Influence of carbon nanofiber on temperature resistance
effect of carbon fiber reinforced polymer
1. Faculty of Civil Engineering and Mechanics， Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. College of Urban Construction and Design, Taizhou Institute of Science and Technology, Nanjing University of Science and Technology, Taizhou, Jiangsu 225300, China； 3. Sanming Puyan Expressway Co., Ltd., Sanming, Fujian 350000, China
Abstract：To explore the effect of carbon nanofiber (CNF) doping amount on the temperature resistance effect of carbon fiber reinforced polymer(CFRP), the CNF conductive particles were uniformly dispersed in the epoxy resin matrix, and the CFRP components with different doping amounts were fabricated by the brush molding process. A cyclic temperature test was conducted, and the resistances of the CFRP component were recorded. The results show that all components have positive temperature coefficient (PTC) effect and have excellent linear relationship between temperature and resistivity during the heating process. When the amount of CNF is 0.5%, it is close to the percolation threshold of material, and the temperature sensitivity of component is the strongest.Under the cyclic temperature loading, the temperature curves change in the same trend, but it presents significant "hysteresis loop" phenomenon.As the number of cycles of temperature loading is increased, the temperature sensitivity of the component is decreased, while the repeatability becomes better.
