对多壁碳纳米管（MWCNTs）分别进行共价、非共价和混杂功能化改性,然后采用溶液共混法,将三种功能化类型的MWCNTs按不同质量分数分别加入环氧树脂（EP）制备MWCNTs/EP复合材料。通过拉伸试验和热重分析,研究MWCNTs的功能化类型及含量对复合材料力学性能和热学性能的影响,并对复合材料拉伸试件断面进行SEM观察分析。结果表明：与共价功能化复合材料（MWCNTs-Epon828/EP）和非共价功能化复合材料（MWCNTs-PPA/EP）相比,混杂功能化复合材料（MWCNTs-Epon828-PPA/EP）的力学性能和热学性能最佳。当MWCNTs质量分数为0.3%时,其拉伸强度、弹性模量和断裂伸长率较纯EP分别提高30%,62%和26%。
The multi-walled carbon nanotubes（MWCNTs） were modified by covalent,noncovalent,or hybrid functionalization respectively.By means of solution blending,three types of functionalized MWCNTs were incorporated into the epoxy resin（EP） with various mass fractions to prepare MWCNTs/EP composites.The effect of the content and functionalization method of MWCNTs on the mechanical and thermal properties of the composites was studied through tensile test and thermal gravimetric analysis.The fracture sections of the tensile specimen were examined by SEM.The results indicate that the hybrid functionalized composites（MWCNTs-Epon828-PPA/EP） exhibit the best mechanical and thermal properties comparing with covalent and noncovalent functionalized composites（MWCNTs-Epon828/EP,MWCNTs-PPA/EP）.With 0.3% mass fraction of MWCNTs,the tensile strength,elastic modulus,and the elongation at break increase by 30%,62%,and 26% compared with that of the pure EP,respectively.
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