A Synergetic Coupling between Graphene and Carbon Nanotubes for Hybrid Carbon Fiber Composites

摘要

Two different carbon based nanostructures, multiwall carbon nanotubes and multilayeredrngraphene, were incorporated to carbon epoxy laminated. X-ray diffractometryrnindicates an average particle size of 22 nm for the multi-layer graphene (MLG)rnnanostructures. TEM observations revealed a thickness of 10 graphene layers, and arnhybrid nanostructure where MWNT interpenetrated the MLG nanostructure. Thisrnhybrid nanostructure seems to be linked by Van der Walls bonds. This could be thernreason for large crack density generated during short-beam bending tests. Thesernnanostructures could also be the cause of improving the overall mechanical properties,rnin special the tensile and interlaminar shear strength, which are directly related to therninternal stress distribution and failure modes. A peak increase close to 19 % wasrnnotice into the tensile test while the interlaminar shear strength was improved byrn8.7%, both for single nanostructure, MLG and MWNT respectively.