Modification of single-walled carbon nanotubes and its influence on the interfacial strength in polymeric composites
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Single-walled carbon nanotubes was purified and modified with dichlorocarbene, HNO3 or octadecylamine and incorporated in polymeric matrices of polycarbonate and epoxy. Exposing the composite material to a tensile strain and measuring the shift of the G′-band revealed that higher loads could be transferred to the HNO3-modified carbon nanotubes. Exfoliation was regarded as the main reason for the increased interfacial strength resulting in larger specific surface area and higher hydrostatic compressive stresses on the nanotube bundles.
KeywordsInterfacial Strength Interfacial Shear Strength Octadecylamine Cohesive Energy Density Individual Nanotubes
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