Journal of Membrane Science最新文献

{"title":"Superhydrophilic modification of polytetrafluoroethylene (PTFE) hollow fiber membrane by a novel miniemulsion template method","authors":"Zhichao Wu ,&nbsp;Xiaotong Hao ,&nbsp;Mingyuan Wu ,&nbsp;Qingyun Wu ,&nbsp;Jianjun Yang ,&nbsp;Jiuyi Liu ,&nbsp;Jianan Zhang","doi":"10.1016/j.memsci.2025.123920","DOIUrl":"10.1016/j.memsci.2025.123920","url":null,"abstract":"<div><div>During the hydrophilic modification of PTFE hollow fiber membranes, the modifying substances often block the pores upon crosslinking. This blockage can lead to unsatisfactory water flux, despite the enhanced hydrophilicity of the membranes. Herein, we proposed a miniemulsion template method to solve the above problems, where water soluble polyvinyl alcohol (PVA) and crosslinking agent glutaraldehyde (GA) were selected to modify the PTFE membrane. The PTFE membrane was premoistened with isopropyl alcohol (IPA) and then immersed in a miniemulsion template environment. The miniemulsion droplets and PVA macromolecules gradually diffused into the membrane pores and occupied the membrane voids to realize the displacement with IPA. The PVA macromolecules distributed around the miniemulsion droplets reacted with the crosslinking agent to form a crosslinked network that coated the membrane fibers. After removing the miniemulsion template, the occupied voids were released, thus providing channels for water transport and preventing pore blockage following the crosslinking of the modified substances. The modified PTFE membrane exhibits superior hydrophilicity and high water flux. The water flux can reach 1624.64 ± 20.82 L/(m²·h) at the operating pressure of 0.04 MPa. After 16 days of soaking in strong acid (pH = 2), strong alkali (pH = 12), and a strong oxidizing agent (2000 ppm NaClO), the modified membrane retains its hydrophilic properties, demonstrating excellent chemical stability, better antifouling, and oil-water separation performance. Therefore, the modified PTFE hollow fiber membrane demonstrates significant potential for water treatment applications.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"722 ","pages":"Article 123920"},"PeriodicalIF":8.4,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552083","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":"One-step fabrication of porous anion exchange membranes for acid recovery breaking acid permeability–selectivity trade-off","authors":"Haiyang Shao ,&nbsp;Zhengke Tan ,&nbsp;Yafei Cheng ,&nbsp;Xiang'an Yue ,&nbsp;Lei Yuan ,&nbsp;Weixiong Jian ,&nbsp;Longqiang Xiao ,&nbsp;Xiaocheng Lin","doi":"10.1016/j.memsci.2025.123913","DOIUrl":"10.1016/j.memsci.2025.123913","url":null,"abstract":"<div><div>Diffusion dialysis (DD) presents a highly promising and cost-efficient approach for acid recovery, yet its performance is often hindered by the acid permeability of anion exchange membranes (AEMs). To address this challenge, a one-step approach has been developed to fabricate porous AEMs. Using brominated polyphenylene oxide (BPPO) as the porous base membrane, imidazole is employed for in-situ crosslinking and cationization. This approach not only retains the inherent porosity (&gt;63.5 %) of the base membrane but also achieves an exceptionally thin selective layer (&lt;0.3 μm), thereby creating abundant free space volume. Through a concurrent enhancement of ion transport sites and crosslinking density, the membrane effectively breaks acid permeability–selectivity trade-off. The optimal IPPO-20h AEM demonstrates a remarkable increase in both the acid dialysis coefficient (<span><math><mrow><msub><mi>U</mi><msup><mi>H</mi><mo>+</mo></msup></msub></mrow></math></span> = 34.1 × 10⁻³ m/h) and separation factor (<span><math><mrow><msub><mi>S</mi><mrow><msup><mi>H</mi><mo>+</mo></msup><mo>/</mo><msup><mrow><mi>F</mi><mi>e</mi></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></mrow></msub></mrow></math></span> = 573.8) in the HCl/FeCl₂ system, with enhancements of 4- and 31-fold, respectively, compared to the commercial DF120 AEM, at 25 °C. This high-performance AEM, synthesized via a straightforward and mild process, offers significant potential for large-scale acid recovery applications.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"723 ","pages":"Article 123913"},"PeriodicalIF":8.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563877","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":"Ionic covalent organic polymer (iCOP) composite membranes with enhanced efficiency for iron-chromium redox flow battery","authors":"Quan Wang ,&nbsp;Peng Song ,&nbsp;Yi Zhang ,&nbsp;Naixin Wang ,&nbsp;Quan-Fu An","doi":"10.1016/j.memsci.2025.123914","DOIUrl":"10.1016/j.memsci.2025.123914","url":null,"abstract":"<div><div>The utilization of intermittent clean energy requires high efficient energy storage technologies to minimize energy losses during charge-discharge processes. In this work, ionic covalent organic polymer (iCOP) composite membranes are presented to promote the battery efficiencies of iron-chromium redox flow battery (ICRFB). iCOP powder was synthesized by interfacial polymerization method and the resulting composite membrane possessed superior physicochemical membrane. Sulfonic acid groups in the synthesized iCOP facilitated the proton transportation of the prepared membranes. A hydrogen bond network formed between perfluorinated PEM and iCOP further promoted the proton transportation of the membrane. Meanwhile, the positively charged amino groups under acidic conditions reduced the permeation of Fe³⁺ and Cr³⁺ ions due to the Donnan effect. Specifically, proton conductivity of iCOP-8 membrane reached 215 mS cm⁻¹ at 80 °C. Moreover, iCOP-8 demonstrated the lowest permeation rates for both Fe³⁺ (1.44 × 10⁻⁷ cm s⁻¹) and Cr³⁺ (0.47 × 10⁻⁷ cm s⁻¹) among all membranes herein. In terms of the ICRFB efficiencies, a Coulombic efficiency of 97.66 % and energy efficiency of 87.11 % was achieved at a current density of 100 mA cm⁻². The battery also operated stably for over 200 cycles without significant performance degradation (CE: &gt;97.01 %, EE: &gt;86.01 %).</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"722 ","pages":"Article 123914"},"PeriodicalIF":8.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552078","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":"Fabrication of cost-effective ceramic membranes with high gas permeance for gas/solid filtration under high temperatures","authors":"Yuqi Song ,&nbsp;Shiying Ni ,&nbsp;Jinxin Liu ,&nbsp;Dong Zou ,&nbsp;Zhaoxiang Zhong ,&nbsp;Weihong Xing","doi":"10.1016/j.memsci.2025.123917","DOIUrl":"10.1016/j.memsci.2025.123917","url":null,"abstract":"<div><div>Silicon carbide (SiC) ceramic membranes with outstanding comprehensive properties offer an ideal solution for high-temperature gas/solid filtration. However, the preparation of SiC membranes involves multiple sintering steps at high temperatures. This makes the cost of preparation stay at a relatively higher level‌ that limits their further industrial applications. In this work, SiC particles with a mean size of 100 μm were used as support material and liquid sodium silicate (WG) was served as a sintering additive. Effects of the sintering additive contents and sintering temperatures on the properties of the ceramic supports were systematically investigated. In addition, the “green” bodies were prefilled by the polyvinyl butyral (PVB) solution to prevent the penetration of membrane layer particles. After drying, membrane layer dispersion was then coated on the “green” bodies using a tape-casting process to fabricate the membrane layer. The “green” membranes were finally co-sintered and the PVB was decomposed. The temperature matching properties of support and membrane layer was adjusted by using a reverse particle grading strategy, which effectively regulated the expansion rate of the membrane layer. The resulting membrane exhibited a membrane layer thickness of ∼70 μm and an average pore size of ∼2.6 μm with exceptional gas permeance of ∼212 m³·m⁻²·h⁻¹·kPa⁻¹. Additionally, the membrane demonstrated excellent thermal shock resistance at temperatures ranging from 25 °C to 800 °C. During high-temperature gas/solid filtration process (300 °C and dust particle size of ∼300 nm), these membranes obtained a remarkable dust removal efficiency of above 99.99 % and a low pressure drop of below 1.68 kPa.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"722 ","pages":"Article 123917"},"PeriodicalIF":8.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529230","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":"Thin-film nanocomposite polyamide membrane doped with imine-based covalent organic frameworks nanosphere for precise ion sieving","authors":"Yaqi Zhang ,&nbsp;Shiwei Tian ,&nbsp;Qiankun Sha ,&nbsp;Yixuan Wang ,&nbsp;Xingxiang Zhang ,&nbsp;Xuhuan Yan ,&nbsp;Na Han","doi":"10.1016/j.memsci.2025.123908","DOIUrl":"10.1016/j.memsci.2025.123908","url":null,"abstract":"<div><div>Nanomaterials have created many opportunities for the exploitation of novel thin-film nanocomposite (TFN) membranes. However, their poor compatibility at the organic-inorganic interface between the nanomaterials and the polyamide layers is still a challenge in hindering the development of TFN membranes. Herein, we firstly prepared a stable suspension of covalent organic frameworks (COFs) nanospheres as aqueous-phase nanofillers. The amino and hydroxyl groups in the COFs nanospheres form a large amount of hydrogen bonds with the piperazine molecules, the diffusion rate of the piperazine into the interface was reduced as a result, leading to the generation of thinner and more wrinkled polyamide layers. Furthermore, the exceptional dispersion characteristics of the COFs nanospheres contribute to reducing the number of defects in the resulting polyamide layer. Moreover, the intrinsic pore size of COFs provides rich channels for lowering the resistance for water molecules to transfer. These properties collectively enhanced the separation performance of the COF-doped TFN membranes, resulting in optimized COF-doped TFN membranes that exhibited a pure water permeance of up to 37.1 L‧m⁻²‧h⁻¹‧bar⁻¹, with 99.0 % and 95.9 % rejection of Na₂SO₄ and MgSO₄, respectively. Furthermore, the membrane demonstrated remarkable efficacy in the separation of mono/divalent salts and mono/divalent anions, with <span><math><mrow><msub><mi>S</mi><mrow><mi>N</mi><mi>a</mi><mi>C</mi><mi>l</mi><mo>/</mo><msub><mrow><mi>N</mi><mi>a</mi></mrow><mn>2</mn></msub><msub><mrow><mi>S</mi><mi>O</mi></mrow><mn>4</mn></msub></mrow></msub></mrow></math></span> and <span><math><mrow><msub><mi>S</mi><mrow><msup><mrow><mi>C</mi><mi>l</mi></mrow><mo>−</mo></msup><mo>/</mo><msubsup><mrow><mi>S</mi><mi>O</mi></mrow><mn>4</mn><mrow><mn>2</mn><mo>−</mo></mrow></msubsup></mrow></msub></mrow></math></span> values of 92.3 and 105.1, respectively. Additionally, the COF-doped TFN membrane exhibits consistent nanofiltration performance across a range of salt concentrations, a broad operating pressure range, and under prolonged operational conditions. Furthermore, the membrane exhibits excellent resistance to contamination. The outstanding performance of COF-doped TFN membranes paves the way for precise ion sieving in the field of water treatment, particularly in the related areas of seawater softening, brine refining, and salt mixture separation.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"722 ","pages":"Article 123908"},"PeriodicalIF":8.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519377","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":"Sub-melting-point sintering of CuO–SiC catalytic membranes for simultaneous acetone and PM2.5 control","authors":"Jiahao Chen ,&nbsp;Xinyue Deng ,&nbsp;Bin Lin ,&nbsp;Yarong Fang ,&nbsp;Yiqing Zeng ,&nbsp;Ze-Xian Low ,&nbsp;Zhaoxiang Zhong ,&nbsp;Weihong Xing","doi":"10.1016/j.memsci.2025.123898","DOIUrl":"10.1016/j.memsci.2025.123898","url":null,"abstract":"<div><div>CuO has been shown to effectively lower the sintering temperature of SiC membranes to 1040 °C through its melting flow, which promotes the rearrangement of SiC particles and significantly reduces energy consumption. However, the uncontrolled migration of molten CuO to the surface causes densification of the separation layer. Additionally, incomplete filling of the support's open pores results in the penetration of fine SiC particles, which ultimately reduces the gas permeance of the SiC catalytic membranes. Herein, we developed a sub-melting-point sintering (SMPS) method to fabricate continuous and porous CuO–SiC catalytic membranes with high gas permeance (354.90 m³ m⁻² h⁻¹ kPa⁻¹, average pore size of 5.4 μm) and significantly reduced energy consumption during sintering. The use of methyl cellulose (MC) suspension effectively fills the open pores of the CuO–SiC support, ensuring the separation layer's structural integrity while eliminating the need for an intermediate layer. Additionally, the introduction of liquid water glass (LWG) as a sintering additive allows sintering of the separation layer at 850 °C, substantially below the melting point of CuO. This suppresses the upward migration of molten CuO and further reduces overall sintering energy consumption. An acid etching approach exposes CuO nanoparticles rich in oxygen vacancies within the CuO–SiC catalytic membrane, enabling complete acetone oxidation at 240 °C and achieving a 100 % filtration efficiency for PM_2.5. This strategy effectively addresses the challenges of separation layer densification, particle penetration, and high energy requirements, offering valuable insights for the design of advanced CuO-based catalytic membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"723 ","pages":"Article 123898"},"PeriodicalIF":8.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563605","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":"Hypercrosslinked poly(oxindole biphenylene) anion exchange membranes with microporosity boosting acid/alkali recovery","authors":"Xingyun Li ,&nbsp;Jingjing Gu ,&nbsp;Ziqiang Hong ,&nbsp;Zhaoxi Shen ,&nbsp;Zheng Ji ,&nbsp;Ruonan Tan ,&nbsp;Rui Jia ,&nbsp;Jiu Yang ,&nbsp;Suixin Zhang ,&nbsp;Zongliang Wan ,&nbsp;Jin Ran ,&nbsp;Peipei Zuo","doi":"10.1016/j.memsci.2025.123910","DOIUrl":"10.1016/j.memsci.2025.123910","url":null,"abstract":"<div><div>Membrane processes are vital to acid/alkali recovery in an energy-saving and environmentally friendly way, and their performance hinges largely on the ion exchange membranes (IEMs) that are preferentially permeated by the small ions of H⁺ and OH⁻ over other larger ions. However, it remains challenging to design IEMs with both high H⁺/OH⁻ permeation rates and high ion selectivity. We here report anion exchange membranes with microporosity (HC–P3P) fabricated by a simple hypercrosslinking of side-chain type poly(oxindole biphenylene) membrane (P3P). This hypercrosslinking reaction turns linear backbones into hypercrosslinked networks and thus enhances the anti-swelling property. Benefitting from their micropore confinement imposed by micropore channels, they can efficiently separate H⁺ and OH⁻ from other larger ions. The excellent performance of acid recovery of these hypercrosslinked membranes is demonstrated by a diffusion dialysis process, with an extremely high H⁺/Fe²⁺ selectivity of 5160 (278.92 times for the commercial membrane DF-120, 7.22 times of the original P3P membrane) and a comparable H⁺ dialysis coefficient of 4.53 × 10⁻³ m h⁻¹. Besides, the HC-P3P membranes also exhibit superiority in electrodialysis base recovery, showing a very high OH⁻/WO₄²⁻ selectivity of 491.41 (41.19 times for the commercial membrane Neosepta® ACS) and a competitive OH⁻ flux of 7.14 mol m⁻² h⁻¹. Importantly, HC-P3P membranes perform much better than typically reported membranes in terms of striking an excellent balance between H⁺/OH⁻ transport rate and ion selectivity. This work suggests the great potential of hypercrosslinked IEMs for resource recovery beyond acid/alkali recovery.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"722 ","pages":"Article 123910"},"PeriodicalIF":8.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526817","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":"Amidoxime-functionalized PIM-1 incorporating defect-engineered ZIF-8 for enhanced propylene/propane separation and plasticization resistance","authors":"Hongjin Li,&nbsp;Yongchao Sun,&nbsp;Jianyu Guan,&nbsp;Lu Bai,&nbsp;Tianyou Li,&nbsp;Fake Sun,&nbsp;Yijun Liu,&nbsp;Gaohong He,&nbsp;Canghai Ma","doi":"10.1016/j.memsci.2025.123907","DOIUrl":"10.1016/j.memsci.2025.123907","url":null,"abstract":"<div><div>Mixed matrix membranes (MMMs), composed of polymers and fillers, capitalize on the complementary strengths of both materials, offering a promising approach for developing high-performance membranes for C₃H₆/C₃H₈ separation. However, the effectiveness of MMMs is often hindered by poor interfacial compatibility between the polymer and the filler. To address this challenge, we present an effective strategy that simultaneously enhances both interfacial compatibility and gas separation performance in MMMs. By etching ZIF-8 with cyanuric acid (CA), we successfully synthesized defect-engineered ZIF-8 (DZIF-8), a hollow nanoframe structure that features open metal sites. These sites not only coordinate with the amidoxime groups of amidoxime-functionalized PIM-1 (AO-PIM-1) to improve interfacial compatibility but also significantly enhance the adsorption capacity for propylene. The resulting MMMs exhibited excellent interfacial compatibility with no observable filler agglomeration. Remarkably, the 10 % DZIF-8-based MMM enhances C₃H₆ permeability to 492 and boosts C₃H₆/C₃H₈ selectivity to 24. The defect-engineered MOF-based MMM (DMMM) surpassed the 2003 upper bound for C₃H₆/C₃H₈ separation and demonstrated outstanding resistance to plasticization. Furthermore, the DMMM exceeded the 2008 Robeson upper bound for H₂/CH₄(N₂) separation performance, highlighting its exceptional versatility. These results showcase the potential of defect-engineered MMMs in gas separation applications, particularly in high-performance C₃H₆/C₃H₈ separation.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"722 ","pages":"Article 123907"},"PeriodicalIF":8.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511439","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":"Constructing dual hydroxide ion conduction channels with sulfonated hollow carbon spheres for alkaline zinc-based flow battery membrane","authors":"Shuhao Lin ,&nbsp;Xin Liu ,&nbsp;Kenan Xu ,&nbsp;Kaiwen Wang ,&nbsp;Nana Chang ,&nbsp;Yixing Wang ,&nbsp;Kang Huang ,&nbsp;Weihong Xing ,&nbsp;Zhi Xu","doi":"10.1016/j.memsci.2025.123909","DOIUrl":"10.1016/j.memsci.2025.123909","url":null,"abstract":"<div><div>Alkaline zinc-based flow batteries (AZFBs) have emerged as a promising candidate for large-scale energy storage due to their low cost and high energy density. However, the pursuit of high power density in AZFBs has been hindered by the lack of ion conductive membranes (ICMs) capable of delivering high and stable ion conduction, a challenge that has yet to be fully addressed. Herein, we designed an innovative sulfonated hollow carbon sphere (SHCS)-embedded ICM designed specifically for AZFBs. By combining a hydrophilic polymer with SHCS, the membrane achieved exceptional ion conductivity through dual ion conduction channels. The sulfonic acid groups on SHCS and the polymer side chains created interconnected water networks, enabling efficient ion transport. Additionally, hollow structure and alkali resistance of SHCS provided stable ion pathways. As a result, the proposed membrane exhibited a superior OH⁻ conductivity of 10.28 mS cm⁻¹, surpassing the pure polymer membrane (4.69 mS cm⁻¹). In AZFB tests, it achieved an 88.9 % voltage efficiency at 80 mA cm⁻² and operated for over 1570 cycles (1130 h). This work offers a breakthrough in designing high-performance ICMs, advancing high power density AZFBs for energy storage.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"722 ","pages":"Article 123909"},"PeriodicalIF":8.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519373","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":"Green fabrication of pervaporation membranes via UV-curing for polar/non-polar solvents separation","authors":"Shaobin Wen ,&nbsp;Liyuan Fan ,&nbsp;Yanqiu Wang ,&nbsp;Tianheng Wang ,&nbsp;Mengshi Chen ,&nbsp;Qiang Zhang","doi":"10.1016/j.memsci.2025.123906","DOIUrl":"10.1016/j.memsci.2025.123906","url":null,"abstract":"<div><div>A solvent-free photopolymerization method was employed to fabricate pervaporation membranes to separate polar/non-polar organic solvent mixtures. Commercially available monomers bis[2-(3,4-epoxy cyclohexyl)ethyl] tetramethyldisiloxane (TMDG) and 3,3'-(Oxybis(methylene))bis(3-ethyloxetane) (DOX), along with a photo-initiator, were mixed and spin-coated onto the PVDF membranes surface, followed by UV-curing to form polyether-polysiloxane coatings. This approach eliminates the use of organic solvents, offering a simple, efficient, and cost-effective process with significant economic and environmental benefits. Precise control over the coating structure and polarity was achieved by adjusting the monomer ratios. Among these composite membranes, M3 demonstrated excellent permeability and separation efficacy for the pervaporation of polar/non-polar mixed organic solvents. At 45 °C, the flux of M3 to acetone/n-hexane (5 wt %/95 wt %) and methanol/n-hexane (5 wt %/95 wt %) were 615 and 559 g m⁻² h⁻¹, respectively, and the separation factors were 836 and 798, respectively. Moreover, M3 also exhibited an excellent separation effect on acetone<strong>/</strong>n-hexane azeotropes (59 wt %<strong>/</strong>41 wt %, 49.8 °C), with a flux of 1806 g m⁻² h⁻¹ and a separation factor of 121. Ultimately, M3 maintained stable permeability and separation performance for acetone/n-hexane (5 wt %/95 wt %) throughout 168 h, demonstrating the outstanding chemical stability of the coating prepared by UV-curing.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"722 ","pages":"Article 123906"},"PeriodicalIF":8.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519380","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}