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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。
Multi-walled carbon nanotubes (MWNTs) are modified by sodium alginate (SAL) to improve the water solubility and dispersibility of MWNTs. Using 1-ethyl-3 (3-dimethylaminopropyl) carbodiimide (EDC) as coupling agent, the water-soluble polymer- Sodium alginate to obtain a modified carbon nanotube composite. Infrared spectrum analysis showed that -COOH on multi-walled carbon nanotubes reacted with -NH2 on sodium alginate to produce -NHCO-, which proved the formation of MWCNTsSAL. Transmission electron microscopy showed that sodium alginate-modified MWCNTs could be effective in ethanol To overcome the reunion tendency; water-soluble experiments show that the modified MWCNTs disperse in water, and can maintain a long period of dissolution. MWCNTs modified with SAL to improve water solubility and dispersibility.