Journal of Membrane Science最新文献_第5页

Selective ion transport in ZIF-8 membranes with ultramicropores 具有超微孔的ZIF-8膜的选择性离子传输

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-01-16 DOI: 10.1016/j.memsci.2026.125171

Hao Yu , Wen-Hsiung Lai , Jerry Y.S. Lin

ZIF-8 membranes with ultramicropores have recently gained attention for applications in ion separation due to their structural similarity to biological ion channels. Nonetheless, their inherent ionic conductivity, diffusivity, and chemical stability in aqueous electrolyte solutions have yet to be thoroughly evaluated. In this study, a vacuum-assisted thermal activation approach was implemented to eliminate residual gases and trapped impurities from the ultramicropores of ZIF-8, facilitating reproducible measurement of its intrinsic ion transport properties. The ionic conductivities and diffusivities of various cations in aqueous solvent were quantified for alumina support and ZIF-8 membrane using a resistance-in-series model. The results show that monovalent ions (Li⁺, Na⁺, K⁺) possess higher conductivity and diffusivity compared to divalent ions (Mg²⁺, Ca²⁺) (Li⁺/Mg²⁺ or Li⁺/Ca²⁺ selectivity respectively of 28 and 63), largely attributable to partial dehydration and steric sieving within angstrom-scale apertures of ZIF-8. The intrinsic conductivity and diffusivity of cations within the ZIF-8 layer is low and markedly restricted, ranging from 4 × 10⁻⁸ to 10⁻⁹ S/cm and 10⁻¹⁴ to 10⁻¹⁶ m² s⁻¹ respectively, underscoring the substantial confinement exerted by the ultramicroporous structure of ZIF-8. Time-resolved resistance assessments further reveal that ZIF-8 membranes exhibit limited chemical stability in aqueous electrolytes, as resistance decreases rapidly to substrate level within 10–15 h. These findings present a big challenge to use ZIF-8 membranes for ion separation due to their extremely low ion flux and limited stability in aqueous system. This research offers the first reliable quantification of ionic conductivity, diffusivity, and selectivity in ultramicropores, providing insight for the systematic design of MOF membranes with improved selectivity and stability.

具有超微孔的ZIF-8膜由于其结构与生物离子通道相似，近年来在离子分离领域的应用受到了广泛的关注。尽管如此，它们固有的离子电导率、扩散率和在电解质水溶液中的化学稳定性尚未得到彻底的评估。在本研究中，采用真空辅助热活化方法消除了ZIF-8超微孔中的残留气体和捕获杂质，促进了其固有离子输运特性的可重复性测量。采用串联电阻模型，定量了氧化铝载体和ZIF-8膜水溶液中各种阳离子的离子电导率和扩散系数。结果表明，与二价离子（Mg2+, Ca2+）相比，单价离子（Li+, Na+, K+）具有更高的电导率和扩散率（Li+/Mg2+或Li+/Ca2+的选择性分别为28和63），这主要是由于ZIF-8在埃级孔径内的部分脱水和空间筛分所致。ZIF-8层内阳离子的固有电导率和扩散率较低且受到明显限制，分别为4 × 10−8 ~ 10−9 S/cm和10−14 ~ 10−16 m2 S−1，强调了ZIF-8的超微孔结构对其施加的实质限制。时间分辨率电阻评估进一步表明，ZIF-8膜在水溶液中表现出有限的化学稳定性，因为电阻在10-15小时内迅速下降到底物水平。这些发现给使用ZIF-8膜进行离子分离带来了很大的挑战，因为它们的离子通量极低，在水溶液中的稳定性有限。该研究首次对超微孔中的离子电导率、扩散率和选择性进行了可靠的量化，为系统设计具有更高选择性和稳定性的MOF膜提供了见解。

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引用次数: 0

Metal salt-triggered poly(m-phenylenediamine)-metal colloid modulated interfacial polymerization for high performance polyamide reverse osmosis membrane 金属盐触发聚间苯二胺-金属胶体调制界面聚合用于高性能聚酰胺反渗透膜

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-01-14 DOI: 10.1016/j.memsci.2026.125165

Houkang Pu , Hanjing Xue , Xiaojuan Wang , Xiaolai Zhang , Xinyan Wang , Weizheng Zhang , Yan Zhang , Congjie Gao , Xueli Gao

The utilization of colloidal polymers to regulate interfacial polymerization (IP) kinetics allows for the controlled design of thin-film nanocomposite (TFN) reverse osmosis (RO) membrane structures. However, inadequate interfacial compatibility between the polymer and polyamide (PA) matrix can negatively affect the membrane's fine structure. In this study, the oxidative properties of metal salt ions (M = Cu²⁺, Pd²⁺, Pt⁴⁺, Ag⁺, Ir³⁺, Fe³⁺, Ni²⁺, Co²⁺, Mn²⁺) were ingeniously employed to induce in-situ oxidative self-polymerization of a small amount of reactive amine monomers (m-phenylenediamine, MPD) in aqueous phase solution, resulting in the formation of poly(m-phenylenediamine)-metal (PMPD-M) colloidal polymer. The in-situ formed colloidal polymers enhanced the adsorption and storage of residual amine monomers and optimized the spatial-temporal distribution of MPD at the aqueous-organic phase interface. The hydrogen bonding between the polar-rich PMPD-M polymer and MPD restricted the diffusion of MPD from the aqueous phase to the organic phase, leading to a decrease in the intrinsic thickness of PA layers and a reduction in transmembrane mass transfer resistance and water molecule transport pathways. Moreover, the amino-rich PMPD-M polymer significantly enhanced interfacial compatibility with the PA matrix, ensuring the high desalination performance of RO membranes. In the brackish water application test, the TFN-Fe₂ membrane exhibited the highest water permeance (2.72 L m⁻² h⁻¹ bar⁻¹) and satisfactory salt rejection (99.30 %). The proposed in-situ oxidative self-polymerization strategy for monomers is anticipated to stimulate the development of various colloidal polymers in water treatment and even gas separation membrane technologies.

利用胶体聚合物调节界面聚合（IP）动力学使得薄膜纳米复合材料（TFN）反渗透（RO）膜结构的可控设计成为可能。然而，聚合物与聚酰胺（PA）基质之间的界面相容性不足会对膜的精细结构产生负面影响。本研究巧妙地利用金属盐离子（M = Cu2+, Pd2+, Pt4+, Ag+, Ir3+, Fe3+, Ni2+, Co2+, Mn2+）的氧化性质，诱导少量反应胺单体（间苯二胺，MPD）在水相溶液中原位氧化自聚合，形成聚间苯二胺-金属（PMPD-M）胶体聚合物。原位形成的胶体聚合物增强了残余胺单体的吸附和储存，优化了MPD在水-有机相界面的时空分布。富极性PMPD-M聚合物与MPD之间的氢键限制了MPD从水相向有机相的扩散，导致PA层的固有厚度减小，跨膜传质阻力和水分子运输途径减少。此外，富含氨基的PMPD-M聚合物显著增强了与PA基质的界面相容性，确保了RO膜的高脱盐性能。在微咸水应用试验中，TFN-Fe2膜表现出最高的透水性（2.72 L m−2 h−1 bar−1）和良好的阻盐性（99.30%）。所提出的原位氧化自聚合策略有望刺激各种胶体聚合物在水处理甚至气体分离膜技术中的发展。

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引用次数: 0

Defect engineering strategy of in-situ grown COF-300 nanofiltration membranes for selective dye separation 原位生长COF-300纳滤膜选择性染料分离的缺陷工程策略

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-01-14 DOI: 10.1016/j.memsci.2026.125166

Ziyi Zhang , Jinwen Jiao , Yunfei Jiang , Zerong Wang , Jingqi Wang , Di Cai , Houchao Shan , Jing Zhao , Tifeng Jiao

Covalent organic framework nanofiltration membranes show great promise for treating dyeing wastewater due to their precise molecular sieving capability; however, achieving high water permeability while maintaining excellent rejection remains a fundamental challenge. To address this limitation, we develop a defect engineering strategy through in situ non-stoichiometric polymerization on ceramic tubular substrates. By precisely controlling the molar ratio of dialdehyde and monoaldehyde monomers, we successfully constructed hydrophilic COF-300 membranes containing tailored missing-linker defects and exposed amino functional groups. The introduced defects not only enhance pore connectivity and reduce mass transfer resistance but also expose hydrophilic amino groups, significantly improving water permeance without compromising structural integrity. The optimized membrane demonstrates an ultrahigh water permeance of 750 L m⁻² h⁻¹·MPa⁻¹, while retaining over 98 % rejection for various dyes and below 8 % salt retention. Moreover, the membrane exhibits outstanding antifouling performance and long-term stability, attributed to its engineered nanoporosity and superhydrophilic surface. This work provides a versatile strategy for breaking the permeability–selectivity trade-off in membrane science, offering new perspectives for designing high-performance separation membranes for sustainable wastewater treatment.

共价有机框架纳滤膜由于其精确的分子筛选能力，在处理印染废水方面显示出很大的前景；然而，在保持优异的排阻性的同时实现高透水性仍然是一个根本性的挑战。为了解决这一限制，我们开发了一种缺陷工程策略，通过在陶瓷管基板上的原位非化学计量聚合。通过精确控制双醛和单醛单体的摩尔比，我们成功构建了含有定制缺失连接缺陷和暴露的氨基官能团的亲水性COF-300膜。引入的缺陷不仅增强了孔隙连通性，降低了传质阻力，而且暴露了亲水性氨基，在不损害结构完整性的情况下显著提高了透水性。优化后的膜具有750 L m−2 h−1·MPa−1的超高透水性，对各种染料的去除率超过98%，盐潴留率低于8%。此外，由于其工程纳米孔和超亲水性表面，该膜具有出色的防污性能和长期稳定性。这项工作为打破膜科学中渗透性与选择性之间的权衡提供了一种通用策略，为设计用于可持续废水处理的高性能分离膜提供了新的视角。

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引用次数: 0

Electrostatic assembly-derived β-ketoenamine covalent organic framework/polyacrylonitrile composite nanofiltration membrane for efficient removal of emerging contaminants 静电组装衍生的β-酮胺共价有机骨架/聚丙烯腈复合纳滤膜高效去除新出现的污染物

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-01-14 DOI: 10.1016/j.memsci.2026.125163

Tong Yu , Cuiyu Huang , Yu Zhang , Quanling Xie , Xiwen He , Langxing Chen , Yukui Zhang

Emerging contaminants (ECs) such as pharmaceuticals pose increasing threats to aquatic environments and human health. Therefore, it is urgent to develop high-performance nanofiltration (NF) membranes for the efficient removal of ECs. In this work, we present a scalable and energy-efficient strategy for fabricating a novel covalent organic framework (COF)-based NF membrane under mild conditions. The membrane was prepared via electrospinning and subsequent electrostatic assembly, consisting of a porous PAN@TpPa support layer and a precisely deposited TpPa-SO₃H selective layer. We employed a key interfacial engineering approach, in which protonated TpPa interlayer enhanced electrostatic interactions between layers, thereby forming a dense and negatively charged interface with outstanding long-term stability. The optimized membrane with 72 h TpPa growth time and 30 mg TpPa-SO₃H loading, achieved a high rejection of 98.89 % for diclofenac sodium (DS) and an excellent permeance of 16.79 L m⁻² h⁻¹·bar⁻¹, outperforming commercial NF membranes. Moreover, the PAN@TpPa/TpPa-SO₃H composite membrane exhibited remarkable long-term stability and superior antifouling performance. Molecular dynamics simulations revealed that the superior separation performance results from the synergistic effects of size sieving and Donnan exclusion. This work provides a mild and scalable interfacial engineering strategy for developing COF-based NF membranes, demonstrating great potential for the effective removal of ECs from wastewater.

药物等新兴污染物对水生环境和人类健康构成越来越大的威胁。因此，开发高性能纳滤膜以高效去除ECs是当务之急。在这项工作中，我们提出了一种在温和条件下制造新型共价有机框架（COF）基纳滤膜的可扩展和节能策略。该膜通过静电纺丝和随后的静电组装制备，由多孔PAN@TpPa支撑层和精确沉积的TpPa-SO3H选择层组成。我们采用了一种关键的界面工程方法，其中质子化的TpPa层间增强了层间的静电相互作用，从而形成了一个致密的带负电荷的界面，具有出色的长期稳定性。优化后的膜具有72 h的TpPa生长时间和30 mg的TpPa- so3h负载，双氯芬酸钠（DS）的截留率高达98.89%，透过率为16.79 L m−2 h−1·bar−1，优于商业NF膜。此外，PAN@TpPa/TpPa-SO3H复合膜具有显著的长期稳定性和优异的防污性能。分子动力学模拟结果表明，高分离性能是粒度筛分和Donnan排除法协同作用的结果。这项工作为开发基于cof的NF膜提供了一种温和且可扩展的界面工程策略，展示了有效去除废水中ECs的巨大潜力。

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引用次数: 0

Electrochemical impedance spectroscopy-assisted mass transfer model for supported liquid membranes in arbitrary degradation states 电化学阻抗谱辅助下任意降解状态下负载液膜的传质模型

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-01-14 DOI: 10.1016/j.memsci.2026.125164

Hiroki Fukuda, Jongho Lee

Supported liquid membranes (SLMs) allow for fast and selective recovery of valuable chemicals from wastewater by realizing the solvent extraction process in a compact membrane platform. Nevertheless, the degradation of SLM (i.e., gradual loss of the organic solvent from the membrane pores) inevitably alters the membrane’s recovery and selectivity over time. We present a comprehensive mass transfer model that captures the recovery and selectivity performance of SLMs at any stage of degradation. The model receives SLM structural information from in-situ electrochemical impedance spectroscopy (EIS) and describes (i) diffusion across the boundary layers, (ii) multicomponent transport through the solvent-embedded pores, and (iii) parallel diffusion through organic and aqueous phases. We prepared SLMs in intact, partially-degraded, and fully-degraded states, and conducted recovery experiments of medium-chain fatty acids (MCFAs) over short-chain counterparts as an exemplary case of SLM-based resource recovery. With an excellent match with the experiments, the model reveals that a high MCFA recovery is attainable when the solvent remains within the membrane pore, but the selectivity rapidly declines as aqueous pathways are formed across the pore. The model also delineates an optimal parameter map as a guidance for maximizing recovery and selectivity, and for timely management of the membrane operation.

支撑液膜（SLMs）通过在紧凑的膜平台上实现溶剂萃取过程，允许从废水中快速和选择性地回收有价值的化学物质。然而，随着时间的推移，SLM的降解（即从膜孔中逐渐失去有机溶剂）不可避免地改变了膜的恢复和选择性。我们提出了一个全面的传质模型，该模型捕获了slm在任何降解阶段的恢复和选择性性能。该模型从原位电化学阻抗谱（EIS）接收SLM结构信息，并描述(i)跨边界层的扩散，（ii）通过溶剂嵌入孔隙的多组分传输，以及（iii）通过有机相和水相的平行扩散。我们制备了完整、部分降解和完全降解状态的slm，并进行了中链脂肪酸（MCFAs）在短链上的回收实验，作为基于slm的资源回收的示例案例。该模型与实验结果吻合良好，表明当溶剂保持在膜孔内时，可以获得较高的MCFA回收率，但随着水通道在孔内形成，选择性迅速下降。该模型还描绘了一个最佳参数图，作为最大化回收率和选择性以及及时管理膜操作的指导。

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引用次数: 0

Machine-learning design V alloys with high hydrogen embrittlement resistance 机器学习设计抗氢脆的V合金

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-01-13 DOI: 10.1016/j.memsci.2026.125144

Liucheng Liu , Nanyang Wu , Zhaohui Pan , Zhiyong Xu , Shengfeng Zhou

The first principles calculations with machine learning are combined to predict hydrogen solution energies in V-based alloys across different alloying species and local interstitial environments. Three physically interpretable descriptors, atomic radius mismatch, interstitial-site alloy fraction, and electronegativity, govern the hydrogen solution energetics and enable composition-dependent screening of alloying elements. The model identifies Cr, Mn, Fe, Co, Cu, Ru, Rh, Ir and Au as beneficial additives for reducing hydrogen absorption. Experimental validation shows good agreement with the predicted trends. This work provides a mechanistic and data-driven strategy for designing hydrogen-resistant V alloys.

将第一性原理计算与机器学习相结合，预测v基合金在不同合金种类和局部间隙环境中的氢溶液能。三个物理上可解释的描述符，原子半径失配，间隙位置合金分数和电负性，控制着氢溶液的能量学，并使合金元素的成分依赖筛选成为可能。该模型确定Cr、Mn、Fe、Co、Cu、Ru、Rh、Ir和Au是减少氢吸收的有益添加剂。实验验证结果与预测趋势吻合较好。这项工作为设计抗氢V合金提供了一种机制和数据驱动的策略。

引用次数: 0

Hydraulic permeability of bijel-derived porous materials: Morphological origins of size-dominated flow bijel衍生多孔材料的水力渗透性：粒径主导流动的形态起源

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-01-13 DOI: 10.1016/j.memsci.2026.125160

Luciano Groisman , Todd J. Thorson , Elliot L. Botvinick , Ali Mohraz

We combine experiments and computational fluid dynamics to analyze in detail the hydraulic permeability of a new class of architected porous media called bijel-templated materials (BTMs), which are derived from the arrested spinodal decomposition of particle-stabilized emulsions. We benchmark our findings against particle-templated materials (PTMs), a class of porous media commonly used in technological applications. Despite similar pore sizes and porosities, BTMs exhibit up to a five-fold higher geometric throughput factor, reflecting their continuous, minimally constricting channel network. The decomposition of permeability into a size term and a topology-sensitive multiplier reveals that BTMs are size-dominated: once the characteristic channel size or radius of curvature is defined, permeability scales predictably without incurring additional topological penalties. By contrast, PTMs depend on both size and topology: although permeability scales with pore size, it is further modulated by porosity, constrictivity, and tortuosity arising from microstructural bottlenecks, which must be considered independently of pore size. Furthermore, BTMs preserve percolation at significantly lower porosities than PTMs, highlighting their inherent resilience in connectivity and demonstrating how spinodal bicontinuity enables efficient fluid transport. These findings reveal that bijel-derived architectures define a distinct morphological regime of flow, in which hydraulic permeability is governed by curvature and bicontinuity rather than traditional porosity–tortuosity scaling.

本文将实验与计算流体力学相结合，详细分析了一类名为bijel-templated materials （BTMs）的新型结构多孔介质的水力渗透性。我们将我们的发现与颗粒模板材料（ptm）进行对比，ptm是一类通常用于技术应用的多孔介质。尽管孔径和孔隙率相似，但btm的几何吞吐系数高达5倍，这反映了其连续的、最小收缩的通道网络。渗透率分解为尺寸项和拓扑敏感乘数表明，btm是尺寸主导的：一旦定义了特征通道尺寸或曲率半径，渗透率可预测地缩放，而不会产生额外的拓扑惩罚。相比之下，ptm依赖于尺寸和拓扑结构：尽管渗透率随孔隙尺寸而变化，但微观结构瓶颈引起的孔隙度、收缩性和扭曲度进一步调节了渗透率，这些因素必须独立于孔隙尺寸进行考虑。此外，btm比ptm在更低的孔隙度下保持渗透，突出了它们在连通性方面的固有弹性，并证明了独立双连续性如何实现有效的流体输送。这些发现表明，bijel衍生的体系结构定义了一种独特的流体形态体系，其中水力渗透率由曲率和双连续性控制，而不是传统的孔隙度-弯曲度尺度。

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引用次数: 0

Construction of continuous proton channels via a 2D sulfonated COF for in-situ ionic self-crosslinked membranes in superior direct methanol fuel cell 基于二维磺化COF的原位离子自交联膜连续质子通道的构建

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-01-13 DOI: 10.1016/j.memsci.2026.125162

Zaijun Gan , Guoliang Liu , Ting Qu , Jie Wang , Meiling Fan , Xuxing Chen , Hai Liu , Ying Ou

High-performance proton exchange membranes (PEMs) that simultaneously possess high proton conductivity and low methanol permeability is crucial for direct methanol fuel cell (DMFCs) applications. Herein, a sulfonated covalent organic framework (COF–SO₃H) was synthesized and incorporated into a sulfonated polybenzimidazole (SPBI) matrix to fabricate composite proton exchange membranes. Acid-base interactions between sulfonic acid and protonated imidazole groups under acidic conditions to form ionic self-crosslinked structure, effectively reducing free volume size to suppress methanol permeability. The hydrophilic COF–SO₃H improved water uptake and facilitated continuous proton-conducting pathways through its two-dimensional structure. The optimized membrane exhibited a high proton conductivity of 106.13 mS cm⁻¹ at 80^oC. Furthermore, the SPBI/COF–SO₃H-1.5 % membrane with thickness of 10 μm achieved a low methanol crossover current density of 187.10 mA cm⁻² and outstanding power density of 152.67 mW cm⁻² under 2 M methanol concentration, significantly outperforming those of commercialized Nafion 115. This study presents a promising strategy for high-performance PEMs in DMFCs system.

高性能质子交换膜（PEMs）同时具有高质子导电性和低甲醇渗透率，是直接甲醇燃料电池（dmfc）应用的关键。本文合成了磺化共价有机骨架（COF-SO3H），并将其掺入磺化聚苯并咪唑（SPBI）基质中制备复合质子交换膜。磺酸与质子化咪唑基团在酸性条件下酸碱相互作用形成离子自交联结构，有效减小自由体积大小，抑制甲醇的渗透性。亲水性COF-SO3H通过其二维结构提高了吸水性，促进了连续的质子传导途径。优化后的膜在80℃时具有106.13 mS cm−1的高质子电导率。此外，厚度为10 μm的SPBI/ cof - so3h - 1.5%膜在2 M甲醇浓度下的甲醇交叉电流密度为187.10 mA cm - 2，功率密度为152.67 mW cm - 2，显著优于商品化的Nafion 115膜。本研究为dmfc系统的高性能PEMs提供了一种有前景的策略。

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引用次数: 0

Dual-function molecular regulator enables simultaneous enhancement of permeability and selectivity in nanofiltration membranes 双重功能分子调节剂使纳滤膜的渗透性和选择性同时增强

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-01-13 DOI: 10.1016/j.memsci.2026.125161

Bo Zhu , Zhengzhi Liu , Tao Zhang , Xiaoqin Tang , Lelin Zeng , Jianxian Zeng , Zhiwei Xu , Tiefan Huang , Bart Van der Bruggen , Hu Zhou

Thin-film composite (TFC) nanofiltration (NF) membranes stand as a 21st-century landmark for water resource recovery, yet the inherent permeability-selectivity trade-off limits their performance. This work introduces a facile yet effective dual-functional strategy to modulate the structure of the active layer. By tailoring the spatial distribution of amine monomers via a molecular regulator, which also serves as functional building blocks, both permeability and selectivity can be enhanced simultaneously. The strong non-covalent interactions between amino-benzenesulfonate salt (ABS) and piperazine (PIP) effectively restrict the free diffusion of PIP molecules, resulting in a more uniform distribution at the water–oil interface. Concurrently, the polar sulfonate groups of ABS, acting as intrinsic functional groups, are enriched at the interface, further enabling a more controllable polymerization process. The resulting TFC NF membrane exhibits ultrahigh surface hydrophilicity, strong negative surface charge, and narrow pore size distribution. It achieves a competitive water permeability of 25.2 LMH·bar⁻¹ and an exceptional Cl⁻/SO₄²⁻ selectivity (S: 87.89), with excellent long-term stability, outperforming previously reported polyamide NF membranes. This study advances rational design of high-performance NF membranes, offering a promising route for safe drinking water production.

薄膜复合（TFC）纳滤（NF）膜是21世纪水资源回收的里程碑，但固有的渗透性和选择性权衡限制了它们的性能。这项工作引入了一种简单而有效的双功能策略来调制有源层的结构。通过分子调节剂调整胺单体的空间分布，可以同时增强渗透性和选择性。氨基苯磺酸盐（ABS）与哌嗪（PIP）之间强烈的非共价相互作用有效地限制了PIP分子的自由扩散，使其在水-油界面处的分布更加均匀。同时，ABS的极性磺酸基作为本征官能团在界面处富集，进一步使聚合过程更加可控。制备的TFC纳滤膜具有超高的表面亲水性、强的表面负电荷和窄的孔径分布。它具有25.2 LMH·bar - 1的透水性和卓越的Cl - /SO42 -选择性（S: 87.89），具有优异的长期稳定性，优于先前报道的聚酰胺NF膜。本研究提出了高性能纳滤膜的合理设计，为安全饮用水生产提供了一条有前途的途径。

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引用次数: 0

“Fingerprint” of polymer for gas transport characteristics on the example of novel CO2-selective polynorbornene bearing highly polar side substituents 以含高极性侧取代基的新型co2选择性聚降冰片烯为例，聚合物气体输运特征的“指纹图谱”

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-01-12 DOI: 10.1016/j.memsci.2026.125152

Diana A. Sadykova, Dmitry A. Alentiev, Dmitry A. Tsarev, Roman Yu. Nikiforov, Victoria E. Ryzhikh, Nikolay A. Belov, Alexander Yu. Alentiev, Maxim V. Bermeshev, Anton L. Maximov

High-molecular-weight metathesis polynorbornene containing triethylene glycol fragments linked to the main chain through a carboxyl group has been synthesized for the first time. Gas-transport parameters of the polynorbornene were investigated for the extended set of gases: H₂, He, Ar, N₂, O₂, CO₂, CH₄, C₂H₂, C₂H₄, C₂H₆, C₃H₆, C₃H₈, CHF₃, CH₂F₂, CF₂Cl₂, CHF₂Cl, and NH₃. The gas-transport properties of the polymer are stable during six months. The increased permeability coefficients of CO₂, ethylene, acetylene, propylene, freons and ammonia are determined by their high solubility coefficients. The point for the polymer synthesized in the work is located higher than the 2008 Robeson upper bound in the selectivity-permeability diagram for CO₂/N₂ gas pair, which arises from the specific interaction of CO₂ with the polymer. The analysis of specific interactions was carried out using correlation ratios of diffusion coefficients with the effective cross-section of gas molecules and solubility coefficients with Abraham parameters. Nonspecific and specific solubility and diffusion coefficients and their ratios for CO₂, acetylene, ethylene, propylene, freons and ammonia were obtained. Based on the data obtained, the Abraham coefficients for the synthesized polymer (the “fingerprint” of the polymer) are calculated, which make it possible to estimate the solubility coefficient of gas or vapor for which the Abraham parameters are tabulated. The diffusion coefficients of gas or vapor for which the values of the effective cross-section of the molecule are tabulated can be estimated using the Teplyakov-Meares model, and, consequently, the permeability coefficient can be calculated. The proposed model has significant potential, however, given that the values obtained are calculated, the predicted gas transport parameters of the polymer are estimates.

首次合成了含有三甘醇片段通过羧基与主链连接的高分子量甲基化聚降冰片烯。研究了聚降冰片烯在H2、He、Ar、N2、O2、CO2、CH4、C2H2、C2H4、C2H6、C3H6、C3H8、CHF3、CH2F2、CF2Cl2、CHF2Cl和NH3等气体下的输运参数。聚合物的气体输运性能在六个月内保持稳定。二氧化碳、乙烯、乙炔、丙烯、氟利昂和氨的渗透性系数增加是由它们的高溶解度系数决定的。在CO2/N2气体对的选择性-渗透率图中，合成的聚合物的点位于2008年的罗伯逊上界之上，这是由于CO2与聚合物的特定相互作用造成的。利用扩散系数与气体分子有效截面的相关比、溶解度系数与亚伯拉罕参数的相关比分析了具体的相互作用。得到了CO2、乙炔、乙烯、丙烯、氟利昂和氨的非特异性和特异性溶解度和扩散系数及其比值。根据获得的数据，计算了合成聚合物的亚伯拉罕系数（聚合物的“指纹”），从而可以估计出亚伯拉罕参数表所示的气体或蒸汽的溶解度系数。用Teplyakov-Meares模型可以估计出分子有效截面值的气体或蒸汽的扩散系数，从而可以计算出渗透系数。所提出的模型具有很大的潜力，然而，考虑到计算得到的值，预测的聚合物气体输运参数是估计的。

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