Journal of Membrane Science最新文献_第10页

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 : 2026-03-01 Epub 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

Low-cost image-based monitoring to assess spatial and temporal biofouling dynamics in high-pressure membranes 低成本的基于图像的监测，以评估高压膜的空间和时间生物污染动力学

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-03-01 Epub Date: 2025-12-30 DOI: 10.1016/j.memsci.2025.125114

A. Mitranescu, A. Steger, A. Sudjito, J.E. Drewes

Understanding the development of biofouling on the surface of reverse osmosis and nanofiltration membranes is crucial for a safe and reliable operation of membrane systems. Current monitoring techniques however either cannot account for detailed temporal or spatial fouling trends (e.g., feed channel pressure drop,

F C P D

) or involve elevated cost and manual data post-processing (e.g., optical coherence tomography). In order to complement existing methods, we developed a low-cost and easy-to-use optical system for biofouling monitoring based on a consumer-grade DSLR camera equipped with a macro lens and freely available post-processing software. Applying our system in accelerated biofouling tests, we demonstrated that it allows for visual detection of incipient biofouling and qualitative real-time assessment of spatial biofilm growth patterns. We calculated the Pixel Intensity Difference

Δ_{P I}

, a quantitative image-based proxy for biofouling, and demonstrated that it captures temporal biofouling dynamics, particularly the early biofilm growth that is hardly detected by

F C P D

. However, being limited to 2D top view planar images,

Δ_{P I}

only partially discerns 3D biofilm growth in later biofouling stages. Additionally, our optical system enabled quantitative spatial fouling characterization, from in-detail assessment of minute pixel clusters to comparison of magnitude and temporal trends of biofouling in feed channel subsections. Biofilm growth was found to be substantially stronger on the feed spacer than on the free membrane surface. We share technical information on our system (e.g., drawings, code) so that further research can benefit from this affordable and easy-to-use method for image-based biofouling investigation in lab-scale and full-scale settings.

了解反渗透和纳滤膜表面生物污染的发展对膜系统的安全可靠运行至关重要。然而，目前的监测技术要么不能解释详细的时间或空间污染趋势（例如，进气通道压降，FCPD），要么涉及成本较高和手动数据后处理（例如，光学相干断层扫描）。为了补充现有的方法，我们开发了一种低成本和易于使用的生物污垢监测光学系统，该系统基于配备微距镜头和免费后处理软件的消费级单反相机。将我们的系统应用于加速生物结垢测试中，我们证明了它可以视觉检测早期生物结垢，并对空间生物膜生长模式进行定性实时评估。我们计算了像素强度差ΔPI，这是一种定量的基于图像的生物污垢代理，并证明它捕获了时间生物污垢动态，特别是FCPD很难检测到的早期生物膜生长。然而，由于受限于2D俯视图平面图像，ΔPI只能部分识别后期生物污染阶段的3D生物膜生长。此外，我们的光学系统实现了定量的空间污垢表征，从微小像素簇的详细评估到饲料通道亚段生物污垢的大小和时间趋势的比较。生物膜在饲料间隔层上的生长明显强于在自由膜表面上的生长。我们在我们的系统上共享技术信息（例如，图纸，代码），以便进一步的研究可以从这种经济实惠且易于使用的方法中受益，用于实验室规模和全尺寸设置的基于图像的生物污垢调查。

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引用次数: 0

Modulating pore structure of cellulose-based nanofiltration membrane through solid phase keratinization of cellulose for highly efficient dye/salt separation 通过纤维素的固相角化作用调节纤维素基纳滤膜的孔结构，实现高效的染料/盐分离

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-03-01 Epub Date: 2025-12-15 DOI: 10.1016/j.memsci.2025.125061

Dong Wang , Leyuan Zhou , Jian Zhang , Lihui Chen , Yubin Hong , Yaling Lin , Liulian Huang

In this study, the pore structure of cellulose-based nanofiltration (NF) membrane was modulated through solid phase keratinization of cellulose for efficient separation of dyes and salt ions. Increasing dryness of cellulose-based membrane resulted in shrinking pore structure and smoothing membrane surface, in which the hydrogen bonding interactions between cellulose molecules would be enhanced due to the escape of free water. As a result, the loose cellulose-based NF membrane with tailored pore structure could be used to finely separate small active organic molecules. The membrane with 75 % dryness exhibited satisfactory rejection of anionic dyes with a molecular weight higher than 400 Da (Congo red:98.81 %), while the membrane with 95 % dryness was able to reject anionic dyes with a molecular weight lower than 400 Da (Methyl orange:81.17 %) and cationic dyes (Bengal rose red = 98.36 %, Methylene blue:85.77 %). In addition, the M-75 % membrane exhibited a strong ability in salt/dye separation (Congo red:98.81 %, Na₂SO₄:5.31 %, NaCl:3.58 %) and possessed comparable pure water flux (175.88 L m⁻² h⁻¹), excellent anti-fouling properties (flux recovery rate >96 %), and long-term stability (decline rates <5 % in 24 h). This study provided a simple method to prepare the loose cellulose-based NF membrane with efficient separation of dye/salt.

在这项研究中，通过纤维素的固相角化来调节纤维素基纳滤膜的孔结构，以有效分离染料和盐离子。纤维素基膜的干燥程度增加，导致膜孔结构收缩，膜表面光滑，其中自由水的逸出会增强纤维素分子之间的氢键相互作用。因此，具有定制孔结构的松散纤维素基纳滤膜可用于精细分离小活性有机分子。干燥度为75%的膜对分子量大于400 Da的阴离子染料（刚果红：98.81%）的去除率较好，而干燥度为95%的膜对分子量小于400 Da的阴离子染料（甲基橙：81.17%）和阳离子染料（孟加拉玫瑰红：98.36%，亚甲基蓝：85.77%）的去除率较好。此外，m - 75%膜具有较强的盐/染料分离能力（刚刚红：98.81%,na2so4: 5.31%, NaCl: 3.58%），具有相当的纯水通量（175.88 L m−2 h−1），优异的抗污染性能（通量回收率>； 96%）和长期稳定性（24 h内下降率<； 5%）。本研究提供了一种简单的方法来制备可有效分离染料/盐的松散纤维素基纳滤膜。

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引用次数: 0

Effect of water-holding capacity, conductivity under relative humidity conditions, and counterions of anion exchange membranes on electrochemical CO2 reduction performance and durability 持水量、相对湿度条件下的电导率和阴离子交换膜的反离子对电化学CO2还原性能和耐久性的影响

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-03-01 Epub Date: 2025-12-22 DOI: 10.1016/j.memsci.2025.125086

Kyungwhan Min , Kiyoung Chang , Wooseok Lee , Hyeonjun Maeng , Jungmin Kim , Dongil Lee , Tae-Hyun Kim

Extensive research on various cell components is essential for improving the efficiency of CO₂-to-CO conversion via the anion exchange membrane (AEM)-based electrochemical CO₂ reduction reaction (CO₂RR). However, membranes serving as an electrolyte between the anode and cathode have rarely been explored. In this study, we investigated and optimized the major properties of AEMs that affect CO₂RR cell performance and durability. To this end, the crosslinking degree of the polymers used in the CO₂RR cell test was adjusted to control the water uptake, mechanical properties, ion-conducting properties, and water-holding capacity of the AEMs. In particular, the influence of AEM counterions on CO₂RR performance and durability was elucidated by comparing structural changes before and after the cell test. Finally, the optimized AEM achieved a cell performance of 2.04 V at 200 mA cm⁻² and exhibited a stable long-term durability of over 60 h in the CO₂RR cell test, marking significant improvements over reported and commercial AEMs. The results confirm that the hydroxide conductivity under relative humidity conditions and water-holding capacity of the HCO₃⁻-form AEMs contribute to CO₂RR performance and durability, indicating that the CO₂RR cell test strongly depends on the cathodic environment.

为了通过阴离子交换膜（AEM）电化学CO2还原反应（CO2RR）提高CO2到co的转化效率，对各种电池组分进行广泛的研究是必不可少的。然而，作为阳极和阴极之间电解质的膜很少被探索。在本研究中，我们研究并优化了影响CO2RR电池性能和耐久性的AEMs的主要特性。为此，调整CO2RR电池测试中使用的聚合物的交联度，以控制AEMs的吸水率、机械性能、离子传导性能和持水量。通过比较电池测试前后的结构变化，特别阐明了AEM反离子对CO2RR性能和耐久性的影响。最后，优化后的AEM在200 mA cm - 2下的电池性能为2.04 V，并且在CO2RR电池测试中表现出超过60小时的稳定长期耐用性，与报道和商业AEM相比有了显着改善。结果证实，相对湿度条件下氢氧化物电导率和HCO3 -形式AEMs的持水能力对CO2RR性能和耐久性有贡献，表明CO2RR电池测试与阴极环境有很大关系。

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引用次数: 0

Proton permselective phosphate group-grafted polybenzimidazole membrane with hydrophilic-hydrophobic bicontinuous microphase separation structure for acid recovery 具有亲疏水双连续微相分离结构的质子过选择磷酸基接枝聚苯并咪唑酸回收膜

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-03-01 Epub Date: 2025-12-22 DOI: 10.1016/j.memsci.2025.125085

Zhaozan Xu , Yuhan Jia , Rongfeng Li , Huanhuan Niu , Yaxuan Wang , Wen Li , Yeqiu Xu , Haichun Dang , Kang Geng , Nanwen Li

The fabrication of proton permselective membrane for acid recovery via electrodialysis faces the challenge of trade-off effect between the proton permeability and permselectivity. Herein, the phosphate group was chosen as the cation-exchange group and grafted to two kinds of rigid polybenzimidazoles (named as mPBI-P and NPBI-P) to fabricate the proton permselective membrane. A hydrophilic-hydrophobic bicontinuous microphase separation structure was constructed in the membrane and the hydrophilic phase containing phosphate groups, acid-base pairs and positively charged imidazoliums played the role of continuous proton-selective transport channels. The narrow continuous hydrophobic phase and dispersed hydrophobic nodes formed the tough and rigid framework which endowed the membrane with outstanding dimensional stability by suppressing the swelling of hydrophilic phase. The phosphate group functionalization of mPBI and NPBI not only reduced the acid uptake, swelling degree and membrane area resistance, but also enhanced the proton permeability and permselectivity simultaneously, breaking the trade-off effect. Compared with mPBI-P membrane, NPBI-P membrane showed a hydrophilic-hydrophobic bicontinuous microphase separation structure in larger extent. The NPBI-P membrane showed both high H⁺ permeation flux (4.67 mol m⁻² h⁻¹) and permselectivity (887), but a quite low swelling degree (2.6 %) in dilute H₂SO₄, which exhibited obvious advantages in both separation property and dimensional stability over the previously reported polymeric membranes. Therefore, the adjustment of pendant acid groups in rigid polymer and microphase separation structure in the membrane provides a strategy for the fabrication of a proton permselective membrane.

电渗析法制备酸回收用质子透选择膜面临着质子透性与透选择性权衡的挑战。本文选择磷酸基作为阳离子交换基，接枝到两种刚性多苯并咪唑（mPBI-P和NPBI-P）上，制备质子透选择膜。在膜内构建了亲疏水双连续微相分离结构，含磷酸基、酸碱对和带正电的咪唑的亲水相起到了连续的质子选择输运通道的作用。窄的连续疏水相和分散的疏水节点形成坚韧刚性的骨架，通过抑制亲水性相的膨胀使膜具有突出的尺寸稳定性。磷酸基功能化的mPBI和NPBI不仅降低了吸酸量、溶胀度和膜面积阻力，而且同时提高了质子渗透率和过电选择性，打破了权衡效应。与mPBI-P膜相比，NPBI-P膜在更大程度上表现为亲疏水双连续微相分离结构。NPBI-P膜具有较高的H+渗透通量（4.67 mol m−2 H−1）和超选择性（887），但在稀H2SO4中的溶胀度很低（2.6%），在分离性能和尺寸稳定性方面均优于已有报道的聚合物膜。因此，调整刚性聚合物中悬垂酸基和膜中的微相分离结构为制备质子透选择膜提供了一种策略。

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引用次数: 0

Energy transduction and water filtration by piezoelectric PVDF membranes 压电PVDF膜的能量传导与水过滤

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-03-01 Epub Date: 2025-12-04 DOI: 10.1016/j.memsci.2025.125023

Qiuyueming Zhou , Juan Li , Qian Wang , Hao Zhang , Xinhai Zhang , Zhaoliang Cui , Weixing Li

Piezoelectric poly(vinylidene fluoride) (PVDF) membranes show significant potential for combined water treatment and energy harvesting, but the quantitative link between piezoelectric coefficient (d₃₃) and electrical/antifouling properties is still unclear. Addressing this gap, this study systematically investigated piezoelectric PVDF membranes with controlled d₃₃ values (0–20 pC/N), establishing the first quantitative d₃₃-dependent structure-performance relationship for energy conversion and membrane separation. Electrical tests showed increased d₃₃ enhances underwater output voltage and significantly improves acoustic response above 80 kHz. Fouling studies revealed higher d₃₃ strengthens surface negative charge (e.g., −55 mV zeta potential at 15 pC/N) and dominated eversible fouling resistance. Consequently, piezoelectric PVDF membranes achieved excellent separation (humic acid rejection above 90.7 %, Bovine serum albumin rejection about 100 %, dextran molecular cut-off about 71.3 kDa, and natural organic matter of actual surface water rejection higher than 77 %), coupled with high flux recovery (90 % humic acid, 71.1 % surface water). This work provides the first systematic assessment of d₃₃-dependent energy conversion and antifouling performance, offering a theoretical basis for designing efficient piezoelectric membranes.

压电聚偏氟乙烯（PVDF）膜在水处理和能量收集方面显示出巨大的潜力，但压电系数（d33）与电气/防污性能之间的定量联系尚不清楚。为了解决这一问题，本研究系统地研究了可控d33值（0-20 pC/N）的压电PVDF膜，首次建立了能量转换和膜分离中d33依赖的定量结构-性能关系。电学测试表明，增加d33可提高水下输出电压，显著改善80 kHz以上的声响应。污垢研究表明，较高的d33增强了表面负电荷（例如，在15 pC/N时- 55 mV zeta电位），并主导了可逆的污垢阻力。因此，压电PVDF膜具有优异的分离性能（腐植酸截留率在90.7%以上，牛血清白蛋白截留率约为100%，葡聚糖分子截留率约为71.3 kDa，实际地表水的天然有机物截留率高于77%），并具有较高的通量回收率（腐植酸90%，地表水71.1%）。这项工作首次系统地评估了d33依赖的能量转换和防污性能，为设计高效的压电膜提供了理论基础。

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引用次数: 0

Peroxymonocarbonate activation via composite membrane for highly efficient micropollutant degradation and fouling mitigation 复合膜活化过氧单碳酸酯高效降解微污染物和减轻污染

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-03-01 Epub Date: 2025-12-17 DOI: 10.1016/j.memsci.2025.125080

Bo-Tao Zhang , Haoqi Yang , Zhuo Chen , Yu Yang , Juanjuan Zhao , Siying Du

The integration technologies of separation membranes with H₂O₂, persulfate or peroxymonosulfate suffer from unacceptable metal leakage and catalyst deactivation during long-term operation due to reduced pH values. Herein, peroxymonocarbonate (PMC) was activated by the bimetallic nanofibers functionalized polyvinylidene difluoride (Co–Cu/NFs@PVDF) membrane for effective micropollutant degradation. The Co–Cu/NFs@PVDF activated PMC system outperformed its counterparts (monometallic membranes and other peroxide systems) in terms of a higher degradation efficiency and much lower metal leakage, which could be ascribed to bimetallic synergistic effects, bicarbonate buffering and diverse selective reactive species. This PMC based catalytical membrane system can achieve 100 % norfloxacin (NOR) removal in a retention time of 1.8 s with removal rate 2722 times faster than its corresponding heterogeneous batch system. The removals of NOR, bisphenol A and methylene blue were maintained at >99.6 % for 50 h continuous-flow operation at a high flux up to 128.1 L m⁻² h⁻¹. The PMC based catalytical membrane system demonstrated high anti-interference capabilities toward coexisting substances and efficient NOR removal (>97.9 %) from different actual water matrices, including groundwater, river and reclaimed water. Four reactive species synergistically contributed to NOR degradation and singlet oxygen played the primary role. PMC alleviated the decline in normalized fluxes by 36.2 %, 12.1 % and 34.2 % in the presence of humic acid, sodium alginate and bovine serum albumin, respectively. Four possible degradation pathways of NOR were proposed based on the fifteen intermediate identifications. The pharmacophores of all final products were destroyed, which could lower the risk of resistance gene formation. This strategy of coupling PMC with catalytic membrane system provides a novel and effective solution for the treatment of micropollutants in contaminated water.

分离膜与H2O2、过硫酸盐或过氧单硫酸盐的集成技术在长期运行中由于pH值降低而导致不可接受的金属泄漏和催化剂失活。本文研究了双金属纳米纤维功能化聚偏氟乙烯（Co-Cu /NFs@PVDF）膜对过氧一碳酸酯（PMC）的有效降解。Co-Cu /NFs@PVDF活化的PMC系统在更高的降解效率和更低的金属泄漏方面优于同类（单金属膜和其他过氧化物系统），这可能归因于双金属协同效应、碳酸氢盐缓冲和多种选择性反应物质。该PMC催化膜体系在1.8 s的停留时间内可达到100%的诺氟沙星（NOR）去除率，去除率比相应的非均相批处理体系快2722倍。在128.1 L m−2 h−1的高通量下连续运行50 h，硝态氮、双酚A和亚甲基蓝的去除率保持在99.6%。基于PMC的催化膜系统对共存物质具有较高的抗干扰能力，对不同实际水基质（包括地下水、河流和再生水）的NOR去除率达到97.9%。4种活性物质对NOR的降解有协同作用，单线态氧起主要作用。在腐植酸、海藻酸钠和牛血清白蛋白存在的情况下，PMC分别缓解了36.2%、12.1%和34.2%的归一化通量下降。基于15种中间鉴定，提出了4种可能的NOR降解途径。最终产物的药效团均被破坏，降低了抗性基因形成的风险。这种PMC与催化膜系统耦合的策略为污水中微量污染物的处理提供了一种新颖有效的解决方案。

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引用次数: 0

Stepwise growth for preparing highly loaded ZIF-8 ultrathin mixed matrix membranes towards efficient CO2/N2 separation 制备高负载ZIF-8超薄混合基质膜以实现高效CO2/N2分离

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-03-01 Epub Date: 2026-01-21 DOI: 10.1016/j.memsci.2026.125183

Peng Li , De Ao , Zhenjie Gu , Zhihua Qiao , Chongli Zhong

Metal-organic framework (MOF)-based membranes show promising potential for gas separation. However, it remains challenging to fully exploit the synergistic advantages of MOF crystals and polymers for fabricating highly loaded mixed matrix membranes (MMMs). Herein, a highly loaded ZIF-8 ultrathin MMM was prepared in situ via a stepwise growth strategy. Driven by the diffusion rate difference between the ligand and polyethyleneimine (PEI-600), preferentially formed ZIF-8 crystals served as the dominant phase, while the subsequently developed PEI-Zn²⁺ crosslinked network acted as an intergranular densification phase. Owing to the reduction in ZIF-8 crystal size induced by PEI, the MMMs exhibited an ultrathin thickness of only 160 nm. Furthermore, PEI enhanced the molecular sieving ability of crystals and membrane's CO₂/N₂ solubility selectivity by regulating the pore structure and membrane composition. With a high ZIF-8 loading of 84.3 %, the resulting MMMs demonstrated an excellent CO₂ permeance of 3177.4 GPU, accompanied by a CO₂/N₂ selectivity of 36.9. Notably, it maintained stable separation performance after bending and during long-term operation, showing good processability and industrial application potential. This strategy not only reinforces the advantages of MOF-based gas separation membranes but also provides a new paradigm for fabricating highly loaded MMMs.

金属有机骨架（MOF）基膜在气体分离方面具有广阔的应用前景。然而，如何充分利用MOF晶体和聚合物的协同优势来制造高负载混合基质膜（MMMs）仍然是一个挑战。本文通过逐步生长策略原位制备了高负载的ZIF-8超薄MMM。在配体与聚乙烯亚胺（PEI-600）扩散速率差异的驱动下，优先形成的ZIF-8晶体为主导相，随后形成的PEI-Zn2+交联网络为晶间致密相。由于PEI导致ZIF-8晶体尺寸减小，MMMs的超薄厚度仅为160 nm。此外，PEI通过调节孔结构和膜的组成，增强了晶体的分子筛分能力和膜的CO2/N2溶解度选择性。在ZIF-8负载量高达84.3%的情况下，所制得的MMMs具有优异的CO2透过率，为3177.4 GPU， CO2/N2选择性为36.9。值得注意的是，它在弯曲后和长期运行中保持稳定的分离性能，具有良好的可加工性和工业应用潜力。该策略不仅增强了mof基气体分离膜的优势，而且为制造高负载的mm材料提供了新的范例。

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引用次数: 0

Synergistic integration of cetylpyridinium bromide and covalent organic frameworks for Constructing Turing-type nanofiltration membranes with superior PFOA removal 十六烷基溴化吡啶与共价有机骨架协同集成构建具有优异PFOA去除率的图灵型纳滤膜

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science

Pub Date : 2026-03-01 Epub Date: 2026-01-11 DOI: 10.1016/j.memsci.2026.125154

Yuting Yang , Subo Xu , Yao Jiang , Weilong Song , Pin Zhao , Xinhua Wang

The pervasive environmental presence and recalcitrance of per- and polyfluoroalkyl substances (PFAS), particularly perfluorooctanoic acid (PFOA), necessitate the development of advanced water treatment technologies. Thin film composite nanofiltration (TFC-NF) membranes present a promising solution but are fundamentally constrained by the pervasive trade-off between permeability and selectivity. This study introduced a novel strategy to overcome this limitation by reconstructing the polyamide active layer with enhanced adsorption properties and a Turing structure. This was achieved via the synergistic co-introduction of the cationic surfactant cetylpyridinium bromide (CPB) and covalent organic frameworks (COFs), namely TpPa and F–COF, during the interfacial polymerization (IP) process. The optimized membrane demonstrated exceptional performance, achieving a PFOA rejection rate exceeding 99 % coupled with a high water permeance of 31.0 LMH·bar⁻¹, significantly surpassing the performance of commercial benchmarks such as NF90 and other membranes reported in the literature. CPB suppressed piperazine (PIP) diffusion by ∼41.5 %, while COFs enriched PIP and then mitigated diffusion fluctuations, promoting the formation of a thinner, denser, and more selective polyamide layer. Moreover, the enhanced PFOA removal was attributed to synergistic mechanisms including size exclusion (from the narrowed pore size), Donnan exclusion, and specific adsorption via fluorine–fluorine interactions provided by the COFs. This work provides a facile and effective strategy for fabricating high-performance NF membranes by leveraging the synergistic effect of surfactants and COFs to tailor the IP process, offering significant potential for the efficient removal of persistent organic pollutants in real-world applications.

全氟烷基和多氟烷基物质，特别是全氟辛酸，在环境中的普遍存在和顽固性，要求开发先进的水处理技术。薄膜复合纳滤（TFC-NF）膜是一种很有前途的解决方案，但从根本上受到渗透性和选择性之间普遍存在的权衡的限制。本研究提出了一种新的策略，通过重建具有增强吸附性能和图灵结构的聚酰胺活性层来克服这一限制。这是通过在界面聚合（IP）过程中协同引入阳离子表面活性剂十六烷基溴化吡啶（CPB）和共价有机框架（COFs），即TpPa和F-COF来实现的。优化后的膜表现出优异的性能，PFOA的去除率超过99%，透水性达到31.0 LMH·bar−1，显著超过了NF90等商业基准膜和文献中报道的其他膜的性能。CPB抑制哌嗪（PIP）扩散约41.5%，而COFs富集PIP，然后减轻扩散波动，促进形成更薄、更致密、更具选择性的聚酰胺层。此外，增强的PFOA去除归因于协同机制，包括尺寸排除（从缩小的孔径），Donnan排除，以及通过COFs提供的氟-氟相互作用进行特异性吸附。这项工作为利用表面活性剂和COFs的协同效应来定制IP工艺提供了一种简便有效的制造高性能NF膜的策略，为在实际应用中有效去除持久性有机污染物提供了巨大的潜力。

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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 : 2026-03-01 Epub 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