Lee Suhyun, Ko Kwangduk, Youk Jiho, Lim Daeyoung, Jeong Wonyoung
Human Convergence Technology Group, Korea Institute of Industrial Technology, Ansan 15588, Korea.
Department of Chemical Engineering, Inha University, Incheon 22212, Korea.
Polymers (Basel). 2019 Sep 30;11(10):1597. doi: 10.3390/polym11101597.
In this study, carbon nanotubes (CNTs) were introduced into carbon fiber (CF) wet-laid composites as functional nano-fillers to fabricate multi-functional composites with improved mechanical, electrical, and thermal properties. It was considered that the wet-laid process was most suitable in order to introduce filler into brittle and rigid carbon fiber substrates, and we established the conditions of the process that could impart dispersibility and bonding between the fibers. We introduced polyamide 6 (PA6) short fiber, which is the same polymeric material as the stacking film, into carbon fiber and CNT mixture to enhance the binding interactions between carbon fiber and CNTs. Various types of CNT-reinforced carbon fiber wet-laid composites with PA6 short fibers were prepared, and the morphology, mechanical and electrical properties of the composites were estimated. As CNT was added to the carbon fiber nonwoven, the electrical conductivity increased by 500% but the tensile strength decreased slightly. By introducing short fibers of the same material as the matrix between CNT-CF wet-laid nonwovens, it was possible to find optimum conditions to increase the electrical conductivity while maintaining mechanical properties.
在本研究中，将碳纳米管（CNTs）作为功能性纳米填料引入到碳纤维（CF）湿法铺层复合材料中，以制备具有改善的机械、电学和热学性能的多功能复合材料。人们认为湿法铺层工艺最适合将填料引入脆性和刚性的碳纤维基材中，并且我们确定了该工艺的条件，这些条件能够赋予纤维之间的分散性和粘结性。我们将与堆叠膜相同聚合物材料的聚酰胺6（PA6）短纤维引入碳纤维和碳纳米管的混合物中，以增强碳纤维与碳纳米管之间的结合相互作用。制备了各种含有PA6短纤维的碳纳米管增强碳纤维湿法铺层复合材料，并对复合材料的形态、机械和电学性能进行了评估。当碳纳米管添加到碳纤维非织造布中时，电导率提高了500%，但拉伸强度略有下降。通过在碳纳米管-碳纤维湿法铺层非织造布之间引入与基体相同材料的短纤维，可以找到在保持机械性能的同时提高电导率的最佳条件。
