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Interfacial Properties and Self-sensing of Single Carbon Fiber Reinforced CNT-Phenolic Nanocomposites using Electro-Micromechanical and Wettability Tests

Year: 2011

Journal: Composites Part B: Engineering 2012, 43 (3) pp 1171-1177, 20121211

Authors: Joung-Man Park, Zuo-Jia Wang, Dong-Jun Kwon, Ga-Young Gu, Woo-Il Lee, Jong-Kyoo Park, K. Lawrence DeVries

Organizations: School of Materials Science and Engineering, Engineering Research Institute, Gyeongsang National University, Jinju 660-701, Republic of Korea, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea, Agency for Defense Development, 4-R&D Center, Daejeon 305-600, Republic of Korea, Department of Mechanical Engineering, The University of Utah, Salt Lake City, UT 84112, USA

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.