Journal of Membrane Science最新文献

{"title":"Fluorinated β-CD-MOF strengthened 2-phenylethanol pervaporation separation of mixed matrix membranes","authors":"Yonghong Wang ,&nbsp;Yisheng Guang ,&nbsp;Xinru Zhang ,&nbsp;Jinping Li","doi":"10.1016/j.memsci.2025.124193","DOIUrl":"10.1016/j.memsci.2025.124193","url":null,"abstract":"<div><div>Beta-cyclodextrin metal-organic framework (β-CD-MOF) is porous crystalline material formed by coordinating β-cyclodextrin with potassium ion, which can significantly enhance the pervaporation separation performance of mixed matrix membranes (MMMs). However, achieving MMMs with high 2-phenylethanol (2-PE) pervaporation separation performance poses challenges due to the lack of affinity sites. Herein, β-CD-MOF was modified with 3-glycidoxypropyltrimethoxysilane (KH560) to prepare KH560-functionized β-CD-MOF (K-βMOF). Subsequently, fluorinated β-CD-MOF (F–K-βMOF) was prepared via a ring-opening reaction between the epoxy groups of K-βMOF and amine groups of 1,4-bis(4-amino-2-trifluoromethylphenoxy) benzene. Then, MMMs were fabricated by incorporating F–K-βMOF into a PDMS matrix, which exhibited excellent 2-PE pervaporation separation performance, achieving a total flux of 1226 g m⁻² h⁻¹, a separation factor of 31.83, and a pervaporation separation index of 37807 g m⁻² h⁻¹. These values were 1.48, 2.67, and 4.23 times higher than those of the pure PDMS membrane, and 1.29, 1.74, and 2.23 times higher than those of MMMs containing β-CD-MOF, respectively. This is because –CF₃ groups and benzene ring in F–K-βMOF enhance the affinity for 2-PE through hydrogen bonding, hydrophilic-hydrophobic and π-π interactions. When the concentration of maltol in the 2-PE aqueous solution increased to 1200 ppm, the flux and separation factor of 2-PE decreased by 39 % and 37 %, respectively. The separation factor of 2-PE decreased from 31 to 20, which was still higher than that of maltol, indicating that MMMs exhibited efficient molecular recognition capability. Furthermore, MMMs exhibited exceptional durability during 168 h testing, highlighting a great potential for 2-PE separation in industrial application.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"730 ","pages":"Article 124193"},"PeriodicalIF":8.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935437","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":"Porous membranes of polymer blends and their use as functional separators for electrochemical batteries","authors":"Víctor Gregorio ,&nbsp;Jin Hyun Chang ,&nbsp;Nuria García ,&nbsp;Pilar Tiemblo","doi":"10.1016/j.memsci.2025.124187","DOIUrl":"10.1016/j.memsci.2025.124187","url":null,"abstract":"<div><div>This works explores the synthesis of a porous membrane concept combining two polymers: one with a structural role which constitutes the scaffold of the membrane, and the other with the capacity to form a polymer gel with ad-hoc liquids at the pores and surface of the membrane. After liquid infiltration, the structural polymer keeps the mechanical properties and dimensional stability of the membrane constant, i.e. no swelling, for long time periods, while the soluble polymer forms a gel at the pores and membrane surface. In this work, the goal of these membranes is that of a functional separator able to produce semisolid electrolytes by in-situ gel formation upon soaking with liquid electrolytes at electrochemical cells. This functional separator enables the formation of the semisolid electrolyte without modification of the electrochemical cells industrial processes, and avoiding the handling of UHMW gels at an industrial scale. Functional separators comprising polycarbonate (PC) as the structural scaffold and ultrahigh molecular weight (UHMW) polyethylene oxide (PEO) as the soluble polymer for in-situ gel formation are prepared by adapting the non-solvent induced phase separation (NIPS) process to the simultaneous coagulation of the two polymers. The polymer distribution, pore morphology depend on the experimental conditions, especially on the PC/PEO degree of mixing before coagulation. The polymer distribution permits the formation of PEO gel at the pores of the PC scaffold, thus combining the electrochemical properties of UHMW polymer gel electrolytes, with the chemical and mechanical resistance of PC. Moreover the presence of PEO enables the wetting of the PC scaffold (otherwise hydrophobic) with hydrophilic electrolytes such as aqueous ZnCl₂, the Zn eutectic acetamide Zn(TFSI)₂ (ACE-Zn) and the chloroaluminate acetamidine-AlCl₃, selected in this work to showcase the separators’ versatility, which do not do not swell, break, or degrade after months soaked in the electrolytes. Symmetric Zn||Zn cells were built using the electrolyte ACE-Zn soaked in PC/PEO membranes (40 μm) and in a 100 μm glass fiber separator. While the latter short-circuited before 150 cycles, functional separators endured 300 cycles with no short-circuiting, proving the formation of the UHMW PEO gel at the functional separators and concomitant increase in cycling stability, highlighting the success of this approach.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"730 ","pages":"Article 124187"},"PeriodicalIF":8.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948123","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":"Fractal analysis of porous structure and permeability of separation membranes","authors":"Riccardo Lovison ,&nbsp;Mohammad A. Afzal ,&nbsp;Christina M. Carbrello ,&nbsp;Andrew L. Zydney ,&nbsp;Yifu Ding","doi":"10.1016/j.memsci.2025.124168","DOIUrl":"10.1016/j.memsci.2025.124168","url":null,"abstract":"<div><div>Pore structures of membranes are routinely characterized by imaging techniques. However, it remains a challenge to quantify the images, and ultimately, to correlate the calculated geometric quantities with membrane performance. In this study, we present systematic fractal analysis of images of membrane pore structures. Both pore-area (<span><math><mrow><msub><mi>D</mi><mi>f</mi></msub></mrow></math></span>) and tortuosity fractal dimensions (<span><math><mrow><msub><mi>D</mi><mi>T</mi></msub></mrow></math></span>) were obtained from in-plane and in-thickness cross-sectional SEM images, respectively. Analysis of symmetric PVDF membranes reveal that the best method of extracting fractal dimension value is the box counting method (BCM) with box size range between minimum (<span><math><mrow><msub><mi>λ</mi><mi>min</mi></msub></mrow></math></span>) and maximum (<span><math><mrow><msub><mi>λ</mi><mi>max</mi></msub></mrow></math></span>) pore size. Importantly, the permeability of the membranes can be accurately calculated using geometric parameters (<span><math><mrow><msub><mi>λ</mi><mi>max</mi></msub></mrow></math></span>, porosity (<span><math><mrow><mi>ϕ</mi></mrow></math></span>), <span><math><mrow><msub><mi>D</mi><mi>f</mi></msub></mrow></math></span>, and <span><math><mrow><msub><mi>D</mi><mi>T</mi></msub></mrow></math></span>) that are all obtained from the images. We further applied the methodology to two asymmetric PES membranes by approximating the membranes as having separate layers each with different pore structures. The geometric parameters including fractal dimensions were determined for these layers, which allowed estimations of the permeability of these layers. Using resistance-in-series approach, the calculated overall membrane permeance matches well with the experimental results, with the first 2–3 <span><math><mi>μ</mi></math></span> m layer contributing over 66 % resistance for both membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"730 ","pages":"Article 124168"},"PeriodicalIF":8.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143932200","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":"The coaxial nanofiber microstructure facilitates continuous conduction and reinforce in proton exchange membranes with reduced Nafion content","authors":"Weiming Yu ,&nbsp;Ming Gao ,&nbsp;Xuemei Wu ,&nbsp;Ziyao Cui ,&nbsp;Tiantian Li ,&nbsp;Qining Wang ,&nbsp;Fujun Cui ,&nbsp;Gaohong He","doi":"10.1016/j.memsci.2025.124188","DOIUrl":"10.1016/j.memsci.2025.124188","url":null,"abstract":"<div><div>Proton exchange membranes with high proton conductivity, reducing swelling and cost are the research focusses in their application for fuel cells. In this study, the unique coaxial nanofiber microstructure divides shell and core functional layers for the conductive Nafion and reinforcing poly(vinylidene fluoride) (PVDF) components, respectively to optimize conduction-reinforce properties of the membrane. The PVDF fiber-forming core drags Nafion to form the shell layer, addressing the spinnable limitations of Nafion perfluorosulfonic acid polymer. Up to 100 wt% of Nafion microphase in the shell layer enhances continuity of proton conducting channels, and up to 100 wt% PVDF microphase in the core layer reinforces the membrane. PVDF core layer endows coaxial nanofiber membrane with extremely low swelling ratio of 1.5 % at 80 °C. The coaxial nanofiber microstructure ensures 100 % Nafion continuity in the shell layer, reducing overall Nafion content to 77.5 wt % but increasing proton conductivity to 241.9 mS cm⁻¹ and fuel cell peak power density of 1119.3 mW/cm² at 80 °C, 19.6 % and 27 % improvements, respectively over Nafion 211. The coaxial functional zoning design-offers an optimized microstructure for high-performance proton exchange membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"730 ","pages":"Article 124188"},"PeriodicalIF":8.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935434","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":"Pore engineering of ZIF-L fillers to boost the carbon capture performance of Pebax-based mixed matrix membranes","authors":"J.M. Xie ,&nbsp;W. Xu ,&nbsp;Y.W. Chen ,&nbsp;J. Guan ,&nbsp;J.T. Liu ,&nbsp;B.J. Ye ,&nbsp;H.J. Zhang","doi":"10.1016/j.memsci.2025.124123","DOIUrl":"10.1016/j.memsci.2025.124123","url":null,"abstract":"<div><div>The pore engineering of metal–organic frameworks (MOFs) fillers holds significant potential to enhance the gas separation performance of mixed matrix membranes (MMMs). In this work, we applied the topological phase transformation strategy to the pore engineering of fillers for MMMs. By ultrasonic heating ZIF-L in methanol, the phase transformation was realized in 2 h (much faster than previous works, the product denoted as ZL-2), the morphology of ZIF-L is basically preserved, but its porous structure is thoroughly regulated. This enables us to investigate the pure effect of filler porosity on the microstructure and separation performance of MMMs. As revealed by positron annihilation lifetime spectroscopy, pure Pebax membrane exhibits a unimodel porous structure, but ZL-2@Pebax membrane (ZL-2 fillers of 10 wt%) possesses a bimodal porous structure with a higher porosity. This leads to a remarkable improvement of CO₂/N₂ separation on both the permeability (45% increment for CO₂) and selectivity (11% increment) compared to pure Pebax membrane. These findings address the critical importance of pore engineering of MOF fillers for the gas separation performance of MMMs.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"730 ","pages":"Article 124123"},"PeriodicalIF":8.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928189","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":"A dense pyrophosphate proton-conducting membrane for hydrogen separation at intermediate temperatures","authors":"Lexian Dong ,&nbsp;Jiale Dong ,&nbsp;Sisi Wen ,&nbsp;Zihua Wang ,&nbsp;Jian Xue ,&nbsp;Haihui Wang","doi":"10.1016/j.memsci.2025.124152","DOIUrl":"10.1016/j.memsci.2025.124152","url":null,"abstract":"<div><div>The hydrogen permeation membranes that work at intermediate temperatures have received significant attention in recent years because they can efficiently couple hydrogen production and applications. Among them, the pyrophosphate-type membranes with high protonic conductivity at intermediate temperatures are ideal candidates. However, the low relative density of pyrophosphate materials is a huge challenge for practical applications, and few pyrophosphate-type membranes were reported for hydrogen separation. In this work, by adding ZnO sintering aid and doping the low-valence Mg²⁺ ions into the Sn-site of the SnP₂O₇, dense membranes are obtained for hydrogen permeation. The relative density and conductivity of the developed Sn_0.9Mg_0.1P₂O₇–ZnO (SM_0.1P–ZnO) membranes are up to 94.6 % and 0.08 mS cm⁻¹ (at 400 °C), respectively. The maximum hydrogen permeation flux of the SM_0.1P–ZnO membrane is 4.03 mol h⁻¹ m⁻² when humidified Ar is supplied on the sweeping side and 80 % H₂–20 % He is supplied on the feed side. In addition, the SM_0.1P–ZnO membrane exhibits good stability during 300 h of operation at 400 °C, which is promising for practical hydrogen separation at intermediate temperatures.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"729 ","pages":"Article 124152"},"PeriodicalIF":8.4,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906015","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":"Amino-functionalized KAUST-7 embedded polymers of intrinsic microporosity membrane with enhanced selectivity for CO2/CH4 separation","authors":"Ke Chen,&nbsp;Xin Guo,&nbsp;Linhan Ni,&nbsp;Junwen Qi,&nbsp;Jiansheng Li","doi":"10.1016/j.memsci.2025.124181","DOIUrl":"10.1016/j.memsci.2025.124181","url":null,"abstract":"<div><div>Rational design and construction of fillers and polymers are crucial for the development of high-performance mixed matrix membranes (MMMs). In this work, amino-functionalized metal-organic frameworks KAUST-7 (KAUST-7-NH₂) with square-shaped sheet morphology were utilized as fillers to fabricate MMMs by physical blending with the polymer of intrinsic microporosity (PIM-1). The square-shaped KAUST-7-NH₂ sheets, prepared via in situ replacement of 2-aminopyrazine into the KAUST-7 framework, exhibited superior separation performance compared to the mono-ligand KAUST-7. Benefiting from the strong CO₂ affinity, high porosity and optimal pore sizes of KAUST-7-NH₂, the outstanding CO₂/CH₄ separation performance of the composite membrane was observed. The integration of square-shaped KAUST-7-NH₂ sheets provides a 2.5-fold improvement in CO₂/CH₄ selectivity together with acceptable gas permeability as compared to the original PIM-1 membrane. Furthermore, a 100-h continuous permeation test validated the stability of the fabricated MMMs. Remarkably, the resulting MMM retained 92 % of their initial CO₂ permeability after 150 days (drop of only 249 Barrer), indicating that the reduction in CO₂ permeability was approximately 10-fold lower than that of the pristine PIM-1 membrane. The prepared MMMs exhibit enhanced CO₂/CH₄ selectivity and long-term stability, making it a highly promising candidate for practical application.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"729 ","pages":"Article 124181"},"PeriodicalIF":8.4,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912453","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":"Synthesis of tungsten-doped MFI zeolite membranes with improved performance for CO2/N2 separation","authors":"Li Peng,&nbsp;Li Zhao,&nbsp;Guang Pan,&nbsp;Xuehong Gu","doi":"10.1016/j.memsci.2025.124185","DOIUrl":"10.1016/j.memsci.2025.124185","url":null,"abstract":"<div><div>The separation of CO₂ from N₂ using MFI-type zeolite membranes relies on a mechanism dominated by adsorption and diffusion processes. In this investigation, we employed a tungsten (W) doping approach to elevate the CO₂ separation selectivity of MFI zeolite membranes. Isothermal adsorption assessments demonstrated an elevated heat of adsorption (Q_st) for CO₂ and a reduced pore sizes after W doping, corroborating the enhanced CO₂/N₂ separation efficiency observed. Specifically, the W-doped MFI membrane exhibited a selectivity of 38.8 under dry conditions, a substantial improvement over the 8.7 selectivity achieved by the undoped <em>Si</em>-MFI membrane, while the CO₂ permeance remained comparable (3.9 × 10⁻⁷ vs 4.5 × 10⁻⁷ mol m⁻² s⁻¹·Pa⁻¹). Furthermore, the incorporation of tungsten curtails the formation of silanol groups by stabilizing the zeolite framework via energetically favorable W–<em>O</em>–Si linkages. These linkages diminish silanol-related defects, typically prone to water adsorption, thereby enhancing the membrane's hydrophobicity. Consequently, the W-doped MFI membrane maintains a CO₂/N₂ selectivity of 29.5 and a CO₂ permeance of 1.8 × 10⁻⁷ mol m⁻² s⁻¹·Pa⁻¹ in the humid environments, outperforming most reported zeolite membranes and showing potential ability for practical post-combustion carbon capture applications.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"729 ","pages":"Article 124185"},"PeriodicalIF":8.4,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912452","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":"Controlling the physiochemical properties of graphene oxide coatings for improved membrane distillation","authors":"Xiaoqing Chang ,&nbsp;Kecheng Guan ,&nbsp;Liheng Dai ,&nbsp;Zhan Li ,&nbsp;Pengfei Zhang ,&nbsp;Shuzhen Zhao ,&nbsp;Keizo Nakagawa ,&nbsp;Gongping Liu ,&nbsp;Tomohisa Yoshioka ,&nbsp;Wanqin Jin ,&nbsp;Hideto Matsuyama","doi":"10.1016/j.memsci.2025.124173","DOIUrl":"10.1016/j.memsci.2025.124173","url":null,"abstract":"<div><div>Membrane distillation (MD) is a promising solution for global water scarcity, particularly for high-salinity wastewater treatment. However, MD membranes face critical challenges such as wetting and fouling in practical applications, particularly for saline wastewater containing organic pollutants. Membrane surface properties are crucial to prevent their tendency to wet and foul, and strategies involving membrane coatings have been developed. However, conventional approaches often struggle because of conflicting requirements for hydrophobic and hydrophilic coatings to prevent wetting and fouling, respectively, making it difficult to achieve optimal performance. Exploring favorable membrane coating properties and their correlation with membrane performance is essential for enhancing MD effectiveness but remains underexplored because of the complexity of commonly used composite coating materials. In this study, we applied graphene oxide (GO) nanosheets as bare coating materials to examine the relationship between coating properties and MD performance. GO materials allow feasible control over coating structure and chemistry, enabling coating and performance adjustments. It was demonstrated that a continuous dense coating with moderate hydrophilicity can enhance the antiwetting and antifouling capabilities of a hydrophobic MD membrane without compromising permeance. Continuity and pore size are pivotal for the application of effective hydrophilic coatings in MD. This study provides insight into the design of coatings for MD membranes to enhance the effectiveness of sustainable processes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"730 ","pages":"Article 124173"},"PeriodicalIF":8.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924229","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":"High-quality silicalite-1/PVA mixed matrix membrane for efficient pervaporation separation of xylene isomers","authors":"Wei Chen ,&nbsp;Pengfei Wang ,&nbsp;Weike Jia ,&nbsp;Huidan Zeng","doi":"10.1016/j.memsci.2025.124171","DOIUrl":"10.1016/j.memsci.2025.124171","url":null,"abstract":"<div><div>Membrane-based pervaporation process is the most time- and energy-saving method for the separation of xylene isomers. However, developing easily prepared membrane with a high separation factor still remains a significant challenge. Herein, the silicalite-1/polyvinyl alcohol (PVA) mixed matrix membrane (MMM) (SPMMM) with enhanced xylene isomers pervaporation separation performance was successfully fabricated via solution scraping method. The compactness and compatibility of the SPMMM were effectively tuned by optimizing the zeolite content and selecting appropriate cross-linker. Results showed that the SPMMM with 40 % zeolite content, cross-linked with fumaric acid (SPMMM-Fu), exhibited the densest and most continuous membrane structure, the lowest swelling degree and the best xylene compatibility. Pervaporation experiments demonstrated that the SPMMM-Fu exhibited superior xylene isomers selective separation performance compared to the templated-silicalite-1/α-Al₂O₃ membrane. For the SPMMM-Fu, the maximum separation factor was achieved in binary xylene isomer solutions containing 10 % p-X. The total permeate fluxes in the aforementioned binary p-X/o-X and p-X/m-X isomer solutions were about 43.20 g m⁻² h⁻¹ and 34.66 g m⁻² h⁻¹, respectively. The corresponding separation factors of p-X/o-X and p-X/m-X were about 34.65 and 39.73, respectively. The third-stage separation experiment demonstrated that the SPMMM-Fu could produce p-X with a purity ≥99.7 % from binary p-X/o-X isomer solutions. Long-term and variable-temperature pervaporation experiments suggested the SPMMM-Fu had excellent structural stability. Furthermore, reproducibility tests conducted on multiple batches of the SPMMM indicated that the SPMMM-Fu could be produced stably. The scalable experiment demonstrated that our strategy could produce large-area SPMMM-Fu (25 × 40 cm²), exhibiting separation performance similar to that of small membrane coupons. This work presented a potentially low-cost and scalable approach for producing highly dense SPMMM with exceptional xylene compatibility, enabling efficient pervaporation separation of xylene isomers from their mixtures.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"729 ","pages":"Article 124171"},"PeriodicalIF":8.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902319","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}