不锈钢纤维碳纳米管填充尼龙基复合材料的力学性能研究.PDF

The 7th National Conference on Functional Materials and Applications Mechanical Properties of Stainless Steel Fiber/Carbon Nanotube Filled Nylon Conductive Composites Man Li, Shu-lin Bai, Yang-fei Zhang, Zhi-yong Jia LTCS, Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing, China Email :slbai@pku.edu.cn,zhangyangfei@pku.edu.cn Abstract: The stainless steel / Nylon6 (SSF/PA6) and stainless steel / carbon nanaotube / Nylon6 (SSF/CNT/PA6) composites were prepared by the pre-prepared master batch method. The mechanical proper- ties were studied by tensile test and izod pendulum impact resistance tests with various contents of SSF and CNT, including elastic modulus, yield strength, tensile strength and impact strength. The microstructure and internal mechanism of the composites were observed and analyzed by scanning electron microscopy (SEM). The result shows that CNT and SSF both increase the elastic modulus, which descends when CNT and SSF mix together. The CNT and SSF play a negative role of the yield strength and tensile strength. The increase content of SSF enhances the impact strength of the composites materials. Keywords: nylon6; stainless steel fiber; carbon nanotube; mechanical properties 不锈钢纤维/碳纳米管填充尼龙基复合材料 的力学性能研究 李 曼，白树林，张杨飞，贾治勇 北京大学工学院先进材料与纳米技术系，北京，中国 100871 Email:slbai@pku.edu.cn,zhangyangfei@pku.edu.cn 摘 要：采用预制母料法制备了不锈钢纤维/尼龙 6 和不锈钢纤维/碳纳米管/尼龙 6 导电高分子纳米复 合材料。通过拉伸试验和悬臂梁断口冲击试验研究了不锈钢纤维和碳纳米管的含量对复合材料的弹性 模量、屈服强度、拉伸强度和冲击韧性等力学性能的影响，并利用材料断口的扫描电镜观察，分析并 讨论了复合材料的微观结构和破坏机理。结果表明：单独添加碳纳米管和不锈钢纤维都会提高复合材 料的弹性模量，但是对复合材料的弯曲强度和拉伸强度都起到了负面作用，此外不锈钢纤维含量的增