通过化学方法在多壁碳纳米管(CNT)表面引入氨基,并利用超支化聚乙烯亚胺(PEI)将其桥接到金属有机骨架(MOFs),合成一种具有吸附CO2能力的新型复合材料。采用傅里叶红外光谱(FT-IR)、热重分析(TGA)、扫描电子显微镜(SEM)、CO2吸附-脱附等方法对制备的新型复合材料的吸附性能、热稳定性及形貌等进行表征。结果显示,通过添加超支化PEI制备的复合材料,具有优异的CO2吸附性能,其表面丰富的多氨基位点促进了CO2的存储。氨基化后的CNT与MOFs的协同作用,进一步改善了复合材料的CO2储存能力,吸附量达到462.33cm3/g,同时增强了材料的热稳定性能。
This paper chemically introduced amino groups on the surface of multi-wall carbon nanotubes (CNT) and bridged hyperbranched polyvinylenimine (PEI) to metal-organic frameworks (MOFs) to synthesize a new composite material with CO2 adsorption capability.The adsorption properties,thermal stability and morphology of the prepared composite materials were characterized by Fourier infrared spectroscopy (FT-IR),thermo-weight analysis (TGA),scanning electron microscopy (SEM),CO2 adsorption-desorption and other methods.The results showed that the composite material prepared by the addition of hyperbranched PEI had excellent CO2 adsorption properties,and the abundant polyamino sites on its surfaces facilitated CO2 storage.The synergistic effect of the aminated CNT and MOFs further improved the CO2 storage capacity of the composite,and the adsorption amount reached 462.33cm3/g,while enhancing the thermal stability of the material.
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