Pebax/MWCNTs-NH2 mixed matrix membranes for enhanced CO2/N2 separation
Pebax/MWCNTs-NH2 mixed matrix membranes for enhanced CO2/N2 separation
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用于增强 CO2/N2 分离的 Pebax/MWCNTs-NH2 混合基质膜
DOI：
10.1002/ghg.1970
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Yutaka Kitamura
中科院分区：
文献类型：
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作者：
Chunfeng Song;M. Muhammad;Run Li;A. Siraj;Qingling Liu;Bing Zhang;Yutaka Kitamura
混合基质膜在气体分离中具有广阔的应用前景。然而，渗透性和选择性之间的权衡仍然是其商业应用的挑战。无机填料的合理设计、填料与聚合物的相容性以及填料在聚合物中的分散性对膜的形态和分离性能有重要影响。在本研究中，为了生产无缺陷的平板MMM，研究了两种不同的溶剂（N-甲基-2-吡咯烷酮和乙醇/水），以最大限度地提高Pebax中填料（多壁碳纳米管，MWCNT）的分散度。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）分析对所制备的膜进行表征。通过CO2/N2渗透实验考察了溶剂对膜渗透性能的影响。结果表明，溶剂摩尔体积越大，制得的膜对CO2的分离效果越好。考虑到不同参数（溶剂摩尔体积、无馏分体积、膜结晶度）之间的权衡，Pebax/MWCNTs MMM的渗透率和CO2/N2选择性分别优化为405 Barrer和51。© 2020化学工业协会和John Wiley & Sons，Ltd.
Mixed matrix membranes (MMMs) played a promising role in gas separation. However, the trade‐off between permeability and selectivity is still a challenge for its commercial application. Rational design of the inorganic filler, compatibility of filler with the polymer, and dispersion of filler into the polymer have a significant influence on the morphology and separation performance of a membrane. In this study, in order to produce defect‐free flat sheet MMMs, two different solvents (N‐methyl‐2‐pyrrolidone and ethanol/water) were investigated to maximize the dispersion of filler (multi‐walled carbon nanotubes, MWCNTs) in Pebax. The prepared membranes were characterized by scanning electron microscope (SEM), Fourier‐transform infrared spectroscopy (FTIR), and X‐ray diffraction (XRD) analysis. CO2/N2permeation tests were undertaken to investigate the solvent effect on membrane permeation properties. The result showed that membranes fabricated with higher molar volume solvent were more efficient for CO2separation. Considering the trade‐off between different parameters (molar volume of solvent, fraction‐free volume, crystallinity of membranes), the permeability and CO2/N2selectivity of Pebax/MWCNTs MMMs was optimized to 405 Barrer and 51, respectively. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd.