| 초록 |
Natural fiber composites or biocomposites are emerging as a viable alternative to glass fiber composites, especially in automotive, building, and commodity applications. Henequen (Agave fourcroydes) is one of plant-based natural fibers like sisal, flax, jute, and hemp. It is long, hard, and strong fiber obtained from the 2-4 foot long leaves of agave plants, which is native to Yucatan, Mexico. Thermosetting unsaturated polyester (UP) and phenolic resins are not biodegradable but easily proccessible, inexpensive, and have good properties. Electron beam irradiation (EBI) techniques have been increasingly utilized for surface-modification and property enhancement of polymer materials like fibers, films, and composites for many years. EBI may effectively remove impurities and generate functional groups on natural fiber surfaces. In this study, the interfacial adhesion properties between the henequen and the resin and the fracture surface of the composites are investigated by a single-fiber microbonding test with a resin microdroplet formed on a single henequen fiber and scanning electron microscopic observations. Figs. 1 and 2 shows the interfacial shear strength (IFSS) measured for the natural fiber composites, respectively. Also, the thermal properties of henequen/UP and henequen/phenolic biocomposites reinforced with henequen fibers irradiated at different electron beam intensities have been preliminarily studied by means of DMA, TMA, and TGA methods. the result indicates that the interfacial and thermal properties of the biocomposites strongly depend on the EBI dose treated on the natural fiber surface.
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