Prepared Hybrid Membranes Research Articles

Enhanced ethanol dehydration performance of cationic COFs filled anionic alginate hybrid membranes

Adding charged fillers to incorporate long-range electrostatic interactions is an effective way to reduce structure defects and improve separation performance of polyelectrolyte membranes. In this study, three cationic covalent organic frameworks (COFs), TpEB, TpTGCl, and TpPy, were incorporated into anionic alginate to prepare hybrid membranes for pervaporation dehydration of ethanol. With the increase of electrostatic interaction, the decrease in the mobility of polymer chains leads to an increase in the crystallinity and selectivity. Meanwhile, the inherent hydrophilic channels of iCOFs provided additional mass transfer channels, increasing the membrane permeability. When separating a 90 wt% ethanol/water mixture at 76 °C, the hybrid membrane containing 15 wt% TpEB exhibited the highest separation performance with a permeation flux of 2460 g m-2 h-1 and a separation factor of 2110, and it also demonstrated ideal long-term stability. This work provides a new perspective for the selection of fillers in the design process of hybrid membranes in the future.

Lithium-Ion-Sieve-Embedded Hybrid Membranes for Anion-Exchange- and Cation-Concentration-Driven Li/Mg Separation.

There is an urgent need to develop efficient and environmentally friendly technologies for separating Li+ from brines containing abundant Mg2+ to meet the growing demand for lithium resources. In this work, we prepared hybrid membranes by integrating hydrogen manganese oxide (HMO), a lithium-ion sieve, as a filler into anion-exchange membranes (AEMs), the quaternary ammonium-functionalized poly(2,6-dimethyl-1,4-phenylene oxide) (QPPO) and poly(m-terphenyl piperidinium) (m-PTP). Cations are transported by electrostatic attraction originating from anions and the concentration difference across membranes. Because of the effects of electrostatic repulsion of the fixed cationic groups and steric resistance in AEMs, Li+ with less charge and smaller radius will preferentially pass through the membrane. In addition, the presence of HMO provides an additional fast transport channel for Li+, resulting in an enhanced Li+/Mg2+ separation performance. The results show that 20%HMO@m-PTP exhibits high Li+ flux (0.48 mol/m2·h) and Li+/Mg2+ selectivity (βLi+/Mg2+ = 14.1). Molecular dynamics simulations show that m-PTP has more free volume than QPPO, which is beneficial for rapid cation transport. Spectral analysis confirms the insertion and sieving of Li+ in HMO. This work illustrates the great potential of anion-exchange- and cation-concentration-driven hybrid membranes based on lithium-ion sieves for low-energy and efficient Li+ extraction processes.

Graphene oxide/hydrotalcite modified polyethersulfone nanohybrid membrane for the treatment of lead ion from battery industrial effluent

In the present study, polyethersulfone based nanohybrid membranes were effectively fabricated by incorporating graphene oxide (GO) and hydrotalcite (HT) nanosheets into the membrane structure. HT was prepared to overcome the irreversible agglomeration behavior of GO at a high concentration which affects the performance of the membranes. In particular, the shedding of HT in formamide provides a two-dimensional nanosheet with a higher positive charge density to prevent the restacking of GO nanosheets. Here, exfoliated GO and HT with different combinations (1:1, 1:2 and 1:3) were infused in the membrane matrix to treat lead-acid battery effluent effectively. Finally, the hybrid membranes were characterized for hydrophilicity, mechanical strength and pure water flux. In combination with the superior properties of GO and HT, the prepared hybrid membranes can be used as effectively to improve the separation and permeation performance. The phase inversion process eliminated the leaching of nanoparticles from the membrane matrix. The reusability of the hybrid membrane was achieved using 0.1 mol⋅L−1 NaOH solution and reused without significant reduction in lead removal efficiency. The cost analysis of the membrane was also estimated from the lab study. Therefore, the present study suggested the selective and sustainable treatment of lead from a real-life effluent.

Effect of ZIF-7 doping content on H2/CO2 separation performance of 1,2-bis(triethoxysilyl)ethane-derived organosilica membranes

Organosilica membranes with good hydrothermal stability are promising for pre-combustion capture, but the trade-off effect still constrains their gas separation performance. Herein, we prepared hybrid membranes by incorporating ZIF-7 nanoparticles into 1, 2-bis(triethoxysilyl)ethane (BTESE) networks to improve the H2/CO2 permselectivity by the intrinsic properties of nanoparticles. The effect of inorganic fillers was investigated by adjusting the doping content of ZIF-7 nanoparticles. We found that the H2 permeance of hybrid membranes remained at ∼10−6 mol·m−2·s−1·Pa−1, while the H2/CO2 permselectivity decreased with increasing nanoparticle doping content. The E-ZIF-7-0.4 hybrid membrane showed H2 permeance of 1.2 × 10−6 mol·m−2·s−1·Pa−1 and H2/CO2 permselectivity of 21.7. Our results may offer valuable insights into preparing hybrid membranes with optimal nanoparticle doping content.

Sulfonated poly (ether ketone sulfone) composite membranes containing ZIF-67 coordinate graphene oxide showing high proton conductivity and improved physicochemical properties

In this study, a sulfonated poly (ether ketone sulfone) with multiple sulfonic acid groups was prepared and named as MSP, where the multiple sulfonic acid groups in the polymer were located on its side chains of uneven length. And a series of hybrid membranes were prepared by introducing organic–inorganic fillers (ZIF-67/GO) into this side chain type polymer matrix. Among them, ZIF-67 was chemically grafted onto the GO sheet through coordination between Co+ and the carboxyl group of GO, bound to GO and grown uniformly. The ZIF-67/GO and hybrid membranes were characterized by FT-IR, XRD, SEM, AFM and 1H NMR. The hybrid membranes exhibited increasingly high proton conductivity from MSP (0.0876 S cm−1) to MSP-1 % ZIF-67/GO (0.1426 S cm−1) at 100 °C and 100 % relative humidity. Moreover, the hybrid membranes have excellent chemical stability. The results indicated that ZIF-67/GO was important for constructing of proton transport channels, and the prepared hybrid membranes showed great potential for application in PEM.

Biomineralization-mimetic growth of ultrahigh-load metal-organic frameworks on inert glass fibers to prepare hybrid membranes for collecting organic hazards in unconventional environment

• Pristine and ultrahigh-load metal-organic frameworks on inert glass fibers. • Hybrid membranes to collect organic hazardous substances in unconventional environs. • Presented ultrahigh-adsorption abilities to substances that included dyes and antibiotics. • Extraordinary robustness to high temperature, organic solvent, extreme alkaline solution. • Suitable for difficult environments, satisfactory recycling, and long-term operation abilities. Exploring new membrane matrices with demanding functions but inert surficial properties to prepare hybrid membranes is challenging. Inspired by biomineralization, we proposed a strategy to grow pristine and ultrahigh-load metal-organic frameworks (MOFs) on inert glass fibers (GF) to prepare GF@MOFs (ZIF-8) hybrid membranes to efficiently collect organic hazardous substance in conventional and unconventional solutions. Comparing with the poor coverage of the MOFs using the conventional method, this new method induced an ultra-high load of MOFs, and even interesting intergrown-particle-, sheet-flower-, and grain-like shapes. The GF@ZIFs exhibited adsorbability of malachite green up to 3964.8 mg g −1 , whereas that of the reported analogues only reached 1667 mg g −1 . The hybrid membranes also exhibited adsorption capability of 192.2 mg g −1 to tetracycline. More importantly, having benefited from the introduction of robust GF matrices, the robustness of the GF@ZIFs was significantly enhanced: synergetic effect derived from the GF and MOFs could be observed. Furthermore, all three types of GF@ZIFs presented well-maintained performance in 70-°C hot water, chloroform, and pH 14 NaOH solution, which are generally nonadoptive to conventional hybrid membranes. The GF@ZIF membranes were further developed as a filter device for rapid collection of over 95% malachite green (50 mg L −1 , 10 mL) in 1 h. The proposed method could create a new direction for exploring new types of matrices to fabricate hybrid materials.

Enhanced proton conductivity of sulfonated poly(arylene ether ketone sulfone) polymers by incorporating phosphotungstic acid-ionic-liquid-functionalized metal-organic framework

In this work, the MIL-100(Fe) was selected as blank-sample. Using one-pot method, phosphotungstic acids were encapsulated in the blank-sample to prepare HPW@MIL-100(Fe). Then, the ionic liquid ([EMIM][N(Tf)2]) was chosen to modify the HPW@MIL-100(Fe). And the phosphotungstic acid-ionic-liquid (HPW-ILs) modified MIL-100(Fe) (HPW-ILs@MIL-100(Fe)) was obtained. The final product was introduced into polymer matrixes (C-SPAEKS) to prepare hybrid membranes. The structures and morphologies of MOFs and membranes were characterized by field emission scanning electron microscope (FTSEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). This series of membranes exhibited increasing proton conductivities from 0.043 S cm−1 of C-SPAEKS to 0.138 S cm−1 of HPW-ILs@MOF-4 at 100 °C and 100% relative humidity. Furthermore, these hybrid membranes have enhanced mechanical properties and dimensional stabilities. Obviously, the HPW-ILs@MIL-100(Fe) had a beneficial function on improving the performance of PEMs and showed great potential in PEMs applications.

Multiple Amine-Contained POSS-Functionalized Organosilica Membranes for Gas Separation.

A new polyhedral oligomeric silsesquioxane (POSS) designed with eight –(CH2)3–NH–(CH2)2–NH2 groups (PNEN) at its apexes was used as nanocomposite uploading into 1,2-bis(triethoxysilyl)ethane (BTESE)-derived organosilica to prepare mixed matrix membranes (MMMs) for gas separation. The mixtures of BTESE-PNEN were uniform with particle size of around 31 nm, which is larger than that of pure BTESE sols. The characterization of thermogravimetric (TG) and gas permeance indicates good thermal stability. A similar amine-contained material of 3-aminopropyltriethoxysilane (APTES) was doped into BTESE to prepare hybrid membranes through a copolymerized strategy as comparison. The pore size of the BTESE-PNEN membrane evaluated through a modified gas-translation model was larger than that of the BTESE-APTES hybrid membrane at the same concentration of additions, which resulted in different separation performance. The low values of Ep(CO2)-Ep(N2) and Ep(N2) for the BTESE-PNEN membrane at a low concentration of PNEN were close to those of copolymerized BTESE-APTES-related hybrid membranes, which illustrates a potential CO2 separation performance by using a mixed matrix membrane strategy with multiple amine POSS as particles.

High-Performance, Free-Standing Symmetric Hybrid Membranes for Osmotic Separation.

The internal concentration polarization (ICP) of asymmetric osmotic membranes with support layers greatly reduced membrane water permeability, therefore compromising membrane performance. In this study, a series of free-standing symmetric hybrid forward osmosis (FO) membranes without experiencing ICP were fabricated by covalently linking metal-organic framework (MOF) nanofillers with a polymer matrix. Owing to the introduction of MOFs, which allow only water permeation but reject salts by steric hindrance, the prepared hybrid membranes could approach the empirical permeability-selectivity trade-off. The optimized hybrid membrane displayed an outstanding water/Na2SO4 selectivity of ∼1208.4 L mol-1, compared with that of conventional membranes of ∼375.6 L mol-1. Additionally, the fabricated hybrid membranes showed excellent mechanical robustness, maintaining structural integrity during the long-term FO separation of high-salinity solution. This work provides an effective methodology to fabricate high-performance, symmetric MOF-based membranes for osmotic separation processes such as seawater desalination and water purification.

Polyethersulfone hybrid ultrafiltration membranes fabricated with polydopamine modified ZnFe2O4 nanocomposites: Applications in humic acid removal and oil/water emulsion separation

This study explored the impact of eco-friendly polydopamine (PDA) coated ZnFe2O4 nanocomposites (PDA@ZnFe2O4 NCs) as nanofillers to fabricate a new class of polyethersulfone (PES) hybrid ultrafiltration (UF) membranes for wastewater treatment applications. The hybrid UF membrane was prepared by incorporating PDA@ZnFe2O4 NCs into PES via the non-solvent induced phase separation (NIPS) process. The PDA@ZnFe2O4 NC was characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Additionally, the morphology and performance of the prepared hybrid membranes were characterized by SEM, contact angle, surface charge, and thermogravimetric analysis (TGA). The incorporation of PDA@ZnFe2O4 NC into the PES membrane affects the porosity, mean pore radius, hydrophilicity, and thermal stability of the developed hybrid membranes. The pure water flux of the PES hybrid membrane with 4 wt% PDA@ZnFe2O4 reached ∼687 L/m2 h, which is about 188% higher than that of the pristine PES membrane. The performance of the PES/ PDA@ZnFe2O4ultrafiltration hybrid membrane was also investigated using humic acid (HA) foulant and oil/water emulsion individually. Compared to the pristine PES and PES/ZnFe2O4 membranes, the developed hybrid membranes showed enhanced permeability and HA foulant removal. HA's removal efficiency has improved from ∼65% in the pristine PES membrane to ∼94% in the 4 wt% PDA@ZnFe2O4 hybrid membrane. The abundant functional groups on the PDA@ZnFe2O4 NC surface also enhanced the separation of the oil/water emulsion (96%). In both the HA and oil/water emulsion separation tests, the flux recovery ratio (FRR) and reversible fouling ratio (Rr) were also significantly improved, suggesting that the PES/PDA@ZnFe2O4 membrane was a very promising candidate for HA removal and treatment of oily wastewater.

Enhancing properties of poly(2,6-dimethyl-1,4-phenylene oxide)-based anion exchange membranes with 5-mercaptotetrazole modified graphene oxides

Anion exchange membranes (AEMs) with high conductivity and superior stability against the attack from the strong alkali working medium are highly needed. The graphene oxide (GO) having the lamellar structure of about 1.5 nm in thickness was first modified with 1-(2-(dimethylamino)ethyl)-1H-tetrazole-5-thiol and followed by quaternization of the 2-(dimethylamino)ethyl group with (5-bromopentyl) trimethylammonium bromide. The quaternized graphene oxide (QGO) was doped into quaternized poly(2,6-dimethyl-1,4-phenylene oxide) (QPPO) to fabricate the AEMs with comprehensive properties. The introduced QGO obviously changed the microphase structure of the membranes with more ion clusters for ion conduction according to the images taken by atomic force microscope. The prepared membrane doping with 0.25 wt% QGO reached a hydroxide conductivity of 75 mS cm−1 at 80 °C. Moreover, the prepared hybrid membranes exhibited improved alkaline stability, enhanced Young’s modulus of more than 600 MPa, and low methanol permeability in the 10−7 cm2 s−1 order of magnitude compared to the pristine QPPO membrane. Working as the radical scavenger, the introduced QGO endowed the hybrid membrane with conductivity retaining rate of about 84% after immersed in 2 M KOH solution at 60 °C for 360 h, while the pristine QPPO membrane retained its original conductivity of 56%.

Effects of phenylenediamines and alkoxysilanes on gas transport properties of polyimide ‐ silica hybrid membranes

AbstractGas transport properties of polyimides (PIs) and their silica hybrids were investigated. The PIs synthesized with several methyl‐substituted phenylenediamines were hybridized with silica via a sol–gel process with different alkoxysilanes. The prepared hybrid membranes showed controlled gas permselectivity, depending on the selected phenylenediamines and alkoxysilanes. It was worth noting that the hybrids prepared with tetraethoxysilane possessed improved CO2 permselectivity with increasing silica content, which tended to exceed the upper‐bound trade‐off line. This fact suggested the additional formation of free volume holes especially favorable for the CO2/CH4 separation around the polymer/silica interfacial area.

Synthesis and characterization of heteropolyacid (H3PW12O40) embedded poly (vinyl alcohol)-g-acrylamide copolymeric membranes and their evaluation for proton exchange membrane fuel cells

The present study reports the synthesis of poly(vinyl alcohol)-g-acrylamide (PVA-g-AAm) copolymer by grafting in presence of benzoyl peroxide initiator via free radical polymerization. The crosslinking was donein-situ bythe addition of glutaraldehyde. The membranes were prepared by solution casting and solvent evaporation technique. The different amounts of heteropolyacid i.e Phosphotungstic acid hydrate (H3PW12O40) (HPA) was incorporated into the PVA-g-AAm membranes. The membranes were sulfonated by soaking in the solvent bath. The prepared membranes were characterized by FTIR to confirm the formation of the copolymer. The surface morphology is studied using SEM. The water uptake test, contact angle measurement, and ion exchange capacity were conducted to measure the physical properties of the prepared hybrid membranes. The modified membranes showed good proton conductivity at 50 °C around 10−2 Scm−1 and lower H2 permeability as compared to standard Nafion 115 membrane. The membrane containing 10 wt. % HPA PVA-g-AAm sulfonated membranes performed better with 0.578 Scm−1 as compared to plain PVA-g-AAm sulfonated membrane which shows the conductivity 0.248 Scm−1 under fuel cell atmosphere. The obtained results suggested that the incorporation of HPA into the proton-conducting copolymers is a good candidate for elevated temperature operation of proton exchange membrane fuel cells. Application to operate fuel cells at elevated temperatures is now being investigated.

High-Performance TiO₂ Nanotubes/Poly(aryl ether sulfone) Hybrid Self-Cleaning Anti-Fouling Ultrafiltration Membranes.

A series of novel self-cleaning hybrid photocatalytic ultrafiltration (UF) membranes were fabricated to separate polyacrylamide, which is widely used as a commercial flocculant. To maximize the self-cleaning and anti-fouling properties of hybrid membranes, high surface area TiO2 nanotubes (TNTs) with excellent photocatalytic activity were homogeneously introduced into a poly(aryl ether sulfone) matrix by chemical bonds. The chemical structure, micromorphology, hydrophilicity, separation efficiency, fouling behavior, and self-cleaning property of the prepared hybrid membranes were well characterized and evaluated. For the optimal sample, the flux recovery ratio increased from ~40% to ~80% after simulated sunlight irradiation for 20 min, which was attributable to the homogeneous dispersion and efficient photocatalytic degradation ability of TNTs. Furthermore, the intelligent fabrication strategy enhanced the anti-aging ability of the hybrid membranes via the use of a fluorine-containing poly matrix. This work provided new insight into the fabrication of high-performance self-cleaning inorganic/organic hybrid membranes.

Development of a high‐performance polysulfone hybrid ultrafiltration membrane using hydrophilic polymer‐functionalized mesoporous SBA − 15 as filler

ABSTRACTA novel polysulfone hybrid ultrafiltration membrane was developed by blending hydrophilic poly[poly(ethylene glycol) methyl ether methacrylate] [P(PEGMA)] grafted mesoporous SBA‐15 [SBA‐g‐P(PEGMA)] as filler. The hydrophilic SBA‐g‐P(PEGMA) fillers were synthesized via surface‐initiated atom transfer radical polymerization. The effects of the SBA‐g‐P(PEGMA) fillers on the prepared hybrid membranes were systematically investigated. Compared with pristine SBA‐15 fillers, SBA‐g‐P(PEGMA) fillers contributed to higher hydrophilicity and a more developed pore structure in the hybrid membranes. Specifically, SBA‐15 grafted with a moderate P(PEGMA) molecular weight could better preserve the valid open‐ended filler pore structure in the membrane matrix, thus facilitating membrane permeability. The pure water flux of the as‐prepared polysulfone (PSF)/SBA‐g‐P(PEGMA) membrane was three times that of the PSF/SBA‐15 membrane (271.7 L m−2 h−1 vs. 88.2 L m−2 h−1) with similar membrane selectivity. Moreover, the PSF/SBA‐g‐P(PEGMA) membranes showed improved antifouling property. This work paves the way for developing high‐performance hybrid membranes by blending of hydrophilic polymer‐functionalized mesoporous fillers in the future. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47353.

Controlling conduction environments of anion exchange membrane by functionalized SiO2 for enhanced hydroxide conductivity

Alkaline anion exchange membrane (AAEM) attracts great attention as the key component of the sustainable AAEM fuel cell, while its design and development are still hindered by the structure-conductivity relationship of conducting group. Here three kinds of 200-nm SiO2 with imidazolium brushes tethered by –NH2, –OH, or –CO2H are synthesized and incorporated into chitosan matrix to prepare hybrid membranes. The microstructures of the hybrid membrane are investigated in detail. It is found that the hydrophilic brushes help the SiO2 to achieve uniform dispersion and well compatibility with chitosan matrix, thus resulting in abundant, distinct interfacial transfer pathways within hybrid membrane. Molecular simulation and conductivity measurement jointly reveal the structure-conductivity relationship of conducting group in AAEM: low electrostatic potential of imidazolium or bonding energy favors hydroxide conduction and vice versa. Thus the conduction ability of these three groups follows the order of QVI–NH2 > QVI–OH > QVI–CO2H. The tunable chemical environment, excellent water bonding ability, and continuous transfer sites within these interfacial pathways endows the hybrid membrane with significant hydroxide conductivity enhancement by up to 130%, superior to other inorganic particles. Besides, the hybrid membrane achieves obvious improvement of fuel cell performance relative to chitosan control membrane.

Hollow monocrystalline silicalite‐1 hybrid membranes for efficient pervaporative desulfurization

Hollow monocrystalline silicalite‐1 (HMS) nanoparticles were successfully synthesized and firstly incorporated into poly(ether‐block‐amide) (Pebax) to prepare hybrid membranes. The uniformly dispersed HMS in Pebax matrix interrupt the crystalline region and optimize the free volume property. The micropores on the HMS shell enhance the selectivity because of sieving effect, whereas the inner cavity benefits the rapid diffusion of penetrant and elevates the flux. When the content of HMS (200 nm) is 20 wt %, the hybrid membrane possesses a permeation flux of 20.63 kg/(m2 h) and an enrichment factor of 6.11 (82% and 23% higher than that of Pebax membrane, respectively), which surpass the upper bound of the state‐of‐the‐art reported polymeric membranes. Moreover, the hybrid membranes display the remarkable antiswelling and long‐term operation stability. This is a step forward in fabricating the hybrid membranes with superior separation performance by incorporating porous fillers with hollow structure. © 2018 American Institute of Chemical Engineers AIChE J, 65: 196–206, 2019

Embedding Ag+@COFs within Pebax membrane to confer mass transport channels and facilitated transport sites for elevated desulfurization performance

In this study, covalent organic frameworks (COFs) are utilized as carriers to immobilize metal ions in facilitated transport membranes for organic solvent separation for the first time. SNW-1, a kind of COFs with high amount of amino groups, were loaded with Ag+ ions and then incorporated into Pebax matrix to prepare hybrid membranes. Under optimal conditions, 48.11 wt% of Ag+ was loaded onto SNW-1 through a facile approach, which greatly intensified the mass transfer of unsaturated penetrant molecules (thiophene) by π-complexation. The channels within SNW-1 decreased the mass transport resistance and imparted the molecular sieving ability. The organic nature of SNW-1 optimized the interfacial affinity between filler and polymer, and rendered appropriate free volume properties. The membranes displayed simultaneously enhanced permeation flux and selectivity in pervaporation gasoline desulfurization. Especially, when the content of Ag+@SNW-1 was 9 wt%, the optimum performance towards thiophene concentration of 1312 ppm under 60 °C, was achieved with permeation flux of 16.35 kg/(m2 h) and enrichment factor of 6.8, which was increased by 78.5% and 30.0%, respectively, compared with pure Pebax membranes. In addition, the anti-swelling property of the membranes was improved and the membranes possessed superior long-term stability. This study demonstrates that COFs are superior carriers to immobilize metal ions within facilitated transport membrane for efficient liquid separation.

Biomineralization-mimetic preparation of hybrid membranes with ultra-high loading of pristine metal–organic frameworks grown on silk nanofibers for hazard collection in water

The efficient incorporation of porous materials into membranes to prepare hybrid membranes for the development of a separation device for water pollution treatment is described.

Enhanced dehydration performance of hybrid membranes by incorporating lanthanide-based MOFs

Metal-organic frameworks (MOFs) with high hydrolytic stability are highly needed to prepare polymer-MOFs hybrid membranes working in aqueous solution media. In this study, [Eu(BTB)(H2O)2·solvent]n (abbreviated as EuBTB), a kind of lanthanide-based two-dimensional MOFs, was utilized to prepare hybrid membranes for organic solvent dehydration owing to their hydrolytic stability arising from the relatively strong coordination bond between lanthanide ions and oxygen-containing groups. The detailed structure and properties of the hybrid membranes were well characterized. The hybrid membranes exhibited high mechanical strength and swelling resistance due to the strong interfacial interaction benefiting from the well complexation of EuBTB and sodium alginate (SA) through carboxylic groups. The horizontally aligned lamellar EuBTB could render ordered channels with the diameter of 0.5–0.8nm. Each Eu3+ in EuBTB could coordinate two water molecules and serves as carriers to facilitate the transportation of water molecules. Moreover, the incorporated EuBTB could render decreased crystallinity. Accordingly, the hybrid membranes exhibited superior permeability and selectivity for ethanol dehydration. Especially, the membrane containing 5wt% EuBTB exhibited an optimum performance with permeation flux of 1996g/m2h and separation factor of 1160 for 90wt% ethanol aqueous solution at 350K. Meanwhile, the hybrid membranes showed good long-term stability. This study may offer a generic and efficient approach to prepare MOFs-based hybrid membranes with high performance and stability for water-selective separation.