Science Advances
·
2025
·Vol. 11
·期 48
·
IF 12.5
Kaifang Wang,Zhongtai Zhu,Yuqi Liu,Weiran Zheng,Ziyi Yuan,Zhihong Lin,Raphael Semiat,Lu Shao,Xuezhong He
Carbon membranes are emerging as a versatile platform for the selective separation of gas mixtures with similar molecular sizes. Here, a high-performance carbon membrane is developed from an asymmetric, rigid copolyimide precursor via a precisely controlled carbonization process. Membranes carbonized at 800°C exhibit exceptional CO 2 separation performance, with CO 2 permeabilities up to 15,700 barrer and CO 2 /N 2 and CO 2 /CH 4 selectivities of 63 and 52, respectively—surpassing the 2019 upper bounds. Molecular dynamic simulations, in conjunction with in situ thermogravimetric analysis-mass spectroscopy and thermogravimetric analysis-Fourier transform infrared spectroscopy, reveal the evolution of a bimodal carbon matrix with micropores (7 to 20 angstroms) and ultramicropores (4 to 7 angstroms). Gas transport is dominated by synergistic adsorption-selective and molecular sieving mechanisms, enabling subangstrom discrimination between CO 2 and larger gases. This work demonstrates a facile, tunable strategy to engineer carbon membranes with outstanding CO 2 separation capabilities, offering previously unexplored opportunities for energy-efficient gas separation processes in industrial applications.
研究领域:
材料科学
·
膜技术
·
气体分离
·
碳材料
·
可持续能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiujuan Hao,Yukai Hu,Rijian Quan,Xiayu Xu,Jiayu Tian
This study systematically investigates the regulatory effect and underlying mechanism of hydroxyl (-OH) content within the polyamide (PA) layer of thin film composite (TFC) membranes on membrane performance and fouling behavior. For this purpose, -OH-rich cellulose nanocrystals (CNCs) were employed as in-situ -OH donors, with incorporation concentrations ranging from 0.05 to 0.4 wt% during interfacial polymerization. X-ray photoelectron spectroscopy (XPS) quantitative analysis revealed that the surface -OH content of TFC-CNC membranes with CNC concentrations ranging from 0.05 to 0.4 wt% was 4.21 %, 4.25 %, 4.42 %, and 4.45 %, respectively. These values were significantly higher than the 0.56 % surface -OH content of the TFC-control membrane. The water contact angles (WCA) of TFC-CNC membranes with CNC concentrations of 0.05 to 0.4 wt% were 54.8°, 42.5°, 31.0°, and 23.6°, respectively. These values were exhibited a significant reduction relative to the water contact angle (WCA) of the TFC-control membrane (63.7°). Increasing surface -OH content enhanced membrane hydrophilicity and significantly improved water flux. This flux enhancement stems from the formation of multiple hydrogen bonds between -OH groups and water molecules. Specifically, the TFC-CNC (0.4) membrane attains a water flux of 42.65 LMH, approximately 2.2 times that of the TFC-control membrane (19.02 LMH). Moreover, nanomaterial incorporation reduced the crosslinking density of the PA layer, increased pore size, and enhanced surface roughness. These changes collectively exacerbated membrane fouling. Nevertheless, surface -OH groups alleviated these adverse effects: their week chelation Ca 2+ bridging between the membrane surface and organic pollutants, while their excellent hydration properties effectively minimized pollutant adsorption. These synergistic effects enhanced the antifouling capacity of TFC-CNC membranes, with the TFC-CNC (0.4) membrane achieving a flux recovery ratio (FRR) of 83.33 % (29.38 % for the TFC-control membrane). This finding underscores the critical role of –OH groups in regulating TFC membrane performance.
研究领域:
材料科学
·
膜技术
·
环境工程
·
高分子化学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Ge Yang,Yaozuo Zhou,Mengling Sun,Lei Zhao,Hao Wu,Hailing Guo,Soryong Chae,Svetlana Mintova
The development of adsorptive membranes that combine high radionuclide removal efficiency with structural and radiation stability remains a major hurdle in aqueous separation materials. Herein, we present a novel interface-engineering strategy to fabricate covalently crosslinked zeolite–graphene oxide (GO) membranes. Specifically, NaOH-mediated in situ crystallization of EMT-type zeolite precursors within GO nanosheet assemblies concurrently induces formation of Si–O–C covalent linkages, thereby integrating the inorganic and carbon components at the molecular interface. The resulting membrane manifests a stabilized layered architecture, expanded interlayer spacing, and enhanced ion-accessible active sites while retaining GO's hydrophilicity. It exhibits high adsorption capacities toward Cs+ (199.0–224.4 mg g−1) and Sr2+ (290.6–302.8 mg g−1) ions, sustained operation across a wide pH range, and superior durability under γ-irradiation.
研究领域:
材料科学
·
环境工程
·
核化学
·
膜技术
·
吸附
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 12
·452
·
IF 2.8
Xiao Shujuan,Li Hao,Lu Xiaohui,Yu Shouwu
Emulsified oil has dynamic stability, and its harmless treatment has become a challenging problem worldwide. Membrane filtration technology has garnered significant attention in the field of oil-water separation due to its low cost, high efficiency, and environmental friendliness. In this study, NH 2 -CAU-1 was incorporated into a polyphenylsulfone (PPSU) matrix to fabricate superhydrophilic and antifouling mixed matrix membranes (MMMs) via the phase inversion method, which were subsequently used for the separation of several oil-in-water emulsions. By adjusting the NH 2 -CAU-1 loading capacity, the mechanical properties, wettability, separation performance, and antifouling properties of the MMMs were optimized. The results indicated that when the NH 2 -CAU-1 loading is 0.1 wt%, the MMMs exhibited superhydrophilicity (water contact angle is 4.2°) and underwater superoleophobicity (underwater oil contact angle is 153.4°), achieving a separation efficiency of over 99.55% for various oil-in-water emulsions, with an irreversible fouling rate of only 2.66%.
研究领域:
材料科学
·
环境工程
·
膜技术
·
分离科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Membranes
·
2025
·
IF 9.5
Xiumei Geng,Ruiying Xie,Xinxin Sun,Xiang Zhang,Xuerui Wang,Roberto Castro Muñoz,Meixia Shan,Yatao Zhang
The pure organic nature and solubility of calixarenes in organic solvents position them as prospective fillers for mixed matrix membranes (MMMs). This investigation incorporated two calixarene materials, C-propylpyrogallol[4]arene (PgC 3 ) and sulfonato-calix[6]arene (SCA6), into a 6FDA-TMPDA matrix to fabricate MMMs targeting C 3 H 6 /C 3 H 8 separation. The separation performance of two calixarenes based MMMs were investigated at various filler loadings. SCA6 was found to be a more suitable filler for 6FDA-TMPDA as its abundant -OH and -HSO 3 functional groups, which strengthened filler-matrix interfacial compatibility. The membrane containing 1 wt% SCA6 in 6FDA-TMPDA exhibited optimal performance, attaining the C 3 H 6 permeability of 69.3 Barrer and an ideal selectivity of 17.3, surpassing the polymeric upper limit. The PgC 3 /6FDA-TMPDA MMMs also displayed a marked selectivity enhancement from 7.1 to 18.9. Both 1 wt% SCA6/6FDA-TMPDA and 5 wt% PgC 3 /6FDA-TMPDA membranes demonstrated long-term stability up to 20 days. The excellent separation performance and operational stability of these MMMs offer a promising alternative for efficient C 3 H 6 /C 3 H 8 separation.
研究领域:
材料科学
·
膜技术
·
气体分离
·
聚合物纳米复合材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Jia Ding,Chao Fan,Yulong Li,Jian Zhang,Jiaxing Hu,Jianguo Wang
Citalopram is a widely employed antidepressant and commonly produced by intramolecular etherification of 5-cyanodiol with highly corrosive and toxic p -toluenesulfonyl chloride as co-reactant. In this work, citalopram was synthesized using a catalyst-membrane coupling reactor (CMCR) in the absence of p -toluenesulfonyl chloride. The CMCR comprised a solid acid resin catalyst (HND-2) and a polyvinyl alcohol (PVA) membrane supported on a polymeric hollow fiber to achieve in-situ water separation through vapor permeation. The results revealed that incorporating the PVA membrane increased the conversion of 5-cyanodiol hydrochloride and selectivity towards citalopram by approximately 9.2 % and 4.0 %, respectively. It was found that water adsorbed and confined on HND-2 catalyst created micro-environment for the dissociation of hydrogen ions and etherification reaction. The Karl Fischer titration revealed that vapor permeation by PVA membrane effectively and completely removed the generated water during the reaction, resulting in an improvement in catalytic performance. The PVA membrane also maintained its separation capacity in six reaction cycles, demonstrating a good reusability in CMCR for the etherification of 5-cyanodiol hydrochloride.
研究领域:
化学工程
·
有机合成
·
膜技术
·
催化化学
·
药物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Chao Luo,Tianpei Yi,Bin Du,Zhijie Yuan,Fusheng Pan,Zhongyi Jiang
Aromatic and alkane separation plays a vital role in naphtha steam cracking due to the low cracking reactivity of aromatic. Aromatic-friendly hybrid membrane-based pervaporation is recognized as an efficient separation technology attributed to its economy, simplicity, and eco-friendly. Thus, TpPa-SO 3 Ag, a two-dimension COF filler with great compatibility for Pebax, was designed with uniform anchoring of Ag + in pore, which was incorporated into Pebax to construct facilitated transport channel into Pebax-TpPa-SO 3 Ag membrane. By regulating TpPa-SO 3 Ag content, the optimal Pebax-TpPa-SO 3 Ag membrane (1.0 wt%) showed best pervaporation performance with permeation flux of 2.05 kg m −2 h −1 and separation factor of 6.26 over 168 h. Relying on the optimal formulation of flat sheet membrane, hollow fiber hybrid membrane was developed, whose permeation flux (0.43 kg m −2 h −1 ) and separation factor (7.25) was fully maintained during the 168 h continuous pervaporation process for toluene/ n -heptane mixture, opening an avenue for hollow fiber COF hybrid membrane-based pervaporation in the production of high-value petrochemical derivatives.
研究领域:
材料科学
·
膜技术
·
化学工程
·
分离科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·Vol. 60
·期 48
·25741-25761
·
IF 3.9
Gao Ningning,Pan Yucheng,Huang Wei,Xin Qingping,Zhang Min,Wu Jiaxin,Wu Dengdi,Wang Mengke,Ding Xiaoli,Lin Ligang,Zhang Yuzhong
Due to its benefits of low energy consumption, minimal environmental pollution, and simple operation, membrane technology is considered a carbon capture technology with extensive application possibilities. In this study, the ultraviolet cross-linking method is used to inhibit crystallization of polymers with a molecular weight of less than 1500 and enable polyethylene oxide (PEO) to form a rubbery polymer matrix. This approach avoids membrane separation defects and low CO 2 solubility caused by high crystallinity. The hydroxyl-rich surface of layered double hydroxide (LDH) is used to provide the CO 2 -philic site in the form of “docking station-like” by introducing amino groups with a strong affinity for CO 2 , and forming a dual facilitated transport channel through the nanosheet interlayer channel and the presence of bound water to strengthen the reaction mechanism of the membrane. Based on the coupling of solubility-diffusion and facilitated transport mechanisms, the optimal separation performance is achieved when the NH 2 -PDA-LDH doping is 0.4 wt%, with a CO 2 permeability of 572.4 Barrer and a selectivity of up to 60.5. The interlayer fast transport channels result in a maximum permeability of 3982 Barrer in the wet state. Graphical
研究领域:
材料科学
·
膜技术
·
碳捕集与封存
·
高分子化学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Fanduo Meng,Yong Wang,Shuai Gong,Feiyue Ge,Wenxin Yan,Xiaozhen Lu,Liping Qiu,Feihong Wang,Daliang Xu,Xuewu Zhu
Tailoring nanofiltration membranes capable of simultaneously achieving high water permeance, exceptional selectivity, and chlorine resistance for safe drinking water purification remains a critical challenge in membrane science. This study presents a sodium citrate (SC)-assisted interfacial polymerization strategy combined with oxalyl chloride (OC) grafting modification to address these limitations. By precisely regulating the selective acylation reaction between oxalyl chloride and residual amine groups within the polyamide active layer, the surface charge density and pore structure of the membrane were systematically tuned. The resulting active layer exhibited a dense, uniform nodular morphology, accompanied by enhanced surface hydrophilicity and electronegativity. The optimized membrane demonstrated a high water permeance of 20.7 L·m −2 ·h −1 ·bar −1 while maintaining a NOM/mineral separation selectivity of 47.6. Furthermore, the SC6-OC1 membrane exhibited superior antifouling performance and long-term stability. The reduction of chlorine-sensitive amine sites, coupled with reinforced inter-chain crosslinking, significantly improved chlorine resistance. This SC-OC strategy offers a mechanistic pathway to simultaneously enhance membrane selectivity and durability, providing a promising solution for NF membranes-based sustainable, high-performance drinking water purification.
研究领域:
材料科学
·
环境工程
·
膜技术
·
饮用水净化
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·10481
·
IF 15.7
Zhao Guangjin,Liu Haohao,Lan Chengyi,Liang Lijun,Dong Liangliang,Meng Hong,Elimelech Menachem
Industry-leading polyamide membranes are thin-film composites produced via interfacial polymerization (IP) at an alkane-water interface. However, the current fabrication method results in suboptimal membrane microstructure and compromised performance due to insufficient control of mass and heat transfer within the interfacial reaction zone. Furthermore, the fabrication process utilizes volatile alkane solvents, contributing to a significant environmental burden. Here, we report an IP strategy at an ionic liquid/water interface to synchronously achieve kinetic and thermodynamic control of the interfacial reaction, thereby optimizing the microstructure of polyamide membranes. The high viscosity and low volatility of the ionic liquid facilitate the integration of the industrial doctor blading technique into the IP process, enabling rapid, eco-friendly, and scalable polyamide membrane production. The resulting membrane exhibits an unprecedented combination of high pure water permeance (25.8 LMH/bar) and excellent salt (sodium sulfate) rejection (96.54%), surpassing the performance of commercial benchmark polyamide membranes. This facile fabrication strategy paves the way for the design and production of next-generation, high-performance thin-film composite membranes.
研究领域:
材料科学
·
膜技术
·
绿色化学
·
高分子工程
·
分离科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Qian Wang,Xiu-Ping Lu,Tian-Dan Lu,Tian-Zhi Jia,Yao-Hui Wang,Zheng-Zhong Zhou,Rong Xu
Bridged organosilicas hold significant potential for high-performance molecular separation membranes. However, the development of ultrathin, defect-free, and spatially uniform organosilica separation layers on porous substrates remains an ongoing challenge. In this study, a new strategy is proposed for fabricating organosilica membranes with graphene oxide (GO) as a functional interlayer, using an efficient ultrasonic atomization spray-coating technique. By optimizing the interlayer architecture and fabrication parameters, ultrathin BTESE-derived organosilica selective layers were successfully constructed on GO-coated polyacrylonitrile (PAN) nanofibrous substrates under mild processing conditions. The resulting composite membranes were evaluated for separation of organic dyes. The optimized membrane demonstrated high dye rejection (>96 %) and good long-term stability during continuous nanofiltration operation. This work not only presents a straightforward method for the production of high-quality organosilica composite membranes but also offers new insights into the design of high-performance nanofiltration materials.
研究领域:
材料科学
·
膜技术
·
纳滤技术
·
分离科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Chao Wang,Cheng Yi,Tengfei He,Peijuan Chu,Yue Yao,Lijia Liu,Chunhong Zhang
Nanofiltration (NF) membranes with high water flux and improved rejection of antibiotics and dyes are desired for mitigating the impact of water pollution on human health. Herein, a facile surface modification strategy was employed to restructure the selective layer of the interfacial polymerization (IP) between naringenin (Nar) and trimesoyl chloride (TMC) (the membrane fabricated by IP was recorded as the NTM membrane) by alendronate sodium (AS). Through AS amines react with residual acyl chlorides on the freshly formed Nar-TMC layer to form amide linkages, realizing the construction of high-performance NF membrane. The AS modification enabling the fabricated AS-NTM membrane demonstrated enhanced surface hydrophilicity, roughness, negatively charged density, and well-designed pores. The AS-NTM membrane thus exhibited improved water flux and removal performance of antibiotics and dyes. The AS-NTM membrane presented a removal rate of ≥98.0 % for the dyes (methyl orange, sunset yellow, reactive Orange 16, and reactive Blue19, respectively), and antibiotics (cefoperazone sodium, ceftriaxone sodium, cefuroxime sodium, cephalothin, ceftizoxime, respectively) with a water permeance of 8.6 ± 0.8 L m −2 h −1 bar −1 . The simple surface modification approach using hydrophilic and negatively charged commercial AS enabled the modulation of the physicochemical structure and filtration performance of NF membrane. This work demonstrates a potential method for fabricating high-performance NF membrane using readily available compounds.
研究领域:
环境科学
·
膜技术
·
水处理
·
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）