ABSTRACT

The aim of this investigation is to enhance the thermal and viscoelastic performance of flax strengthened epoxy with graphene nanoplatelets (GNP). GNP was incorporated at various weight percentages with epoxy resin. Scanning Electron Microscopy (SEM) studies revealed a uniform and well-dispersed GNP with a few agglomerations and voids. Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), and Dynamic Mechanical Analysis (DMA) were used to evaluate the thermal degradation and viscoelastic properties. The flax strengthened epoxy with 0.1 wt-% GNP witnessed a 17% increase in initial degradation temperature and a 48% increase in char residue. Observations from the DSC revealed that GNP functioned as a thermal barrier due to its strong influence on the glass transition and crystallisation temperature of composites. The DMA findings indicated that the storage and loss modulus of GNP/flax strengthened epoxy increased by 18% and 25%, respectively.

摘要

这项研究的目的是通过石墨烯纳米片（GNP）增强亚麻增强环氧树脂的热和粘弹性。GNP以各种重量百分比与环氧树脂混合。扫描电子显微镜（SEM）研究显示均匀且分散良好的GNP，且有少量团聚和空隙。差示扫描量热法（DSC），热重分析（TGA）和动态力学分析（DMA）用于评估热降解和粘弹性。具有0.1 wt％GNP的亚麻增强环氧树脂的初始降解温度提高了17％，炭渣的增加了48％。DSC的观察表明，由于GNP对复合材料的玻璃化转变和结晶温度有强烈影响，因此GNP起到了热屏障的作用。