JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Jiangying Liu,Yang Pan,Jingyi Xu,Zhenggang Wang,Haipeng Zhu,Gongping Liu,Jing Zhong,Wanqin Jin
Pebax-based membranes have attracted intensive interest for high separation efficacy of carbon dioxide . For achieving excellent gas permeance, ultrathin membrane thickness is always the pursuit of composite membrane technology, in which controlling the interfacial property of the multi-layer remain a great challenge. Herein, we introduced an amphipathic copolymer polydimethylsiloxane (PDMS)-block-polyethylene oxide (PEO) (PDMS- b -PEO) into the intermediate layer to tune the interfacial adhesion, enabling fabrication of ultra-thin Pebax composite membrane. It was demonstrated that surface segregation of PEO segments not only suppressed formation of dense SiO x layer due to the plasma treatment on PDMS intermediate layer, but also provided extra hydrophilic sites and interfacial compatibility for subsequent Pebax selective layer coating. With the present of PDMS- b -PEO in the intermediate layer, an integrated Pebax selective layer with thickness of ∼50 nm was successfully fabricated. The resulting ultra-thin Pebax composite membrane exhibited outstanding performance with CO 2 permeance of 2142 GPU and CO 2 /N 2 selectivity of 36. The strategy of using amphipathic copolymer as intermediate layer enhanced the composite membrane integrity and simplified the plasma pre-treatment, showing great potential in developing highly permeable membrane for efficient CO 2 capture.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2016
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IF 5.557
He Ding,Fusheng Pan,Ena Mulalic,Hassan Gomaa,Weidong Li,Hao Yang,Hong Wu,Zhongyi Jiang,Baoyi Wang,Xingzhong Cao,Peng Zhang
In this study, Cu + and Fe 2+ ions were co-impregnated onto carbon nitride nanosheets via polydopamine chelating, and then incorporated into a Pebax matrix to fabricate the facilitated transport hybrid membranes. The homogeneously dispersed nanosheets disturb the packing of Pebax chains and render the hybrid membrane an appropriate free volume property. The existence of stabilizer Fe 2+ on Cu + Fe 2+ @CNs prevents the disproportionation and oxidation of Cu + , which is an efficient facilitated transport carrier for thiophene via π-complexation in gasoline desulfurization. Accordingly, the hybrid membranes exhibit superior desulfurization performance along with good stability even at high operation temperature. Especially, when the content of Cu + Fe 2+ @CNs is 5 wt%, the membrane achieves the optimum desulfurization performance with a permeation flux of 13.42 kg/(m 2 h) (18.76% higher than that of pure Pebax membrane) and an enrichment factor of 7.11 (28.80% higher than that of pure Pebax membrane) under 60 °C for octane-thiophene model gasoline with thiophene content of 1312 ppm. Besides, the membrane shows good stability in the long-term desulfurization under high operation temperature of 60 °C for 10 days and keeps the stability of incorporated Cu + for six months. The study offers a facile approach to enhance the carrier stability in high-performance facilitated transport membranes.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Membranes
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2022
·Vol. 12
·期 8
·786
·
IF 4.562
Xingqian Wang,Yuping Zhang,Xinwei Chen,Yifei Wang,Mingliang He,Yongjiang Shan,Yuqin Li,Fei Zhang,Xiangshu Chen,Hidetoshi Kita
Fillers play a critical role in the performance of mixed matrix membranes (MMMs). Microporous metal azolate frameworks (MAFs) are a subclass material of metal–organic frameworks (MOFs). Due to the uncoordinated nitrogen of the organic ligands, MAF-7 (SOD-[Zn(mtz)2], Hmtz = 3-methyl-1,2,4-triazole, window: d = 0.34 nm) shows excellent CO2adsorption performance. In this work, Pebax 1657/MAF-7 MMMs were prepared by a sample solution casting method with MAF-7 particles as fillers for the first time. By means of X-ray diffraction (XRD), scanning electron microscope (SEM), infrared radiation (IR), and thermogravimetry (TG), the compositional and structural properties of the mixed matrix membrane with different filler content were analyzed. The results show that the compatibility of MAF-7 and Pebax is good with a filler content of 5 wt.%. The pure gas testing showed that mixed matrix membrane has a high ideal CO2/N2selectivity of 124.84 together with a better CO2permeability of 76.15 Barrer with the optimized filler content of 5 wt.%. The obtained membrane showed 323.04% enhancement in selectivity of CO2/N2and 27.74% increase in the permeability of CO2compared to the pristine membrane at 25 °C and 3 bar. The excellent separation performance may be due to the ligands that can afford a Lewis base active site for CO2binding with the uniform dispersion of MAF-7 particles in Pebax and the favorable interface compatibility. The obtained membrane overcomes the Robeson’s upper bound in 2008 for CO2/N2separation. This work provides a new strategy by utilizing MAFs as fillers with triazole ligand to enhance the gas separation performance of mixed matrix membranes.
研究领域:
材料科学
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气体分离
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膜技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2015
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IF 5.056
Yifan Li,Xueqin Li,Hong Wu,Qingping Xin,Shaofei Wang,Ye Liu,Zhizhang Tian,Tiantian Zhou,Zhongyi Jiang,Hongwei Tian,Xingzhong Cao,Baoyi Wang
Calcium lignosulfonate (CaLS) is an organic anionic surfactant , which has been used for the first time as a charged additive to improve the performance of Pebax membranes for CO 2 separation. Owing to the abundant hydrophobic groups and low charge density of lignosulfonate ion (LS 2− ), CaLS was found to efficiently interrupt the chain packing of Pebax 1657 matrix via both metal-organic complexation and hydrophobic interaction, endowing membranes with tunable fractional free volume (FFV). For dry membranes, CaLS could slightly enlarge membrane FFV without forming highly crosslinked structures. For humidified membranes, water-induced swelling led to a remarkable enhancement of FFV, while the hydrophobic interaction between CaLS and Pebax avoided excessive swelling. With the coexistence of CaLS and water, optimal FFV and moderate salting-out effect were acquired, resulting in very high CO 2 permeability (3585 Barrer) and fairly good CO 2 /gas selectivity (29 for CO 2 /CH 4 and 71 for CO 2 /N 2 ). The separation mechanism was discussed by analyzing the relationship between salting-out effect and the well-known solution-diffusion mechanism. Based on the performance comparison of Pebax–CaLS membrane with the previously reported Pebax–salt membranes, the guideline about the design of polymer electrolyte membranes for CO 2 capture was tentatively proposed.
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
MICROPOROUS AND MESOPOROUS MATERIALS
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2022
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IF 5.876
Hengheng Cao,Minmin Gou,Chufei Wang,Ruili Guo
A MIL-88B-on-UIO-66 (Abbreviation for UIO@MIL) hybrid-phase MOFs with rod-to-octahedral structure was obtained by the epitaxial growth method, and was added to Pebax matrix to develop a series of Pebax/UIO@MIL MMMs for CO 2 /CH 4 separation. In UIO@MIL hybrid-phase MOF, CO 2 solubility domain is formed in the core of UIO@MIL due to the abundant Zr–OH on the surface of UIO-66. MIL-88B has large pores and special rod-like structure that can entangled with the Pebax chain and adjust the spacing of the Pebax chain to form CO 2 diffusion domains in MMMs. The results show that Pebax/UIO@MIL-4 membrane has the best CO 2 separation performance, the CO 2 permeability is 379.07 ± 10.00Barrer, and the CO 2 /CH 4 selectivity is 38.1 ± 1.33. Therefore, hybrid-phase MOFs fillers provide a novel idea for the design of excellent MMMs.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Qingping Xin,Shuo Li,Faxin Ma,Jianping Guo,Shaofei Wang,Guangyu Xuan,Xiaoli Ding,Lei Zhang,Yuzhong Zhang
The preparation of mixed matrix membranes (MMMs) using metal–organic framework (MOF) as fillers is one of the simple and effective methods to improve the gas permeability and selectivity of membranes, and it has an attractive prospect to achieve controllable gas separation process. Herein, NH 2 -MIL-53 nanoparticles are synthesized by hydrothermal method and modified by aminoazobenzene (Azo) by decompression loading technology. The multifunctional Azo@NH 2 -MIL-53 nanoparticles are incorporated into the Pebax matrix to fabricate MMMs for efficient and controllable SO 2 separation. Pebax/Azo@NH 2 -MIL-53–20% membrane exhibits the maximum SO 2 permeability of 2570 Barrer with a SO 2 /N 2 selectivity of 717 and the separation process of SO 2 /N 2 has dynamic photo-responsive characteristics under different light conditions, which is attributed to the incorporation of the Azo@NH 2 -MIL-53. First, the NH 2 -MIL-53 nanoparticles with high specific surface area of 637 m 2 .g −1 and pore size of 1.50 nm are introduced into MMMs to construct rich SO 2 transport channels, increasing the diffusivity selectivity. Second, the inherent –NH 2 groups and introduced -N = N- groups in Azo@NH 2 -MIL-53 increase the affinity of SO 2 , enhancing the solubility selectivity. Third, by artificially changing the light conditions to accurately control the conformation of Azo and the pore structure of NH 2 -MIL-53 is changed, which significantly changes the SO 2 adsorption capacity of NH 2 -MIL-53. Due to light is available in abundance in the form of sunlight, the mixed matrix membrane coupled with photo-responsive MOF can achieve more efficient and energy-saving gas separation process.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Chengli Jiao,Zedong Li,Xinxin Li,Mian Wu,Heqing Jiang
Poor interfacial compatibility that often led to low gas separation performance is one of key challenges for developing composite membranes. In the present study, nanosized polyethyleneimine (PEI) functionalized ZIF-8 (PEI-ZIF-8) with good dispersion, having a particle size around 15 nm, has been synthesized via in-situ method and used as filler to fabricate Pebax/PEI-ZIF-8 composite membranes. Excluding the intrinsic porous structure and higher affinity with CO 2 of PEI-ZIF-8 beneficial for CO 2 selective transport, the large density of amine groups on PEI chains provide a good interfacial compatibility, and introduce facilitated CO 2 transport path. Furthermore, PEI-ZIF-8 reduces the crystallinity of Pebax matrix, which is favorable for CO 2 transport. The composite membrane with 5 wt% PEI-ZIF-8 shows a CO 2 permeance of 13.0 GPU with a CO 2 /N 2 selectivity of 49.0, which increases by 80.6% and 118.8% respectively in contrast with pristine Pebax membrane. The results demonstrate that nanoparticles functionalized by amine-polymer with long chains is effective for constructing composite membranes with good interfacial compatibility.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Hui Guo,Shaohan Lian,Run Li,Yijuan Zhang,Quan Zhao,Chunfeng Song
CO 2 capture, storage and utilization has been acknowledged as an important strategy for climate change mitigation . 2D materials have great advantages in gas separation due to their high aspect ratio and nano-sized thickness, such as LDH with tunable interlayer ions. In this work, 12-Aminododecanoic acid was incorporated as an intercalator between MgAl LDH layers and used as filler for the preparation of mixed matrix membranes (MMMs). Amino and carboxyl groups in amino acids could be used to enhance the performance of CO 2 gas separation by quadrupole moment effect and increasing the layer spacing. The XRD pattern showed an increase in the layer spacing, while the characteristic peaks of amino and carboxyl groups were observed in the FTIR pattern and the initial characteristic peaks did not disappear, indicating that the amino acids were successfully intercalated into the LDH layer. The experimental results indicated that MMMs with 5 wt% 12AA-LDH achieved CO 2 permeability of 92.57 Barrer and CO 2 /N 2 selectivity of 50.8, which increasing by 125 % and 17 %, compared to pristine Pebax membranes. It could be observed that 2D materials can be used in gas separation by cross-linking and intercalation to preparing high performance separation membranes .
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2023
·
IF 3.9
Xiangyang Liu,Longhui Fang,Jin Wang,Sihan Huang,An Li,Hui Liu,Zhuoyang Lu,Jiangang Long,Maogang He
R410A is a high GWP (2088) refrigerant blend soon to be eliminated, consisting of equal mass of difluoromethane (R32) and pentafluoroethane (R125). R32 is a good additive to the next generation refrigerant hydrofluoroolefin due to low GWP (675) and superior thermodynamic properties. But the separation of R32 and R125 by conventional distillation is a challenge because of their near boiling points. In this study, innovative membranes combining metal-organic framework (MOF) and ionic liquid (IL) are applied to the recovery of valuable R32 from R410A and demonstrate excellent R32/R125 separation performance. [C 2 mim][BF 4 ] was embedded into the nanocages of ZIF-8 through a impregnation strategy to prepare ZIF-8@[C 2 mim][BF 4 ]/Pebax mixed-matrix membranes (MMMs). Characterization results confirmed that IL was successfully added to the nanocages of ZIF-8. ZIF-8@[C 2 mim][BF 4 ]/Pebax MMMs with 10 wt% loading exhibits the best separation performance, increasing R32 permeability and R32/R125 selectivity by 177% and 150% compared to neat Pebax membrane. The ZIF-8 @ [C 2 mim][BF 4 ] material by impregnation has excellent performance in regulating the effective cage size of MOF, providing new strategies for designing more accurate and efficient MMMs.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2014
·
IF 3.84
Shuai Liang,Xiaowei He,Fei Wang,Wangchang Geng,Xin Fu,Jing Ren,Xingmao Jiang
LiCl–Pebax 2533 composite nanofibers with different amounts of LiCl·H 2 O have been successfully synthesized by an electrospinning method. Humidity sensing properties, including the impedance versus relative humidity (RH), humidity hysteresis, and response and recovery time of these composites have been investigated. These results indicated that LiCl-added material possessed higher humidity sensitivity and LiCl–Pebax 2533 composite with LiCl·H 2 O content at 44.4 wt% displayed the best humidity sensing property. The impedance of the sensor changed nearly four orders of magnitude when the relative humidity changed from 11% RH to 95% RH and the hysteresis can be neglected. Furthermore, the response and recovery time of the sensor was 30 s and 80 s, respectively. Humidity sensing mechanism was analyzed by complex impedance spectra and the corresponding equivalent circuit.
研究领域:
材料科学
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传感器技术
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纳米材料
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生物医学工程
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环境监测
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
·
IF 5.774
Xiao Li,Shifan Yu,Kun Li,Chao Ma,Jing Zhang,Hui Li,Xiao Chang,Lei Zhu,Qingzhong Xue
It is imperative to research CO 2 separation membrane in terms of the issues of greenhouse gas emission. In this work, zeolitic imidazolate frameworks-8 (ZIF-8) particles in situ inserted by multiwalled carbon tubes (MWCNTs) (MWCNTs@ZIF-8) were embedded into Pebax matrix to fabricate mixed matrix membranes (MMMs). The incorporated ZIF-8 particles increased the free volume of membranes, resulting in the improvement of the CO 2 permeability. The functionalized MWCNTs in situ inserted into ZIF-8 particles not only avoided the aggregation of ZIF-8 particles but also enhanced the CO 2 adsorption property, resulting in the improvement of the CO 2 /N 2 selectivity. Furthermore, the MWCNTs can provide rapid transport channels for CO 2 molecules between two adjacent ZIF-8 particles and high mechanical properties for membranes. As a result, the MMMs with 8 wt% MWCNTs@ZIF-8 exhibited an excellent separation performance with CO 2 permeability of 186.3 Barrer and CO 2 /N 2 selectivity of 61.3, which surpassed the 2008 Robeson upper-bound. This study provided a new strategy for preparing high-performance CO 2 separation membranes.
研究领域:
材料科学
·
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 11
·e202405440
·
IF 2
Chenxiao Pei,Nan Wang,Yuqi Zhang,Yuhang Zhong,Xingang Liu,Jianyuan Hou,Yuan Yuan,Renxi Zhang
Graphical A novel UIO-66/Pebax® 1657 mixed matrix membrane is developed via air plasma modification, significantly enhancing CO₂ separation performance. The plasma treatment introduces ─NH₂ groups and active sites, improving interfacial compatibility and CO₂ adsorption. The membrane achieves a CO₂ permeability of 453 Barrer and CO₂/N₂ selectivity of 37.8 demonstrating superior gas separation efficiency and stability. This paper synthesized a new mixed matrix membrane for CO 2 separation. First, the metal-organic framework UIO-66 was treated with air plasma for modification and then embedded in Pebax® 1657. The 10% UIO-66/Pebax® 1657 mixed matrix membranes treated with air plasma significantly improved interfacial compatibility and CO 2 adsorption capacity, showing excellent performance. Its permeability reached 453 Barrer as CO 2 and the selectivity was 37.8 as CO 2 /N 2 . It was confirmed by characterization techniques such as FTIR, XRD, XPS, TGA, NMR, and SEM that the plasma successfully introduced ─NH 2 groups and active sites on the UIO-66 surface, thereby significantly improving the interfacial compatibility and adsorption characteristics of the mixed matrix membrane. In this study, the high-performance CO 2 separation membrane aP-UIO-66/Pebax was innovatively enhanced through the synergistic effects of graft modification and defect engineering on UIO-66 using nonthermal plasma technology. This approach offers a novel strategy for membrane performance optimization.
研究领域:
材料科学
·
环境工程
✓ 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）