| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.125 |
| 발표분야 | 복합재료 |
| 제목 | Interfacial Evaluation of Modified Kenaf and Ramie Fibers/Epoxy Composites by Micromechanical Test and Acoustic Emission |
| 초록 | Interfacial shear strength (IFSS) of environmental friendly natural fiber reinforced polymer composites play an important role in controlling the overall mechanical properties. If the IFSS is low, it is so difficult to get good mechanical properties. Whereas it is too high, matrix cracks will propagate across the reinforcing fibers. In this work, IFSS of various Ramie and Kenaf fibers/epoxy systems was evaluated using the combination of micromechanical test and nondestructive acoustic emission (AE) to find out an optimal condition. Comparison of contact angle of Kenaf and Ramie fibers before and after surface treatment in NaOH solution showed that the contact angle of the treated fiber significantly decreased (Fig. 1). It may be because some chemical components such as lignin, wax, and hemicelluloses which have poor interfacial adhesion could be modified during treating process. On the other hand, the mechanical properties of the natural fibers were investigated using single fiber tensile test and analyzed statistically by both uni- and bimodal weibull distributions. In Fig. 2, Microfailure mechanism of different natural fibers/epoxy systems under tension and compression were observed using optical microscope and determined indirectly by AE and their FFT analysis. Acknowledgement: this study was financially supported by MOST-MOCIE of Korea under contract No. M10436010010-04L3601-01-000. Fig. 1 Contact angles of (a) single Kenaf and (b) Ramie fibers Fig. 2 Microfailure modes in tension and compression of (a) Kenaf and (b) Ramie fiber/epoxy system References 1. G. Cantero, A. Arbetaiz, R. L. Ponte, I. Mondragon, Composites Science and Technology, 63, 1247 (2003). 2. R. Joffea, J. Andersonsb, L. Wallsreoma, Composites Part A, 34, 603 (2003). |
| 저자 | 트란콩손1, 정진규2, 박종만1, 황병선2 |
| 소속 | 1경상대, 2공학(연) |
| 키워드 | Interfacial shear strength (IFSS); Acoustic emission (AE); Natural fiber; Biodegradable materials; Dynamic contact angle |
