Journal of Membrane Science最新文献_第9页

Effect of introduced g-C3N4 nanosheet interlayers with different morphologies of ZIF-67 on CO2 separation performance

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-06 DOI: 10.1016/j.memsci.2025.123818

Yangyang Dai , Wenjun Su , Shumin Li , Suyue Zhong , Weimin Liu , Jian Li

{"title":"Effect of introduced g-C3N4 nanosheet interlayers with different morphologies of ZIF-67 on CO2 separation performance","authors":"Yangyang Dai , Wenjun Su , Shumin Li , Suyue Zhong , Weimin Liu , Jian Li","doi":"10.1016/j.memsci.2025.123818","DOIUrl":"10.1016/j.memsci.2025.123818","url":null,"abstract":"<div><div>The introduction of MOF into the interlayers of two-dimensional (2D) materials has been a promising approach for improving the membranes separation performance. However, how to select MOF with different morphologies to be introduced into the 2D membrane interlayers to precisely control the interlayer distance to enhance the CO<sub>2</sub> separation performance is still a challenge. Herein, we report a universal strategy to adjust the interlayer distance of the g-C<sub>3</sub>N<sub>4</sub> nanosheets by introducing 2D zeolitic imidazolate framework-67 nanosheets (ZIF-67 NS) and 3D bulk-type counterpart (ZIF-67 NB) between g-C<sub>3</sub>N<sub>4</sub> layers. The interlayer distances of the g-C<sub>3</sub>N<sub>4</sub> nanosheets were precisely regulated from the original 0.325 nm to 0.343 and 0.340 nm after introducing of ZIF-67 NB and ZIF-67 NS, respectively. The increase in linterlayer distances of g-C<sub>3</sub>N<sub>4</sub> nanosheet has expanded the interlayer gas transport channels, contributing to the improvement of gas permeability. Notably, compared with ZIF-67 NB, ZIF-67 NS introduced g-C<sub>3</sub>N<sub>4</sub> interlayers to prepare ZIF-67 NS@g-C<sub>3</sub>N<sub>4</sub>/Pebax membrane had superior CO<sub>2</sub> separation selectivity performance with excellent CO<sub>2</sub> permeability of 1001.96 Barrer and CO<sub>2</sub>/N<sub>2</sub> selectivity of 51.65, and CO<sub>2</sub>/CH<sub>4</sub> selectivity of 55.78 at 25 °C and 1 bar. More importantly, the introduction of g-C<sub>3</sub>N<sub>4</sub> nanosheets endowed the membrane with excellent separation stability. The study may provide valuable insights for developing novel 2D material membrane with excellent separation performance.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123818"},"PeriodicalIF":8.4,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143373095","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 throughput polyamide-hydrazide reverse osmosis membrane mediated by dynamic covalent interlayer

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-06 DOI: 10.1016/j.memsci.2025.123821

Zhongyang Wang , Siheng Zhao , Muhammad Adnan Akram , Kuo Chen , Shengchao Zhao , Lihua Zhao , Zhiyu Liu , Q. Jason Niu

{"title":"High throughput polyamide-hydrazide reverse osmosis membrane mediated by dynamic covalent interlayer","authors":"Zhongyang Wang , Siheng Zhao , Muhammad Adnan Akram , Kuo Chen , Shengchao Zhao , Lihua Zhao , Zhiyu Liu , Q. Jason Niu","doi":"10.1016/j.memsci.2025.123821","DOIUrl":"10.1016/j.memsci.2025.123821","url":null,"abstract":"<div><div>Reverse osmosis (RO) is the preferred technology for seawater and brackish water desalination. The ongoing pursuit of scientific research and industrial innovation aims to develop high-performance RO membranes. An effective approach to enhancing the performance of composite RO membranes is the use of interlayers. To simplify the construction process of the interlayer and improve its regulation effect on the interfacial polymerization process, we propose a construction scheme for an in-situ dynamic covalent interlayer. By adding glutaraldehyde (GA) to the aqueous solution containing cyclobutane tetraformylhydrazide (CBTH), we successfully synthesized a crosslinked acylhydrazone interlayer onto a polysulfone (PSF) substrate during the aqueous coating stage to optimize the interfacial polymerization process. In the early stage of interfacial polymerization, the crosslinked acylhydrazone interlayer can bind the amine monomer, preventing the initial polyamide layer from becoming too dense and creating a self-regulating mechanism. In the later stages, it continuously supplies amine monomers to the reaction zone, compensating for defects in the polyamide layer and establishing a self-perfection mechanism. The in-situ simultaneous dynamic covalent interlayer increased the permeation flux of the CBTH-TMC membrane by 3 times (4.0 L m<sup>−2</sup> h<sup>−1</sup>⋅bar<sup>−1</sup>) with NaCl rejection of 99.14 % by effectively controlling the membrane formation process. This approach demonstrates advantages in simplicity and operability, successfully overcoming the \"trade-off\" limitation of original polyamide-hydrazide membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123821"},"PeriodicalIF":8.4,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143373094","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

Highly loaded Prussian blue mixed matrix membrane for salt-tolerant solar catalytic oxidation

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-05 DOI: 10.1016/j.memsci.2025.123820

Guiliang Li , Yang Liu , Ke Shi , Shenghua Zhou , Fu Liu

{"title":"Highly loaded Prussian blue mixed matrix membrane for salt-tolerant solar catalytic oxidation","authors":"Guiliang Li , Yang Liu , Ke Shi , Shenghua Zhou , Fu Liu","doi":"10.1016/j.memsci.2025.123820","DOIUrl":"10.1016/j.memsci.2025.123820","url":null,"abstract":"<div><div>Dispersing metal-organic framework (MOF) fillers within matrix polymeric membranes is essential for enhancing their availability, processability, and performance, yet hampered by serious agglomeration. Herein, we synthesize a novel Prussian Blue mixed matrix membrane for solar catalytic oxidation. Micro-scaled Prussian Blue microspheres are coated with Polyvinyl pyrrolidone-Vinyltriethoxysilane (PVP-VTES) crosslinked network to enhance the dispersed stability in the organic solution. The loading of modified Prussian Blue (mPB) fillers in Polyvinylidene fluoride (PVDF) matrix membrane could reach 40 %. The PB mixed matrix membrane shows enhanced hydrophilicity, water permeance, and excellent photothermal conversion capability. The membrane exhibits a sustainable tetracycline (TC) removal (>96 %) under solar irradiation in the presence of high salinity (e.g. NaCl, NaAC, and NaHCO<sub>3</sub>). The photothermal effect facilitates peroxymonosulfate activation for reactive oxygen species efficient generation (<sup>1</sup>O<sub>2</sub>/•OH/SO<sub>4</sub><sup>•-</sup>), resulting in instantaneous catalytic removal rate, multi-salt tolerance, and sustainable pollutants removal. The reported technique could potentially address interface challenges in mixed matrix membranes and can be extrapolated to the development of other fillers, achieving superior performance in membranes for water remediation.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123820"},"PeriodicalIF":8.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377188","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

Enhancing antifouling properties of polyamide-based thin-film composite membranes using oxidized polyquaternium-10 via schiff base grafting

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-04 DOI: 10.1016/j.memsci.2025.123817

Yiwen Xu , Yixian Xing , Hongwei Lu , Doufeng Wu , Hai Huang , Sanchuan Yu , Congjie Gao

{"title":"Enhancing antifouling properties of polyamide-based thin-film composite membranes using oxidized polyquaternium-10 via schiff base grafting","authors":"Yiwen Xu , Yixian Xing , Hongwei Lu , Doufeng Wu , Hai Huang , Sanchuan Yu , Congjie Gao","doi":"10.1016/j.memsci.2025.123817","DOIUrl":"10.1016/j.memsci.2025.123817","url":null,"abstract":"<div><div>Addressing the urgent global challenge of water scarcity underscores the critical importance of enhancing polyamide (PA) reverse osmosis (RO) membranes, which are essential for efficient water purification. This study introduces a novel approach by utilizing oxidized polyquaternium-10 (OPQ-10), a hydrophilic and positively charged aldehyde-based cellulose derivative, grafted onto the PA membrane surface through Schiff base reactions. This method specifically targets amino groups to significantly enhance fouling resistance, leading to improved performance against contaminants such as bovine serum albumin (BSA), sodium alginate (SA), and dodecyl trimethyl ammonium bromide (DTAB). Noteworthy advancements include a marked increase in hydrophilicity and surface smoothness, alongside significant improvements in surface charge properties. Specifically, water contact angle decreased dramatically from 64.5° to 36.9°, root mean square roughness reduced from 118.0 nm to 99.7 nm, and the isoelectric point shifted from pH 4.95 to 7.19. These modifications not only bolster the antifouling capabilities of the membranes but also significantly enhance membrane durability under extreme pH conditions. Moreover, without substantial reductions in flux, the sodium chloride (NaCl) rejection improved from 96.6 % to 98.4 %, and it maintained consistent rejection and flux throughout a 300-h long-term performance test. The findings highlight the pivotal role of surface chemistry modifications in extending the functional lifespan of PA membranes and provide robust guidelines for their application in industrial settings, offering a sustainable solution to meet the escalating demands for clean water.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123817"},"PeriodicalIF":8.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350153","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

Fine-tuning polyamide membrane pores and charge for enhanced Li+/Mg2+ separation

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-04 DOI: 10.1016/j.memsci.2025.123812

Yufei Yan , Jin Wang , Wubin Wang , Chao Han

{"title":"Fine-tuning polyamide membrane pores and charge for enhanced Li+/Mg2+ separation","authors":"Yufei Yan , Jin Wang , Wubin Wang , Chao Han","doi":"10.1016/j.memsci.2025.123812","DOIUrl":"10.1016/j.memsci.2025.123812","url":null,"abstract":"<div><div>Positively charged polyethyleneimine (PEI) nanofiltration (NF) membranes exhibit great potential for Li<sup>+</sup>/Mg<sup>2+</sup> separation. However, the dense nature of the polyamide (PA) layer presents a challenge in breaking through the permeance bottleneck, significantly hindering its further application. In this study, 1-(2-aminoethyl)piperazine (AEP) was first incorporated into the PEI solution as a structural regulator to adjust the microstructure of the PA separation layer. The structure of the PA selective layer was fine-tuned with the incorporation of AEP, enlarging the spacing between the long-chain molecules of PEI, and established hydrogen bonding interactions with PEI. This led to the generation of Turing structures on the membrane surface, which enhanced permeance. Meanwhile, the primary amine groups in AEP were protonated in water, aiding in boosting positive membrane charge and subsequently elevating its rejection capability for divalent cations. The ingenious combination of large molecule PEI and small molecule AEP served a dual purpose in promoting the membrane construction and performance. The optimized PEI/AEP-TMC NF membrane exhibited high pure water permeance (11.24 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup>) and excellent Li<sup>+</sup>/Mg<sup>2+</sup> selectivity (<em>S</em><sub><em>Li, Mg</em></sub> = 24.59), while also achieving higher Li purity and Li recovery. Insights into the remarkable performance of the modified membranes were gained through the transition state theory. Additionally, the internal stress generated in the NF process was determined by utilizing the principles of thin plate theory, revealing that the NF membrane possesses good pressure resistance and maintains stable operation at pressures up to 9 bar. This study demonstrates the capability of PEI/AEP-TMC NF membranes for Li<sup>+</sup>/Mg<sup>2+</sup> separation and offers a novel aqueous phase monomer for the preparation of NF membranes specifically for Li<sup>+</sup>/Mg<sup>2+</sup> separation.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123812"},"PeriodicalIF":8.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143373030","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

Mass transport mechanisms insights of selective sodium/magnesium separation through nanofiltration membranes

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-04 DOI: 10.1016/j.memsci.2025.123808

Nicolás Cevallos-Cueva , Md. Mushfequr Rahman , Hluf Hailu Kinfu , Volker Abetz

{"title":"Mass transport mechanisms insights of selective sodium/magnesium separation through nanofiltration membranes","authors":"Nicolás Cevallos-Cueva , Md. Mushfequr Rahman , Hluf Hailu Kinfu , Volker Abetz","doi":"10.1016/j.memsci.2025.123808","DOIUrl":"10.1016/j.memsci.2025.123808","url":null,"abstract":"<div><div>This study investigates the selective ion separation capabilities of interfacially polymerized nanofiltration (NF) membranes, focusing on the effect of piperazine (PIP) and trimesoyl chloride (TMC) concentrations on Na<sup>+</sup>/Mg<sup>2+</sup> selectivity. By varying the concentrations of PIP and TMC during interfacial polymerization (IP), we altered the membranes’ physicochemical characteristics and assessed their performance. The Donnan Steric Pore Model with Dielectric Exclusion (DSPM-DE) was used to explore the correlations between the DSPM-DE input parameters and the partitioning mechanisms and transmembrane fluxes of Na<sup>+</sup> and Mg<sup>2+</sup> in terms of the monomer concentrations. Our findings reveal that variations in the thickness-to-porosity ratio and the effective membrane charge density, influenced by higher PIP and lower TMC concentrations, enhance the Na<sup>+</sup>/Mg<sup>2+</sup> separation capabilities of the membranes. This study provides a mechanistic understanding of selective Na<sup>+</sup>/Mg<sup>2+</sup> separation in terms of PIP and TMC concentrations, elucidating the underlying transport and exclusion mechanisms. These insights are important for optimizing membrane fabrication by IP and designing NF membranes for efficient Na<sup>+</sup>/Mg<sup>2+</sup> separation, which is essential due to the importance of magnesium as a critical raw material.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123808"},"PeriodicalIF":8.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Easy switching of selective vapor permeation by tuning the surface free energy of graphene oxide membranes

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-04 DOI: 10.1016/j.memsci.2025.123816

Choonsoo Kim, Byeongho Lee

{"title":"Easy switching of selective vapor permeation by tuning the surface free energy of graphene oxide membranes","authors":"Choonsoo Kim, Byeongho Lee","doi":"10.1016/j.memsci.2025.123816","DOIUrl":"10.1016/j.memsci.2025.123816","url":null,"abstract":"<div><div>Membrane-based separation for the dehydration and purification of organic chemicals, referred to as pervaporation and vapor permeation, has been widely studied as a feasible alternative to traditional distillation. Graphene oxide (GO) laminates or membranes have attracted great interest for the dehydration of chemicals as they allow selective water permeation owing to their hydrophilic nature. In this study, we effectively tuned the permeation selectivity of GO membranes by adjusting their surface free energy via simple dry treatments and explore its mechanism on the permeation of binary vapor, represented by the collaborative permeation and hindering effect. Oxygen (O<sub>2</sub>) plasma treatment rendered the membrane surface superhydrophilic, thereby enhancing selective water permeation from water–alcohol binary vapors. The corresponding hydrophilic membrane exhibited greater water flux and separation factor than the unmodified membrane. On the other hand, XeF<sub>2</sub> gas treatment changed the surface characteristic of the GO membrane from hydrophilic to hydrophobic, altering its permeation selectivity from water to alcohol. These findings demonstrate that the surface modification of GO membranes via dry treatment methods is highly effective for switching the selectivity of the membrane to water or organic solvents/vapors. In water-alcohol binary vapor permeation through a GO membrane, water and alcohol molecules interact, promoting collaborative permeation explained by their solubility parameters. This interaction allows minimal alcohol permeation with water, The hindering effect cause alcohol to slow down water transport, altering the slip length of water. During water transport through GO membranes, ballistic water transport was observed when the slip length of water reached ∼100 nm.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123816"},"PeriodicalIF":8.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350197","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

Toward tailored anion exchange membranes for high-performance electrocatalytic oxidation of HMF to FDCA

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-04 DOI: 10.1016/j.memsci.2025.123810

Xuehui Ge , Jun Qian , Zhen Zhu , Yafei Cheng , Lei Yuan , Jinjie Jia , Xiaolei Liu , Hongwei Zhang , Xiaocheng Lin

{"title":"Toward tailored anion exchange membranes for high-performance electrocatalytic oxidation of HMF to FDCA","authors":"Xuehui Ge , Jun Qian , Zhen Zhu , Yafei Cheng , Lei Yuan , Jinjie Jia , Xiaolei Liu , Hongwei Zhang , Xiaocheng Lin","doi":"10.1016/j.memsci.2025.123810","DOIUrl":"10.1016/j.memsci.2025.123810","url":null,"abstract":"<div><div>Membrane separator that is highly ionic conductive and alkaline stable is essential for the efficient, scalable electrocatalytic oxidation of HMF to FDCA, a key process for sustainable development. Drawing inspiration from the microstructural design of Nafion, we developed a series of side-chain imidazolium-functionalized anion exchange membranes (AEMs), employing the chemically stable polyethersulfone (PES) as the base polymer. Functionalization of PES side chains with chloromethyl groups, followed by C2-substituted imidazolium modification, enabled precise tuning of the membrane's physicochemical properties and structural characteristics. This tailored approach yielded an optimized DIM-PES-1.0 AEM exhibiting complete HMF conversion, with 94.0 % selectivity for FDCA and 94.1 % Faradaic efficiency, outperforming the commercial Fumasep FAA-3-PK-130 AEM, which achieved only 85.5 % FDCA selectivity under similar conditions. Notably, the DIM-PES-1.0 AEM demonstrated high alkaline stability, substantially retaining its electrocatalytic activity across 15 cycles, in contrast to the rapid degradation observed in FAA-3-PK-130 AEM after only three cycles. Our findings showcase a scalable, efficient strategy for producing high-performance AEMs under mild conditions, highlighting their potential for advancing sustainable electrocatalytic processes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123810"},"PeriodicalIF":8.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387990","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

Enhanced H2S and CO2 selectivities through bromo-substitution of polyimide membranes for sour natural gas upgrading

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-03 DOI: 10.1016/j.memsci.2025.123807

Ali Hayek , Abdulkarim Alsamah , Qasim Saleem , Rashed H. Alhajry , Abdulrahman A. Alsuwailem

{"title":"Enhanced H2S and CO2 selectivities through bromo-substitution of polyimide membranes for sour natural gas upgrading","authors":"Ali Hayek , Abdulkarim Alsamah , Qasim Saleem , Rashed H. Alhajry , Abdulrahman A. Alsuwailem","doi":"10.1016/j.memsci.2025.123807","DOIUrl":"10.1016/j.memsci.2025.123807","url":null,"abstract":"<div><div>Hydrogen sulfide (H<sub>2</sub>S) removal from sour natural gas streams <em>via</em> polymeric membranes is a challenging process. Membranes are prone to H<sub>2</sub>S-induced plasticization at high gas feed pressures which reduces their separation properties (<em>i.e.</em>, H<sub>2</sub>S/CH<sub>4</sub> selectivity). In this work, we report the preparation of CARDO(Br)-containing polyimides that form membranes with increased polarity due to the presence of bromo groups in their backbones. Gas separation performance was evaluated of membranes prepared from 6FDA-Durene/CARDO(Br) (1:1) copolyimide using a quinary gas mixture containing ∼20 mol.% H<sub>2</sub>S at a high gas feed pressure of 500 psia. Such conditions are of great importance to assess polymeric membrane performance since they mimic those encountered in industrial sour natural gas purification. The presence of the bromo groups [6FDA-Durene/CARDO(Br) (1:1) copolyimide] improved H<sub>2</sub>S/CH<sub>4</sub> and CO<sub>2</sub>/CH<sub>4</sub> selectivity coefficients by 42 % and 49 %, respectively, compared to its non-brominated [6FDA-Durene/CARDO (1:1)] copolyimide, while maintaining high H<sub>2</sub>S and CO<sub>2</sub> permeability coefficients. The findings from this work avail polymeric membranes with attractive performance for implementation in membrane-based sour natural gas upgrading applications.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"721 ","pages":"Article 123807"},"PeriodicalIF":8.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350198","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

ZIF-8/graphene nanoribbon hybrid nanoplates for mixed-matrix membranes with enhanced CO2 separation performance

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2025-02-03 DOI: 10.1016/j.memsci.2025.123805

Ji Hoon Kim , Soon Hyeong So , Minsu Kim , Eunji Choi , Nahyeong Lee , Kiwon Eum , Yun Ho Kim , Dae Woo Kim

{"title":"ZIF-8/graphene nanoribbon hybrid nanoplates for mixed-matrix membranes with enhanced CO2 separation performance","authors":"Ji Hoon Kim , Soon Hyeong So , Minsu Kim , Eunji Choi , Nahyeong Lee , Kiwon Eum , Yun Ho Kim , Dae Woo Kim","doi":"10.1016/j.memsci.2025.123805","DOIUrl":"10.1016/j.memsci.2025.123805","url":null,"abstract":"<div><div>Pore-tuned metal-organic frameworks (MOFs) have been extensively utilized for the development of mixed matrix membranes (MMMs). In this study, we synthesized a ZIF-8/graphene oxide nanoribbon (GONR) hybrid nanoplate and incorporated it into 6FDA-DAM-type polyimide polymers. The process began with the shear-induced assembly of graphene oxide nanoribbons (GONRs) into high-aspect-ratio nanosheets by extruding GONR dispersions through a micro-gap channel. During the subsequent solvothermal synthesis of ZIF-8, ZIF-8 nanoparticles were grown and densely intergrown within the GONR nanosheets, resulting in hybrid nanoplates with a thickness of several hundred nanometers. The resulting MMMs, containing 5 wt% of the ZIF-8/GONR hybrid filler, exhibited significantly enhanced CO₂ separation performance. They achieved a CO₂ permeability of 639 Barrer, with ideal selectivities of 19.3 for CO₂/N₂ and 31 for CO₂/CH₄. Unlike conventional ZIF-8-based MMMs showing limited improvement in CO₂ separation due to the larger and flexible aperture size (∼4 Å) of ZIF-8, the enhanced CO₂ selectivity is attributed to the GONR-induced pore tuning of ZIF-8. This tuning effectively narrows the aperture size, hindering the permeation of larger molecules and improving CO₂ selective permeation.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"720 ","pages":"Article 123805"},"PeriodicalIF":8.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181631","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