椰壳纤维毡/环氧树脂复合材料的力学性能研究

A Study on Mechanical Properties of Coir Fiber Mat/Epoxy Composites

摘要: 天然纤维增强高分子复合材料因其成本低，性能优越及可降解性等优点，在室内外装饰装修、运输、景观设计、汽车等方面得到广泛应用。本文采用椰壳纤维毡，通过浸渍工艺制备椰壳纤维/环氧树脂复合材料。借助万能试验机、扫描电镜(SEM)和动态热机械分析仪(DMA)等研究复合材料的力学性能、形态和耐热性等。结果表明，椰壳纤维可有效改善环氧树脂的力学性能。弯曲强度和冲击强度分别提高了190%和42.4%；SEM证实椰壳纤维与环氧树脂具有较好的界面性能；DMA表明经椰壳纤维增强后，复合材料的耐热性增加，玻璃化转变温度提高了7℃。

Abstract: Natural fiber reinforced polymer composites have been widely used in indoor and outdoor decoration, transportation, landscape de-sign, automobile and other aspects due to their low cost, superior performance and degradability. This article used coir fiber mat felt to prepare coir fiber/epoxy resin composite through an impreg-nation process. The mechanical properties, morphology, and heat resistance of composites were in-vestigated using a universal testing machine, a scanning electron microscopy (SEM), and the dy-namic thermal mechanical analyzer (DMA). The results indicate that coir fiber could effectively improve the mechanical properties of epoxy resin. The flexural strength and impact strength are in-creased by 190% and 42.4%, respectively. SEM confirmed that coir fiber had good interfacial prop-erties with epoxy resin; DMA showed that after being reinforced with coir fiber, the heat resistance of the composite material increases and the glass transition temperature increases by 7˚C.