Flame Retardancy of Rice Husk / Polypropylene Natural Fiber Composites

• Main Authors: Hsiao-Ching Chang, 張筱青
• Other Authors: Shu-Kai Yeh
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/ky2hk9

碩士 === 國立臺北科技大學 === 化學工程研究所 === 102 === In this study, rice husk/polypropylene composites filled with graphene nanoplatelets, graphene and two kinds of inorganic flame retardants, aluminum hydroxide (ATH) and magnesium hydroxide (MH), were compounded using a Brabender Plasticorder. The dispersion of graphene nanoplatelets and graphene in composites were characterized by x-ray diffraction (XRD). The flammability of natural fiber composites of different formulations was evaluated by ASTM D635 and UL-94. Moreover, the mechanical properties of natural fiber composites were determined by ISO 527 and ASTM D256, respectively using a tensile testing machine and an Izod impact tester. The results showed that no peak was detected in the XRD spectrum for graphene reinforced rice husk/polypropylene composites. It indicated that there was no agglomeration occurs during the mixing process. The horizontal burning test results showed that plain 50 wt% PP/rice husk composites showed a horizontal burning rate of 36.08 mm/min. When flame retardant or nanographte was added in the composite, the burning rate reduced to 20 mm/min. On the other hand, a synergetic effect were observed when graphene nanoplatelets were used in conjunction with aluminum hydroxide (ATH) or magnesium hydroxide (MH).The horizontal burning rate was significantly reduced. Besides, materials were self-extinguished during testing period under some circumstances. The horizontal burning rate of these samples could be as low as 5.66 mm/min.