INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Aisheng Huang,Bo Feng
Pristine graphene oxide (GO) sheets were pretreated with polyethyleneimine (PEI) to prepare PEI-modified GO (PEI-GO), which was further inserted with ZIF-8 crystals to form a novel PEI-GO@ZIF-8 nanocomposite for CO 2 capture. The good dispersion of PEI and interlayer growth of ZIF-8 within the GO sheets is helpful for high CO 2 adsorption. Therefore, the PEI-GO@ZIF-8 nanocomposite show high surface area and enhanced CO 2 adsorption capacity . The adsorption capacity of the PEI-GO@ZIF-8 nanocomposite was six times higher than that of the pristine GO and ZIF-8. The CO 2 /N 2 adsorption selectivity was significantly improved due to amine groups loading which provide more sites for CO 2 adsorption. The preferential adsorption of CO 2 over N 2 makes PEI-GO@ZIF-8 nanocomposite be a promising candidate in the field of CO 2 capture.
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高影响因子
ENERGY & FUELS
·
2026
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IF 6
Rui Zhang,Xiaopei Huang,Shiyin Wang,Yufan Li,Lianghong Zhou,Francesco Barzagli,Chao’en Li
Hydrogen permeation is a major challenge in high-pressure gaseous hydrogen storage and transportation. In this study, a series of novel polyethylenimine-modified graphene oxide/polyethylene-vinyl alcohol (PEI-GO-EVOH) composites were prepared and coated on a nylon substrate for hydrogen barrier applications. Hydrophilic PEI was employed to modify graphene oxide, thereby promoting the uniform dispersion of PEI-GO within the EVOH matrix. Various characterization techniques were used to investigate how PEI-GO influences the morphology, thermal stability, mechanical properties, adhesion, hydrophilicity, and hydrogen barrier performance of the composite coatings. GO-EVOH composites were also prepared and characterized for comparison. Compared to pure EVOH and GO-EVOH, PEI-GO-EVOH composites exhibited enhanced thermal and mechanical stability, along with significantly improved hydrogen barrier properties. Hydrogen bonding between the components was proven to play a dominant role in these property improvements. At a PEI-GO content of 2 wt %, the hydrogen permeability of PEI-GO-EVOH coatings decreased by 48.4% and 42.9% compared to the bare nylon substrate and the GO-EVOH coating, respectively. When benchmarked against reported hydrogen barrier systems, the PEI-GO-EVOH coating achieves competitive performance with lower filler loading, confirming its potential as a suitable hydrogen barrier coating for nonmetallic pipelines and hydrogen storage containers.
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DOI
高影响因子
MONATSHEFTE FUR CHEMIE
·
2023
·Vol. 154
·期 3
·367-377
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IF 1.8
Guo Xuejing,Zhang Yewen,Peng Yanqing
Application of solar thermal energy relies on photothermal effect is one of the emerging topics in green chemical research. Polyethylenimine-grafted graphene oxide (PEI@GO) can harvest thermal energy directly from visible light and be employed as photothermal catalyst in model reactions. Furthermore, this nanocomposite used in carbon dioxide capture-and-release processes relied on photothermal regeneration. Graphical abstract
研究领域:
材料科学
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纳米技术
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环境科学
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化学工程
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高影响因子
APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Xiaomin Song,Qi Huang,Bo Jin,Rufang Peng
To improve the encapsulation of GO to CL-20, PEI was utilized as a linker bridge to self-assemble into composite CL-20/PEI/GO in this study. The self-assembly was in-depth characterized, including Zeta potential, SEM, DLS, XPS, Raman spectra, HPLC and power-XRD. The possible self-assembled mechanism was also proposed, which indicates the electrostatic interaction introduced by PEI should be responsible for the self-assembly. The performance of a self-assembled composite was characterized by BAM and DSC analysis. And the results indicate the enhanced interaction promotes GO more efficiently encapsulate CL-20 and improve the safety of the energetic material. Therefore, this work demonstrates a novel and facile method to solve the deprived interaction and corresponding weak desensitization between desensitizer and energetic material.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
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IF 9
Xiaoyan Leng,Wei Qin,Ning Guo,Xinliang Liu,Ming Wang,Yingfei Hou
Dimethyl carbonate (DMC) is an eco-friendly organic compound, but its production process generates a methanol (MeOH)/DMC azeotrope, resulting in high energy consumption for separation. With its low energy consumption and environmental benefits, pervaporation membrane separation technology presents a promising solution for separating azeotropic organic mixtures. In this study, polyethyleneimine (PEI) is employed as the membrane material for the separation of MeOH/DMC, owing to its strong affinity for MeOH. However, the poor organic solvent swelling resistance is a significant challenge for the PEI matrix. Therefore, ultrahigh molecular weight PEI (Mn = 750,000) is utilized, and graphene oxide (GO) is incorporated to improve the organic solvent resistance of the PEI-based membrane. The results indicate that the optimized membrane demonstrates a total flux of 0.67 kg·m -2 ·h -1 and a separation factor of 89 for a 10 wt% MeOH/DMC mixture at 60°C. Notably, enhancing the molecular weight of PEI and introducing GO contribute to a significant improvement in the membrane's resistance to solvent swelling, breaking the trade-off between separation performance and swelling resistance. This work demonstrates the strong potential of PEI membrane materials for effective application in the separation of MeOH/DMC.
研究领域:
膜科学
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化学分离
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高分子材料
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环境工程
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化学工程
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高影响因子
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