Journal of Membrane Science最新文献

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A novel sulfonated polyimide membranes inserting flexible decane chain and rigid triptycene-based crosslinked network for vanadium redox flow batteries 钒氧化还原液流电池用新型磺化聚酰亚胺膜,插入柔性癸烷链和刚性三叶烯交联网络
IF 8.4 1区 工程技术
Journal of Membrane Science Pub Date : 2025-07-16 DOI: 10.1016/j.memsci.2025.124454
Yangtian Jing , Gang Wang , Shiguo Wei , Bing Wang , Qi Zhang , Wenjun Zhu , Shuwen Zhang , Jijun Chen , Yufeng Zhou , Jie Zhang , Jinwei Chen , Ruilin Wang
{"title":"A novel sulfonated polyimide membranes inserting flexible decane chain and rigid triptycene-based crosslinked network for vanadium redox flow batteries","authors":"Yangtian Jing ,&nbsp;Gang Wang ,&nbsp;Shiguo Wei ,&nbsp;Bing Wang ,&nbsp;Qi Zhang ,&nbsp;Wenjun Zhu ,&nbsp;Shuwen Zhang ,&nbsp;Jijun Chen ,&nbsp;Yufeng Zhou ,&nbsp;Jie Zhang ,&nbsp;Jinwei Chen ,&nbsp;Ruilin Wang","doi":"10.1016/j.memsci.2025.124454","DOIUrl":"10.1016/j.memsci.2025.124454","url":null,"abstract":"<div><div>To address the trade-off between proton conductivity and vanadium ion permeability in sulfonated polyimide (SPI) membranes, we introduce a novel flexible decane chain and rigid triptycene-based crosslinked SPI (SPI-DH) with rigid twisted groups and amine-functionalized networks. Incorporating flexible decane chains not only enhances the membrane-forming ability but also remarkably reduces the likelihood of nucleophilic attacks by water on the imide bonds, thereby strengthening the membrane's hydrolytic stability. The rigid structure increases chain spacing and hydrophilic-hydrophobic phase separation, while amine groups conduct protons by forming hydrogen bonds with sulfonate groups and construct crosslinked networks to suppress vanadium ion permeation. SPI-DH-60 exhibits a high proton conductivity of 0.101 S cm<sup>−1</sup> and an ion selectivity of 7.32 × 10<sup>4</sup> S min cm<sup>−3</sup>, achieving a high energy efficiency of 80.39 % at 160 mA cm<sup>−2</sup> and over 400 cycles. These results demonstrate its potential for vanadium redox flow batteries (VRFBs).</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"734 ","pages":"Article 124454"},"PeriodicalIF":8.4,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663614","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}
引用次数: 0
Combination of membrane bioreactor and membrane distillation process for effective treatment of shale gas produced water 膜生物反应器与膜蒸馏相结合有效处理页岩气采出水
IF 8.4 1区 工程技术
Journal of Membrane Science Pub Date : 2025-07-15 DOI: 10.1016/j.memsci.2025.124450
Yuchuan Meng , Jie Liu , Rui Li , Haiqing Chang
{"title":"Combination of membrane bioreactor and membrane distillation process for effective treatment of shale gas produced water","authors":"Yuchuan Meng ,&nbsp;Jie Liu ,&nbsp;Rui Li ,&nbsp;Haiqing Chang","doi":"10.1016/j.memsci.2025.124450","DOIUrl":"10.1016/j.memsci.2025.124450","url":null,"abstract":"<div><div>Shale gas production generates large volumes of shale gas produced water (SGPW), which poses significant environmental and health risks. Membrane distillation (MD) is a promising treatment method for SGPW, but its application is limited by challenges such as membrane fouling and wetting. To address these challenges, integrating membrane bioreactor (MBR) with MD offers a potential solution. This study investigates the impact of different fillers, including powdered activated carbon (PAC), activated alumina (AA) and powdered zeolite (PZ), on the performance of the MBR-MD system for treating SGPW. Results showed that the MBR systems improved the permeate quality and significantly enhanced the MD efficacy. Notably, PAC-MBR, AA-MBR and PZ-MBR removed 97.08 %, 97.51 % and 97.90 % of ammonia, respectively, compared to 94.76 % in Control group. Moreover, Control-MBR and AA-MBR formed rough and loose fouling layers, whereas PAC-MBR and PZ-MBR formed looser fouling layers, greatly reducing the transmembrane pressure. <em>Proteobacteria</em> and <em>Bacteroidota</em> were key factors in membrane fouling, and <em>Chloroflexi</em> was critical for the carbon cycle in PAC-MBR. The MBR pretreatment enhanced MD performance, decreasing conductivity (4.36–24.26 μS/cm), improving normalized flux (37 %–47 %) and water contact angle (78 %). These findings provide valuable insights into optimizing SGPW treatment systems and potentially guiding future advancements in membrane-based treatment technologies.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"734 ","pages":"Article 124450"},"PeriodicalIF":8.4,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654489","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}
引用次数: 0
Effects of hydrogen blocking and trapping by point defects on hydrogen diffusivity in B2-type PdCu alloys: Modeling and experimental analysis 点缺陷阻氢和捕氢对b2型PdCu合金氢扩散率的影响:模型与实验分析
IF 8.4 1区 工程技术
Journal of Membrane Science Pub Date : 2025-07-15 DOI: 10.1016/j.memsci.2025.124401
Akihiro Mitsuhara , Kei Saito , Hiroshi Yukawa , Kenichi Takai , Hajime Kimizuka
{"title":"Effects of hydrogen blocking and trapping by point defects on hydrogen diffusivity in B2-type PdCu alloys: Modeling and experimental analysis","authors":"Akihiro Mitsuhara ,&nbsp;Kei Saito ,&nbsp;Hiroshi Yukawa ,&nbsp;Kenichi Takai ,&nbsp;Hajime Kimizuka","doi":"10.1016/j.memsci.2025.124401","DOIUrl":"10.1016/j.memsci.2025.124401","url":null,"abstract":"<div><div>Thorough assessment of hydrogen and lattice defect interactions in hydrogen-permeable alloys is essential because of their significant influence on hydrogen diffusion, the dominant elementary process in hydrogen permeation. However, the underlying mechanisms are not adequately understood. In this study, theoretical and experimental analyses revealed the controlling factors leading to a significant reduction in the hydrogen diffusivity of B2-structured PdCu alloys, which are promising materials for low-temperature hydrogen purification in practical applications. Using a density functional theory (DFT)-informed kinetic Monte Carlo (KMC) approach, we quantitatively evaluated point defect (i.e., antisite Cu atoms and Cu vacancies) effects on the hydrogen diffusivity (<span><math><mi>D</mi></math></span>) of PdCu alloys. It was found that antisite Cu atoms decreased <span><math><mi>D</mi></math></span> in proportion to their number because of the blocking effect, whereas Cu vacancies strongly decreased <span><math><mi>D</mi></math></span> at temperatures below 500 K due to the trapping effect. Moreover, the <span><math><mi>D</mi></math></span> values predicted by KMC simulations considering Cu vacancy effects were in good agreement with their experimental counterparts. Thermal desorption spectroscopy measurements were performed to detect the presence of lattice defects that trapped hydrogen in the PdCu alloys. The results indicate that lattice defects with a hydrogen binding energy of 0.40 eV exist in the sample, and this value is comparable to the DFT result for the Cu vacancy. This suggests that point defects, analogous to Cu vacancies, were responsible for the significant reduction in <span><math><mi>D</mi></math></span> for PdCu alloys observed in experiments. This study contributes to a detailed understanding of the interplay between hydrogen and lattice defects in Pd-based alloys.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"734 ","pages":"Article 124401"},"PeriodicalIF":8.4,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679253","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}
引用次数: 0
Dynamic computation of multicomponent water and nutrients transport in forward osmosis system 正向渗透系统中多组分水分和养分运移的动态计算
IF 8.4 1区 工程技术
Journal of Membrane Science Pub Date : 2025-07-14 DOI: 10.1016/j.memsci.2025.124444
Aaron Zhen Yao Koe , Wei Jiun Lim , Chian Yong Loh , Boon Seng Ooi
{"title":"Dynamic computation of multicomponent water and nutrients transport in forward osmosis system","authors":"Aaron Zhen Yao Koe ,&nbsp;Wei Jiun Lim ,&nbsp;Chian Yong Loh ,&nbsp;Boon Seng Ooi","doi":"10.1016/j.memsci.2025.124444","DOIUrl":"10.1016/j.memsci.2025.124444","url":null,"abstract":"<div><div>As aquaculture production garners more interest around the globe, the production of aquaculture effluent will continue to rise. With the presence of dilute nutrients (NH<sub>4</sub><sup>+</sup> and H<sub>2</sub>PO<sub>4</sub><sup>−</sup>) in the effluent, the recovery of said nutrients requires a dewatering process. Forward osmosis (FO) systems are good dewatering processes as they have low fouling tendencies and better reuse efficiency. With that, a method for performance simulation is required for multicomponent FO systems. Multicomponent Fickian solution-diffusion model provides a simple computation method for FO systems containing more than three ions. Preliminary experimental studies concluded that NH<sub>4</sub><sup>+</sup> transport across FO membrane relies on self-diffusion and induced diffusion caused by draw solute (Mg<sup>2+</sup>). For H<sub>2</sub>PO<sub>4</sub><sup>−</sup> ions, the transport was mainly contributed by convection as the diffusion of H<sub>2</sub>PO<sub>4</sub><sup>−</sup> across FO membrane showed positive relation with increasing water flux. Experimental validation of estimated parameters was also performed by two separate experiments. FO system performance such as water flux, reverse salt flux, nutrient rejection, and final nutrient concentration was computed and compared with experimental data. The comparison showed that the values computed were generally within 6 % of deviation with some outliers at 9 % of deviation. Dynamic computation showed the flexibility of estimated parameters as it can also predict FO system performance that operates at longer operation period and a at a higher initial volume of feed and draw solution.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"734 ","pages":"Article 124444"},"PeriodicalIF":8.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634427","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}
引用次数: 0
2D conductive bimetallic metal-organic framework membranes for ultrafast degradation of organic pollutants 用于超快降解有机污染物的二维导电双金属金属-有机框架膜
IF 8.4 1区 工程技术
Journal of Membrane Science Pub Date : 2025-07-14 DOI: 10.1016/j.memsci.2025.124447
Jian Hu, Jue Hou, Chen Zhao, Yuyu Su, Huacheng Zhang
{"title":"2D conductive bimetallic metal-organic framework membranes for ultrafast degradation of organic pollutants","authors":"Jian Hu,&nbsp;Jue Hou,&nbsp;Chen Zhao,&nbsp;Yuyu Su,&nbsp;Huacheng Zhang","doi":"10.1016/j.memsci.2025.124447","DOIUrl":"10.1016/j.memsci.2025.124447","url":null,"abstract":"<div><div>Peroxymonosulfate (PMS)-based advanced oxidation processes are commonly recognized as an effective strategy for eliminating refractory organic pollutants from water. While significant efforts have been made to develop PMS activation efficiency, the low conductivity of PMS activators and the short lifespan of the reactive species still limit their catalytic performance. In this study, we synthesize a series of bimetallic conductive metal-organic framework (cMOFs) membranes, ZnCo-Tetrakis(4-carboxyphenyl)porphyrin (ZnCo-TCPP), by precisely tuning the morphology and conductivity of two-dimensional frameworks through controlled Zn and Co ion ratios. The resulting membrane obtained 100 % removal efficiency of bisphenol A and five other pollutants, demonstrating a high-water flux of 308 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup> and an exceptionally fast reaction rate constant of 2000 min<sup>-1</sup>. Quenching tests and chemical probe analysis confirmed that hydroxyl radicals (·OH) and sulfate radicals (SO<sub>4</sub><sup>•-</sup>) played dominant roles in the ZnCo-TCPP/PMS system. This study presents a novel strategy for morphology engineering in cMOFs and advances their application in high-performance PMS-based water purification.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"734 ","pages":"Article 124447"},"PeriodicalIF":8.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654492","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}
引用次数: 0
Polarity-dependent ultrafast water transport through alumina membranes 极性依赖的超快水通过氧化铝膜的传输
IF 8.4 1区 工程技术
Journal of Membrane Science Pub Date : 2025-07-14 DOI: 10.1016/j.memsci.2025.124446
Minghao Lai , Zhenyu Lu , Dan Pan , Minghui Qiu , Xiaoning Yang , Zhijun Xu
{"title":"Polarity-dependent ultrafast water transport through alumina membranes","authors":"Minghao Lai ,&nbsp;Zhenyu Lu ,&nbsp;Dan Pan ,&nbsp;Minghui Qiu ,&nbsp;Xiaoning Yang ,&nbsp;Zhijun Xu","doi":"10.1016/j.memsci.2025.124446","DOIUrl":"10.1016/j.memsci.2025.124446","url":null,"abstract":"<div><div>Fast water transport channels are of great importance for water-related membrane separation processes with many efforts devoted to surface design and modification. However, there exists a contradiction about the effect of the pore hydrophilicity on water transport, particularly at the nanometer scale. Herein, we employ nonequilibrium molecular dynamics simulation to study water transport through ceramic membranes with varying hydrophilicities by regulating the surface polarity. Our study clearly illustrates that precise modification of the surface polarity can modulate the hydrogen bond (HB) networks to greatly enhance water transport in the confined environment. By investigating a series of membrane models covering a large range of surface hydrophilicities, the pores with intermediate polarities exhibit ultrafast water flux up to 6 times higher than both hydrophilic and hydrophobic membranes. In these pores, the formation of stable HB layers among water molecules significantly promotes the rapid water transport, together with the unstable HBs between the solvent and the substrate, which further provides the smallest hindrances for permeability. For polar and nonpolar pores, the formed HB networks within the channel exhibit a completely opposite trend, leading to the lowest water flux among all the surface polarities investigated. This study provides important insight into the contradiction about the role of the HB networks in the water permeability and successfully proposes a promising strategy to realize ultrafast porous membranes via regulating the pore hydrophilicity.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"734 ","pages":"Article 124446"},"PeriodicalIF":8.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654495","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}
引用次数: 0
Sm-doped ceria asymmetric membrane reactors for hydrogen production through water splitting 水裂解制氢的sm掺杂铈不对称膜反应器
IF 8.4 1区 工程技术
Journal of Membrane Science Pub Date : 2025-07-14 DOI: 10.1016/j.memsci.2025.124448
Lili Cai , Kaiyue Zhu , Zhongwei Cao , Hongbo Li , Xuefeng Zhu , Weishen Yang
{"title":"Sm-doped ceria asymmetric membrane reactors for hydrogen production through water splitting","authors":"Lili Cai ,&nbsp;Kaiyue Zhu ,&nbsp;Zhongwei Cao ,&nbsp;Hongbo Li ,&nbsp;Xuefeng Zhu ,&nbsp;Weishen Yang","doi":"10.1016/j.memsci.2025.124448","DOIUrl":"10.1016/j.memsci.2025.124448","url":null,"abstract":"<div><div>Single ceria-based oxides with high ionic conductivity are rarely employed as oxygen transport membrane reactors (OTMRs) because of their low electronic conductivity in oxidizing atmospheres. However, when both sides of OTMRs are exposed to reducing conditions, the reduction of Ce<sup>4+</sup> to Ce<sup>3+</sup> can remarkably boost electronic conductivity, enabling ceria-based oxides to function as mixed conductors. In this study, an asymmetric Sm-doped ceria (SDC) membrane was fabricated to assess its feasibility for hydrogen production in OTMRs via water splitting. <em>In situ</em> high-temperature X-ray diffraction analysis demonstrated that SDC maintained its cubic phase structure from room temperature to 900 °C in both oxidizing and reducing atmospheres. Electric conductivity relaxation (ECR) experiments indicated that higher temperatures and lower oxygen partial pressures enhanced the transport of oxygen ions and electrons. Moreover, the conductivity of SDC bars with Ni/SDC catalyst coating reached equilibrium faster than pure SDC bars, implying that the catalyst coating sped up the reduction kinetics. Notably, although the oxygen permeation flux of the SDC asymmetric membrane was limited under air separation conditions, it exhibited an excellent hydrogen production rate, and the oxygen permeation flux for hydrogen production via water splitting was approximately 150 times higher than the value observed under air separation, primarily due to the enhanced electronic conductivity under reducing atmospheres and the accelerated ionic-electronic kinetics facilitated by the catalyst coating. Both the SDC membrane and the Ni/SDC catalyst maintained good structural stability under hydrogen production conditions, underscoring the significant potential of ceria membranes for hydrogen production through water splitting.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"734 ","pages":"Article 124448"},"PeriodicalIF":8.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654491","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}
引用次数: 0
High-flux thin-film nanocomposite membrane enabled by ZIF-8–sulfobetaine–dopamine nanoparticles for pervaporation zif -8 -磺基甜菜碱-多巴胺纳米颗粒使高通量薄膜纳米复合膜渗透蒸发
IF 8.4 1区 工程技术
Journal of Membrane Science Pub Date : 2025-07-14 DOI: 10.1016/j.memsci.2025.124443
Marwin R. Gallardo , Ching-Hsuan Huang , Hao Huang , Chi-Lan Li , Hui-An Tsai , Shu-Hsien Huang , Kueir-Rarn Lee
{"title":"High-flux thin-film nanocomposite membrane enabled by ZIF-8–sulfobetaine–dopamine nanoparticles for pervaporation","authors":"Marwin R. Gallardo ,&nbsp;Ching-Hsuan Huang ,&nbsp;Hao Huang ,&nbsp;Chi-Lan Li ,&nbsp;Hui-An Tsai ,&nbsp;Shu-Hsien Huang ,&nbsp;Kueir-Rarn Lee","doi":"10.1016/j.memsci.2025.124443","DOIUrl":"10.1016/j.memsci.2025.124443","url":null,"abstract":"<div><div>This study presents the fabrication and performance of a novel thin-film nanocomposite (TFN) membrane enhanced with ZIF-8-sulfobetaine-dopamine (ZSBD) nanoparticles for pervaporation separation of isopropanol–water mixtures. ZSBD was synthesized by in-situ growth of ZIF-8 around zwitterionic sulfobetaine dopamine nanoparticles to improve both hydrophilicity and selective water transport. The TFN-ZSBD membrane demonstrated enhanced surface roughness, hydrophilicity, and structural stability, confirmed by SEM, AFM, ATR-FTIR, and XPS analyses. At 25 °C with 70 wt% isopropanol feed, the optimized membrane (150 ppm ZSBD) achieved a flux of 3.31 ± 0.13 kg m<sup>−2</sup> h<sup>−1</sup> and water concentration of 98.37 ± 0.37 wt%, with a PSI over 523,000. The membrane maintained high performance across a range of feed concentrations and alcohol types and showed excellent thermal responsiveness and 168-h stability. These results highlight the synergy of ZIF-8 and zwitterionic chemistry in enhancing pervaporation performance for industrial applications.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"734 ","pages":"Article 124443"},"PeriodicalIF":8.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654494","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}
引用次数: 0
Ultrahigh molecular weight PEI-GO membranes overcome the separation performance-swelling trade-off for high-performance MeOH/DMC separation 超高分子量PEI-GO膜克服了MeOH/DMC高效分离的分离性能膨胀权衡
IF 9 1区 工程技术
Journal of Membrane Science Pub Date : 2025-07-12 DOI: 10.1016/j.memsci.2025.124400
Xiaoyan Leng , Wei Qin , Ning Guo , Xinliang Liu , Ming Wang , Yingfei Hou
{"title":"Ultrahigh molecular weight PEI-GO membranes overcome the separation performance-swelling trade-off for high-performance MeOH/DMC separation","authors":"Xiaoyan Leng ,&nbsp;Wei Qin ,&nbsp;Ning Guo ,&nbsp;Xinliang Liu ,&nbsp;Ming Wang ,&nbsp;Yingfei Hou","doi":"10.1016/j.memsci.2025.124400","DOIUrl":"10.1016/j.memsci.2025.124400","url":null,"abstract":"<div><div>Dimethyl carbonate (DMC) is an eco-friendly organic compound, but its production process generates a methanol (MeOH)/DMC azeotrope, resulting in high energy consumption for separation. With its low energy consumption and environmental benefits, pervaporation membrane separation technology presents a promising solution for separating azeotropic organic mixtures. In this study, polyethyleneimine (PEI) is employed as the membrane material for the separation of MeOH/DMC, owing to its strong affinity for MeOH. However, the poor organic solvent swelling resistance is a significant challenge for the PEI matrix. Therefore, ultrahigh molecular weight PEI (Mn = 750,000) is utilized, and graphene oxide (GO) is incorporated to improve the organic solvent resistance of the PEI-based membrane. The results indicate that the optimized membrane demonstrates a total flux of 0.67 kg m<sup>−2</sup> h<sup>−1</sup> and a separation factor of 89 for a 10 wt% MeOH/DMC mixture at 60 °C. Notably, enhancing the molecular weight of PEI and introducing GO contribute to a significant improvement in the membrane's resistance to solvent swelling, breaking the trade-off between separation performance and swelling resistance. This work demonstrates the strong potential of PEI membrane materials for effective application in the separation of MeOH/DMC.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"734 ","pages":"Article 124400"},"PeriodicalIF":9.0,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723080","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}
引用次数: 0
Triazine-Tröger's Base framework membranes enabling ultra-fast H+ selectivity for acid recovery processes Triazine-Tröger的碱性框架膜,使超快的H+选择性酸回收过程
IF 8.4 1区 工程技术
Journal of Membrane Science Pub Date : 2025-07-11 DOI: 10.1016/j.memsci.2025.124435
Jiu Yang , Wentao Jin , Jingjing Gu, Ruonan Tan, Ziqiang Hong, Suixin Zhang, Zheng Ji, Xingyun Li, Zongliang Wan, Rui Jia, Cen-Feng Fu, Jin Ran
{"title":"Triazine-Tröger's Base framework membranes enabling ultra-fast H+ selectivity for acid recovery processes","authors":"Jiu Yang ,&nbsp;Wentao Jin ,&nbsp;Jingjing Gu,&nbsp;Ruonan Tan,&nbsp;Ziqiang Hong,&nbsp;Suixin Zhang,&nbsp;Zheng Ji,&nbsp;Xingyun Li,&nbsp;Zongliang Wan,&nbsp;Rui Jia,&nbsp;Cen-Feng Fu,&nbsp;Jin Ran","doi":"10.1016/j.memsci.2025.124435","DOIUrl":"10.1016/j.memsci.2025.124435","url":null,"abstract":"<div><div>Designing Ion-selective membranes (ISMs) with ultrafast H<sup>+</sup> selectivity is highly challenging for efficiently recovering high-purity acids under harsh conditions. This challenge arises primarily because the channels of existing ISMs suitable for acid recovery tend to swell under high charged densities, resulting in reduced selectivity, despite high charge density being critical for achieving high acid flux. To address this, we developed a robust acid-recovery membrane based on a fully rigid skeletal framework of charged Tröger's Base (TB) polymer bearing triazine moieties. This TB polymer framework provides abundant rigid micropores, enabling efficient H<sup>+</sup> recovery from mixed metal ion systems through confinement-dimensional sieving effects. Incorporation of triazine rings further regulates the chemical environment of the rigid channels, facilitating ultrafast proton transport. The resulting TB framework membrane exhibits exceptional acid-recovery performance, achieving an H<sup>+</sup> dialysis coefficient of 22.80 × 10<sup>−3</sup> m h<sup>−1</sup> and a selectivity of 7238, surpassing the commercial membrane DF-120 by 2.7-fold and 391.2-fold, respectively. The membrane also demonstrates outstanding durability under high-concentration acid (10 mol L<sup>−1</sup>) and high-temperature (70 °C) conditions, making it highly suitable for practical applications. The membrane design strategy presented here may be further extended to develop advanced membrane materials for applications in electrochemical devices requiring precise ion selectivity.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"734 ","pages":"Article 124435"},"PeriodicalIF":8.4,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632411","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}
引用次数: 0
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