纤维素增强环氧树脂复合材料热解特性研究

Study on pyrolysis characteristics of cellulose-enhanced epoxy resin composites

天然纤维在许多领域可取代合成纤维应用于增强式复合材料中,在保证了一定强度与刚度的同时具有成本低、质量轻、降解易等优点,但目前对于天然复合材料热解回收方面的研究匮乏。鉴于此,本文通过热重分析仪(TG)和热裂解气相色谱质谱联用仪(Py-GC/MS)研究天然纤维素增强式环氧树脂复合材料热解反应动力学和产物生产特性。结果表明,在复合材料中,纤维素和环氧树脂的协同效应降低了复合材料的热稳定性,同时极大程度地降低了焦的残余量,最终显著降低了复合材料的热解活化能;另一方面,协同效应对快速热解产物的种类影响不明显,但能够显著影响产物产量和分布。

Natural fibers can replace synthetic fibers in many fields,particularly in reinforced composite materials.They ensure a certain strength and stiffness while having the advantages of low cost,light mass,and easy degradation.However,there is currently a lack of research on pyrolysis recycling of natural composite materials.To address this gap,this study investigates the thermal decomposition kinetics and product characteristics of natural fiber-reinforced epoxy resin composites using thermal gravimetric analyzer(TGA)and pyrolysis gas chromatography-mass spectrometry(Py-GC/MS)experimental methods.The results indicate that the synergistic effect of cellulose and epoxy resin in the composite reduces its thermal stability and significantly decreases the residual char content,ultimately leading to a substantial reduction in the activation energy for the composite.On the other hand,the synergistic effect has a less noticeable impact on the types of products during rapid pyrolysis but significantly influences the yield and distribution of products.