This study investigates the flexural properties of multi-walled carbon nanotube (MWCNT) reinforced basalt/epoxy composites under conditions with and without moisture absorption. The basalt/CNT/epoxy composites were fabricated using 1 wt% silanized MWCNTs and kept in seawater for over 4 months. The flexural properties of the moisture absorbed specimens were evaluated and compared with those of dry specimens. The flexural properties of basalt/CNT/epoxy composites were found to decrease with moisture absorption. The flexural strength and modulus of moisture absorbed specimens were 22% and 16% lower, respectively, than those of the dry specimen. Scanning electron microscope examination of the fracture surfaces revealed that the decreases of flexural properties in the moisture absorbed specimen were due to the weakening of interfacial bonding from swelling of the epoxy matrix.

• Man-Tae Kim(Department of R&D, Gumi Electronics & Infomation Technology Research Institute)
• Kyong-Yop Rhee(School of Mechanical Engineering, Kyung Hee University) Corresponding Author
• Hyeon-Ju Kim(Ocean Pant Research Division, Korea Institute of Ocean Science & Technology)
• Dong-Ho Jung(Ocean Pant Research Division, Korea Institute of Ocean Science & Technology)