摘要
利用TEM、XPS、XRD、SEM等测试手段对硝酸处理前后的碳纳米管(CNTs)的状态、结构特性、分散特性及复合材料的端面特征进行了研究。结果表明:浓硝酸氧化处理后CNTs表面的活性官能团有明显增加,CNTs在极性溶剂中分散的均匀性、浓度和稳定性得到提高,在复合材料中的分布均匀性及与树脂的界面结合能力也得到改善,表明浓硝酸氧化是实现CNTs表面改性的一种有效方法。
In this study, carbon nanotubes （CNTs） were oxidized by nitric acid of different concentration. The dispersive state in ethanol and the surface functional groups of CNTs before and after oxidation and the fracture morphologies of CNTs/epoxy composites were compared and analysed by TEM, XPS, XRD, SEM measurements. It was found that, after treatment by concentrated HNO3 ,the dispersion state and adding weight in ethanol are remarkably increased and the modified CNTs suspension have higher dispersibility and stability, and the treatment of nitric acid oxidation is an effective method for surface activation of the CNTs.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2008年第2期34-38,共5页
Aerospace Materials & Technology
关键词
碳纳米管
硝酸氧化
表面改性
复合材料
Carbon nanotubes, Nitric acid oxidation, Surface modification
