摘要
采用聚季铵盐修饰的方法合成了水溶性的多壁碳纳米管(MWNTs)。用混酸(浓硫酸与浓硝酸,体积比为3∶1)对平均直径为20 nm的MWNTs进行氧化处理。红外光谱分析表明,氧化1 h^3 h可使MWNTs表面生成羧基,扫描电镜测试表明MWNTs被氧化为短管。氧化2 h的MWNTs经过与氯化亚枫的酰氯化及与聚季铵盐的脂化缩合两个反应步骤,合成了表面接枝聚季铵盐的MWNTs,红外光谱分析证明了该MWNTs的生成。透射电镜测试显示聚季铵盐修饰的MWNTs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的MWNTs在水中具有自分散性,并能够保持长时间的溶解能力。
The method that allows multi - walled carbon nanotubes (MWNTs) to be covalently bonding polyquaternium salt to improve water - solubility of the MWNTs. After mixed acid ( oil of vitriol and dense nitric acid, ratio by volume was 3 : 1 ) oxidation of MWNTs ( average diameter was 20 nm) for 1 h - 3 h, FF - IR spectroscopy analyses show that carboxyl was generated on the MWNTs and SEM images show that the MWNTs were cut short. The polyquaternized MWNTs were produced through two step : chlorinationation of the MWNTs after oxidation for 2 h to form pendant acyl chloride groups, and esterification condensation reaction of the resulting MWNTs with the polyquaternium salt. The esterification condensation reaction was verified by FF - IR spectroscopy. TEM images show that the modified MWNTs can be against their agglomerating force in ethanol. The solubility experiments show that the functionalized carbon nanotubes can be dissolved in water.
出处
《黑龙江大学自然科学学报》
CAS
北大核心
2007年第6期787-790,794,共5页
Journal of Natural Science of Heilongjiang University
基金
黑龙江省教育厅资助项目(1151302)
黑龙江省科技厅资助项目(LC06C18)
黑龙江大学青年基金项目(Q200330)
关键词
水溶性碳纳米管
聚季铵盐
高分子修饰
water - soluble carbon nanotube
polyquaternium salt
polymer modification