoong Kim , Jae Hun Lee , Jong Hak Kim

{"title":"Low-temperature rapid fabrication of crosslinked poly(quaterphenyl piperidine) membrane for anion exchange membrane water electrolyzers","authors":"Du Ru Kang , Gi Hyo Sim , Minjoong Kim , Jae Hun Lee , Jong Hak Kim","doi":"10.1016/j.memlet.2024.100089","DOIUrl":"10.1016/j.memlet.2024.100089","url":null,"abstract":"<div><div>While nonsolvent-induced phase separation (NIPS) is widely recognized as an established method for creating porous polymer membranes, this study uniquely employs a nonsolvent to produce a dense, nonporous membrane instead. Specifically, the membranes were rapidly fabricated at low temperatures using dimethyl sulfoxide (DMSO), a high-boiling-point solvent, and water as the nonsolvent. We successfully prepared a series of crosslinked poly(quaterphenyl piperidine) (PQP-BM) network membranes with high crosslinking degrees (up to 47.2 %). By combining a hydrophobic extended polyaromatic backbone with a hydrophilic piperidine-based crosslinker, we achieved distinct microphase separation, which enhanced ion transport, dimensional stability, and thermal and mechanical properties compared to the linear uncrosslinked membranes. The optimized AEM exhibited exceptional mechanical strength (tensile strength >63 MPa), high ion conductivity (151.5 mS cm⁻¹ at 80 °C), and excellent alkaline durability. In single-cell water electrolyzer tests, the PQP-BM membrane demonstrated a remarkable current density of 3.99 A cm⁻² at 2.0 V in 1 M KOH at 50 °C, outperforming the commercial FAA-3–50 membrane by 126 %. This study highlights the potential of the energy-efficient NIFF process as a scalable method for producing advanced AEMs for energy conversion applications.</div></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"5 1","pages":"Article 100089"},"PeriodicalIF":4.9,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Engineering bio-inert and thermostable poly(vinylidene difluoride) membranes by grafting thermal-tolerant copolymers via ring-opening reaction

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-11-24 DOI: 10.1016/j.memlet.2024.100088

Irish Valerie Maggay, Ying-Tzu Chiu, Hao-Tung Lin, Antoine Venault, Yung Chang

{"title":"Engineering bio-inert and thermostable poly(vinylidene difluoride) membranes by grafting thermal-tolerant copolymers via ring-opening reaction","authors":"Irish Valerie Maggay, Ying-Tzu Chiu, Hao-Tung Lin, Antoine Venault, Yung Chang","doi":"10.1016/j.memlet.2024.100088","DOIUrl":"10.1016/j.memlet.2024.100088","url":null,"abstract":"<div><div>This study explores the development of a thermostable and bio-inert PVDF membrane by grafting poly(acrylamide-<em>r</em>-N-vinylpyrrolidone) (P(AA-<em>r</em>-NVP)) onto a styrene-<em>co</em>-maleic anhydride (SMA)-functionalized PVDF substrate. The fabrication process involved blending SMA into the PVDF matrix followed by vapor-induced phase separation process to form the porous membrane. P(AA-<em>r</em>-NVP) was then grafted onto the membrane through the ring-opening of maleic anhydride groups. Characterization through ATR-FTIR and XPS confirmed successful surface modification. Antifouling performance of the membranes were assessed through bacterial adhesion tests before and after steam sterilization. Before sterilization, SMA3_A3V7 effectively resisted up to 97 % of <em>E. coli</em> adhesion. After steam sterilization, SMA3_A3V7 demonstrated excellent thermal stability, with a minimal 1.25 % increase in bacterial adhesion, compared to a 250 % increase in the unmodified PVDF membrane. These findings feature the effectiveness of utilizing SMA in simplifying the grafting process and the contribution of the thermostable and bio-inert polymer in imparting high-temperature resistance and antifouling resistance to the membrane, enabling versatile applications.</div></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"5 1","pages":"Article 100088"},"PeriodicalIF":4.9,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automated membrane characterization: In-situ monitoring of the permeate and retentate solutions using a 3D printed permeate probe device 自动化膜表征：使用 3D 打印渗透探针装置现场监测渗透液和回流液

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-09-28 DOI: 10.1016/j.memlet.2024.100087

Jonathan Aubuchon Ouimet, Faraj Al-Badani, Xinhong Liu, Laurianne Lair, Zachary W. Muetzel, Alexander W. Dowling, William A. Phillip

{"title":"Automated membrane characterization: In-situ monitoring of the permeate and retentate solutions using a 3D printed permeate probe device","authors":"Jonathan Aubuchon Ouimet, Faraj Al-Badani, Xinhong Liu, Laurianne Lair, Zachary W. Muetzel, Alexander W. Dowling, William A. Phillip","doi":"10.1016/j.memlet.2024.100087","DOIUrl":"10.1016/j.memlet.2024.100087","url":null,"abstract":"<div><div>Self-driving laboratories and automated experiments can accelerate the design workflow and decrease errors associated with experiments that characterize membrane transport properties. Within this study, we use 3D printing to design a custom stirred cell that incorporates inline conductivity probes in the retentate and permeate streams. The probes provide a complete trajectory of the salt concentrations as they evolve over the course of an experiment. Here, automated diafiltration experiments are used to characterize the performance of commercial NF90 and NF270 polyamide membranes over a predetermined range of KCl concentrations from 1 to 100 mM. The measurements obtained by the inline conductivity probes are validated using offline post-experiment analyses. Compared to traditional filtration experiments, the probes decrease the amount of time required for an experimentalist to characterize membrane materials by more than 50× and increase the amount of information generated by 100×. Device design principles to address the physical constraints associated with making conductivity measurements in confined volumes are proposed. Overall, the device developed within this study provides a foundation to establish high-throughput, automated membrane characterization techniques.</div></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 2","pages":"Article 100087"},"PeriodicalIF":4.9,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced phosphate anion flux through single-ion, reverse-selective mixed-matrix cation exchange membrane 通过单离子反向选择混合基质阳离子交换膜提高磷酸盐阴离子通量

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-09-26 DOI: 10.1016/j.memlet.2024.100086

Xinyi Wang , Minhao Xiao , Sungsoon Kim , Jeffrey Zhang , Minju Cha , Anya Dickinson-Cove , Fan Yang , Kenji Lam , Sungju Im , Ziwei Hou , Jishan Wu , Zhiyong Jason Ren , Christos T. Maravelias , Eric M.V. Hoek , David Jassby

{"title":"Enhanced phosphate anion flux through single-ion, reverse-selective mixed-matrix cation exchange membrane","authors":"Xinyi Wang , Minhao Xiao , Sungsoon Kim , Jeffrey Zhang , Minju Cha , Anya Dickinson-Cove , Fan Yang , Kenji Lam , Sungju Im , Ziwei Hou , Jishan Wu , Zhiyong Jason Ren , Christos T. Maravelias , Eric M.V. Hoek , David Jassby","doi":"10.1016/j.memlet.2024.100086","DOIUrl":"10.1016/j.memlet.2024.100086","url":null,"abstract":"<div><div>Phosphate recovery from wastewater is vital for both environmental sustainability and resource conservation, offering the dual benefit of reducing phosphate pollution while providing a valuable source of this essential nutrient. We previously reported an approach for synthesizing hydrous manganese oxide (HMO) nanoparticles within a polymeric cation-exchange membrane (CEM) to achieve a phosphate-selective mixed-matrix membrane (PhSMMM); however, the phosphate flux was lower than desired. Herein, we demonstrate a next-generation PhSMMM membrane with enhanced phosphate flux and selectivity. Experimental results confirm the successful incorporation of up to 28 wt% HMO nanoparticles into the polymeric CEM. The new PhSMMM exhibits a phosphate flux of 1.57 mmol∙m<sup>–2.</sup>hr<sup>–1</sup> (an 8.5X enhancement), with selectivity over chloride, nitrate, and sulfate ions of 9, 11, and 104, respectively. This significant enhancement in phosphate flux marks a promising advancement in a sustainable solution for phosphate removal and recovery from wastewater.</div></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 2","pages":"Article 100086"},"PeriodicalIF":4.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermodynamic efficiency of membrane separation of dilute gas: Estimation for CO2 direct air capture application 稀释气体膜分离的热力学效率：二氧化碳直接空气捕获应用估算

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-09-19 DOI: 10.1016/j.memlet.2024.100085

Masaki Kato , Teruki Ando , Cho Rong Kim , Seiya Yokokura , Hiroki Waizumi , Toshihiro Shimada

引用次数: 0

The solution-diffusion model: “Rumors of my death have been exaggerated” 溶液扩散模型"我的死讯被夸大了"

IF 4.9

Journal of Membrane Science Letters Pub Date : 2024-09-07 DOI: 10.1016/j.memlet.2024.100084

Viatcheslav Freger , Guy Z. Ramon

{"title":"The solution-diffusion model: “Rumors of my death have been exaggerated”","authors":"Viatcheslav Freger , Guy Z. Ramon","doi":"10.1016/j.memlet.2024.100084","DOIUrl":"10.1016/j.memlet.2024.100084","url":null,"abstract":"<div><p>The solution-diffusion (SD) model has been instrumental in the advancement of membrane science, due to its simplicity, transparency, and utility in process engineering. However, some doubts have recently been raised, concerning the fundamental validity of SD. These have largely been based on apparent discrepancies between molecular dynamics simulations and several features, deemed inherent to SD, that appeared in early reports — namely, the exact nature of the pressure and concentration distributions within the membrane. Herein, we re-visit the underlying physics of SD in the context of composite membranes, making no a-priori assumptions and, particularly, highlighting the role of polymer thermodynamics and the mechanics of a loaded, swollen film, supported by a porous substrate. The analysis provides a coherent view, linking the solvent concentration profile within the film and the resultant flux-pressure relations with the polymer rigidity and, importantly, the way in which the film is supported. It is shown that, although the flux may generally vary non-linearly with the feed pressure and depend on the film-support geometry, for rigid films – most common in real operations – SD predicts a linear behavior, virtually independent of specific geometry and pressure distribution. Moving forward, we stress the importance and need for further refinements of the SD model, driven by insight from molecular dynamics, thermodynamics and mechanics, while maintaining its applicability to process design.</p></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"4 2","pages":"Article 100084"},"PeriodicalIF":4.9,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772421224000187/pdfft?md5=3aef864909003eb19f6cf1bca2828a98&pid=1-s2.0-S2772421224000187-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0