Performance Research On The Preparation And The Physical Properties Of Carbon Nanotubes/epoxy Composite

As a common industrial material, the epoxy resins are widely used in the field of the chemical engineering. Yet owing to the great amount of the epoxy group and the mass of the crosslinkage the epoxy resin are of large fragile and poor impact resistance and thermal resistance. While the carbon nanotubes, ever since they were found, have been admired for the excellent mechanical property, electronic property and so forth. In this paper, we took use of the carbon nanotubes and the epoxy resin to prepare a new kind of composite which is of great performance in the mechanical property, electronic property, and some operations were taken on as well to calculate some regular pattern in the formation of the network.In the research we improved the mechanical property, electronic property through the preparation of the carbon nanotube/ bismaleimide (BMI) blending system. What's more, we synthesized a new kind of carbon nanotube /diphenyl-methane-diisocyanate (MDI) composite based on the carbon nanotubes and diphenyl-methane-diisocyanate. Firstly, we treated the carbon nanotubes with the oxidizing acid and combined the carbon nanotubes with the diphenyl-methane-diisocyanate in dry N, N-Dimethylformamide (DMF). Besides, we combined the epoxy resin and the carbon nanotubes as well. And finally we took the two products and some assistant agent into curing and got the composites.In addition, we discussed the mechanical property, electronic property as well as the thermal property of the composite and worked on the Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) images, and reached up to the mechanisms of the content of carbon nanotubes, the carboxyl-terminated butadiene-acrylonitrile (CTBN) and the different process of the preparation and curing to get a goal of the best condition of the processing of the composite.