KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2022
·Vol. 39
·期 3
·475-483
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IF 3.146
Lv Xia,Li Xueqin,Huang Lu,Ding Siyuan,Lv Yin,Zhang Jinli
Pebax® MH 1657 (Pebax)-based blend membranes with different polyether-amine (PEA) loadings were designed and fabricated for efficient CO 2 separation. The CO 2 separation performance of Pebax/PEA blend membranes was greatly improved in comparison with that of pure membranes. This was mainly because the introduced PEA tailored the physical and chemical microenvironments in blend membranes. Specifically, PEA was a liquid-like additive, which was beneficial to reduce the mass transfer resistance of gases and increase CO 2 permeability. Meanwhile, PEA contained amino groups that acted as mobile carriers to tailor the chemical microenvironment in blend membranes. The mobile carriers preferentially reacted reversibly with CO 2 molecules, facilitating CO 2 transport in membranes. Compared with CO 2 /CH 4 separation performance of pure Pebax membrane, CO 2 permeability and CO 2 /CH 4 separation factor of Pebax/PEA-3 increased by 144.8% and 29.4%, respectively. This study suggests that PEA is a promising membrane material for tailoring the physical and chemical microenvironments in blend membranes for efficient CO 2 separation.
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 AND PURIFICATION TECHNOLOGY
·
2026
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IF 9.1
Siding Chen,Ruyun Yan,Qing Li,Zhe Zhang,Weiyuan Liang,Xinyu Wang,Lu Yao,Lin Yang,Wenju Jiang,Junfeng Zheng,Zhongde Dai
Thin-film nanocomposite (TFN) membranes incorporating metal-organic frameworks have attracted considerable interest in natural gas (NG) dehydration. However, fabricating high-performance TFN membranes remains a major challenge. In the current study, TFN membranes were produced by combining UiO-66 nanoparticles into a Pebax 1657 matrix supported by porous polyacrylonitrile (PAN). Even though the pore size of UiO-66 is bigger than both water and methane molecules, the presence of UiO-66 in the Pebax significantly improved the H 2 O/CH 4 separation performances, which is attributed to a combined mechanism involving molecular sieving and selective affinity, including the potential formation of hybrid interfacial channels with narrowed pore sizes, the framework flexibility of UiO-66, and the strong hydrogen bonding between H 2 O and the Zr–OH clusters that enhances water solubility selectivity over CH 4 . At a UiO-66 loading of 30 wt%, the water vapor permeance rose to 56,725 GPU, alongside an outstanding H 2 O/CH 4 selectivity (29,553), representing an 110% increase in water permeance and a 990% enhancement in H 2 O/CH 4 selectivity compared to the pristine Pebax membrane. This performance exceeds most literature-reported values, furthermore, the H 2 O/CH 4 separation performances were also carried out using the produced water from a natural gas field, excellent stability of the TFN membrane was observed over a 7-day continuous test, marking a significant advance toward practical application. The findings demonstrate that strategically incorporating UiO-66 into a Pebax matrix to form TFN membranes holds immense potential for NG dehydration. Graphic abstract Download: Download high-res image (101KB) Download: Download full-size image
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DOI
高影响因子
POLYMER
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2026
·
IF 5.1
Chun-Hua Lu,Ying Shi,Jingshen Wu
Electron-beam (E-beam) irradiation provides an effective route to modify polymer architecture, but the mechanistic connection between radical chemistry and structural evolution remains incompletely understood. Here, the irradiation-induced structural transformation of bio-based Pebax was systematically investigated over a dose range of 10–150 kGy. GPC and rheological measurements reveal a dose-dependent transition from long-chain branching (LCB) to network formation. At doses up to 60 kGy, the increase in weight-average molar mass, broadening of the high-molar-mass tail, decrease in the Mark–Houwink slope, and enhanced strain hardening consistently indicate the formation of LCB structures. At higher doses, rapid gel formation together with reduced complex viscosity indicates that crosslinking becomes dominant, while degradation increasingly contributes to the evolution of the soluble fraction. EPR spectroscopy shows that the dominant detectable radical signal is consistent with a site-confined α-oxyalkyl radical associated primarily with the polyether soft segments, and GC confirms the formation of trace H 2 , supporting hydrogen abstraction as an important elementary step. These results support a plausible radical-mediated pathway in which α-oxyalkyl radicals undergo recombination to generate branched/crosslinked structures or β-scission to produce degradation products. This work establishes a molecular-level framework linking radical processes to dose-dependent architectural evolution in irradiated bio-based Pebax.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Sihui Li,Keming Zhang,Chenlu Liu,Xiaoting Feng,Peijin Wang,Shaofei Wang
Polymeric membranes containing polyethylene oxide (PEO) groups are promising CO 2 separation materials, but suffer from the trade-off between separation performance and mechanical strength . To overcome this challenge, we combine the merits of semi-interpenetrating polymer network and nanohybrid to maintain a high PEO loading and robust membrane structure. The membranes were prepared by introducing in-situ formed PEO networks with silica nodes into Pebax1657 to produce a semi-interpenetrating network structure. The introduced network and in situ formed silica nanoparticles reduce the chain packing efficiency of Pebax matrix to enhance the CO 2 diffusivity , while the increased PEO content enhances CO 2 solubility. Under feed gas pressure of 25 bar, nanohybrid membranes containing 40 wt% polymer network display excellent gas separation performance with CO 2 permeability of 272.8 Barrer and CO 2 /N 2 selectivity of 79.6 under mixed gas separation tests, surpassing 2008 Robeson upper bound. Moreover, the hybrid membranes showed high mechanical strength, the Young's modulus increases by 1.95 times. This strategy provides a simple route for the design of nanohybrid membranes with high separation performance as well as excellent durability.
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
ACS Applied Materials & Interfaces
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2016
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IF 7.145
Haiyang Zhang,Ruili Guo,Jinpeng Hou,Zhong Wei,Xueqin Li
In this study, a carbon nanotubes composite coated with N-isopropylacrylamide hydrogel (NIPAM-CNTs) was synthesized. Mixed-matrix membranes (MMMs) were fabricated by incorporating NIPAM-CNTs composite filler into poly(ether-block-amide) (Pebax MH 1657) matrix for efficient CO2 separation. The as-prepared NIPAM-CNTs composite filler mainly plays two roles: (i) The extraordinary smooth one-dimensional nanochannels of CNTs act as the highways to accelerate CO2 transport through membranes, increasing CO2 permeability; (ii) The NIPAM hydrogel layer coated on the outer walls of CNTs acts as the super water absorbent to increase water content of membranes, appealing both CO2 permeability and CO2/gas selectivity. MMM containing 5 wt % NIPAM-CNTs exhibited the highest CO2 permeability of 567 barrer, CO2/CH4 selectivity of 35, and CO2/N2 selectivity of 70, transcending 2008 Robeson upper bound line. The improved CO2 separation performance of MMMs is mainly attributed to the construction of the efficient CO2 transport pathways by NIPAM-CNTs. Thus, MMMs incorporated with NIPAM-CNTs composite filler can be used as an excellent membrane material for efficient CO2 separation.
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
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2016
·
IF 5.557
Dongdong Peng,Shaofei Wang,Zhizhang Tian,Xingyu Wu,Yingzhen Wu,Hong Wu,Qingping Xin,Jianfeng Chen,Xingzhong Cao,Zhongyi Jiang
In this study, a novel kind of facilitated transport membrane was prepared by incorporating zinc ion-modified graphene (GO-DA-Zn 2+ ) nanosheets into a poly(ether-block-amide) (Pebax) matrix. Graphene oxide (GO) nanosheets were modified with zinc ion (Zn 2+ ) by using dopamine-mediated complexation reaction. The CO 2 separation properties of the facilitated transport membrane were evaluated using CO 2 /CH 4 mixture as model system. The GO-DA-Zn 2+ nanosheets played an important role in enhancing membrane performance. First, the high zinc ion loading (34.2 wt% of the nanosheets) could enhance the facilitated transport of CO 2 based on π-complexation mechanism, leading to a higher CO 2 permeability and selectivity. Second, the incorporation of graphene nanosheets with high aspect ratio rendered more tortuous gas transport channels, which was favorable for hindering the penetration of CH 4 with larger molecular size and thus enhancing the CO 2 /CH 4 selectivity. Third, the fractional free volume of hybrid membrane was much elevated, also leading to higher CO 2 permeability. The optimum separation properties of GO-DA-Zn 2+ incorporated Pebax membranes were achieved with a CO 2 permeability of 137.9 Barrer and a CO 2 /CH 4 selectivity of 30.6, which were 49% and 78% higher than those of pristine Pebax membrane.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Wei Zheng,Haiyan Jiang,Chaoran Wang,Shaojuan Zeng,Xiaochun Zhang,Haifeng Dong,Lu Bai,Xiangping Zhang
Carbon dioxide (CO2) separation plays a vital role in environmental protection and resource reuse. A potential approach to achieving satisfactory CO2 separation is combining the benefits of ionic liquids (ILs) and membranes. In this work, the IL-LDH nanosheets were obtained by functionalized IL modifying layered double hydroxides (LDH) and used to construct the Pebax/IL-LDH mixed matrix membranes (MMMs). The X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS) spectra analysis displayed that the IL was successfully grafted to the LDH nanosheets. The characterizations of MMMs showed that the introduction of IL-LDH reduces the crystallinity of the Pebax membrane, and there are hydrogen bond interactions between fillers and Pebax. The IL modification strengthens the membranes with better CO2 affinity and improves the interfacial compatibility between Pebax and LDH. Meanwhile, the CO2-philic nanochannels formed by the slits of IL-LDH nanosheets facilitate CO2 transport in MMMs. Such inherent properties of the IL and LDH conjunctly contribute to the improvement of the CO2 separation performance of membranes. The optimum Pebax/IL(20)-LDH MMM has a high CO2 permeability of ∼388 barrer at 30 °C, which is approximately 2.9 times that of pure Pebax, and the CO2/CH4 selectivity does not change significantly. Besides, the Pebax/IL(20)-LDH MMM exhibited a notable increase in CO2 permeability as the working temperature increased, ultimately attaining ∼576 barrer at 50 °C.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Chemical Engineering and Processing-Process Intensification
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2019
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IF 3.031
Haikuan Yuan,Xiaodi Liu,Shuai Zhang,Jie Lu
Polyether-block-amide (Pebax) is a novel membrane material for pervaporative (PV) desulfurization of gasoline. In order to improve its desulfurization performance, Pebax was doubly modified by blending of perfluorosulfonic acid (PFSA) and hybridization of Si sol in this study, and Pebax-PFSA-Si hybrid membrane was fabricated. The hybrid membrane was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Polyacrylonitrile (PAN) ultrafiltration (UF) membrane as support, Pebax-PFSA-Si/PAN composite membrane was fabricated using coating method for PV desulfurization of n -heptane/thiophene mixtures. The incorporation of Si sol increased the cross-linking degree of Pebax-PFSA membrane, effectively inhibiting the excessive swelling of membrane. The dynamic absorption behavior of Pebax-PFSA-Si hybrid membrane was investigated. The degree of swelling ( DS ) of membrane increased with an increase of thiophene concentration in the feed. Effects of membrane compositions and operational variables such as feed temperature, feed sulfur concentration on desulfurization performance of Pebax-PFSA-Si/PAN composite membrane were investigated. Compared with Pebax membrane, Pebax-PFSA-Si/PAN membrane had the higher permeation flux because of the blending of PFSA and the higher enrichment factor due to the hybridization by Si sol.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
Membranes
·
2025
·Vol. 15
·期 1
·26
·
IF 3.6
Rujing Hou,Junwei Xie,Yawei Gu,Lei Wang,Yichang Pan
Membrane technology is a promising methodology for carbon dioxide separation due to its benefit of a small carbon footprint. However, the trade-off relationship between gas permeability and selectivity is one obstacle to limiting its application. Herein, branched polyethyleneimine (BPEI) containing a rich amino group was successfully grafted on the surface of the metal–organic framework (MOF) of AIFFIVE-1-Ni (KAUST-8) through coordination between N in BPEI and open metal sites in the MOF and with the resultant maintained BET surface area and pore volume. Both the strengthened CO 2 solubility coefficients coming from the additional CO 2 adsorption sites of amino groups in BPEI and the reinforced CO 2 diffusivity coefficients originating from the fast transport channels created by KAUST-8 led to the promising CO 2 separation performance for KAUST-8@BPEI/Pebax-1074 MMM. With 5 wt.% KAUST-8@BPEI loading, the MMM showed the CO 2 permeability of 156.5 Barrer and CO 2 /N 2 selectivity of 16.1, while the KAUST-8-incorporated MMM (5 wt.% loading) only exhibited the CO 2 permeability of 86.9 Barrer and CO 2 /N 2 selectivity of 13.0. Such enhancement is superior to most of the reported Pebax-1074-based MMMs for CO 2 separation indicating a wide application for the coordination method for MOF fillers with open metal sites.
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
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Chao Tang,Bing Wu,Guowei Yang,Guangjian Chai,Dian Qu,Chun Chen,Zhihong Yang,Jian Sun,Jianmei Xu,Zhiquan Chen,Qihang Wang,Wei Zhou
Metal organic frameworks (MOF) are widely incorporated into mixed matrix membranes (MMMs) for CO 2 separation. However, the relationship between MOF-induced free volume characteristics and transport behavior remains insufficiently understood. In this work, Pebax MH 1657-based MMMs were prepared using a dual ligand aluminum-based MOF (CAU-PBH), derived from CAU-10-H through partial substitution of isophthalic acid by pyridine-3,5-dicarboxylic acid, as a filler to investigate its effect on the free volume and CO 2 transport properties of the Pebax membranes. It exhibits a microporous structure and a polar chemical environment containing carboxylate and N-heterocyclic groups, which are favorable for CO 2 adsorption and polymer-filler compatibility. The optimized MMM containing 5 wt% CAU-PBH showed a CO 2 permeability of 95.10 Barrer and a CO 2 /N 2 selectivity of 66.64 at 0.2 MPa and 35 °C, approaching the 2008 Robeson upper bound. Quantitative positron annihilation lifetime spectroscopy (PALS) analysis revealed that CAU-PBH incorporation modified the free volume characteristics of Pebax through changes in polymer chain packing and crystallization behavior. The MOF-induced changes in free volume characteristics were closely associated with changes in gas diffusivity, while CO 2 solubility increased markedly. The regulated free volume characteristics, together with the intrinsic micropores and CO 2 affinity sites of CAU-PBH, enhanced CO 2 sorption and contributed to selective transport pathways, thereby improving CO 2 separation performance. These results indicate that the separation enhancement cannot be attributed to a simple change in free volume alone, establishing a PALS-based structure-transport correlation between MOF-induced free volume characteristics and CO 2 transport behavior in Pebax MMMs.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Qian-Qian Li,Yang Li,Heng Mao,Yan-Mei Zhang,Qiu-Ying Zhang,Xin-Ru Chen,Zi-Cong Shan,Xian-Zhe Zhou,Li-Hao Xu,Zhi-Ping Zhao
Mixed matrix membranes (MMMs) have emerged as a critical platform for molecular separation, especially carbon capture from point-emission sources. In this study, a series of novel MMMs were fabricated by incorporating the bimetallic Ag/Zn-ZIF-8 nanoparticles into the poly (ether-block-amide) (Pebax) matrix for efficient CO 2 /N 2 separation. The SEM, EDS, XRD, FTIR, XPS, TGA, N 2 adsorption-desorption measurements were employed to elucidate the microstructures and physicochemical properties of the resultant nanoparticles and membranes. The bimetallic coordination-induced optimization modulated the inherent structure of ZIF-8 framework and enhanced CO 2 affinity, thereby forming the CO 2 -selective transport channels over N 2 . The incorporation of Ag + promoted the uniform dispersion of Ag/Zn-ZIF-8 nanoparticles in Pebax matrix, indicating the excellent polymer-filler interfacial compatibility. Impressively, the resulting membrane achieved the superior separation performance with a CO 2 permeability of 359 Barrer and a CO 2 /N 2 selectivity of 53, which were 2.5 and 1.4 times higher than that of the pristine Pebax membrane. Besides, the introduction of Ag/Zn-ZIF-8 nanoparticles enhanced the thermal and mechanical stability of the membrane, ensuring the potential for long-term operation. These findings herein advance the rational design and preparation of high-performance MMMs for sustainable carbon capture.
研究领域:
材料科学
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膜技术
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碳捕集与封存
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化学工程
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纳米材料
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产品关联
DOI
高影响因子
Advanced Membranes
·
2025
·
IF 9.5
Chengyun Gao,Yuxuan Zhang,Junling Lin,Weijie Sun,Yangyang Wang,Fanhui Meng,Jiayou Liao,Xianjie Meng
A novel class of mixed-matrix membranes was synthesized through strategic integration of Polyether-block-amide (PEBAX) with Deca-dodecasil 3R (DD3R) zeolitic fillers, targeting efficiency-driven ethanol recovery in pervaporation separation systems. The DD3R molecular sieve was synthesized using adamantylamine (ADA) as a structure-directing agent and Sigma-1 seed crystals in a pure silicon precursor system. To improve compatibility with the polymer matrix, the DD3R particles were surface-modified with a silane coupling agent. Comprehensive characterization through Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectra (XPS), Water Contact Angle (WCA), X-ray diffraction (XRD), swelling degree tests, and mechanical properties confirmed the successful bonding of the silane coupling agent to both DD3R and PEBAX. The optimized membrane containing 0.75 wt.% DD3R achieved a flux of 1152.06 g/m 2 h and a separation factor of 4.52 at 60 o C with a 5 wt.% ethanol feed concentration, representing a 115 % enhancement in flux and a 68 % increase in separation factor compared to the pristine PEBAX membrane. Additionally, the PEBAX/DD3R membrane displayed excellent long-term stability. This work provided a foundation for developing membranes with DD3R incorporated therein for a wide range of liquid or gas mixture separation processes.
研究领域:
材料科学
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化学工程
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分离技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）