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用不同催化剂催化聚芳基乙炔树脂石墨化,重点研究了Fe_2O_3含量和热处理温度对PAA石墨化的影响。通过XRD、Raman、SEM和HRTEM分析了PAA热处理温前后的结构和形貌变化。实验结果显示:Fe_2O_3在热处理过程中转换成铁单质,有效地促进了PAA树脂的石墨化;Fe_2O_3含量的增加和热处理温度的升高均可促使石墨结构形成,且石墨化度达到了92.3%。石墨化后产物主要由石墨碳、铁纳米粒子和非晶碳构成。石墨化的碳纳米带包裹纳米铁颗粒并向外伸展相互连接,形成碳纳米网络结构。
The graphitization of polyarylacetylene resin with different catalysts was studied. The effects of Fe 2 O 3 content and heat treatment temperature on the graphitization of PAA were studied. The structure and morphology of the PAA treated by heat treatment were analyzed by XRD, Raman, SEM and HRTEM. The experimental results show that Fe 2 O 3 can be converted into iron single substance during heat treatment, which can effectively promote the graphitization of PAA resin. The increase of Fe 2 O 3 content and the increase of heat treatment temperature can promote the formation of graphite structure and the graphitization degree reaches 92.3%. The graphitized product is mainly composed of graphitic carbon, iron nano-particles and amorphous carbon. Graphitized carbon nanoribbons enclose the nano-iron particles and extend outward to connect with each other to form a carbon nanometer network structure.