Preparation and characterization of carbon nanotube-hybridized carbon fiber to reinforce epoxy composite
Preparation and characterization of carbon nanotube-hybridized carbon fiber to reinforce epoxy composite
复制标题
DOI：
10.1016/j.matdes.2011.07.027
复制
发表时间：
2012-01-01
影响因子：
8.4
通讯作者：
Yang, Yu
中科院分区：
文献类型：
--
作者：
An, Feng;Lu, Chunxiang;Yang, Yu
采用新型气溶胶辅助化学气相沉积法制备了多尺度碳纳米管杂化碳纤维。用扫描电子显微镜和透射电子显微镜对这种多尺度材料进行了表征。与原始碳纤维相比，该混杂纤维的BET比表面积增加了近3倍，达到2.22m(2)/g，同时，纤维的拉伸强度在10%以内略有下降，而纤维的弹性系数没有明显的变化。通过微滴复合材料的单纤维拔出实验，测定了碳纳米管杂化碳纤维与环氧基复合材料的界面剪切强度。由于碳纳米管杂化碳纤维有效地增加了纤维/基体界面的载荷传递，复合材料的界面剪切强度比碳纤维增强的复合材料提高了近94%。根据复合材料的断口形貌，提出了不同类型的碳纳米管断裂方式和纤维拔出方式，探讨了复合材料的界面增强机理。(C)2011爱思唯尔有限公司。保留所有权利。
The multiscale carbon nanotube-hybridized carbon fiber was prepared by a newly developed aerosol-assisted chemical vapour deposition. Scanning electron microscopy and transmission electron microscope were carried out to characterize this multiscale material. Compared with the original carbon fibers, the fabrication of this hybrid fiber resulted in an almost threefold increase of BET surface area to reach 2.22 m(2)/g. Meanwhile, there was a slight degradation of fiber tensile strength within 10%, while the fiber modulus was not significantly affected. The interfacial shearing strength of a carbon fiber-reinforced polymer composite with carbon nanotube-hybridized carbon fiber and an epoxy matrix was determined from the single fiber pull-out tests of microdroplet composite. Due to an efficient increase of load transfer at the fiber/matrix interfaces, the interracial shear strength of composite reinforced by carbon nanotube-hybridized carbon fiber is almost 94% higher than that of one reinforced by the original carbon fiber. Based on the fractured morphologies of the composites, the interfacial reinforcing mechanisms were discussed through proposing different types of carbon nanotube fracture modes along with fiber pulling out from epoxy composites. (C) 2011 Elsevier Ltd. All rights reserved.