【作者】 刘建秀； 宁向可； 刘永军；

【Author】 LIU Jian-xiu NING xiang-ke LIU Yong-jun (Zhengzhou University of Light Industry,Henan ZhengZhou 450002,China)

【机构】 郑州轻工业学院；

【摘要】 利用Nano-SiO₂和Nano-Al₂O₃制备了改性后的环氧树脂复合材料,并对其在低温条件下的力学性能进行了研究。在环氧树脂中加入纳米材料,并采用对纳米颗粒表面进行硅烷偶联处理的方法实现了纳米粒子在树脂基体中的均匀分散,通过制作模具,得到了一定规格的力学试样。在液氮下对部分复合材料进行冷冻,然后通过电子万能实验机和冲击实验机测试其低温力学性能,并与未冷冻复合材料的室温力学性能进行比较。结果表明,复合材料低温下的拉伸强度比室温下的高,但冲击强度和断裂伸长率有所下降。更多还原

【Abstract】 Prepared epoxy resin compound materials modified by nano-SiO₂ and nano-Al₂O₃.Tested the two materials’ mechanical properties under low temperature condition.Added nano-materials to the epoxy resin. Used the silane coupling agent processing to realize the nano-granules dispersed evenly in epoxy resin. Manufactured the mold and obtained the mechanical test specimens with certain specification.Carried on liquid nitrogen freezing to mechanical test specimens,then tested their low temperature mechanical properties on the electronic universal testing machine and the impact testing machine.Comparing the frozen specimens’ mechanical properties to the specimens without frozen,the result indicated that the compound materials’ tensile strength under low temperature were higher,but the impact strength and the breaking elongation dropped.更多还原