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采用原位杂化方法分别制备了SiC、SiO2和Al2O3 3种纳米粒子杂化酚醛树脂,扫描电镜观察发现,纳米粒子均匀分散在酚醛树脂中,与酚醛树脂形成“海-岛”结构;热重分析结果显示,纳米粒子杂化酚醛树脂的降解过程分为3个阶段,通过Kissinger法对杂化酚醛树脂热分解活化能进行计算,发现纳米粒子能够降低树脂第1阶段的热分解活化能,而提高了树脂在第2阶段的热分解活化能;磨耗性能测试显示纳米粒子可提高酚醛树脂/炭纤维耐磨性能;氧-乙炔烧蚀法测试表明,纳米粒子能提高酚醛树脂/炭纤维复合材料的耐烧蚀性能。
The in-situ hybridization methods were used to fabricate three types of hybrid phenolic resins, SiC, SiO2 and Al2O3 respectively. Scanning electron microscopy showed that the nanoparticles were uniformly dispersed in the phenolic resin and formed “sea-island” structure with the phenolic resin. Thermogravimetric analysis showed that the degradation process of nano-particle hybrid phenolic resin was divided into three stages. The Kissinger method was used to calculate the thermal decomposition activation energy of the hybrid phenolic resin. It was found that the nano-particles can reduce the thermal decomposition activation energy of the first phase of the resin , And enhanced the thermal decomposition activation energy of the resin in the second stage. The abrasion performance test shows that the nano-particles can improve the wear resistance of the phenolic resin / carbon fiber. The oxygen-acetylene ablation test shows that the nano-particles can improve the phenolic resin / carbon fiber Ablation resistance of composite materials.