| 초록 |
The interfacial bonding strongly influences the mechanical properties of composite materials. In this study, a polyurethane-based adhesive material was used as the crosslinking material between CNTs and an epoxy matrix and also functioned as a jointer between the CNTs. Regions where two tips of CNTs were joined by PU molecules were observed by TEM. The PU functioned as both an interfacial bonding enhancer and a jointer of CNTs. Most of the CNTs were observed to be broken rather than just pulled out of the matrix in the fracture surface. Therefore, the tensile strength of the composite prepared with PU molecules was enhanced approximately twofold to 316MPa, which was substantially greater than that of the composite reinforced with only CNTs. This work demonstrates an effective method to enhance the mechanical properties of composites by adding linkage molecules. |
