Journal of Membrane Science最新文献

{"title":"Enhanced selectivity of SPEEK membrane incorporated covalent organic nanosheet crosslinked graphene oxide for vanadium redox flow battery","authors":"Yuxia Zhang ,&nbsp;Haojie Liu ,&nbsp;Min Liu ,&nbsp;Xiangzhong Li ,&nbsp;Yitian Zhang ,&nbsp;Hongzhuo Sun ,&nbsp;Haifeng Shi ,&nbsp;Yuanyuan Feng","doi":"10.1016/j.memsci.2024.123410","DOIUrl":"10.1016/j.memsci.2024.123410","url":null,"abstract":"<div><div>It is difficult for sulfonated poly(ether ether ketone) (SPEEK) to possess both high proton conduction and vanadium resistance owing to the degree of sulfonation. Herein, the composite membranes (S/GO-TpTG) with cationic covalent organic nanosheet (TpTG) crosslinked graphene oxide (GO-TpTG) are prepared to enhance selectivity by optimizing the ion transport channels. The GO-TpTG can efficiently transport protons utilizing its cationic porous structure and acid-base pairs' interaction with SPEEK. Meanwhile, it can block vanadium ions through the Donnan exclusion and physical blocking effects. The S/GO-TpTG membrane with 3 wt% GO-TpTG exhibits excellent proton conductivity (82.7 mS cm^-1) and selectivity (77.9×10^-7 cm² min^-1). The VRFB with this membrane exhibits excellent energy efficiency (88.6 - 81.0 % at 100-200 mA cm^-2), cycle durability, and self-discharge time (209.8 h). This study confirms the great potential of GO-COF to balance proton conductivity and vanadium resistance, and provides an effective strategy to optimize proton channels.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"714 ","pages":"Article 123410"},"PeriodicalIF":8.4,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445700","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":"Numerical simulations of conductive heating vacuum membrane distillation: Quantitative analysis of shunted heat flows and preventive strategy of salt crystallization","authors":"Fei Han ,&nbsp;Bangyuan Song ,&nbsp;Jun Liu","doi":"10.1016/j.memsci.2024.123406","DOIUrl":"10.1016/j.memsci.2024.123406","url":null,"abstract":"<div><div>Membrane distillation, a thermal-membrane coupled technology, shows potential in desalination despite issues with temperature polarization. The conductive heating vacuum membrane distillation (CHVMD) process addresses temperature polarization by incorporating a thermal conducting layer on the feed side to transfer external heat to the membrane/feed interface. However, the internal mechanism is difficult to analyze through experiments. Hence, a three-dimensional computational fluid dynamics model was developed to simulate the process of heat and mass transfer in CHVMD, considering the effects of the thermophysical properties of the substances. The numerical model was utilized to investigate the influence of feed velocity, liquid-film layer thickness, input heat and heat input method on the system performance. Results showed that the temperature polarization inside the system had been effectively alleviated because the thermal conducting layer can centrally transfer external heat to the feed near the membrane. As the feed velocity and liquid-film layer thickness decreased, system flux increased. With only 25 W input heat, system flux can reach 9.32 kg/m²·h, leading to a larger area of concentrated salt distribution on membrane surface and increasing the risk of salt crystal deposition in membrane pores. Furthermore, we proposed the heat input methods with a variable heat flux, which can effectively solve the salt crystallization while further increasing system flux.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123406"},"PeriodicalIF":8.4,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535011","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":"Challenges of forward osmosis desalination processes using hydrogels as draw agents","authors":"Seyed Abdollatif Hashemifard ,&nbsp;Mohammad Ali Ghanavatyan ,&nbsp;Amir Jangizehi ,&nbsp;Hasan Salehi ,&nbsp;Alireza Shakeri ,&nbsp;Qusay F. Alsalhy ,&nbsp;Dhiyaa Al-Timimi ,&nbsp;Christoph Bantz ,&nbsp;Michael Maskos ,&nbsp;Sebastian Seiffert","doi":"10.1016/j.memsci.2024.123408","DOIUrl":"10.1016/j.memsci.2024.123408","url":null,"abstract":"<div><div>The present study aims to investigate the properties, identification, and comprehension of the obstacles encountered in the forward osmosis process when utilizing a hydrogel drawing agent (FO-HG). Furthermore, a comparison is made between the FO-HG system and conventional forward osmosis systems employing a salt solution drawing agent. The comparison and evaluation of the swelling process of hydrogel and the kinetics of water penetration are conducted in both un-constrained and constrained states. Furthermore, the investigation and analysis are carried out to determine the presence or absence of internal concentration polarization (ICP) and external concentration polarization (ECP) phenomena. These phenomena are studied in situations with and without mixing, as well as in different orientations of the membrane (FO-mode and PRO-mode). The impact of these phenomena on the water flux of the systems FO-HG and FO-NaCl is also examined. An evaluation is conducted to determine the influence of the amount and size of hydrogel used as a draw agent in the FO-HG system on the water flux. The results of the study reveal that smaller hydrogel particles in the FO-HG system exhibit a higher flux compared to larger particles. Additionally, it is observed that the water flux in PRO-mode is unexpectedly higher when salt water is used as feed solution. This phenomenon can be ascribed to a counter-osmotic effect, originating from the FO state. Despite the high water absorption capacity of hydrogel and its potential as an ideal drawing agent in the forward osmosis process, the results demonstrate that the flux of the FO-HG system is inferior to that of the FO-NaCl system. Finally, the focus is on resolving the low flux issue by suggesting a process involving multiple cycles throughout day and night. We investigate the influence of hydrogel particle size, membrane surface, hydrogel layer thickness, as well as swelling and deswelling time in one cycle. The swelling time displays a peak at an optimal absorption duration, while the deswelling time does not show a similar optimal point, highlighting the difference between swelling and deswelling phenomena. Therefore, the hydrogels' high absorption capacity alone is insufficient for achieving desalination success. The research findings emphasize the high importance of synthesis of a membrane with minimal resistance, enabling a high water flux and suitable selectivity.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"714 ","pages":"Article 123408"},"PeriodicalIF":8.4,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442258","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}

{"title":"High-performance polyurea nanofiltration membrane for waste lithium-ion batteries recycling: Leveraging synergistic control of bulk and interfacial monomer diffusion","authors":"Shiyu Xiao ,&nbsp;Yang Cao ,&nbsp;Yinhua Wan ,&nbsp;Xiaofeng Hang ,&nbsp;Jianquan Luo","doi":"10.1016/j.memsci.2024.123405","DOIUrl":"10.1016/j.memsci.2024.123405","url":null,"abstract":"<div><div>The development of high-performance nanofiltration (NF) membranes with extreme chemical stability is urgently needed for the recovery of spent lithium. In this study, a series of polyurea membranes with high lithium recovery efficiency and pH stability were fabricated by zone-regulated interfacial polymerization (IP). The reaction inhibitor Cu²⁺ in the bulk aqueous phase reduces IP intensity by reversibly binding to the amino groups of polyethyleneimine monomers through chelate bonds. Meanwhile, surfactant promote the uniform diffusion of macromolecular aqueous monomers at the phase interface. The milder polymerization reaction and the more stable phase interface endow the polyurea membrane (NF_{10k PEI-SDS-Cu}²⁺) with higher water permeance (2.1 L m⁻² h⁻¹ bar⁻¹), desirable MgCl₂ rejection (94.7 %), and excellent fabrication repeatability. Moreover, the membrane demonstrates stable separation selectivity for Co²⁺/Li⁺ and SO₄²⁻/Li⁺ under conditions of 0.05 mol L⁻¹ H₂SO₄ and 2 mol L⁻¹ LiOH, respectively. Our study provides a facile method for constructing NF membranes with extreme pH stability and confirms the feasibility of membrane-based lithium recovery.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"714 ","pages":"Article 123405"},"PeriodicalIF":8.4,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441688","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":"In-situ water separation enhanced methyl glycolate oxidation to methyl glyoxylate by catalytic membrane reactor","authors":"Jia Ding ,&nbsp;Shengyu Zhou ,&nbsp;Chenglong Qiu,&nbsp;Yuanhao Wu,&nbsp;Yulong Li,&nbsp;Chao Fan,&nbsp;Fangjun Shao,&nbsp;Shengwei Deng,&nbsp;Jianguo Wang","doi":"10.1016/j.memsci.2024.123403","DOIUrl":"10.1016/j.memsci.2024.123403","url":null,"abstract":"<div><div>The selective oxidation of methyl glycolate by oxygen is a green route for the synthesis of methyl glyoxylate, which however faces great challenges like the consecutive hydrolysis reaction between methyl glyoxylate and by-product water. Herein, we fabricated an in-situ water separation catalytic membrane reactor (CMR) to suppress the hydrolysis of methyl glyoxylate, which can promptly and preferentially remove water from the reaction system by a hydrophilic NaA membrane. The MoO₃@NaA CMR achieved a high methyl glyoxylate selectivity of 84.0 % at 260 °C and 2 bar, being 32.4 % higher than that of the conventional fixed-bed reactor (FBR), while the methyl glycolate conversion was almost the same for both modes. Moreover, the deactivation of the MoO₃ catalyst caused by water in CMR was also greatly inhibited, exhibiting excellent stability as compared to FBR. The in-situ water separation strategy in this work contributed to a new concept to improve the selectivity of easily hydrolyzable products.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"714 ","pages":"Article 123403"},"PeriodicalIF":8.4,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445701","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":"Sustainable approach for landfill leachate treatment through dielectric barrier discharge/ferrate (DBD/Fe(VI)) enhanced nanofiltration","authors":"Bin Liu,&nbsp;Danjing Lu,&nbsp;Tianliang Zhang,&nbsp;Yixun Shen,&nbsp;Zhen Qiu,&nbsp;Xin Mao,&nbsp;Ruoxi Wu","doi":"10.1016/j.memsci.2024.123404","DOIUrl":"10.1016/j.memsci.2024.123404","url":null,"abstract":"<div><div>Landfill leachate, with its high concentrations of persistent organic pollutants, salts, heavy metals, and emerging contaminants, presents significant environmental challenges. This study investigated the combination of dielectric barrier discharge (DBD) and ferrate (Fe(VI)) pretreatment technology in landfill leachate treatment, focusing on its effectiveness in enhancing oxidation performance and mitigating membrane fouling. The results indicated that after DBD/Fe(VI) treatment, TOC and UV₂₅₄ removal efficiencies increased by 44 % and 67 %, respectively. Additionally, the DBD/Fe(VI) system excelled in removing fluorescent substances and high molecular weight organic compounds, thereby reducing the formation of the cake layer on the nanofiltration membrane. This system enhanced oxidation performance through the synergistic production of reactive intermediates, with Fe(V)/Fe(IV) and •OH being the main active species, O₂^•-, and ¹O₂ also contributing significantly. The degradation pathway of perfluorooctanoic acid was investigated by utilizing it as the representative pollutant. Compared to the raw landfill leachate system, the DBD/Fe(VI) increased membrane flux by 104 %, while reducing reversible and irreversible fouling resistances by 67 % and 75 %, respectively. Furthermore, the advantages and practical application potential of the DBD/Fe(VI) system were evaluated from energy consumption, economic cost, and carbon dioxide emissions. The study offers an innovative method for landfill leachate treatment and fouling mitigation.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"714 ","pages":"Article 123404"},"PeriodicalIF":8.4,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441686","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-performance proton exchange membrane derived from N-heterocycle poly(aryl ether sulfone)s with ether-free hydrophilic blocks and exhibiting good stability and proton-conducting performance","authors":"Qian Liu ,&nbsp;Kaiwen Wu ,&nbsp;Shouhai Zhang ,&nbsp;Lin Zhuo ,&nbsp;Fanchen Sun ,&nbsp;Chenghao Wang ,&nbsp;Zijian Li ,&nbsp;Yiping He ,&nbsp;Yousi Chen ,&nbsp;Wei Zhang ,&nbsp;Xigao Jian","doi":"10.1016/j.memsci.2024.123402","DOIUrl":"10.1016/j.memsci.2024.123402","url":null,"abstract":"<div><div>The trade-off issue between proton conduction properties and stability is a constraint on the commercial application of non-fluorinated proton exchange membranes for fuel cells. To alleviate the issue, the multi-block N-heterocycle poly(aryl ether sulfone)s with ether-free hydrophilic blocks (b-SPDPESs), which is composited by diphenyl sulfone moieties and biphthalazindione structures with dense pendant benzenesulfonic groups, are developed to prepare high-performance membranes. The self-assembly effect of block copolymers not only improves the membrane stability but also constructs regular proton conduction channels. Moreover, the conduction channel consists of hydrophilic blocks without ether bonds, which effectively improves the tolerance of the membrane to radicals. The hydrogen-bond network between sulfonic groups and N-heterocycles in the channel improves the proton conduction efficiency, inhibits the swelling of the membrane, and improves the stability of the membrane. As a result, the swelling degree of b-SPDPESs membrane is only 15.8 %, the proton conductivity is as high as 238 mS cm⁻¹, the membrane aging broken time at 80 °C is between 4 and 6.6 h, and the fuel cells loading the membranes and feeding with hydrogen and air perform the max power density of between 0.65 and 1.25 W cm⁻². Modulating the sequence structure of chains and constructing multiblock polymers containing ether-free N-heretrocyclic blocks with sulfonic groups improve the stability of membranes while ensuring their proton conductivity.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"714 ","pages":"Article 123402"},"PeriodicalIF":8.4,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441687","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":"Unraveling the impact of ion adsorption and dielectric exclusion on nanofiltration through pH-regulated cylindrical nanopores","authors":"Tsung-Yen Tsou,&nbsp;Jyh-Ping Hsu ,&nbsp;Hsiu-Yu Yu","doi":"10.1016/j.memsci.2024.123399","DOIUrl":"10.1016/j.memsci.2024.123399","url":null,"abstract":"<div><div>We theoretically investigate the effects of ion adsorption on nanofiltration by simultaneously solving the modified Navier-Stokes, Poisson, and Nernst-Planck equations. Considering the confined space in the nanopore and the layered structure of water near the nanopore surface, hindered transport and anisotropic dielectric exclusion are separately incorporated to demonstrate the corresponding influences on salt rejection. For symmetric electrolytes, ion adsorption decreases the rejection of NaCl slightly but alters the rejection performance of CaSO₄ significantly. In particular, ion adsorption improves the rejection of asymmetric electrolytes due to the charge polarity reversal. With ion adsorption, the susceptibility of rejection to pH changes diminishes, and the dependence of rejection on feed concentration decreases. Owing to the counteracting effects of increased surface charge density and more pronounced ion screening as feed concentration rises, the rejection of CaCl₂ and Na₂SO₄ exhibits a maximum under specific pH ranges. 2D surface plots illustrate the dependence of rejection on concentration and pH. In addition, the effect of hindered transport is beneficial to rejection. As the diffusivities of ionic species drop or the diffusivity ratio of co-ions (relative to the surface charge polarity) to counterions decreases, the rejection increases pronouncedly. Lastly, dielectric exclusion in the nanopore results in a more negative surface charge density due to the repulsion of protons from the surface, thereby causing a shift of the isoelectric point towards lower pH values. The effect of the reduction in the perpendicular dielectric permittivity may be enhanced or offset partially by that of the increase in the parallel dielectric permittivity.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"714 ","pages":"Article 123399"},"PeriodicalIF":8.4,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142534732","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":"Co-free La0.9Ca0.1Fe1-xCuxO3-δ (x = 0.05, 0.1) hollow fiber membranes for H2/N2 and H2/CO co-production by coupling water splitting and partial oxidation of methane","authors":"Shude Zhang ,&nbsp;Jason Yi Juang Yeo ,&nbsp;Jian Song ,&nbsp;Basil T. Wong ,&nbsp;Jaka Sunarso ,&nbsp;Tao Li ,&nbsp;Shaomin Liu","doi":"10.1016/j.memsci.2024.123401","DOIUrl":"10.1016/j.memsci.2024.123401","url":null,"abstract":"<div><div>Mixed ionic-electronic conducting oxygen transport membranes have demonstrated high oxygen permeability, which can be coupled with other oxidation reactions. The membrane reactor coupling water splitting with partial oxidation of methane reaction has great practical potential as it produces valuable feedstocks such as ammonia syngas and liquid fuel syngas. However, the existing membrane materials often exhibit structural stability issue and/or unsatisfactory oxygen permeability. In this work, copper-doped LCF_1-xCu_xO_3-δ (x = 0.05–0.1) hollow fiber membranes were used for hydrogen production by coupling the oxygen separation with water splitting and partial oxidation of methane. A small amount of copper doping could effectively reduce the sintering temperature of the membrane and increase the conductivity of the material, where a maximum oxygen flux of 0.55 mL min⁻¹ cm⁻² was achieved on LCFCu_0.05 membrane under the experimental conditions. In the water splitting test, a maximum hydrogen production rate of 3.7 mL min⁻¹ cm⁻² was achieved by using steam as the raw gas (driven by nitrogen) at the shell side and hydrogen/helium mixture as the sweep gas at the lumen side of the LCFCu_0.05 hollow fiber membrane with 10 wt.% Ni/SDC catalyst coated on the shell side. As pure methane gas was introduced at the lumen side coated with Ni/LaNiO₃/γ-Al₂O₃ catalyst, the H₂ production rate was further increased to its highest of 4.4 mL min⁻¹ cm⁻². In addition, the membrane reactor could be stably operated for 300 h under three different flow conditions without performance degradation. These results paves the development of robust membrane reactor for integrated water splitting and partial oxidation of methane.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"714 ","pages":"Article 123401"},"PeriodicalIF":8.4,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441689","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}

{"title":"Metal-organic cages in polyimide and polyetheretherketone thin film composite mixed matrix membranes for gas separation","authors":"Mariagiulia Longo ,&nbsp;Riccardo Mobili ,&nbsp;Marcello Monteleone ,&nbsp;Sonia La Cognata ,&nbsp;Alessio Fuoco ,&nbsp;Elisa Esposito ,&nbsp;Massimo Boiocchi ,&nbsp;Chiara Milanese ,&nbsp;Donatella Armentano ,&nbsp;Pegah Hajivand ,&nbsp;Valeria Amendola ,&nbsp;Johannes C. Jansen","doi":"10.1016/j.memsci.2024.123391","DOIUrl":"10.1016/j.memsci.2024.123391","url":null,"abstract":"<div><div>Membrane-based gas separation has been recognized as one of the most promising and energy-efficient processes for CO₂ capture from industrial gas streams. Remarkably, commercial gas separation membranes typically contain conventional polymers with sub-optimal performance, necessitating the search for better-performing materials. In this work, we developed novel mixed matrix membranes (MMMs) based on the benchmark polyimide Matrimid® 9725 and a soluble poly (ether ether ketone) PEEK-WC. The addition of a zinc-based metal-organic cage (MOC) featuring two calixsalen macrocyclic units significantly improved the transport properties for various gas pairs with an up to 100 % increase in permeability and up to 10 % increase in selectivity at 30 % MOC. SEM and DSC analyses offered valuable insights into the compatibility between the polymer and MOC, revealing excellent dispersion of up to 30 % of MOC with almost complete phase separation from the matrix. The thermal properties and transport properties were successfully described using the Fox equation and the Maxwell model, respectively. Most interestingly, thin film composites (TFCs) performed much better at 3 times higher cage concentrations than the corresponding self-standing thick films because the faster solvent evaporation limited crystal growth to sub-micron size, favouring a fine homogeneous distribution of the MOC in the polymer matrix. Based on their pure and mixed gas permeation, the TFC-MMMs show promise for the future development of new-generation gas separation membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"714 ","pages":"Article 123391"},"PeriodicalIF":8.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142534653","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}