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Interfacial Evaluation of Single-Carbon Fiber/Phenolic and Carbon Nanotube-Phenolic Composites Using Micromechanical Tests and Electrical Resistance Measurements

Wang, Zuo-Jia (School of Materials Science and Engineering, Engineering Research Institute Gyeongsang National University)
Kwon, Dong-Jun (School of Materials Science and Engineering, Engineering Research Institute Gyeongsang National University)
Gu, Ga-Young (School of Materials Science and Engineering, Engineering Research Institute Gyeongsang National University)
Park, Jong-Kyoo (4-R&D Center, Agency for Defense Development)
Lee, Woo-Il (School of Mechanical and Aerospace Engineering, Seoul National University)
Park, Joung-Man (School of Materials Science and Engineering, Engineering Research Institute Gyeongsang National University)

Publication Information

Journal of Adhesion and Interface / v.11, no.4, 2010 , pp. 149-154 More about this Journal

Abstract

Interfacial evaluation was investigated for single-carbon fiber/phenolic and carbon nanotube (CNT)-phenolic composites by micromechanical technique and electrical resistance measurement combined with wettability test. Compressive strength of pure phenol and CNT-phenolic composites were compared using Broutman specimen. The contact resistance of CNT-phenolic composites was obtained using a gradient specimen by two and four-point methods. Surface energies and wettability by dynamic contact angle measurement were measured using Wilhelmy plate technique. Since hydrophobic domains are formed as heterogeneous microstructure of CNT in the surface, the dynamic contact angle exhibited more than $90^{\circ}$ . CNT-phenolic composites exhibited a higher apparent modulus than neat phenolic case due to better stress transferring effect. Work of adhesion, $W_a$ between single-carbon fiber and CNT-phenolic composites exhibited higher than neat phenolic resin due to the enhanced viscosity by CNT addition. It was consistent with micro-failure patterns in microdroplet test.

Keywords

CNT-phenol composites; electro-micromechanical technique; stress transfer; wettability; work of adhesion;

Citations & Related Records

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