Le Cuong M Q, Cao Xuan Thang, Lim Kwon Taek
Department of Display Engineering, Pukyong National University, Busan, South Korea.
Department of Display Engineering, Pukyong National University, Busan, South Korea.
Ultrason Sonochem. 2017 Nov;39:321-329. doi: 10.1016/j.ultsonch.2017.04.042. Epub 2017 Apr 29.
A facile and environmentally friendly strategy for grafting polymers onto the surface of multi-walled carbon nanotubes (CNTs) was demonstrated by Diels-Alder "click chemistry". Firstly, the copolymers of poly(styrene-alt-maleic anhydride) (PSM) were prepared by the reversible addition-fragmentation chain transfer (RAFT) polymerization and subsequently functionalized with furfuryl amine to introduce anchoring groups. The copolymers were then grafted on CNTs via the Diels-Alder reaction in water through a conventional heating-stirring route and ultrasound-assisted method. The obtained nanocomposite materials were characterized by thermogravimetric analysis, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and transmission electron microscopy. The results indicated that the reaction rate under ultrasound irradiation was accelerated about 12 times than the one under the conventional heating-stirring condition without losing the grafting efficiency. The direct functionalization of CNTs formed a stably dispersed solution in water, promising a green and effective method for industrial process.
通过狄尔斯-阿尔德“点击化学”展示了一种将聚合物接枝到多壁碳纳米管（CNT）表面的简便且环保的策略。首先，通过可逆加成-断裂链转移（RAFT）聚合制备聚（苯乙烯-alt-马来酸酐）（PSM）共聚物，随后用糠胺进行官能化以引入锚定基团。然后，通过常规加热搅拌路线和超声辅助方法，使共聚物在水中通过狄尔斯-阿尔德反应接枝到碳纳米管上。通过热重分析、傅里叶变换红外光谱、X射线光电子能谱、拉曼光谱和透射电子显微镜对所得纳米复合材料进行了表征。结果表明，超声辐照下的反应速率比传统加热搅拌条件下的反应速率加快了约12倍，且不损失接枝效率。碳纳米管的直接功能化在水中形成了稳定分散的溶液，有望成为一种绿色有效的工业生产方法。
