期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 492, 期 1-2, 页码 236-242出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2008.04.044
关键词
multi-walled carbon nanotubes; functionalization; epoxy resin; mechanical properties; thermal properties
类别
资金
- National Science Foundation of China [50772033, 50372020]
- Hunan Provincial Science and Technology of China [2006GK3102]
The functionalized multi-walled carbon nanotubes (MWNTs) with amino groups were prepared after such steps as oxidation, the addition of carboxyalkyl radicals, acylation and amidation. Besides oxidated-MWNTs/epoxy nanocomposites, amino-functionalized MWNTs/epoxy nanocomposites, in which MWNTs with amino groups acted as a curing agent and covalently attached into the epoxy matrix, were fabricated. Subsequently, the effects of MWNT content on the mechanical and thermal properties for the two systems were investigated. It is found that both the tensile strength and impact strength enhance with the increase of MWNT addition, and the most significant improvement of the tensile strength (+51 %) and especially impact strength (+93%) is obtained with amine-treated MWNTs at an 1.5 wt.% content. Moreover, the thermal stability of the nanocomposites also distinctly improves. The improvement of the properties of the amine-treated MWNTs system is more remarkable than those of o-MWNTs system. The reasons for these changes were discussed. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.
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