海藻酸钠修饰碳纳米管的制备及性能

Preparation and performance of carbon nanotubes modified with sodium alginate

通过海藻酸钠(SAL)修饰多壁碳纳米管(MWNTs),改善MWNTs的水溶性和分散性。用1-乙基-3(3-二甲基氨基丙基)碳化二亚胺(EDC)为偶联剂,在水介质、弱酸性条件下,用超声波辅助法接枝水溶性高分子——海藻酸钠,得到修饰的碳纳米管复合物。红外光谱分析表明,多壁碳纳米管上的—COOH与海藻酸钠上的—NH2反应生成了—NHCO—,证明了MWCNTsSAL的生成,透射电镜测试显示海藻酸钠修饰的MWCNTs在乙醇中能够有效地克服团聚倾向;水溶性实验表明,改性后MWCNTs在水中具有分散性,并能够保持长时间的溶解能力。MWCNTs经SAL修饰后,改善了水溶性和分散性。

Using 1-ethyl-3 （3-dimethylamino-propyl） carbodiimide （EDC） as a coupling agent in aqueous media, under weakly acidic conditions, microwave-assisted method for grafting water-soluble polymer-alginate sodium, the modified carbon nanotube complexes were prepared. FY-IR spectroscopy analyses showed that the --COOH on the multi-walled carbon nanotubes reacted with sodium alginate --NH2 and formed --NHCO--.TEM images show that the modifed MWCNTs can be against their agglomerating force in ethanol. The functionalized carbon nanotubes can be dissolved in water. After modification by SAL, MWNTs＇s water solubility and dispersion are improved.