Interfacial Properties and Self-sensing of Single Carbon Fiber Reinforced CNT-Phenolic Nanocomposites using Electro-Micromechanical and Wettability Tests
Interfacial and other properties along with self-sensing were investigated for singlecarbonfiber/neat phenolic resins and carbon nanotube (CNT)-phenolicnanocomposites by electro-micromechanical and wettabilitytests. The apparent modulus was higher for samples with a singlecarbonfiber in CNT-phenolic nanocomposite than for samples with a singlecarbonfiber in neat phenolic resin, indicating better stress transfer. In water droplet contact angle measurements the contact angle increased form slightly less than 90° on neat phenolic resin to more than 90° on CNT-phenolicnanocomposites. This behavior was attributed to hydrophobic domains randomly distributed on the surface as a result of the heterogeneous microstructure of CNT. The work of adhesion between a singlecarbonfiber and CNT-phenolicnanocomposites was greater than for neat phenolic resin which is attributed to an increase in viscosity by adding CNT. Micro-failure patterns and interfacial adhesion between CNT-phenolicnanocomposites and singlecarbonfibers were consistent with these other results.