Journal of Membrane Science最新文献

{"title":"Polymer-blend thin-film composite membranes with semi-IPN architecture for enhanced CO2 separation and mechanical robustness","authors":"Na Yeong Oh ,&nbsp;Jin Hyuk Kim ,&nbsp;Hyoshin Kwak ,&nbsp;Byulhana Min ,&nbsp;Jong Hak Kim","doi":"10.1016/j.memsci.2025.124752","DOIUrl":"10.1016/j.memsci.2025.124752","url":null,"abstract":"<div><div>Scalable thin-film composite (TFC) membranes with high CO₂ separation performance and robust mechanical durability are essential for industrial carbon capture. In this study, we present the design and fabrication of fully polymeric, high-performance TFC membranes based on a semi-interpenetrating polymer network (semi-IPN) architecture. A self-crosslinkable, comb-shaped copolymer—poly(glycidyl methacrylate-g-polypropylene glycol)-co-poly(oxyethylene methacrylate) (PGP-POEM)—was synthesized as a CO₂-selective matrix. To mitigate tackiness and improve mechanical strength, a small amount of commercial Polyactive was blended, forming a miscible semi-IPN with strong compatibility and synergistic interactions. Molecular dynamics (MD) simulations were employed to analyze free volume, thermodynamic miscibility, CO₂ affinity, diffusivity, and solubility. The optimized membrane containing 25 wt% Polyactive exhibited a CO₂ permeance of 1482 GPU and a CO₂/N₂ selectivity of 36.3, meeting benchmarks for post-combustion capture. Additionally, the membranes demonstrated excellent mechanical properties, with a tensile modulus of 1.15 MPa and an elongation at break of 161 %, while maintaining a non-tacky surface. These results highlight the potential of the semi-IPN approach as a scalable and cost-effective strategy for advanced gas separation membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"738 ","pages":"Article 124752"},"PeriodicalIF":9.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218437","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":"Localized covalent crosslinking of poly(p-terphenyl pyridine) by radial 1,3,5-tricarbazolylbenzenes for preparation of high-temperature proton exchange membranes","authors":"Songbo Nan ,&nbsp;Yang Zhang ,&nbsp;Shuo Qiu ,&nbsp;Shunqiang Ding ,&nbsp;Qinchen Zhang ,&nbsp;Siyu Liu ,&nbsp;Ronghuan He","doi":"10.1016/j.memsci.2025.124748","DOIUrl":"10.1016/j.memsci.2025.124748","url":null,"abstract":"<div><div>High-temperature proton exchange membranes (HT-PEMs) with excellent swelling resistance are highly desirable to promote the safety, reliability and durability of fuel cells. Herein, we propose poly (<em>p</em>-terphenyl co <em>1,3,5</em>-tri (<em>9</em>H-carbazol-<em>9</em>-yl) benzene pyridine) polymers (PTP/<em>x</em>%TCB, <em>x</em> refers to the crosslinking degree) featuring locally high-density crosslinking network structure. These crosslinked membranes exhibit the same solubility as that corresponded pristine membranes in commonly used organic solvents. This is different from the prepared membranes with the conventional crosslinking networks. Moreover, the prepared PTP/<em>x</em>%TCB membranes preserve sufficient free volume for phosphoric acid (PA) doping and ion conduction as proved by free volume fraction of the membrane. The volume swelling ratio of PTP/2%TCB membrane decreases by 50 % compared to that of the PTP membrane having the same PA uptake of 206 <em>wt</em>%. This indicates that the locally high-density crosslinking structure can effectively inhibit the plasticizing effect of the doped PA. The acid-doped PTP/2%TCB membrane delivers a proton conductivity of 123 mS cm⁻¹ at 160°C. This membrane-based H₂/O₂ fuel cell exhibits a peak power density of 972 mW cm⁻² and a specific power of 1620 mW mg⁻¹ (Pt loading: 0.6 mg cm⁻²) without backpressure. Additionally, more fuel cell demonstrations with backpressure of 2.5 bar for both anode and cathode, as well as durability test at different current densities with start-stop cycling operation are made.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"738 ","pages":"Article 124748"},"PeriodicalIF":9.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218542","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 organic polymer membranes derived from tetramine-based Tröger's base with simultaneously enhanced permeability and selectivity","authors":"Mengtao Wang ,&nbsp;Chulong Chen ,&nbsp;Luxin Sun ,&nbsp;Congcong Wu ,&nbsp;Kai Song ,&nbsp;Aqib Riaz ,&nbsp;Xuepeng Li ,&nbsp;Xiaohua Ma","doi":"10.1016/j.memsci.2025.124750","DOIUrl":"10.1016/j.memsci.2025.124750","url":null,"abstract":"<div><div>Combining the advantages of polymers of intrinsic microporosity (PIM) and porous organic polymer (POP) is a very promising method for achieving high-efficiency gas separation membranes. In this study, we successfully synthesized a series of novel POP membranes derived from a highly crosslinked Tröger's base (TB), using 3,3′-dimethylbiphenyl-4,4′-diamine as a linear part and 4,5-bis(4-aminophenyl)-[1,1:2,1-terphenyl]-4,4-diamine (TPDA) as crosslinker that contains four nodes. The resulting POP network membranes showed reduced interchain spacing from 7.96 to 5.76 Å, significantly increased Brunauer-Emmett-Teller (BET) surface area from 250 to 534 m² g⁻¹, and markedly enhanced ultramicroporosity from TPDA-0 to TPDA-100. Compared to the linear TPDA-0, the crosslinked membranes demonstrated marked improvement in gas permeability and gas pair selectivity. For example, the TPDA-100 exhibited ∼10 times higher O₂ permeability (507 <em>vs.</em> 50.3 Barrer) along with an improved O₂/N₂ selectivity (4.7 <em>vs.</em> 4.5) compared to the linear TPDA-0. With the increasing of TPDA content, the overall gas separation performance gradually increased from far below to surpass the 2008 Robeson Upper bound limits for O₂/N₂, H₂/N₂, and H₂/CH₄. These enhancements are attributed to the higher ultramicroporosity volume and concentration originated from the in-situ crosslinked POP structure. This direct synthesis strategy provides a promising and scalable strategy for developing high-performance gas separation membrane materials.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"738 ","pages":"Article 124750"},"PeriodicalIF":9.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218388","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":"Characterizing the permeability of a foulant layer under a transient applied pressure","authors":"José Agustín Epstein ,&nbsp;Guy Z. Ramon","doi":"10.1016/j.memsci.2025.124683","DOIUrl":"10.1016/j.memsci.2025.124683","url":null,"abstract":"<div><div>Pressure-driven membrane filtration systems are commonly operated at constant pressure, under which the presence of polymeric foulants deposited on the membrane surface leads to a decline in permeate flux. In the absence of further deposition, the polymeric foulant layer would typically compact in response to the permeate flow, resulting in a constant hydraulic resistance and a steady-state permeate flux lower than that of the clean membrane. However, the transient permeability of these soft, deformable porous layers remains poorly understood. Using a customized microfluidic nanofiltration system, we experimentally investigate the transient behavior of a porous deformable film under pressure steps and pressure waveforms. We demonstrate that a membrane fouled with a hydrogel layer can exhibit a transient permeability shift immediately after a sudden change in applied pressure. Moreover, this transient state suggests that compaction and swelling of the soft porous layer follow two different processes, involving distinct relaxation times and permeate volumes during the transient window induced by pressure increases and decreases, respectively. In addition, by imposing pressure waveforms, we show that a non-linear flow response arises as a result of the asymmetric dynamics of swelling and compaction of the soft material. Lastly, we demonstrate that such observations can have practical implications, as the non-linear flow response to oscillatory pressure can, in some cases, generate an enhanced overall permeability when compared to the averaged value of the pressure periodic function.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"738 ","pages":"Article 124683"},"PeriodicalIF":9.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218436","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 free-volume hyperbranched poly(aryl piperidinium) anion exchange membranes based on noncoplanar V-shaped Tröger Base-Carbazole derivative with synergistic enhancement of ionic conductivity and dimensional stability for water electrolysis","authors":"Sihan Li ,&nbsp;Yingqing Zhan ,&nbsp;Jie Liu ,&nbsp;Xinyue Duan ,&nbsp;Junlei Tang ,&nbsp;Wei Zhao ,&nbsp;Ping Zhang","doi":"10.1016/j.memsci.2025.124751","DOIUrl":"10.1016/j.memsci.2025.124751","url":null,"abstract":"<div><div>The practical application of poly(aryl piperidinium) AEMs in water electrolysis is constrained by two major technical bottlenecks: (1) conformational distortion of the piperidine group reducing alkaline stability; (2) tight packing of polymer main chain hindering OH⁻ transport. In this study, the noncoplanar V-shaped Tröger Base-Carbazole derivative, 2,8-di(<em>N</em>-carbazolyl)-6H,12H-5,11-methano-dibenzo[b,f][1,5]diazocine (CTB), was designed and introduced into poly(aryl piperidinium) chain, thus obtaining a series of hyperbranched AEMs. Compared with linear polymer chain, the unique V-shaped three-dimensional structure in CTB inhibited tight packing of polymer and increased free volume within the membrane, thereby effectively enhancing the migration rate of OH⁻. At 80 °C, the QPCTB-PEG-TP-5 achieved a high ionic conductivity of 159.79 mS/cm with a low ion exchange capacity (1.108 mmol/g), while maintaining the swelling ratio below 8.5 %. Additionally, the electrostatic potential analysis and ¹H NMR spectroscopy revealed that the bridged methylene groups in CTB protected piperidine cationic groups from Hoffmann elimination. After treatment in 1 M KOH medium at 60 °C for 1000 h, the OH⁻ conductivity retention rate and tensile strength reached 80.72 % and 21.71 MPa, respectively. The favorable OH⁻ conductivity, mechanical strength, and alkaline stability strongly supported the application of AEM in water electrolysis. The AEMWE equipped with QPCTB-PEG-TP-5 type AEM achieved an instantaneous current density of 608 mA/cm² (60 °C, 1.51 V) and operated stably for 120 h without degradation at a current density of 250 mA/cm². Therefore, the molecular structure design of hyperbranched poly(aryl piperidinium) AEMs based on noncoplanar V-shaped Tröger Base-Carbazole derivative provides an effective approach to solve the dual challenge of poor alkaline stability and low ionic conductivity.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"738 ","pages":"Article 124751"},"PeriodicalIF":9.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218487","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":"Electrostatic-driven dopamine confined covalent organic frameworks membrane for enhancing hydrogen separation","authors":"Guiping Yang ,&nbsp;Junxuan Yao ,&nbsp;Yuxin Wen ,&nbsp;Shuning Liu ,&nbsp;Yuhe Mu ,&nbsp;Jingrui Fan ,&nbsp;Xiaobo Liu ,&nbsp;Chengbing Yu ,&nbsp;Gaofeng Zeng","doi":"10.1016/j.memsci.2025.124735","DOIUrl":"10.1016/j.memsci.2025.124735","url":null,"abstract":"<div><div>Two-dimensional covalent organic frameworks (2D COFs) demonstrate significant potential for gas separation due to their crystalline nanochannels and structural tunability, yet practical implementation is constrained by inherent pore size limitations (&gt;0.8 nm) and processing challenges. Herein, we engineered a Tp-PaSO₃H–COF-PDA composite membrane through an electrostatic-driven infusion of dopamine (DA) into solvothermally synthesized Tp-PaSO₃H–COF channels on α-Al₂O₃ supports. The resulting composite membranes own dual-function separation mechanisms. Pore size reduction enhances molecular sieving capabilities, resulting in an improvement in the separation performance of H₂/N₂ and H₂/CH₄. Concurrently, amino-rich polydopamine (PDA) networks provide specific CO₂ affinity sites that selectively hinder CO₂ transport, leading to further improved H₂/CO₂ separation performance. The membrane demonstrates operational stability under varying transmembrane pressures, feed compositions, temperatures, and extended operation. This confinement strategy transforms conventional covalent organic frameworks into precision separation platforms for sustainable hydrogen purification.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"738 ","pages":"Article 124735"},"PeriodicalIF":9.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218539","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":"Nitrogen-enriched porous organic polymers for high-performance CO2/N2 separation in mixed-matrix membranes","authors":"Yeanah Jeong,&nbsp;Younghun Kim,&nbsp;Woosung Jeong,&nbsp;Hye Leen Choi,&nbsp;Jihan Kim,&nbsp;Tae-Hyun Bae","doi":"10.1016/j.memsci.2025.124749","DOIUrl":"10.1016/j.memsci.2025.124749","url":null,"abstract":"<div><div>The development of high-performance mixed matrix membranes (MMMs) for CO₂/N₂ separation requires fillers that simultaneously enhance gas permeability and selectivity without introducing interfacial defects. In this study, we report the synthesis of nitrogen-containing porous organic polymers (POPs) via a one-step Friedel–Crafts polymerization, designed to introduce CO₂-philic functional groups directly into the polymer backbone while preserving intrinsic porosity. Structural and gas sorption analyses confirmed that the synthesized POPs exhibit high microporosity, surface area, and nitrogen content, which together enhance CO₂ adsorption affinity. When incorporated into Matrimid-based MMMs, the POPs significantly improved CO₂ permeability and CO₂/N₂ selectivity, with the pp-tpta filler (containing the highest nitrogen content) delivering the most pronounced performance enhancement. Further optimization using a high-permeability 6FDA-DAM polyimide matrix yielded a membrane with a CO₂ permeability of 1967 Barrer and a selectivity of 33.4 at 20 wt% pp-tpta loading, surpassing the 2008 Robeson Upper Bound. Solubility–diffusivity analyses, supported by both experimental measurements and molecular dynamics simulations, revealed that the pp-tpta filler enhances CO₂/N₂ separation primarily by increasing CO₂ solubility and diffusivity within the membrane matrix. These results underscore the potential of rationally designed, nitrogen-rich POP fillers as effective, scalable materials for advanced gas separation membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"738 ","pages":"Article 124749"},"PeriodicalIF":9.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218435","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":"An improved conductive SPEEK composite membrane for vanadium flow battery enabled by comb-like amphoteric maleic anhydride polymer","authors":"Shasha Shi,&nbsp;Lang Li,&nbsp;Xinrui Cui,&nbsp;Lei Pang,&nbsp;Meijing Sun,&nbsp;Haifeng Shi","doi":"10.1016/j.memsci.2025.124743","DOIUrl":"10.1016/j.memsci.2025.124743","url":null,"abstract":"<div><div>In this work, we report a series of composite membranes (S/SPSDA) with sulfonated poly(ether ether ketone) (SPEEK) as membrane matrix and amphoteric comb-like SPSDA polymer as a structural modifier (SPSDA), synthesized from the ring-opening process of maleic anhydride of poly(styrene-co-maleic anhydride) (SMA) by grafting 2,4-diaminobenzene sulfonic acid (DABSA) on the SMA skeleton, by a simple solution-blending method. With various contents of SPSDA from 5 % to 20 wt%, the S/SPSDA membranes exhibit excellent physicochemical properties involving conductivity and selectivity owing to their formed interfacial interactions and cooperative main-/side-chain proton transportation channel, and the S/SPSDA-10 membrane displays significantly reduced vanadium ion permeability (15.5 × 10⁻⁷ cm² min⁻¹) and enhanced proton conductivity (31.9 mS cm⁻¹) compared to SPEEK and Nafion 212. Furthermore, higher coulombic efficiency (CE: 97.5–99.3 %) and energy efficiency (EE: 83.0–68.5 %) at 100–200 mA cm⁻² current densities, 600 charge-discharge cycles at 150 mA cm⁻² with 98.0 % CE and 76.0 % EE, as well as longer self-discharge time of 83.5 h demonstrate better operation stability and durability of the S/SPSDA-10 membrane with superior proton transport capability and vanadium ion resistance. In addition, a 33 % charging capacity retention rate at the first 100 cycles and increased chemical stability elucidate a satisfactory permeability-conductivity tradeoff effect, indicating that amphoteric comb-like SPSDA polymer affords the structural stability and the construction of proton network by assembling strong acid-base interaction and main-/side-chain bi-sulfonated transport channels. Thus, manipulating the main-/side-chain topological structure in a comb-like polymer offers a facile method to explore and develop high-performance composite membranes for achieving long-term and highly efficient electrochemical energy storage applications.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"738 ","pages":"Article 124743"},"PeriodicalIF":9.0,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157565","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":"Efficiently ion-selective polybenzimidazole membrane with precisely controlled channels and hydrogen-bond networks for flow batteries","authors":"Haoren Zheng ,&nbsp;Yulin Wu ,&nbsp;Xin Liu ,&nbsp;Pengzhu Gai ,&nbsp;Dezhu Zhang ,&nbsp;Yixing Wang ,&nbsp;Kang Huang ,&nbsp;Zhi Xu","doi":"10.1016/j.memsci.2025.124733","DOIUrl":"10.1016/j.memsci.2025.124733","url":null,"abstract":"<div><div>Polybenzimidazole (PBI) exhibits exceptional chemical stability and mechanical strength, positioning it as a highly promising material for ion conductive membranes (ICMs). However, its relatively low proton conductivity limits its performance in vanadium flow batteries (VFBs). In this study, we construct ultrafast proton-conducting molecularly mixed composite membranes (MMCMs) by strategically introducing organic macrocyclic cavitands (OMCs), especially 4-sulfocalix[6]arene (SCA6), into the PBI matrix. The open macrocyclic cavity of SCA6 modulates the channels of PBI membrane, thus facilitating proton transport, while its intrinsic cavity (diameter of ∼0.6 nm) effectively restricts vanadium permeation. Meanwhile, the <strong>–</strong>SO₃H groups form an extensive and continuous hydrogen-bonding network within the membrane, which greatly enhances proton conductivity. The synergistic combination of precisely controlled channels and hydrogen-bond networks enables efficient ion-selective transport. Experimental results demonstrate that the MMCMs exhibit an excellent energy efficiency (EE) of 80.56 % at 220 mA cm⁻² and achieve long-term stability of 1700 cycles (&gt;1350 h) in the VFB system at 200 mA cm⁻². Our work provides a facile preparation method for highly ion-selective PBI-based battery membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"738 ","pages":"Article 124733"},"PeriodicalIF":9.0,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157568","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":"GO-ZnO-PNIPAM temperature response smart nanofiltration membrane with self-cleaning capability for wastewater treatment","authors":"Zeshan Sun,&nbsp;Peng Kong,&nbsp;Yihan Wang,&nbsp;Yibin Liang,&nbsp;Haoxuan Zhang,&nbsp;Yu Song,&nbsp;Yanxin Wang,&nbsp;Jianguo Tang,&nbsp;Linjun Huang","doi":"10.1016/j.memsci.2025.124737","DOIUrl":"10.1016/j.memsci.2025.124737","url":null,"abstract":"<div><div>Membrane separation is a very reliable technology for water purification. Based on the performance of graphene oxide (GO) nanofiltration membranes, this paper uses a physical intercalation composite process to create a GO-ZnO-PNIPAM nanofiltration membrane. This membrane has temperature-responsive and photocatalytic self-cleaning functions. It combines temperature-sensitive PNIPAM with ZnO, which is grown on the surface of GO. The membrane exhibited excellent separation performance with maximum retention rates of 99.77 %, 99.46 %, 99.98 %, 98.10 %, and 83.43 % for five dyes and 87.2 % for sodium nitrite (NaNO₂). This performance was significantly better than that of a GO nanofiltration membrane. Meanwhile, the PNIPAM's temperature-sensitive property allowed for variation in water flux at different temperatures, reaching a maximum of 59.63 L m⁻² h⁻¹ bar⁻¹, which was 3.38 times higher than that of GO nanofiltration membrane (17.62 L m⁻² h⁻¹ bar⁻¹). Additionally, the GO-ZnO membrane has a UV-catalyzed self-cleaning ability. The GO-ZnO-PNIPAM nanofiltration membrane can degrade surface-adsorbed pollutants under UV light with a maximum recovery rate of 99.06 %. This dual-function design strategy, combining temperature response and self-cleaning, provides an innovative solution for developing energy-efficient water treatment technology.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"736 ","pages":"Article 124737"},"PeriodicalIF":9.0,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155299","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}