聚酰胺-胺树状分子接枝到方法修饰多壁碳纳米管

摘要

采用聚酰胺-胺树状分子(PAMAM)"接枝到"这一温和而简单易行的方法修饰多壁碳纳米管(MWCNTs).制备了一种树状分子/碳纳米管(MWCNTs-g-PAMAM)纳米复合材料.在水、甲醇和乙醇等极性溶剂中,该复合材料具有很好的分散性.通过傅立叶变换红外光谱(FTIR)、X-射线光电子能谱(XPS)、热重分析(TGA)和透射电子显微镜(TEM)等对MWCNTs-g-PAMAM纳米复合材料进行了表征.FTIR表明接枝修饰是PAMAM与MWCNTs的共价键结合,TCA数据表明PAMAM成功修饰于MWCNTs侧壁,且接枝到MWCNTs上PAMAM的量随其代数(G1.0～G4.0)的不同而不同,具体顺序为G2.0>G1.0≈G3.0>G4.0.%A mild and facile way was used to prepare poly (amidoamine)-grafted muti-walled carbon nanotubes (MWCNTs-g-PAMAM) nanocomposites via "grafting to" method. The MWCNTs-g-PAMAM nanocomposites are well dispersible in polar solvents such as water, methanol and ethanol. Chemical structure of the resulting product was characterized by Fourier transform infrared(FTIR), X-ray photoelectron spectra(XPS), thermal gravimetric analyses (TGA) and transmission electron microscopy(TEM). FIIR showed that the "grafting to" process belonged to covalent attachment mechanisms. TGA data also showed that the PAMAM dendrimers were successfully grafted to the side wall of MWCNTs, and the relative weight of PAMAM grafted onto the MWCNTs surface was in the order G2.0>G1.0≈G3.0>G4.0.