| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.248 |
| 발표분야 | 복합재료 |
| 제목 | Nondestructive Evaluation of Thermal Treated Carbon Nanotube and Nanofiber/Composites Using Electro-Micromechanical Technique |
| 초록 | Electrical and mechanical properties of carbon nanomaterials (CNMs) reinforced epoxy composites depend on various parameters such as inherent properties of CNMs, the degree of dispersion, aspect ratio, shape and content, etc. Among them, the degree of dispersion is one of the very important factors affecting on electrical and mechanical properties. Nondestructive damage sensitivity and electrical properties of thermal treated carbon nanotube (CNT) and nanofiber (CNF)/epoxy composites were investigated using electro-micromechanical technique. Carbon black (CB) was also used for the comparison. To improve electrical and mechanical properties, the surface of CNT and CNF was thermally treated at 400 °C for 1 hour. Volumetric electrical resistance was measured with increasing temperature from 30 to 100 °C ranges for the untreated and thermal treated cases, respectively. For both the untreated and thermal-treated cases, CNT showed lower electrical resistance than CNF and CB. For the untreated case, electrical resistance increased with temperature for CNF and CB cases, whereas CNT showed a slight decrease. However, electrical resistance increased totally after thermal treatment for three CNMs. Apparent modulus and electrical resistance increased for thermal treated case than the untreated case. Acknowledgement: This work was financially supported from 'Center for Nanostructured Materials Technology' under '21st Century Frontier R&D program' of MST. Table 1 Weight decrease of CNT ,CNF, and CB with 3 different temperatures Fig. 1 Cyclic loading under same strain Fig. 2 Apparent modulus of CNT References 1. J. M. Park, D. S. Kim, J. R. Lee, T. W. Kim, Materials Science & Engineering C, 23, 971 (2003). 2. D. S. Kim, J. M. Park, T. W. Kim, Polymer(Korea), 28, 1 (2004). |
| 저자 | 김성주1, 정진규2, 박종만1, 김태욱2 |
| 소속 | 1경상대, 2공학(연) |
| 키워드 | Electro-micromechanical technique; Electrical resistance; Apparent modulus; Nondestructive damage sensitivity |
