Carbon Capture Science & Technology
·
2026
·
IF 10.2
Chuang Liu,Wei Meng,Chao Hu,Duozheng Ma,Wenhua Fu,Dianhua Liu,Zhendong Wang,Weimin Yang
Solid amine adsorbents offer a promising route for carbon capture, yet the performance is frequently limited by poor amine dispersion and slow CO 2 transport when loaded on conventional supports. Herein, we report a high-performance solid amine adsorbent based on a two-dimensional (2D) FER -type zeolite nanosheet, SCM-37, synthesized via a simplified direct route with a markedly increased external surface area and a high density of terminal silanol groups, which serves as a highly accessible platform for polyethyleneimine (PEI) functionalization. Subsequent modification with 1,2-butylene oxide (BO) optimizes the amine environment and enhances hydrophobicity. The optimized BO-PEI/SCM-37 composite exhibits enhanced CO 2 uptake under both dry and humid conditions, while maintaining over 97% of its initial capacity after repeated cycles. Fixed-bed breakthrough experiments further demonstrate prolonged CO 2 capture under both dilute (1 vol%) and simulated flue gas (15 vol%) conditions. In situ DRIFTS and CO 2 -TPD reveal that the open nanosheet architecture promotes uniform PEI dispersion and efficient ammonium carbamate species, thereby improving both adsorption capacity and cyclic stability. These results establish readily synthesized 2D zeolite nanosheets as scalable supports for high performance amine-functionalized CO 2 capture across realistic operating conditions.
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DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Wenbiao Zheng,Mingfeng Yu,Sujuan Yang,Licong Meng,Yonghe Xiu,Yifan Liu,Hanhui Lei,Terence Xiaoteng Liu,Zhanhui Yuan,Liwei Wang
Membrane separation is an important separation and purification technology, membrane materials are the key to membrane separation technology, and the rapid development of two-dimensional materials in recent years has brought new opportunities for membrane separation technology. Graphene oxide (GO) is a hydrophilic two-dimensional material, and its unique physical and chemical structure and properties give it the potential to become a high-performance separation membrane; however, the instability limits its application. In this study, a two-dimensional material, graphite-phase carbon nitride (g-C3N4), was integrated into graphene oxide (GO) to address the challenges associated with its practical applications. This modification not only endows the material with more advantageous properties as a membrane but also introduces a heterogeneous structure that bolsters the composite membrane’s stability. This structure also enhances the permeability and selectivity of the membrane, leading to impressive results in self-driven permeation tests and staggered-flow filtration tests under applied pressure. Following additional surface charge modifications, the composite membrane demonstrated a separation efficiency of approximately 90.4% in permeation tests and an impressive separation efficiency of 63.8% in filtration tests for binary mixed salt solutions. These results indicate a significant capability for mono- and divalent ion separation, suggesting promising potential for salt separation applications.
研究领域:
材料科学
·
膜分离技术
·
化学工程
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 32
·47844
·
IF 2.188
Jingqian Deng,Zuolong Liu,Zhongjie Du,Wei Zou,Chen Zhang
A polymer foam material with both the open-cell porous structure and the polyethylenemine (PEI)-grafted inner face was constructed for CO 2 capture. The porous poly(tert-butyl acrylate) foam was first prepared via a concentrated emulsion polymerization, and then the carboxyl groups were introduced on the interface of porous polymer after the hydrolysis reaction. Subsequently, the surface of the foam was grafted with PEI, and finally the PEI-grafted porous polymer foam designed as a CO 2 capture material was obtained. The structures of the foams were characterized by infrared spectroscopy, EDS, and SEM. The CO 2 adsorption properties were measured by adsorption/desorption cycles. As a result, the polymer foam contained a large number of amine groups (13.9 wt % N), and therefore possessed a high CO 2 adsorption capacity (5.91 mmol g −1 at 40°C and 100 kPa). In addition, they also exhibited high CO 2 adsorption rate, good selectivity for CO 2 -N 2 separation, and good stability according to CO 2 cyclic adsorption/desorption test. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47844.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2025
·
IF 2.3
Chungang Yuan,Zeyu Luo,Chunjiang Liu,Junhou Zhang,Liwei Zheng,Xiaoying Ma,Yujue Wang,Shiwei Guo
Solvent post-treatment is an effective strategy for regulating polyamide nanofiltration membranes. However, the regulatory mechanism behind this process requires further supplementation and improvement. In this study, different polar solvents (polarity order: acetonitrile > methanol > ethanol > acetone > n-butanol > n-hexane) were used for post-treatment of PEI nano-filtration membranes to compare and analyze the influence of solvent post-treatment on the performance of PEI nano-filtration membranes (flux, salt and heavy metal retention). Combined with the comprehensive physicochemical characterization (SEM, FTIR, XPS, contact angle), the regulatory mechanisms of different solvent post-treatments on PEI nanofiltration membranes were analyzed and summarized. The results revealed that the effect of solvent post-treatment on PEI-TMC polyamide is different from that of the MPD and PIP systems, possibly due to the larger molecular weight and acyclic molecular chain structure of PEI. Moreover, the solvent post-treatment mainly modulates the polyamide structure through two mechanisms: the swelling effect and the miscibility-promoted further reaction or hydrolysis. The former is the primary mechanism that determines the changes in separation properties. And the chemical structure of the polyamide surface is primarily influenced by the mutual dissolution promoted reaction or hydrolysis. This study improves the understanding of solvent post-treatment of interfacial polymerization and provides inspiration for performance modulation of positively charged PEI NF membranes.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 38
·e52903
·
IF 3.057
Han Wang,Liang Feng,Jun Zeng,Lingmin Chen,An Chen,Maolin Liu,Jingang Xiong
Nanofiber is a kind of high-performance material, which has great applications. Among many preparation methods, centrifugal electrospinning combines the advantages of electrospinning and centrifugal spinning, with high yield and a wide range of application. But its influencing factors are numerous, the process is still immature, and unable to meet the needs of industrialization. Here, we design a set of centrifugal electrospinning equipment and its process, and explore the influence of rotor form on fiber formation. First, the structure and working principle of experimental equipment of centrifugal electrospinning are introduced. Then, the influence of two factors, the rotor shape and rotor material, on space electric field is studied through theoretical and simulation analysis. Finally, based on the designed equipment, the effects of different rotor forms on the fibers preparation of centrifugal electrospinning are studied. The results show that the fiber diameter of centrifugal electrospinning is greatly affected by the form of the rotor. By changing the surface shape of the rotor and the rotor material, the diameter of the fiber can be controlled. Experiments show that the average fiber diameter of the γ-shaped rotor is the smallest, and the fiber spun with ULTEM PEI 1010 material has the best overall performance.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Jiuqing Liu,Zhirong Chen,Meng Liu,Junying He,Chen Duan,Chen Cheng,Liandong Tang,Yan Li
The application of lithium‑sulfur batteries is restricted by issues like the shuttle of polysulfide , poor thermal stability, and low ionic conductivity , which are often thought to be solved by novel separators. Herein, a separator based on polyetherimide (PEI) with excellent electrolyte uptake was proposed by us. The mix of SiO 2 nanoparticles and polyvinyl pyrrolidone (PVP) greatly improved the chemical properties of the separator. The silicon-hydroxyl group (Si-OH) on the surface of SiO 2 interacts with the oxygen-containing group on the surface of PEI making the modified PEI separator possess good electrolyte affinity, lithium compatibility, low interface impedance and improved interface stability. The characterization results show that enrichment of SiO 2 increases the amorphous area of the separator, decreases the crystallinity and improves the ionic conductivity and liquid absorption rate of the separator. The prepared separator (added 4 wt% SiO 2 ) displays many merits such as high ionic conductivity (1.32 mS/cm), high liquid absorption rate (293 %), excellent thermal stability (shrinkage rate is <5 % at 180 °C for 30 min), and high initial specific capacity (498.6 mAh/g at 2C). Due to the simple preparation method, the separators prepared in this paper have a significant meaning in the research of high-safety and long-cycle lithium‑sulfur battery.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Chao Huang,Miao Sun,Ying Wang,Lixian Shi,Xuan Liu,Nantao Hu
Separation membranes based on graphene oxide (GO) have attracted much attention due to their good separation properties. But its instability in water and rejection of divalent salt ions is a problem that needs to be solved urgently. In this study, molybdenum disulfide (MoS 2 ) is intercalated into graphene oxide by adding polyethyleneimine (PEI) solution drop by drop for cross-linking, and then GO/MoS 2 /PEI composite membrane is prepared by vacuum filtration. As MoS 2 hydrophobicity increases frictionless water flow channels to improve water flux, PEI cross-linking improves membrane stability and rejection of divalent salt ions. The modified composite membrane has a high rejection of 94.8 % for Mg 2+ , and water flux is increased by 30 % relative to GO/PEI membrane. In addition, the rejection of the composite membrane to different salt solutions is investigated by MgCl 2 , MgSO 4 , NaCl and Na 2 SO 4 solutions, and the results obtained are, in order, R(MgCl 2 ) > R(MgSO 4 ) > R(NaCl) > R(Na 2 SO 4 ). This modified composite membrane has great potential for salt ion removal.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Yan Lingxiao,Feng Xiaojuan,Wang Hongyan,Chen Yu,Wang Lulu,Xue Song
High-performance polymeric separators are indispensable materials for advanced rechargeable lithium-ion batteries (LIBs). In general, separators must simultaneously possess the following qualifications: flame retardancy, mechanical strength, wettability, and ion conductivity. In this study, polyethylenimide (PEI), which is rich in amino groups, was grafted onto the surface of polyimide fibre membranes by impregnation, resulting in the preparation of PI-PEI composite separator. The grafting of PEI on PI nanofibres resulted in the bonding of fibres, which enhanced the stability of the pore structure and mechanical properties of the nanofibres. Furthermore, the number of polar groups on the surface of the PEI grafted by the PI separator increased, which enhanced the electrolyte affinity of the PEI-PI separator. The influence of PEI concentration on the properties of the separator, electrochemical properties, and cell performances was also discussed, and the optimal PEI concentration (4%PEI) was identified. The PI-4%PEI composite separator exhibited superior wettability, mechanical strength, flame retardancy, and minimal interface impedance. In particular, PI-4%PEI separators display superior capability (127.9 mAh·g −1 @5C) in comparison to PP separators (115.4 mAh·g −1 @5C). Furthermore, the cell employing the PI-4%PEI separator displays high cycling stability and discharge specific capacity over 100 cycles at 1C. Concurrently, the modified polyimide separator exhibits remarkable stability, ensuring that the lithium-ion battery can operate safely even under high temperature working conditions.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
CELLULOSE
·
2018
·Vol. 25
·期 8
·4757-4769
·
IF 3.809
Li Yunhua,Zhu Hongxiang,Zhang Cunzhi,Cheng Meixiao,He Hui
A novel PEI-grafted magnetic cellulose (Fe 3 O 4 /MCC-PEI) with high amino density was prepared by grafting PEI onto the surface of magnetic cellulose in NaOH/urea aqueous solvent. The embedding of Fe 3 O 4 into cellulose provided excellent magnetic responsiveness for recycling the adsorbent in the magnetic field. The adsorbent for Cr(VI) removal from aqueous solution overcame the disadvantages of adsorbent like difficult recycling, poor regeneration performance and low removal rate at low Cr(VI) concentration. Therefore, the as-prepared Fe 3 O 4 /MCC-PEI showed high Cr(VI) adsorption capacity (198.8 mg/g) which could achieve adsorption equilibrium within 10 min, and the removal rate could reach 100% at low Cr(VI) concentration (less than 1.0 mg/L), demonstrating that the high amino density (7.85 mmol/g) and magnetic responsiveness of the adsorbent can greatly promote adsorption capacity and removal efficiency. The adsorbent also showed promising regeneration performance, and the adsorption capacity remained above 96% after six cycles. Graphical
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DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2026
·Vol. 34
·期 5
·121
·
IF 5.6
Shan Chao,Liu Zhongying,Wu Shanshan,Qu Junjie,Mo Junhao,Sun Xiaoyi,Liu Chanjuan,Huang Xiaohua
In this work, polyethyleneimine (PEI)-functionalized multi-walled carbon nanotubes (PEI@MWCNTs) were synthesized by coating pristine MWCNTs with PEI. Subsequently, mixed matrix membranes (MMMs) containing various loadings of PEI@MWCNTs were fabricated by incorporating the aminated nanotubes into FFBA (a fluorinated copolyimide, synthesized from 6FDA, FPPAB, and BAMF) matrix. This modification strategy takes advantage of the low-diffusion-resistance tubular structure of MWCNTs to facilitate gas transport, while the abundant amino groups of PEI serve as active sites for CO 2 molecules. The PEI@MWCNTs/FFBA MMMs exhibited superior thermal stability compared with the pristine FFBA membrane. X-ray diffraction (XRD) analysis revealed that the incorporation of carbon nanotubes expanded the interchain spacing within the PI matrix, thereby increasing the free volume of the membrane. Gas permeation tests showed that, at a PEI@MWCNTs loading of 3 wt%, the CO 2 permeability increased by 74%, while the CO 2 /N 2 selectivity improved by 46%. These results indicate that the incorporation of PEI@MWCNTs enables simultaneous improvements in both gas permeability and selectivity, thus mitigating the conventional permeability–selectivity trade-off typically observed in polymer membranes. This work offers a novel and effective strategy to enhance interfacial interactions between dispersed nanomaterials and the PI matrix, showing great promise for practical gas separation applications.
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DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Yinyin Chen,Nana Liu,Qiuju Wu,Wei Wu,Wei Fan,Aimin Wu,Xianxiang Wang
To overcome the problem of poor water solubility of curcumin used for antibacterial purposes and the limitation that a single treatment method is difficult to achieve the expected therapeutic effect for drug-resistant bacteria, this study has developed a new type of composite material, Cur-PEI-Mn 3 O 4 (MPC). During the preparation of the composite material, the water solubility of curcumin (Cur) has been enhanced by modifying it with polyethyleneimine (PEI), and it has been combined with Mn 3 O 4 nanocylinders to improve the therapeutic effect. The experiment has proved that MPC can catalyze the production of reactive oxygen species (∙OH) from H 2 O 2 under slightly acidic conditions and consume glutathione (GSH). While in neutral conditions, when the concentration of MPC is 160 μg mL −1 , the clearance rate of ∙O 2 − can reach 80 %. The in vitro antibacterial experiments have shown that 1 mg/mL MPC + H 2 O 2 could significantly inhibit methicillin-resistant Staphylococcus aureus (MRSA) and Escherichia coli (with a survival rate of 20 %). The mechanism includes damaging the bacterial membrane structure, causing protein leakage, depleting GSH and generating ∙OH. In the MRSA-infected wound model, MPC, under the acidic microenvironment of the wound in the early stage, can catalyze the production of ∙OH from H 2 O 2 and consume GSH to destroy the bacterial biofilm. In the neutral environment during the later stage of wound healing, MPC can exert antioxidant effects, significantly promoting epithelial regeneration (increased expression of Masson and CD31, decreased expression of IL-6 and TNF-α), and accelerating wound healing. Therefore, the improved solubility component Cur in this complex, along with the Mn 3 O 4 component with multiple catalytic activities, can work together to resist drug-resistant bacteria and thereby heal wounds infected by MRSA.
研究领域:
材料科学
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纳米技术
·
抗菌治疗
·
伤口愈合
·
活性氧催化
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产品关联
DOI
高影响因子
Polymers
·
2017
·Vol. 9
·期 8
·362
·
IF 3.364
Qing-Ying Yu,Yu-Rong Zhan,Ji Zhang,Chao-Ran Luan,Bing Wang,Xiao-Qi Yu
Low molecular weight polyethylenimine (1800 Da, also referred to as oligoethylenimines, OEI) was modified with amino acids, including two aromatic amino acids (tryptophan, phenylalanine) and an aliphatic amino acid (leucine). The substitution degree of amino acids could be controlled by adjusting the feeding mole ratio of the reactants. Fluorescence spectroscopy and circular dichroism experiments demonstrated that the indole ring of tryptophan may intercalate into the DNA base pairs and contribute to efficient DNA condensation. In vitro gene expression results revealed that the modified OEIs (OEI-AAs) may provide higher transfection efficiency even than high molecular weight polyethylenimine (25 kDa, PEI), especially the aromatic tryptophan substituted OEI. Moreover, OEI-AAs exhibited excellent serum tolerance, and up to 137 times higher transfection efficiency than PEI 25 kDa that was obtained in the presence of serum. The cytotoxicity of OEI-AAs is much lower than PEI 25 kDa. This study may afford a new method for the development of low molecular weight oligomeric non-viral gene vectors with both high efficiency and biocompatibility.Keywords:gene delivery;non-viral gene vector;LMW PEI;aromatic amino acid;structure-activity relationship
研究领域:
药理学
·
遗传学
·
生物技术
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）