The nitrogen-doped porous carbons/PIM mixed-matrix membranes for CO2 separation
The nitrogen-doped porous carbons/PIM mixed-matrix membranes for CO2 separation
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DOI：
10.1016/j.memsci.2018.07.075
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发表时间：
2018-10
影响因子：
9.5
通讯作者：
Hongyong Zhao;Lizhong Feng;Xiaoli Ding;Yun Zhao;X. Tan;Yuzhong Zhang
中科院分区：
文献类型：
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作者：
Hongyong Zhao;Lizhong Feng;Xiaoli Ding;Yun Zhao;X. Tan;Yuzhong Zhang
通过对离子液体(ILS)/本征微孔聚合物(PIM)共混膜的热处理制备了含氮多孔炭(NDPC)/本征微孔聚合物(PIM)混合基膜(MMMs)，其中含腈的离子液体经热处理后形成具有三维连通骨架的NDPC。用傅里叶变换红外光谱对其进行了化学表征。用热重分析法研究了聚合物的热性能。用广角X射线衍射法测定了MMMS的平均链距。用低温氮气吸附-脱附分析对其孔结构进行了表征。用场发射扫描电子显微镜观察了膜的形貌。报道了NDPC/PIM金属基复合材料的气体传输特性。讨论了气体输运性质与物性之间的关系。与原始的PIM-1膜相比，NDPC/PIM MMM表现出更高的CO2透过率，但代价是CO2/N2选择性略有降低。CO_2/N_2的良好渗透分离性能超过了罗伯逊上限线。
Nitrogen-doped porous carbons (NDPC)/polymer of intrinsic microporosity (PIM) mixed-matrix membranes (MMMs) were fabricated via a thermal treatment of the ionic liquids (ILs)/PIM blending membranes, in which the nitrile-containing ILs reacted and formed the NDPC with three-dimensional-connected frame-works after the thermal post-treatment. The chemical characterization was performed by Fourier transform infrared spectroscopy. The thermal property was investigated by thermo-gravimetric analysis. The average inter-chain distance of the MMMs was evaluated by wide-angle X-ray diffraction. The porous structure was evaluated by low-temperature N2adsorption-desorption analysis. The membrane morphology was investigated by field-emission scanning electron microscopy. The gas transport property of the NDPC/PIM MMMs was reported. The relationship between gas transport property and physical properties was also discussed. Compared with the original PIM-1 membrane, the NDPC/PIM MMMs displayed much higher CO2permeability at the cost of an acceptable, slight reduction in CO2/N2selectivity. The outstanding permeation-separation performance for CO2/N2exceeds the Robeson upper bound line.