N, N-dimethylformamide surfactant methanol solution was developed to functionalize the surface of multi-waled carbon nanotubes (MWNTs). Carbon nanotubes reinforced epoxy composites with different concentrations were fabricated by sonicating functionalized MWNTs solution to epoxy resin. Stress-strain behavior of the composites at room temperature shows its elastic modulus firstly increases and then decreases with the loading. At 50 °C, the composites undergoes from the reversible visco-elasticity to plasticity and its elastic modulus, tensile strength affected clearly by temperature for the loading lower than 1%. For more than 1% loading, however, the mechanical properties degenerate clearly.
Lei, Z. K., Qiu, W., Li, Q., Kang, Y. L., & Pan, X. M. (2008). Mechanical properties of carbon nanotube polymer composites. Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering, 24(12). https://doi.org/10.5772/62635