JOURNAL OF MEMBRANE SCIENCE
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2018
·
IF 6.578
Shasha Zhao,Jiayou Liao,Danfeng Li,Xiaodong Wang,Nanwen Li
The novel gas separation membranes have been prepared by blending highly gas permeable polymer of intrinsic microporosity (PIM-1) and with Tröger's Base polymer (TB). Interestingly, it was found firstly that the PIM-1 polymer was miscible with Tröger's Base polymer in any proportion. It was assumed that the excellent compatibility between two polymers could be attributed to the interaction between CN group in PIM-1 and N atoms in Tröger's Base moieties, as confirmed by ATR-IR results. Thus, flexible, tough and transparent blending membranes (PIM/TB) at different compositions between PIM-1 and TB were obtained by solution casting. The SEM results further confirmed the homogeneous morphology of blending membranes, indicating the excellent compatibility between two polymers. The gas separation performance testing by the volume-constant method suggested that the PIM/TB blending membrane showed lower pure gas permeability but higher ideal permselectivity than that of the pristine PIM-1 membrane, probably due to the lower d-spacing of TB polymers from commercial aromatic diamine which has a rotatable bond as confirmed by XRD results. The highest ideal permselectivity of CO 2 /CH 4 was obtained for PIM/TB (6:4) membranes with CO 2 permeability of 2585Barrer. Moreover, the excellent anti-plasticization ability of CO 2 was observed for the blending membranes. The temperature dependence of gas separation and ideal permselectivity had also been observed for the membranes. The results suggested that the ideal permselectivity, particularly for the CO 2 /N 2 and CO 2 /CH 4 at lower temperature were much higher than that of the membrane at high temperature in spite of the decreasing permeability of CO 2 . The highest ideal permselectivity was achieved as high as 54.3 for CO 2 /N 2 at − 25 ℃ for PIM/TB(8:2) membrane. Thus, the strategy of blending Tröger's Base with PIM-1 showed a promising approach for high performance gas separation membrane.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Yunchuan Pu,Ziqi Yang,Vanessa Wee,Zhongjie Wu,Zhongyi Jiang,Dan Zhao
Membrane-based separation technologies are promising for various applications such as carbon capture and storage (CCS). Herein, we report the preparation and performance of mixed matrix membranes (MMMs) for carbon dioxide (CO 2 ) separation. The MMMs comprise amino-functionalized metal-organic framework (MOF) nanosheets (NUS-8-NH 2 ) dispersed in the polymer of intrinsic microporosity 1 (PIM-1). Specifically, the MOF nanosheets were synthesized through a bottom-up method and introduced into the PIM-1 matrix to fabricate NUS-8-NH 2 /PIM-1 MMMs. The uniformly dispersed MOF nanosheets could afford additional fast transport pathways through intra-flake pores and inter-flake nano-channels. Moreover, the amino groups could enhance CO 2 transport within NUS-8-NH 2 /PIM-1 MMMs. In addition, hydrogen bonding between the NUS-8-NH 2 filler and PIM-1 matrix improved interfacial compatibility. Therefore, the as-prepared MMMs could achieve a high filler loading of 15 wt% without sacrificing separation performance. Compared with the pure PIM-1 membrane, the MMM with 10 wt% NUS-8-NH 2 showed CO 2 permeability of ∼14000 Barrer and a CO 2 /N 2 selectivity of ∼30, surpassing the 2008 Robeson's upper bound.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Jiuli Han,Lu Bai,Haiyan Jiang,Shaojuan Zeng,Bingbing Yang,Yinge Bai,Xiangping Zhang
Ionic liquids (ILs) have become attractive in membranes for CO2 separation because of the designable structure, high CO2 affinity, and good compatibility and stability. Modification of metal–organic frameworks with ILs is an effective strategy to improve the gas separation performance of mixed matrix membranes (MMMs). In this work, task-specific ionic liquids (TSILs) were incorporated to prepare TSIL@ZIF-67/PIM-1 MMMs and improve CO2 separation performance because of the high CO2 solubility and great compatibility toward ZIF-67 and PIM-1. The TSILs (TMGHIM and TMGHPhO) selectively and reversibly interact with CO2 and improve the interfacial compatibility between ZIF-67 and PIM-1, leading to higher CO2/CH4 and CO2/N2 selectivities than that of the ZIF-67/PIM-1 MMM and the directly blended membrane (TSIL/ZIF-67/PIM-1). The 10 wt % TMGHIM@ZIF-67/PIM-1 MMM shows enhanced CO2/N2 and CO2/CH4 selectivities of 13.7 and 10.5, respectively; meanwhile, the CO2 permeability reaches 12,848.5 Barrer and is 2.5 times that of the pure PIM-1 membrane. The TSIL@ZIF-67/PIM-1 MMMs also show good stability against physical aging.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Jiuli Han,Lu Bai,Shuangjiang Luo,Bingbing Yang,Yinge Bai,Shaojuan Zeng,Xiangping Zhang
Ionic liquids (ILs) are attractive and prospective materials used in membranes due to the nonvolatility, structure tunability, and the ability to tune the interface compatibility. The cobalt IL Bmim 2 Co(NCS) 4 possesses the porphyrin-like N4-coordinated cobalt center which could selectively and reversibly interact with O 2 . Herein the Bmim 2 Co(NCS) 4 as liquid-phase oxygen carrier was used to fabricate thin-film composite (TFC) membrane with the polymer of intrinsic microporosity (PIM-1). The microstructures, properties and gas separation performance of the membrane were compared with the TFC membrane which takes cobalt porphyrin (T(4-Cl)PPCo) as a carrier. We found that the addition of a small amount of T(4-Cl)PPCo can enlarge the d -spacing of packed chains of PIM-1 and significantly increase the fractional free volume (FFV) and the gas permeability of the membrane, but the selectivity is unsatisfactory. It is worth noting that adding Bmim 2 Co(NCS) 4 into the polymer can increase greatly the O 2 /N 2 selectivity which is higher than that of the membrane with T(4-Cl)PPCo. Although the addition of Bmim 2 Co(NCS) 4 decreases the d -spacing of packed chains of PIM-1, resulting in the slight decline of FFV and gas permeability of the membrane, the Bmim 2 Co(NCS) 4 /PIM-1 TFC membranes exhibit better O 2 /N 2 separation performance than the T(4-Cl)PPCo/PIM-1 TFC membranes in consideration of the Robeson upper bound.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Nano Select
·
2022
·Vol. 3
·期 10
·1395-1406
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IF 0
Yunfei Peng,Zhenbao Xia,Yuanhang Song,Yuexia Zhang,Yanhui Li,Pengfei Zhang
This paper is dedicated to improve the conversion efficiency of carboxylation for polymers of intrinsic microporous (PIM-1). According to stable thermal properties of PIM-1, a hydrothermal method is used for the first time to achieve the carboxylation conversion of PIM-1 (C-PIM), achieving a conversion rate of more than 90% at a reaction time of 10 hours, which is nearly five times more efficient than the most efficient conversion process currently available, preserving the film-forming properties. The completion of the carboxylation conversion is verified using 1 H-NMR and 13 C-NMR, FT-IR, and organic elemental analysis. It is found that the change in molecular weight affected the film-forming properties of the membrane material, and the hydrophobicity of the C-PIM membrane did not decrease compared with C-PIM membrane reported in previous studies. The effect of C-PIM on the selectivity of CO 2 gas is explained from the microscopic to the macroscopic level by using physical characterization such as molecular structure analysis, XRD, cross-linkage calculation, pore size and volume distribution, and fractional free volume (FFV) calculation. It verifies that the efficiency of CO 2 adsorption and diffusion selectivity for PIM-1 membranes has been improved by carboxylation, preserving excellent separation, and capture capacity of CO 2 .
研究领域:
高分子化学
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材料科学
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物理化学
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化学工程
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DOI
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
HaoJun Tian,Jiangzhou Luo,Xiangyun Liu,Xueping Zong,Song Xue
PIM-1 thin film composite (TFC) membrane has attracted great attention for organic solvent nanofiltration (OSN) because of its high porosity and excellent solution process-ability. However, the PIM-1 thin selective layer may swell excessively in polar solvents such as methanol and acetone, and thus it makes the connection between the PIM-1 selective layer and the porous support unstable, which can significantly impair its separation performance. In this work, a series of novel PIM-1 TFC membranes was obtained by spin-coating of PIM-1/tetrahydrofuran solution onto α-Al 2 O 3 ceramic supports followed by a thermal treatment process. Since the nitrile group within PIM-1 tends to experience a thermal crosslinking reaction forming stable triazine rings after heat treatment, thus the organic solvent resistance ability of PIM-1 TFC membrane was greatly enhanced. Results showed that the thermally treated PIM-1 TFC membranes possess better chemical stability in polar solvents and acceptable permeances for various solvents (e.g., 2 ∼ 4.2 L·m −2 ·h −1 ·bar −1 for methanol, and 4.3 ∼ 6.8 L·m −2 ·h −1 ·bar −1 for toluene). For instance, the PIM-1 TFC membrane termed as PIM-1-3 wt%-1h TFC showed a methanol permeance of 3.8 L·m −2 ·h −1 ·bar −1 with a rejection of 96.5% towards Congo red (M w = 697 Da). Moreover, compared to the pristine PIM-1 TFC membrane, the thermally treated PIM-1 TFC membrane possesses better separation stability after the long-term static immersion test in acetone and DMF for 7 days, and it also exhibit good stability in the continuous filtration test using 20 mg·L −1 Congo Red methanol solution, demonstrating a promising outlook in OSN fields.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Ke Chen,Linhan Ni,Hao Zhang,Chengming Xiao,Li Li,Xin Guo,Junwen Qi,Chaohai Wang,Xiuyun Sun,Jiansheng Li
Rational design of fillers and polymers is of great importance to fabricate mixed matrix membranes (MMMs) with high performance. In this work, fluorinated metal-organic frameworks (KAUST-7 (also referred as NbOFFIVE-1-Ni)) were adopted as nanofillers to prepare MMMs through physically blending into the polymer of intrinsic microporosity (PIM-1). Benefiting from the features of porous KAUST-7, including well CO 2 affinity, distinctive pore characteristics (size, shape, and functionality) and strong intermolecular interactions with PIM-1, the achieved MMMs demonstrated increased CO 2 /CH 4 separation performance and improved anti-physical aging property. Specifically, with the assistance of KAUST-7, the CO 2 permeability and CO 2 /CH 4 (30:70 vol%) selectivity of the optimized MMMs increased up to 5928 Barrer and 23.5, corresponding to improvements of 50% of and 88% of the permeability and selectivity compared with the pristine membranes, respectively. Importantly, 100-h continuous separation test results confirmed the satisfying long-term stability of the prepared MMMs. Notably, the MMMs maintained 91% of the initial CO 2 permeability after 150 days (decreased only 539 Barrer), implying that the CO 2 permeability decrement is about 5-fold lower than that of the control PIM-1 membrane. These results suggest that the fabricated MMMs are promising candidates for CO 2 separation in practical applications.
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
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Zhaojie Wang,Xinle Sun,Qinglong Liu,Caifeng Xia,Qikang Yin,Siyuan Liu,Xiaoqing Lu,Hongyu Chen
Mixed matrix membranes (MMMs), which incorporate metal-organic frameworks (MOFs) nanofillers within a polymer matrix, offer a highly promising solution for CO2 capture and separation. However, poor interfacial compatibility and filler aggregation in MMMs pose significant challenges to enhancing CO2/N2 separation performance. Here, we present a novel approach using amino ionic liquid modification to optimize MMMs, where the modified AFIL promotes the formation of ZIF-8 with well-defined facets and sharp edges, and enhances the compatibility between ZIF-8 particles and PIM-1 polymer matrix for favorable CO2 affinity and selective CO2 transport. The resulting 10 wt.% AFIL@ZIF-8/PIM-1 exhibits exceptional gas separation performance with a CO2 permeability of 7864262.2 Barrer and a CO2/N2 selectivity of 29.661.96. More importantly, the incorporation of AFIL into the ZIF-8 pores significantly enhances the thermal stability and aging resistance of AFIL@ZIF-8/PIM-1 MMMs via structural support and hydrogen bonding interactions. This work provides a practical approach to developing hybrid membranes for CO2/N2 separation, showcasing improved overall performance and strong interfacial compatibility.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shuangqi Song,Hong Li,Jingde Li,Yanqin Yang
The trade-off limitation between permeability and selectivity has hindered the widespread applications of polymer membranes. The integration of solid fillers into polymer membranes, namely the development of mixed-matrix membranes (MMMs), can overcome the trade-off effect, serving as an effective method to fabricate high-performance membranes. Porous organic polymer of PP, made from dichloro- p -xylene via Friedel-Crafts alkylation reaction, is excellent candidate for MMMs fabrication. However, tailoring PP for membrane CO 2 separation with desirable performance is still a challenge. Herein, we report the development of a functionalized PP, namely PP@oPIM-1, which is achieved by covalently grafting PIM-1 oligomers (oPIM-1) on the surface of PP. This functionalized product is used as a filler material to construct MMMs. Compared to PP-loaded MMMs, the MMMs containing PP@oPIM-1 filler demonstrate improved interfacial adhesion. Thanks to the excellent interfacial compatibility, the tensile strength of 10 wt% PP@oPIM-1/Matrimid is 59.29 MPa, which is higher than 30.24 MPa and 54.06 MPa for 10 wt% PP/Matrimid and pure Matrimid membrane, respectively. Meanwhile, the interweaving structures between oPIM-1 network on the surface of PP@oPIM-1 and polymer chains of matrix lead to the formation of highly interconnected paths between two phases, which is beneficial to fully demonstrating the advantages of filler in selective permeation of gas molecules. As such, the 10 wt% PP@oPIM-1/Matrimid membrane displays a CO 2 permeability of 17.4 Barrer and CO 2 /N 2 selectivity of 46.7, which are increased by 104.7 % and 51.1 % compared to the bare Matrimid membrane. Additionally, the broad applicability of PP@oPIM-1 in various polymer matrices, such as 6FDA-DAM polyimide and PIM-1, has also been explored.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
FREE RADICAL BIOLOGY AND MEDICINE
·
2025
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IF 8.2
Xiaomeng Ji,Jingquan Dong,Wenting Zhu,Shasha Zhang,Yaru Chen,Xiao Liu,Yan Cao,Panpan Zhao,Zibo Dong
Background Sepsis-associated encephalopathy (SAE) represents one of the most common neurological complications observed in sepsis patients, contributing to both increased mortality and long-term cognitive impairment. Microglial mitochondrial reactive oxygen species (mtROS) overproduction and NLR family pyrin domain-containing 3 (NLRP3) inflammasome activation were key pathological drivers of SAE. Although PIM-1, a serine/threonine kinase, was known to regulate both mtROS generation and NLRP3 signaling, its specific contribution to SAE remained poorly defined. Methods This study established a SAE mouse model using cecal ligation and puncture (CLP) surgery, and screened the differentially expressed gene PIM-1 through immunohistochemistry, GEO database analysis, and etc. An in vitro model was established using Lipopolysaccharide + Adenosine(LPS + ATP) Triphosphate stimulated Mouse Microglia (BV-2), and the regulation mechanism of PIM-1 was analyzed through siRNA interference, RNA-seq, and etc. Potential drug Urolithin B (UB) targeting PIM-1 inhibition was screened through molecular docking, and its inhibitory effect on PIM-1 and therapeutic potential in SAE were evaluated through thermal stability experiments, behavioral experiments, etc. Results PIM-1 was upregulated in SAE, which was associated with brain damage. PIM-1 knockdown suppressed microglial activation and reduced inflammatory cytokines release. Further investigation indicated that PIM-1 modulated mtROS generation and facilitated NLRP3 inflammasome activation. Notably, pharmacological inhibition of PIM-1 by UB alleviated SAE both in vivo and in vitro , resulting in improved neuronal damage and cognitive impairment. Conclusion PIM-1 played a critical role in SAE progression, potentially through its mediation of microglial activation and neuroinflammation via the mtROS/NLRP3 axis. Notably, pharmacological inhibition of PIM-1 with urolithin B significantly alleviated SAE.
研究领域:
神经免疫学
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重症医学
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分子神经生物学
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炎症与感染
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转化神经科学
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药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xuebi Du,Dawei Shao,Shichao Feng,Yinhua Wan
Two-dimensional (2D) metal–organic framework nanosheets (MONs) materials exhibit significant potential in achieving high CO 2 separation performance. This study presents a demonstration of the rapid synthesis of Ce 6 BTB nanosheets at a low temperature of 80 °C and atmosphere pressure of approximately 1 atm. The resulting Ce 6 BTB nanosheets possess notable characteristics, such as high aspect ratios and 1D diamond shaped channels, which facilitate the fast rapid transport of CO 2 molecules. The Ce 6 BTB was firstly blended into PIM-1 with different loadings to form PIM/Ce 6 BTB mixed matrix membranes (MMMs). The incorporation of well-dispersed Ce 6 BTB fillers enhances the efficiency of CO 2 transport by inter-flake nano-channels and intra-flake pores. Moreover, the increased crystallinity, dense chain spacing, and hydrogen bonding contribute to enhanced sieving ability, resulting in high gas selectivity. Consequently, the MMMs containing 2 wt% Ce 6 BTB demonstrate high CO 2 permeability of 5930 Barrer and CO 2 /N 2 selectivity of 23.2, which is far surpasses 2008 upper bound from Robeson and approaches the refined 2019 upper bound from MeKenow. Furthermore, the PIM/Ce 6 BTB-2 MMMs present relatively good anti-pressure properties and long-term operation stability, which is advantageous in terms of industrial applications.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ChemSusChem
·
2019
·Vol. 12
·期 10
·2231-2239
·
IF 7.804
Ying Pan,Xiaofei Zhai,Jian Yin,Tianqi Zhang,Liujia Ma,Yi Zhou,Yufeng Zhang,Jianqiang Meng
Graphical A metal-ion-crosslinked PIM-1 framework as heterogeneous catalyst is reported for promoting the CO 2 cycloaddition with epoxides. The new catalyst PIM-COONa-Zn demonstrates both high catalytic efficiency and good recyclability. CO 2 cycloaddition to epoxides is an effective and economical utilization method to alleviate the current excessive CO 2 emission situation. The development of catalysts with both high catalytic efficiency and high recyclability is necessary but challenging. In this context, a heterogeneous catalyst was synthesized based on a zinc-ion-crosslinked polymer with intrinsic microporosity (PIM-1). The high microporosity of PIM-1 promoted a high Zn 2+ loading rate. Additionally, the relatively stable ionic bond formed between Zn 2+ and the PIM-1 framework through electrostatic interaction ensured high loading stability. In the process of CO 2 cycloaddition with propylene epoxide, an optimized conversion of 90 % with a turnover frequency as high as 9533 h −1 could be achieved within 0.5 h at 100 °C and 2 MPa. After 15 cycles, the catalytic efficiency did not demonstrate a significant decline, and the catalyst was able to recover most of its activity after Zn 2+ reloading. This work thereby provides a strategically designed CO 2 conversion catalyst based on an ionic crosslinked polymer with intrinsic microporosity.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）