Advanced Membranes最新文献

英文中文

Imidazole-functionalized siloxane cross-linked poly(aryl ether sulfone) anion exchange membranes for monovalent anion separation via electrodialysis 电渗析分离单价阴离子的咪唑功能化硅氧烷交联聚芳醚砜阴离子交换膜

IF 9.5

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100165

Zhiqiang Wu , Yu Xu , Junbin Liao , Qishun Zhang , Wenlong Ding , Yanqing Xu , Huimin Ruan , Jiangnan Shen , Congjie Gao

A siloxane cross-linked, amino-long-chain modified poly(aryl ether sulfone) (PPH-Im_SiO-NH₂-X) anion exchange membrane (AEM) has been synthesized. The results demonstrated that the perm-selectivity (

P_{S O_{4}^{2 -}}^{C l^{-}}

) of the PPH-Im_SiO-NH₂-X AEMs gradually increased with the increasing content of the amino chains and reached its maximum value of 30.17 in the PPH-Im_SiO-NH₂-50 AEM. The mechanism underlying the enhanced selectivity was systematically analyzed by combining SAXS characterization with physico-chemical property evaluations. Specifically: (i) The siloxane cross-linked network effectively suppressed membrane swelling (water uptake ≤8.81 %, swelling ratio ≤3.03 %), thereby ensuring the stability of the ion transport channels; (ii) The amino long-chain interacted physically with the cross-linked network to form entanglements, reducing the size of ion clusters to 0.332 nm and further narrowing the ion channels, which selectively inhibited the migration of SO₄²⁻ via a size-sieving effect. This study not only broadened the application scope of siloxane cross-linking agents in the field of ion exchange membranes (IEMs) but also provided a novel material design strategy for developing anion exchange membranes with high selectivity and excellent stability.

合成了一种硅氧烷交联、氨基长链改性聚芳醚砜（phh - imsio - nh2 - x）阴离子交换膜。结果表明，随着氨基链含量的增加，PPH-ImSiO-NH2-X AEM的选择性（PSO42−Cl−）逐渐增加，在PPH-ImSiO-NH2-50 AEM中达到最大值30.17。结合SAXS表征和理化性质评价，系统分析了选择性增强的机理。具体来说：(1)硅氧烷交联网络有效抑制了膜的溶胀（吸水率≤8.81%，溶胀率≤3.03%），从而保证了离子传递通道的稳定性；（ii）氨基长链与交联网络物理相互作用形成缠结，将离子簇的尺寸减小到0.332 nm，并进一步缩小离子通道，通过筛分效应选择性地抑制了SO42−的迁移。该研究不仅拓宽了硅氧烷交联剂在离子交换膜领域的应用范围，而且为开发具有高选择性和优异稳定性的阴离子交换膜提供了一种新的材料设计策略。

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引用次数: 0

Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivity 稳健的甲氧基共价有机框架膜实现了高效的近分子量选择性

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2024.100112

Yanqing Xu , Jiaqi Xiong , Chenfei Lin , Yixiang Yu , Qite Qiu , Junbin Liao , Huimin Ruan , Arcadio Sotto , Jiangnan Shen

Uniform pore size is essential for molecular sieving in separation membranes. Traditional nanofiltration (NF) polymer membranes struggle with precise structure control due to random chain packing and rapid cross-linking, leading to varied pore sizes and poor molecular discrimination. Covalent organic frameworks (COFs) offer ordered porous structures for enhanced molecular selectivity. We synthesized composite COFs membranes with triphenylamine derivatives through interfacial polymerization, adjusting pore channel functional groups to achieve high water permeance and size-selective molecule retention. The TFB-OMe-TAPA COFs membrane demonstrated sharp rejection profiles, separating solutes of different molecular sizes. A three-stage cascade process was used to fractionate binary molecules with varying charges, achieving a separation factor of 26.7 for heterogeneous charge molecules. This work reveals the selectivity of COF membranes in near-molecular-weight systems, expanding their potential in molecular separations.

均匀的孔径对分离膜的分子筛分至关重要。传统的纳滤聚合物膜由于无序链填充和快速交联，难以精确控制结构，导致孔径大小不一，分子识别能力差。共价有机框架（COFs）提供有序的多孔结构，以增强分子选择性。我们通过界面聚合，调整孔隙通道官能团，合成了具有三苯胺衍生物的复合COFs膜，以实现高透水性和大小选择性分子保留。TFB-OMe-TAPA COFs膜具有明显的分离特性，可分离不同分子大小的溶质。采用三级级联工艺对不同电荷的二元分子进行分馏，对非均相电荷分子的分离系数为26.7。这项工作揭示了COF膜在近分子量体系中的选择性，扩大了它们在分子分离中的潜力。

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引用次数: 0

Activated coke fly ash-aided SiC supports: Enhanced mechanical strength and durability for high-temperature gas filtration 活性焦炭粉煤灰助碳化硅支架：提高高温气体过滤的机械强度和耐久性

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100147

Qilian Li , Bin Lin , Wei Wei , Zhaoxiang Zhong , Weihong Xing

Silicon carbide (SiC) ceramic membranes are promising for high-temperature gas filtration due to their excellent thermal and chemical stability. However, the industrial deployment of conventional SiC ceramic membranes is limited by their low bending strength and high fabrication cost. This study pioneers a sustainable strategy utilizing industrial waste activated coke fly ash (ACFA), as a dual-functional sintering aid and pore-forming agent for the fabrication of high-performance SiC supports. By systematically investigating the sintering kinetics and phase evolution mechanism of the ACFA-aided SiC supports, we established a composition-property relationship that reveals the critical role of ACFA-derived mineral phases in simultaneously enhancing mechanical integrity and filtration performance. With 12 wt% ACFA sintered at 1400 °C the SiC support achieved optimal bending strength (28.6 MPa). This bending strength was approximately 25% higher than that of conventional SiC supports (22.8 MPa). Moreover, the ACFA-aided SiC support exhibited satisfactory thermal shock resistance and corrosion resistance during 20 cycles of thermal shocking and alkali metal salt corrosion tests. This work provides a sustainable route for fabricating cost-effective SiC supports with enhanced mechanical strength to broaden their applications in industrial hot gas filtration.

碳化硅（SiC）陶瓷膜由于其优异的热稳定性和化学稳定性，在高温气体过滤中具有广阔的应用前景。然而，传统的碳化硅陶瓷膜的工业应用受到其低弯曲强度和高制造成本的限制。本研究开创了一种可持续发展的策略，利用工业废活性焦炭粉煤灰（ACFA）作为双功能烧结助剂和成孔剂，用于制造高性能SiC支架。通过系统地研究acfa辅助SiC支架的烧结动力学和相演化机制，我们建立了成分-性能关系，揭示了acfa衍生矿物相在同时提高机械完整性和过滤性能方面的关键作用。在1400℃下烧结12wt %的ACFA， SiC支架获得了最佳的抗弯强度（28.6 MPa）。这种抗弯强度比传统碳化硅支架（22.8 MPa）高出约25%。此外，在20次热冲击和碱金属盐腐蚀试验中，acfa辅助SiC支架具有良好的抗热冲击和耐腐蚀性能。这项工作为制造具有更高机械强度的具有成本效益的SiC支架提供了一条可持续的途径，以扩大其在工业热气体过滤中的应用。

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引用次数: 0

Preparation of COF-based membranes via chiral induction for efficient enantioselective resolution 手性诱导制备cof基膜的有效对映选择性分离

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2024.100113

Fanmengjing Wang , Yizhihao Lu , Kaiqiang He , Philip J. Marriott , Matthew R. Hill , Huanting Wang

Efficient chiral resolution is highly important in the food, pharmaceutical and agriculture industries because of the distinctive biological or pharmaceutical properties of enantiomers. Membrane-assisted chiral separation, which has the potential advantages of low cost and high yield, has attracted significant research attention, but the fabrication of high-quality chiral membranes displaying both high selectivity and high flux of enantiomers is still a challenge. Covalent organic frameworks (COFs), a class of porous materials with high porosity and diverse functionalities, are promising for the development of high-performance chiral separation membranes; however, these materials have yet to be developed. In this work, we demonstrated the in situ growth of a chiral TpPa-1 (cTpPa-1) membrane on polymer substrates via chiral induction. The resulting cTpPa-1@PAN membrane displayed a maximum enantioselectivity of 99.3 % ee for resolving limonene racemates with a flux of 5.5 mmol m⁻² h⁻¹. Furthermore, the effects of feed solvent polarity on membrane performance, the versatility of cTpPa-1 for making chiral composite membranes, and the mechanisms associated with cTpPa-1-based membranes were studied and are discussed.

由于对映体独特的生物学或药学性质，有效的手性拆分在食品、制药和农业工业中非常重要。膜辅助手性分离技术具有低成本、高收率的潜在优势，已成为研究热点，但如何制备高选择性、高通量的手性膜仍是一个难题。共价有机骨架（COFs）是一类具有高孔隙率和多种功能的多孔材料，是开发高性能手性分离膜的重要材料；然而，这些材料还有待开发。在这项工作中，我们证明了通过手性诱导在聚合物底物上原位生长手性TpPa-1 （cTpPa-1）膜。所得cTpPa-1@PAN膜在通量为5.5 mmol m−2 h−1的情况下，对柠檬烯外消旋体的最大对映选择性为99.3% ee。此外，研究并讨论了进料溶剂极性对膜性能的影响、cTpPa-1在制备手性复合膜中的通用性以及cTpPa-1基膜的相关机理。

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引用次数: 0

EVOH functionalized PE battery separator as the porous substrate for TFC organic solvent nanofiltration membranes EVOH功能化PE电池隔膜作为TFC有机溶剂纳滤膜的多孔基板

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100131

Guoke Zhao, Tian Zhong, Xinkai Li, Hao Yu, Guoyuan Pan, Yang Zhang, Yiqun Liu

Scholarly discourse surrounding the thin film composite organic solvent nanofiltration (TFC OSN) membrane field has largely been dominated by focusing on the optimization of the selective layer. However, this often leaves the porous support layer, with its innate solvent resistance, cost-effectiveness, and superior permeability, in the shadows. This study presents a novel OSN membrane utilizing a polyethylene (PE) battery separator as the porous substrate. The structural affinity between ethylene-vinyl alcohol and PE facilitates efficient hydrophilic modification, which allows for uniform and compact polyamide selective layer formation through interfacial polymerization. The HPE-NF-1.0 membrane exhibits rejections of 99.5 %, 96.7 %, 100 %, and 97.2 % for Methyl Orange, Rhodamine B, Congo red, and Rose Bengal, respectively. It also shows a solvent flux of 52.5 LMH in methanol and robust resistance against alcoholic solvents and DMF. Using PE as the porous substrate, we bypass intricate and time-demanding cross-linking processes and complex pore-preservation post-treatments, providing a simplified strategy for TFC OSN membrane fabrication.

围绕薄膜复合有机溶剂纳滤（TFC OSN）膜领域的学术论述主要集中在选择层的优化上。然而，这往往使多孔支撑层，其固有的抗溶剂性，成本效益和优越的渗透性，在阴影中。本研究提出了一种以聚乙烯电池隔膜为多孔基板的新型OSN膜。乙烯-乙烯醇和聚乙烯之间的结构亲和性促进了高效的亲水性改性，从而允许通过界面聚合形成均匀紧凑的聚酰胺选择层。HPE-NF-1.0膜对甲基橙、罗丹明B、刚果红和孟加拉玫瑰的排斥率分别为99.5%、96.7%、100%和97.2%。它在甲醇中的溶剂通量为52.5 LMH，对酒精溶剂和DMF具有很强的抗性。使用PE作为多孔基底，我们绕过了复杂且耗时的交联过程和复杂的孔隙保存后处理，为TFC OSN膜的制备提供了一种简化的策略。

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引用次数: 0

Combining zeolite with MOF glass to construct crystal-glass composite membranes for improved hydrogen separation 将沸石与MOF玻璃相结合，构建晶体-玻璃复合膜，提高氢分离性能

IF 9.5

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100164

Hongbin Wang , Caiyan Zhang , Lili Fan , Zixi Kang , Daofeng Sun

Metal-organic framework glasses (MOF-a_g), formed through melt-quenching crystalline MOFs, have emerged as promising membrane materials owing to their processability and retained porosity. While MOF-a_g membranes exhibit exceptional sieving selectivity, their compromised permeability has driven the development of crystal-glass composite (CGC) membranes, where crystalline porous fillers are embedded in MOF-a_g matrices. Nevertheless, the high-temperature melt-quenching process poses a significant challenge to the thermal stability of porous fillers, inducing structural degradation of thermally labile fillers and severely compromising gas permeability. In this study, we report the rational design of FAU-type zeolite-embedded ZIF-62-a_g composite membranes to improve hydrogen separation performance. The optimized 20-FAU-ZIF-62-a_g CGC membrane (20 wt% zeolite filler loading) exhibits the H₂ permeability of 2516 Barrer and H₂/CH₄ selectivity of 52.4 for single-gas permeation, representing 179 % and 45 % improvements over the pristine ZIF-62-a_g membrane. The zeolite incorporation not only improves porosity but also enhances mechanical strength, evidenced by the enhanced Young's modulus (85 %) and hardness (55 %). Further processing with an alternative zeolite filler (MFI-type zeolite) or an alternative MOF-a_g matrix (TIF-4) validates the universality of zeolite-MOF-a_g CGC membranes in improving performance. This study provides a versatile platform for fabricating robust MOF-a_g-based membranes with improved separation performance.

金属有机框架玻璃（mof -organic framework glass, MOF-ag）是由熔融淬火结晶mof形成的，由于其可加工性和保留的孔隙率而成为有前途的膜材料。虽然MOF-ag膜表现出优异的筛分选择性，但其渗透性的降低推动了晶体玻璃复合材料（CGC）膜的发展，其中晶体多孔填料嵌入MOF-ag基质中。然而，高温熔体淬火工艺对多孔填料的热稳定性提出了重大挑战，导致热不稳定填料的结构降解，严重影响透气性。在本研究中，我们报道了合理设计fu型沸石包埋的ZIF-62-ag复合膜以提高氢分离性能。优化后的20- fu -ZIF-62-ag CGC膜（沸石填充量为20%）的H2渗透率为2516 Barrer， H2/CH4选择性为52.4，比原始的ZIF-62-ag膜分别提高了179%和45%。沸石的掺入不仅改善了孔隙率，而且提高了机械强度，杨氏模量（85%）和硬度（55%）得到了提高。采用替代沸石填料（mfi型沸石）或替代MOF-ag基质（TIF-4）进一步处理，验证了沸石-MOF-ag CGC膜在提高性能方面的通用性。这项研究提供了一个通用的平台来制造坚固的mof -ag基膜，具有更好的分离性能。

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引用次数: 0

Anchoring metal ions in iCOF to enhance the charge density for boosting CO2 separation in mixed matrix membranes 在iCOF中锚定金属离子以提高电荷密度，促进混合基质膜中CO2的分离

IF 9.5

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/j.advmem.2025.100167

Yong Zhang , Chao Liang , Zhaomin Li, Xueqin Li

Ionic covalent organic frameworks (iCOFs), with electrostatic microenvironment suitable for CO₂ separation, are regarded as ideal materials for gas membrane separation. However, the improvement of CO₂/CH₄ selectivity remains challenging because of low charge density of iCOFs. This study proposes the strategy for efficient CO₂ separation by anchoring metal ions (Cu²⁺, Al³⁺ and Zr⁴⁺) between iCOF interlayers to regulate the charge density of iCOF in mixed matrix membranes (MMMs). The polarizability of different metal ions regulates their charge transfer with iCOFs, leading to charge densities that follow the increased order: Cu-COF < Al-COF < Zr-COF. Compared to metal-COFs with low charge density, the Zr-COF featuring high charge density exhibits a more favorable positively electrostatic microenvironment for CO₂ separation in MMMs, primarily attributed to the fact that it enhances interaction with the negatively charged oxygen atoms in CO₂ molecules, thereby improving CO₂ transport in MMMs. Pebax/Zr-COF MMM exhibit the optimal CO₂ separation performance with enhanced permeability (∼66 %) and selectivity (∼93 %) than that of pure Pebax membrane, surpassing the Robeson upper bound. Therefore, anchoring metal ions in iCOF interlayers to enhance charge density offers a strategy for designing efficient CO₂ separation in MMMs.

离子共价有机骨架（iCOFs）具有适合CO2分离的静电微环境，是理想的气膜分离材料。然而，由于iCOFs的电荷密度低，提高CO2/CH4选择性仍然具有挑战性。本研究提出了在混合基质膜（MMMs）中，通过在iCOF中间层之间锚定金属离子（Cu2+， Al3+和Zr4+）来调节iCOF的电荷密度来实现高效CO2分离的策略。不同金属离子的极化率调节其与iCOFs之间的电荷转移，导致电荷密度依次为Cu-COF <； Al-COF < Zr-COF。与低电荷密度的金属- cofs相比，高电荷密度的Zr-COF在MMMs中表现出更有利的正静电微环境，这主要是由于它增强了与CO2分子中带负电荷的氧原子的相互作用，从而改善了CO2在MMMs中的运输。Pebax/Zr-COF MMM具有最佳的CO2分离性能，与纯Pebax膜相比，其渗透率（~ 66%）和选择性（~ 93%）都有所提高，超过了Robeson上限。因此，在iCOF中间层中锚定金属离子以提高电荷密度为设计MMMs中有效的CO2分离提供了一种策略。

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引用次数: 0

Inside Front Cover - Aims and Scope 内页封面-目标和范围

IF 9.5

Advanced Membranes

Pub Date : 2025-01-01 DOI: 10.1016/S2772-8234(25)00069-7

引用次数: 0

Progress in design of halloysite nanotubes-polymer nanocomposite membranes and their applications 埃洛石纳米管-聚合物纳米复合膜的设计及其应用进展

Advanced Membranes

Pub Date : 2024-02-01 DOI: 10.1016/j.advmem.2024.100091

Lijuan Qin, Guanying Dong, Yi Nie, R. Fakhrullin, Bing Zhang, Yatao Zhang

引用次数: 0

Metal-organic frameworks-based mixed matrix pervaporation membranes for recovery of organics 用于回收有机物的基于金属有机框架的混合基质渗透膜

Advanced Membranes

Pub Date : 2024-02-01 DOI: 10.1016/j.advmem.2024.100092

Zehai Xu, Chao Liu, Lulu Xiao, Qin Meng, Guoliang Zhang

引用次数: 0

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