JOURNAL OF APPLIED POLYMER SCIENCE
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2018
·Vol. 135
·期 46
·46759
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IF 1.901
Mingmin Jia,Yi Feng,Jianhao Qiu,Xiaocheng Lin,Jianfeng Yao
UiO-66-NH 2 nanocrystals were synthesized and embedded into bromomethylated poly(phenylene oxide)/polyethersulfone (BPPO/PES) polymer matrix to form UiO-66-NH 2 /BPPO/PES mixed matrix membranes (MMMs). The crystalline structure, interaction between UiO-66-NH 2 and BPPO, and dispersion of UiO-66-NH 2 were characterized by FTIR, XRD, and SEM. Nanoparticle dispersion was drastically enhanced with the assistance of BPPO, giving an improved adhesion between the polymer and filler particles. Owing to the intrinsic adsorption property of UiO-66-NH 2 and BPPO to CO 2 , the CO 2 permeability was significantly increased. As a result, the UiO-66-NH 2 /BPPO/PES membrane exhibited enhanced gas separation performance, where CO 2 /N 2 and H 2 /N 2 ideal selectivities were increased to 50.2 and 302.4 with a CO 2 permeability of 125.6 Barrer. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46759.
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
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2020
·Vol. 21
·期 16
·5782
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IF 4.556
Md Mofasserul Alam,Yaoming Wang,Chenxiao Jiang,Tingting Xu,Yahua Liu,Tongwen Xu
Ion-exchange membranes are the core elements for an electrodialysis (ED) separation process. Phase inversion is an effective method, particularly for commercial membrane production. It introduces two different mechanisms, i.e., thermal induced phase separation (TIPS) and diffusion induced phase separation (DIPS). In this study, anion exchange membranes (AEMs) were prepared by grafting a quaternized moiety (QM,2-[dimethylaminomethyl]naphthalen-1-ol) through brominated poly (2,6-dimethyl-1,4-phenylene oxide) (BPPO) via the TIPS method. Those membranes were applied for selective bisulfite (HSO3−) anion separation using ED. The membrane surface morphology was characterized by SEM, and the compositions were magnified using a high-resolution transmission electron microscope (HRTEM). Notably, the membranes showed excellent substance stability in an alkali medium and in grafting tests performed in a QM-soluble solvent. The ED experiment indicated that the as-prepared membrane exhibited better HSO3−separation performance than the state-of-the-art commercial Neosepta AMX (ASTOM, Japan) membrane.Keywords:anion exchange membranes;BPPO;quaternized moiety;grafting;phase inversion;bisulfite;separation;electrodialysis
研究领域:
化学工程
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材料科学
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环境工程
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2024
·
IF 2.7
Yong Chen,Shengxuan Fan,Chao Peng,Bingyue Song,Mengting Qin,Yi Wang,Yanjun Huang,Shefeng Li,Lei Zhang
Diffusion dialysis (DD) with anion exchange membranes (AEMs) as the core component is an ideal technology for acid recovery from acidic wastewater. Herein, a series of TEA–BPPO AEMs were prepared from triethanolamine (TEA) and brominated polyphenylene ether (BPPO) using the solution casting method. The structures of the prepared membranes were characterized and analyzed through nuclear magnetic resonance hydrogen spectroscopy (1H NMR), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). In addition, the properties of the membranes, such as ion exchange capacity (IEC), linear swelling rate (LSR), water uptake (WU), chemical stability, thermal stability and mechanical stability, were explored. In DD experiments, the optimal AEM (i.e., TEA–BPPO–M80) applied to simulate acid recovery from a mixed HCl (1 mol L−1)/FeCl2 (0.2 mol L−1) solution exhibited an acid dialysis coefficient (UH+) of 0.0629 m h−1 and separation factor (S) of 97.78, which were significantly better than those of the commercial membrane DF-120. In addition, the TEA–BPPO–M80 AEM exhibited excellent thermal stability and acid resistance. In summary, the prepared membranes possess great potential for application in DD acid recovery.
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
SEPARATION SCIENCE AND TECHNOLOGY
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2021
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IF 2.475
Muhammad Imran Khan,Javier Fernandez-Garcia,Qi-Long Zhu
Herein, a series of doubly charged anion-exchange membranes (AEMs) were fabricated by incorporating a different amount of N-butyl substituted 1,4-diazabicyclo [2.2.2] octane (BDABCO) into brominated poly (2,6-dimethyl-1,4-phenylene oxide) (BPPO) via Menshutkin-reaction. The successful preparation of AEMs was confirmed by Fourier transform infrared (FTIR) spectroscopy. These AEMs were characterized physicochemically in detail. These AEMs showed higher thermal, mechanical and chemical stability. The AEM with higher concentration of BDABCO exhibited hydroxide (OH−) conductivity of 50.9 mS/cm and 84 mS/cm at 30°C and 80°C, respectively. This demonstrated the as-prepared AEMs would be potential candidates for anion-exchange membrane fuel cells.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
Energy Technology
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2018
·Vol. 6
·期 11
·2264-2272
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IF 3.175
Xupo Liu,Yunfeng Zhang,Yazhou Chen,Cuicui Li,Jiaming Dong,Jiaying Wang,Zehui Yang,Hansong Cheng
Low methanol permeability is one of the most critical factors for proton exchange membranes utilized in direct methanol fuel cells (DMFCs). Here, sulfonated poly(ether ether ketone) (SPEEK) polymer chains are interpenetrated into the semi-interpenetrating polymer networks (semi-IPNs) constructed by the alkylation reaction between bromobenzyl groups of bromomethylated poly(phenylene oxide) and amine groups of 2,2′-(ethylenedioxy)bis(ethylamine) cross-linker. The influences of crosslinking network contents on the key properties of SPEEK membranes are systematically investigated. Dimensional stability and methanol-permeability resistance are enhanced as the increase of the crosslinking network contents. The relative selectivity is significantly improved due to the largely reduced methanol permeability. The DMFC assembled by the membrane with 20 wt.% crosslinking networks demonstrates four times higher power output than the Nafion 117 DMFC in 5 M methanol solution.
研究领域:
材料科学
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能源科学
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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）