Silane Functionalization of MWNTs Improves the Mechanical Properties of MWNT/Epoxy Nanocomposites

摘要

With unique structural and transport properties, such as excellent strength, modulus, electrical and thermal conductivities along with low density, carbon nanotubes (CNTs) have attracted much interest as the reinforcement for polymer matrix composites. The CNT/polymer nanocomposites hold the promise of delivering exceptional mechanical properties and multi-functional characteristics. To ensure effective reinforcements for polymer composites, proper dispersion and good interfacial bonds between the CNTs and the polymer matrix have to be guaranteed. To achieve these, many surface treatment and functionalization techniques have been devised with varied successes. In the present work, improved dispersion and interfacial adhesion of multi-walled carbon nanotubes (MWNTs) with an epoxy matrix is achieved through functionalization using a silane coupling agent. The effects of functionalization are studied on the mechanical and electrical properties of the MWNT/epoxy nanocomposites.