| Summary: | 碩士 === 朝陽科技大學 === 應用化學系碩士班 === 99 === In this study, the reinforced fibers from pineapple leaf fiber and recycled disposable chopsticks fiber were obtained through exposure, drying, grinding and sifting. The surfaces of fibers were chemically modified by triethoxy-vinylsilane (Z-6060) to improve the compatibility between the natural plant fibers and polymer matrix. Then, the novel plant fibers/polylactic acid (PLA) green composites were prepared through melt-blending method.
The results show that the addition of silane-treated plant fiber can enhance the interfacial adhesion between PLA and plant fibers. Moreover an improvement in mechanical and thermal properties was also observed. The tensile and flexural strengths of PLA were improved about 60% and 66% when reinforced with 30 wt% modified fibers. In the aspect of thermal properties, the HDT of pure PLA can be increased from 80.9OC to 141.9OC with the addition of 30 wt% modified fibers, and the improvement was about 75%. Apart from enhancing the mechanical properties and thermal stability, the incorporation of natural fibers can reduce the production cost of materials while meeting the demands of environmental protection agencies.
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