| 초록 |
Studies on the use of natural fiber as replacement to man-made fiber in fiber reinforced composites have increased. Natural fibers have the advantages, such as their low cost, biodegradable, renewable and non-toxic properties. The major problem of biocomposite is the poor interfacial bonding between natural fiber and polymer matrix. In order to solve this problem, ramie fiber was treated by Ultra-Violet (UV). UV is effective to achieve both impurities removal and functional group formation on the surface of natural fibers for better bonding. We investigated the chemical changes of cellulose fiber by UV irradiation in several energy levels. To evaluated the effects of UV irradiation, the changes of α, β-cellulose composition and tensile strength were measured. In addition, structural changes of the fiber was investigated by SEM. The α-cellulose is decreased with increase of UV energy. The tensile stress is decreased with the decrease of α-cellulose. |
