Mechanical and Microstructural Analysis of Carbon nanotube Composites Pretreated at Different Temperatures

摘要

Carbon nanotube (CNT) based epoxy composites have been fabricated and were subjected to different temperature conditions. Flexural moduli and hardness of all samples were determined. The resulting composites demonstrated enhanced physical properties due to the addition of high strength CNTs. Effect of temperature on mechanical properties of composites has been examined microscopically by SEM through fracture surface. Results confirmed that nanocomposites pretreated with hot water are found to be tough and those treated in liquid nitrogen are brittle. Uniform distribution of CNTs in the matrix and bridging of crack initiation by CNTs contribute to maintain structural integrity under variable temperature.