Journal of Membrane Science最新文献_第4页

Enhancing operational stability and pollutants removal in dynamic membrane bioreactors via granular activated carbon for landfill leachate treatment 颗粒活性炭处理垃圾渗滤液提高动态膜生物反应器的运行稳定性和污染物去除率

IF 9 1区工程技术

Journal of Membrane Science Pub Date : 2025-09-20 DOI: 10.1016/j.memsci.2025.124726

Xiao Xiao , Yuanmeng Tang , Jie Han , Yibin Bao , Xiaomei Su , Feng Dong , Liang Xu , Chongjun Chen , Hailu Fu , Faqian Sun

{"title":"Enhancing operational stability and pollutants removal in dynamic membrane bioreactors via granular activated carbon for landfill leachate treatment","authors":"Xiao Xiao , Yuanmeng Tang , Jie Han , Yibin Bao , Xiaomei Su , Feng Dong , Liang Xu , Chongjun Chen , Hailu Fu , Faqian Sun","doi":"10.1016/j.memsci.2025.124726","DOIUrl":"10.1016/j.memsci.2025.124726","url":null,"abstract":"<div><div>Polymeric membrane-based technology has been widely engineered to facilitate efficient treatment of landfill leachate. However, low membrane filtration flux and severe membrane fouling greatly hampered its low-cost application. In this study, a dynamic membrane bioreactor (DMBR) integrated with granular activated carbon (GAC) was proposed to enhance both filtration performance and pollutants removal from high-strength landfill leachate. Under influent COD and NH<sub>4</sub><sup>+</sup>-N were 3522 ± 264 and 983 ± 36 mg/L, GAC-DMBR achieved effluent COD and total nitrogen of 367 ± 45 and 114 ± 20 mg/L, respectively. A dynamic membrane (DM) layer was rapidly formed within 0.5 h and sustained stable operation for a cycle of about 33 days at a constant flux of 10 LMH. GAC addition facilitated the formation of a thicker but more permeable DM layer through enhanced sludge aggregation and significant reduction in extracellular polymeric substances (EPS). Microbial analysis revealed GAC-induced enrichment of nitrifiers (e.g., <em>Nitrosomonas</em>, <em>Nitrobacter</em>) and organic degraders (e.g., <em>Candidatus Promineifilum</em>), alongside reduced abundance of EPS-producing genera (e.g., <em>Anaerolinea</em>) and denitrifiers (e.g., <em>Thauera</em>, <em>Ottowia</em>). These community shifts aligned with the higher abundances of genes involved in nitrification, anammox, along with the lower abundances of denitrification and EPS biosynthesis. All these changes promoted a transition toward autotrophic nitrogen removal (ANR) and effectively mitigated membrane fouling. This study offers a promising approach for improving the efficiency and operational sustainability of landfill leachate treatment systems using GAC-mediated DMBR technology.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"736 ","pages":"Article 124726"},"PeriodicalIF":9.0,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118311","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

In-situ ScOOH coaxially armored polyimide nanofibrous separator with high electrolyte wettability and thermostability for high-safety and high-rate capability lithium-ion batteries 原位ScOOH同轴铠装聚酰亚胺纳米纤维分离器，具有高电解质润湿性和热稳定性，适用于高安全性和高倍率容量锂离子电池

IF 9 1区工程技术

Journal of Membrane Science Pub Date : 2025-09-20 DOI: 10.1016/j.memsci.2025.124722

Kefan Liu , Daolei Lin , Nanxi Dong , Bingxue Liu , Guofeng Tian , Shengli Qi , Dezhen Wu

{"title":"In-situ ScOOH coaxially armored polyimide nanofibrous separator with high electrolyte wettability and thermostability for high-safety and high-rate capability lithium-ion batteries","authors":"Kefan Liu , Daolei Lin , Nanxi Dong , Bingxue Liu , Guofeng Tian , Shengli Qi , Dezhen Wu","doi":"10.1016/j.memsci.2025.124722","DOIUrl":"10.1016/j.memsci.2025.124722","url":null,"abstract":"<div><div>With the growing demand for electric vehicles and grid-scale energy storage, conventional polyolefin separators fall short in meeting the thermal and electrochemical requirements of next-generation lithium-ion batteries (LIBs). Herein, a polyimide-based composite separator (PI@ScOOH) was developed via alkali-etching, adsorption–complexation, and hydrolysis to in situ coat scandium oxyhydroxide (ScOOH) onto a PI nanofiber matrix. The ScOOH coating introduced physical crosslinking among fibers, significantly enhancing mechanical integrity. Compared to polyolefin separators, PI@ScOOH exhibited superior electrolyte wettability (contact angle: 9.05° vs 48.53°) and thermal dimensional stability (TMA onset: 350 °C vs 140 °C). Flame retardancy tests confirmed its excellent safety characteristics. Electrochemical evaluation using NCM811/Li full cells showed that the PI@ScOOH separator achieved higher capacity retention (96.7 % vs 90.9 % after 300 cycles at 1C) and enhanced rate capability (142.8 mAh·g<sup>−1</sup> vs 106.9 mAh·g<sup>−1</sup> at 10C) relative to polyolefin counterparts. Notably, the separator maintained operational stability at 120 °C for 90 min, far exceeding the 10-min limit of conventional separators. These results indicate that PI@ScOOH is a new type of lithium-ion battery separator with enhanced safety and electrochemical properties.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"736 ","pages":"Article 124722"},"PeriodicalIF":9.0,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145109161","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 performance of multilayer thin-film composite membranes with hyperbranched polyether-based copolyimide separation layers for CO2 separation 超支化聚醚基共聚亚胺分离层用于CO2分离的高性能多层薄膜复合膜

IF 9 1区工程技术

Journal of Membrane Science Pub Date : 2025-09-20 DOI: 10.1016/j.memsci.2025.124730

Xiaoli Ding , Xianyun Cheng , Hongyong Zhao , Qingping Xin , Yuzhong Zhang

{"title":"High performance of multilayer thin-film composite membranes with hyperbranched polyether-based copolyimide separation layers for CO2 separation","authors":"Xiaoli Ding , Xianyun Cheng , Hongyong Zhao , Qingping Xin , Yuzhong Zhang","doi":"10.1016/j.memsci.2025.124730","DOIUrl":"10.1016/j.memsci.2025.124730","url":null,"abstract":"<div><div>Multilayer thin-film composite membranes with hyperbranched polyether-based polyimide separation layer for CO<sub>2</sub> separation were synthesized by interfacial polymerization. The hyperbranched polyimide layer was synthesized via triamine-based polyetheramine (Jeffamine® T403) as the core. The effects of the polymerization time, and the monomer concentration on the gas permeation-separation performance were investigated. The effect of the addition of the second amine monomer was also investigated. The result showed that incorporating the second comonomer into the aqueous phase improved the gas permeation-separation performance. The optimum membranes with a hyperbranched copolyimide layer synthesized by using the equimolar Jeffamine® T403 and Jeffamine® ED2003 showed a high CO<sub>2</sub> permeance of 1085 GPU accompanied by a high ideal separation factor of 106.7. The effects of the operating temperature, the operating pressure, and the aging time on the gas permeation-separation performance were investigated. The results showed the membranes had good anti-plasticization and anti-aging properties. The separation properties for the CO<sub>2</sub>/N<sub>2</sub> mixture in the dry state and in the humidified state were also evaluated. The effects of the pressure ratio and stage cut on the product purity and recovery were investigated. The results showed great practical application potential in the efficient removal of CO<sub>2</sub> from the CO<sub>2</sub>/N<sub>2</sub> mixture.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"736 ","pages":"Article 124730"},"PeriodicalIF":9.0,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145109165","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

Efficient and stable CO2 reduction using quaternary ammonium-based high-durability polymer membrane and ionomer in zero-gap electrolyzers 在零间隙电解槽中使用季铵盐基高耐久性聚合物膜和离子单体实现高效稳定的CO2还原

IF 9 1区工程技术

Journal of Membrane Science Pub Date : 2025-09-19 DOI: 10.1016/j.memsci.2025.124724

Young Eun Kim , Ji Hee Kim , Hugeun Kwon , Hyejin Lee , Hyo Jun Min , Byungchan Bae , You Na Ko , Dong Hyun Chun , Min Hye Youn , Geun Bae Rhim , Kwang Young Kim , Jong Hak Kim , Dongwon Shin

{"title":"Efficient and stable CO2 reduction using quaternary ammonium-based high-durability polymer membrane and ionomer in zero-gap electrolyzers","authors":"Young Eun Kim , Ji Hee Kim , Hugeun Kwon , Hyejin Lee , Hyo Jun Min , Byungchan Bae , You Na Ko , Dong Hyun Chun , Min Hye Youn , Geun Bae Rhim , Kwang Young Kim , Jong Hak Kim , Dongwon Shin","doi":"10.1016/j.memsci.2025.124724","DOIUrl":"10.1016/j.memsci.2025.124724","url":null,"abstract":"<div><div>Anion exchange membranes and ionomers are key components to efficient and stable CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR) in electrolyzers. However, their roles at the membrane electrode assembly (MEA) level remain underexplored despite recent advances in CO<sub>2</sub>RR technology. This study investigated physicochemical properties of a quaternary benzyl ammonium (QBA)-based membrane and commercial membranes to identify key descriptors enhancing CO<sub>2</sub>RR for CO production. The QBA membrane possessed high anion conductivity, low swelling ratio, and chemical/mechanical durability. In addition, the QBA ionomer formed a hydrophobic and porous catalyst layer to increase mass transfer and suppress the hydrogen evolution reaction. The MEA with a QBA-based membrane and ionomer binder showed high CO Faradaic efficiencies (FE<sub>CO</sub>) of 90–96% over a wide cell voltage range (1.8–2.5 V) at 343 K. The CO partial current density of the QBA increased with cell voltage and reached 251.53 mA cm<sup>−2</sup> at 2.5 V. The QBA exhibited long-term stability at 200 mA cm<sup>−2</sup>, FE<sub>CO</sub> above 80% for 350 h, and FE<sub>CO</sub> above 70% for the next 150 h while maintaining a cell voltage of 2.43 V. Moreover, QBA exhibited lower sensitivity to relative humidity than the commercial FAA membrane and ionomer, enabling stable CO<sub>2</sub>RR under varying operating conditions. The high CO<sub>2</sub>RR performance and long-term stability resulted from the synergistic effect of the QBA membrane and ionomer.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"738 ","pages":"Article 124724"},"PeriodicalIF":9.0,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157008","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

Blended polyhalogenated membranes exhibiting a wide dynamic range for He/CH4 separation 混合多卤化膜具有较宽的He/CH4分离动态范围

IF 9 1区工程技术

Journal of Membrane Science Pub Date : 2025-09-19 DOI: 10.1016/j.memsci.2025.124715

Lucas C. Condes, Aditi Gali, Shivam D. Patel, Bryce A. Goodin, Michele Galizia

{"title":"Blended polyhalogenated membranes exhibiting a wide dynamic range for He/CH4 separation","authors":"Lucas C. Condes, Aditi Gali, Shivam D. Patel, Bryce A. Goodin, Michele Galizia","doi":"10.1016/j.memsci.2025.124715","DOIUrl":"10.1016/j.memsci.2025.124715","url":null,"abstract":"<div><div>In this study, a polymer blending approach is proposed to fabricate membranes exhibiting wide dynamic range for helium/methane separation. Poly(PFMMD-co-CTFE-50), a 50:50 mol.% copolymer of perfluoro(2-methylene-4-methyl-1,3-dioxolane) (PFMMD) and chlorotrifluoroethylene (CTFE) exhibiting high helium/methane selectivity and low helium permeability, was blended with Teflon AF2400, a commercial perfluoropolymer exhibiting low helium/methane selectivity and ultra-high helium permeability. Remarkably, by simply changing the blend composition, the pure- and mixed-gas helium permeability and helium/methane selectivity of the blended membranes move along the 2008 Robeson upper bound while spanning multiple orders of magnitude, which makes these membranes capable of operating with a wide dynamic range, a feature that could enable harvesting helium from streams exhibiting different compositions. As shown by thermal analysis, atomic force microscopy (AFM), interfacial energy measurements and Flory-Huggins modeling, all blends exhibit a phase-separated morphology, irrespective of their composition and fabrication protocol. It was demonstrated that the larger polarity of the C–Cl bond relative to the C–F bond and the much larger surface energy of poly(PFMMD-co-CTFE-50) relative to Teflon AF2400 renders the interaction between the two polymers highly unfavorable. Theoretical analysis of permeability data with the generalized Maxwell model reveals additional details regarding the blend microstructure and morphology, which are in reasonable agreement with AFM results.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"738 ","pages":"Article 124715"},"PeriodicalIF":9.0,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128185","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

Porous branched polybenzimidazole membranes with high ion conductivity and selectivity for vanadium flow battery 用于钒液流电池的高离子电导率和选择性多孔支链聚苯并咪唑膜

IF 9 1区工程技术

Journal of Membrane Science Pub Date : 2025-09-19 DOI: 10.1016/j.memsci.2025.124725

Xiyang Liu , Deqi Zeng , Wenheng Huang , Jinchao Li , Liang Chen , Qin Chen , Ming Wang , Yaping Zhang

{"title":"Porous branched polybenzimidazole membranes with high ion conductivity and selectivity for vanadium flow battery","authors":"Xiyang Liu , Deqi Zeng , Wenheng Huang , Jinchao Li , Liang Chen , Qin Chen , Ming Wang , Yaping Zhang","doi":"10.1016/j.memsci.2025.124725","DOIUrl":"10.1016/j.memsci.2025.124725","url":null,"abstract":"<div><div>Developing a high-performance membrane is essential for advancing the commercialization of vanadium flow battery (VFB). Although polybenzimidazole membrane exhibits multiple beneficial characteristics, its practical implementation in VFB is constrained by insufficient ion conductivity and the trade-off effect between ion conductivity and selectivity. Herein, the porous branched polybenzimidazole (PBPBI) membranes were fabricated through the combination of molecular structure regulation and non-solvent induced phase separation strategies. The PBPBI membrane can achieve high ion conductivity and selectivity, which effectively enhanced the efficiencies of VFB. Exhilaratingly, the optimized PBPBI-4 membrane exhibited an ion conductivity of 36.8 mS cm<sup>−1</sup>, surpassing that of Nafion 212 membrane (30.3 mS cm<sup>−1</sup>). Additionally, the ion selectivity of PBPBI-4 membrane (5.99 × 10<sup>6</sup> S min cm<sup>−3</sup>) was substantially superior to Nafion 212 membrane (5.64 × 10<sup>4</sup> S min cm<sup>−3</sup>). Both ion conductivity and selectivity values of PBPBI-4 membrane remain a top level compared with polybenzimidazole membranes developed in recent five years for VFB applications. The PBPBI-4 membrane exhibited superior coulomb efficiencies (96.09 %–98.18 %), voltage efficiencies (72.11 %–91.07 %) and energy efficiencies (70.80 %–87.51 %) to Nafion 212 membrane under current densities ranged from 80 to 300 mA cm<sup>−2</sup>. Moreover, the 700 VFB cycles of PBPBI-4 membrane at 140 mA cm<sup>−2</sup> were also stably executed, which confirmed outstanding structural and mechanical stabilities. Therefore, the PBPBI-4 membrane demonstrates a significant potential for implementation in VFB system.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"736 ","pages":"Article 124725"},"PeriodicalIF":9.0,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106163","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

Accelerating inverse design of thin-film composite polyamide membranes for water purification via fragment-based machine learning 基于片段的机器学习加速水净化用薄膜复合聚酰胺膜的逆向设计

IF 9 1区工程技术

Journal of Membrane Science Pub Date : 2025-09-18 DOI: 10.1016/j.memsci.2025.124719

Jun Ma , Hang Xu , Meng Zhang , Jingjun Wang , Ao Wang , Tao Lin , Mingmei Ding

{"title":"Accelerating inverse design of thin-film composite polyamide membranes for water purification via fragment-based machine learning","authors":"Jun Ma , Hang Xu , Meng Zhang , Jingjun Wang , Ao Wang , Tao Lin , Mingmei Ding","doi":"10.1016/j.memsci.2025.124719","DOIUrl":"10.1016/j.memsci.2025.124719","url":null,"abstract":"<div><div>Thin-film composite polyamide (TFC PA) membranes are renowned for their excellent liquid separation capabilities. Developing novel monomers through the relationship between the chemical structures and performance will help accelerate the development of TFC membranes. Here, machine learning (ML) is employed to guide the rational design of TFC PA membranes. A comprehensive dataset integrating monomer fragments, synthetic and operation conditions, and properties of both membranes and solutes was used to train ML models. Fragment-based Catboost models exhibit robust predictive capability for both permeance and solute rejection. The feature contribution analysis revealed that the frgament of monomers such as amine and methylene groups, as well as pore size and anion radius, are paramount determinants for performance. Leveraging the well-trained model for multi-objective screening, top-performing membranes are efficiently identified from a pool of 133864 candidates. Experimental validation confirmed that two ML-identified TFC PA membranes exhibited enhanced permeance while sustaining high Na<sub>2</sub>SO<sub>4</sub> rejection. This work presents a novel approach that shifts the paradigm in the inverse design of TFC membranes and can be extended to other material systems for accelerated materials discovery.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"736 ","pages":"Article 124719"},"PeriodicalIF":9.0,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106160","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

Hierarchical core–shell CaA zeolite fillers via impregnation-assisted synthesis for enhanced CO2/N2 separation in mixed-matrix membranes 浸渍辅助合成分级核壳型CaA沸石填料以增强混合基质膜中CO2/N2的分离

IF 9 1区工程技术

Journal of Membrane Science Pub Date : 2025-09-18 DOI: 10.1016/j.memsci.2025.124714

Hye Leen Choi, Yeanah Jeong, Sangmin Ha, Tae-Hyun Bae

{"title":"Hierarchical core–shell CaA zeolite fillers via impregnation-assisted synthesis for enhanced CO2/N2 separation in mixed-matrix membranes","authors":"Hye Leen Choi, Yeanah Jeong, Sangmin Ha, Tae-Hyun Bae","doi":"10.1016/j.memsci.2025.124714","DOIUrl":"10.1016/j.memsci.2025.124714","url":null,"abstract":"<div><div>In this study, we report a novel strategy for synthesizing hierarchical LTA-type core–shell zeolites (Meso@Micro-CaA) via an impregnation-assisted dry-gel conversion method. The resulting structure features a mesoporous CaA core to promote rapid gas diffusion, encased in a microporous CaA shell that provides molecular sieving functionality and prevents polymer chain intrusion. This architecture enables high CO<sub>2</sub>/N<sub>2</sub> selectivity without sacrificing permeability, owing to minimized diffusion resistance from the thin microporous shell. The dry-gel conversion process offers key advantages over conventional hydrothermal synthesis, including simplified operation, suppression of unwanted nucleation, uniform shell formation, reduced water consumption, and shorter synthesis time. The synthesized Meso@Micro-CaA exhibits a well-defined hierarchical pore structure with interconnected mesopores (∼12 nm) and micropores (∼0.5 nm), resulting in a high surface area and enhanced CO<sub>2</sub> adsorption capacity. When incorporated into Pebax® 1074-based mixed-matrix membranes (MMMs) at 30 wt% loading, Meso@Micro-CaA achieved a CO<sub>2</sub> permeability of 209 Barrer and a CO<sub>2</sub>/N<sub>2</sub> selectivity of 121.3, exceeding the 2019 upper bound. These improvements are attributed to the synergistic effects of hierarchical porosity and the core–shell design. This work demonstrates the potential of hierarchical core–shell zeolites as next-generation fillers for high-performance membrane-based gas separation and presents a versatile synthesis platform applicable to other zeolite topologies.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"736 ","pages":"Article 124714"},"PeriodicalIF":9.0,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118310","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

All-natural clay–carbonate nanofluidic membranes with engineered nanochannels for high-power osmotic energy harvesting 具有工程纳米通道的纯天然粘土-碳酸盐纳米流体膜，用于高功率渗透能量收集

IF 9 1区工程技术

Journal of Membrane Science Pub Date : 2025-09-18 DOI: 10.1016/j.memsci.2025.124721

Chao Liu , Guanlin Huo , Dehai Yu , Di Yuan , Junyi Shi , Qiang Wang , Fengshan Zhang , Dandan Ji

{"title":"All-natural clay–carbonate nanofluidic membranes with engineered nanochannels for high-power osmotic energy harvesting","authors":"Chao Liu , Guanlin Huo , Dehai Yu , Di Yuan , Junyi Shi , Qiang Wang , Fengshan Zhang , Dandan Ji","doi":"10.1016/j.memsci.2025.124721","DOIUrl":"10.1016/j.memsci.2025.124721","url":null,"abstract":"<div><div>Salinity gradient osmosis is a clean, sustainable power source via osmosic energy, however, favourable practical application through reverse electrodialysis (RED) is thwarted by the prohibitive expense and technical complexity of ion-permeable membranes. We herein introduce an eco-friendly nanofluidic membrane made of the natural montmorillonite (MMT) clay intercalated with nanoscale calcium carbonate (nano-CaCO<sub>3</sub>) termed as the upcycled material obtained from discarded eggshells. The nano-CaCO<sub>3</sub> acts as a biogenic intercalant which extends the MMT spacing of the interlayer and enhances surface charge density, thereby increasing cationic flux and selectivity. The optimized composite membrane (designed as MC<sub>0.10</sub>, with 10 wt% of CaCO<sub>3</sub>) reaches a maximum power density of 10.28 W m<sup>−2</sup> under a 500-fold gradient of NaCl and outcompetes most of the conventional counterparts. The membrane is also shown to be very stable for 30 RED cycles (≈300 h) with a cation transport number t<sup>+</sup> = 0.81 and a maximum power density obtained of 25.6 % of the energy conversion efficiency (η<sub>max</sub>). Bulk structural and elemental analyses confirm the enlargement of the nanochannels and charging of the nanochannels under the inclusion of nano-CaCO<sub>3</sub>. This all-natural membrane approach membrane approach not only enhances osmotic energy harvesting functionality but also supports sustainable resource exploitation by upcycling the waste eggshells, providing a scalable and cost-efficient application for the blue power generation.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"736 ","pages":"Article 124721"},"PeriodicalIF":9.0,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106156","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-performance ionic covalently modified polyamide acid membrane for osmotic energy conversion 用于渗透能转换的高性能离子共价改性聚酰胺酸膜

IF 9 1区工程技术

Journal of Membrane Science Pub Date : 2025-09-18 DOI: 10.1016/j.memsci.2025.124682

Jianwei He, Xuejiang Li, Jin Zhai, Xia Fan, J. He, X. Li, J. Zhai, X. Fan

{"title":"High-performance ionic covalently modified polyamide acid membrane for osmotic energy conversion","authors":"Jianwei He, Xuejiang Li, Jin Zhai, Xia Fan, J. He, X. Li, J. Zhai, X. Fan","doi":"10.1016/j.memsci.2025.124682","DOIUrl":"10.1016/j.memsci.2025.124682","url":null,"abstract":"<div><div>Nanofluidic membranes exhibit considerable promise for osmotic energy harvesting. However, a persistent challenge lies in engineering porous structures that simultaneously facilitate rapid, high-flux ion transport while maintaining high selectivity and robust mechanical strength. Herein, we introduce a strategy that leverages the coordination interaction between Cu<sup>2+</sup> ions and the carboxyl groups on polyamide acid (PAA) molecular chains to transform an initially dense PAA membrane into one with a uniform nanoporous architecture. The resultant PAA-Cu composite membrane achieves an exceptionally high-power density of 187 W/m<sup>2</sup> in osmosis energy conversion tests with a 50-fold KCl concentration gradient (0.5 M/0.01 M), a performance that substantially surpasses other state-of-the-art materials. This superior performance is attributed to the nanoporous network created by copper ion coordination, which concurrently maintains high ion selectivity while significantly enhancing the overall ion transport flux. Notably, the PAA-Cu membrane was fabricated at a large scale (up to 390 cm<sup>2</sup>) and exhibited a high tensile strength of 83 MPa, demonstrating the mechanical robustness required for practical applications. This strategy of synergistically optimizing the membrane's pore structure and surface chemistry through metal coordination offers a promising new avenue for designing next-generation nanofluidic membranes for osmotic energy harvesting.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"736 ","pages":"Article 124682"},"PeriodicalIF":9.0,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106162","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}

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