引用本文:
王国建, 屈泽华, 李岩, 刘琳. 超支化聚酯修饰多壁碳纳米管[J]. 应用化学,
2007, 24(7): 828-831.
Citation: WANG Guo-Jian, QU Ze-Hua, LI Yan, LIU Lin. Functionalization of Multiwalled Carbon Nanotubes with Hyperbranched Polyester[J]. Chinese Journal of Applied Chemistry, 2007, 24(7): 828-831.
Citation: WANG Guo-Jian, QU Ze-Hua, LI Yan, LIU Lin. Functionalization of Multiwalled Carbon Nanotubes with Hyperbranched Polyester[J]. Chinese Journal of Applied Chemistry, 2007, 24(7): 828-831.
超支化聚酯修饰多壁碳纳米管
摘要:
将碳纳米管先用V(H2SO4):V(HNO3)=3:1混合溶液进行处理,再用V(H2SO4):V(H2O2=4:1的混合溶液进一步酸化,制得含有羧基的碳纳米管。将羧基化碳纳米管与二氯亚砜反应使碳纳米管连接酰氯基团,利用酰氯基团与超支化聚酯上的羟基反应,将超支化聚酯接到碳纳米管的表面上,实现了碳纳米管的表面修饰。利用红外光谱、拉曼光谱、透射电镜观察分析测试结果表明,超支化聚酯以共价键形式连接到碳纳米管的表面。热失重分析结果表明,修饰密度为每321个C原子连接1个H20分子,每842个C原子上连接1个H40分子。修饰后的碳纳米管在有机溶剂中的溶解性能明显提高。
English
Functionalization of Multiwalled Carbon Nanotubes with Hyperbranched Polyester
Abstract:
Multiwall carbon nanotubes (MWNT) functionalized with H20 and H40 hyperbranched polyesters were synthesized.MWNT was first purified by a 3:1 concentrated H2SO4:HNO3 mixture and further acidified in a mixture of concentrated H2SO4:30% aqueous H2O2 of 4:1 for oxidizing into carboxylate group,then the carboxyl terminated MWNT reacted with SOCl2 to form MWNT-COCl.The MWNT-COCl was reacted with the hydroxyl of hyperbranched polymer to obtain the hyperbranched polymer functionalized MWNT.The characterized results of FTIR,Raman,TEM and TG proved the existence of covalently chemical bond between nanotube and hyperbranched polymerester.The coating density of H20 was that every 321 carbon atoms were connected with one polymer chain,while the coating density of H40 was that every 842 carbon atoms were connected with one polymer chain.The dispersion of MWNT in solvent after modification was better than the dispersion of MWNT in solvent before modification.
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