Jia Li-Chuan, Jiao Zhong-Han, Yan Ding-Xiang, Li Zhong-Ming
College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China.
Polymers (Basel). 2017 Aug 27;9(9):397. doi: 10.3390/polym9090397.
In this paper, the dispersion of carbon nanotube (CNT) in ethylene vinyl acetate (EVA) is demonstrated to be significantly improved by the addition of octadecylamine (ODA)-grafted graphene oxide (GO) (GO⁻ODA). Compared to the CNT/EVA composite, the resultant GO⁻ODA/CNT/EVA (G⁻CNT/EVA) composite shows simultaneous increases in tensile strength, Young's modulus and elongation at break. Notably, the elongation at break of the G⁻CNT/EVA composite still maintains a relatively high value of 1268% at 2.0 wt % CNT content, which is more than 1.6 times higher than that of CNT/EVA composite (783%). This should be attributed to the homogeneous dispersion of CNT as well as the strong interfacial interaction between CNT and EVA originating from the solubilization effect of GO⁻ODA. Additionally, the G⁻CNT/EVA composites exhibit superior electrical conductivity at low CNT contents but inferior value at high CNT contents, compared to that for the CNT/EVA composite, which depends on the balance of CNT dispersion and the preservation of insulating GO⁻ODA. Our strategy provides a new pathway to prepare high performance polymer composites with well-dispersed CNT.
在本文中，通过添加十八烷基胺（ODA）接枝的氧化石墨烯（GO）（GO⁻ODA），碳纳米管（CNT）在乙烯-醋酸乙烯酯（EVA）中的分散性得到显著改善。与CNT/EVA复合材料相比，所得的GO⁻ODA/CNT/EVA（G⁻CNT/EVA）复合材料的拉伸强度、杨氏模量和断裂伸长率同时提高。值得注意的是，在CNT含量为2.0 wt%时，G⁻CNT/EVA复合材料的断裂伸长率仍保持相对较高的值1268%，比CNT/EVA复合材料（783%）高出1.6倍以上。这应归因于CNT的均匀分散以及源于GO⁻ODA增溶作用的CNT与EVA之间的强界面相互作用。此外，与CNT/EVA复合材料相比，G⁻CNT/EVA复合材料在低CNT含量下表现出优异的导电性，但在高CNT含量下表现较差，这取决于CNT分散与绝缘GO⁻ODA保留之间的平衡。我们的策略为制备具有良好分散CNT的高性能聚合物复合材料提供了一条新途径。
