化学接枝氨基化碳纳米管桥接金属有机骨架储存二氧化碳研究

Study on carbon dioxide storage using chemically grafted aminated carbon nanotubes bridged metal-organic skeletons

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CO_(2)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)、CO_(2)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CO_(2)吸附性能,其表面丰富的多氨基位点促进了CO_(2)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CO_(2)储存能力,吸附量达到462.33cm^(3)/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 CO_(2)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),CO_(2)adsorption-desorption and other methods.The results showed that the composite material prepared by the addition of hyperbranched PEI had excellent CO_(2)adsorption properties,and the abundant polyamino sites on its surfaces facilitated CO_(2)storage.The synergistic effect of the aminated CNT and MOFs further improved the CO_(2)storage capacity of the composite,and the adsorption amount reached 462.33cm^(3)/g,while enhancing the thermal stability of the material.