A Novel Multiscale Reinforcement by In-Situ Growing Carbon Nanotubes on Graphene Oxide Grafted Carbon Fibers and Its Reinforced Carbon/Carbon Composites with Improved Tensile Properties
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2016年第5期
论文作者：Yunyu Li Ling-jun Guo Ya-wen Wang He-jun Li Qiang Song
文章页码：419 - 424
摘 要：In-situ growing carbon nanotubes（CNTs）directly on carbon?bers（CFs）always lead to a degraded tensile strength of CFs and then a poor?ber-dominated mechanical property of carbon/carbon composites（C/Cs）.To solve this issue,here,a novel carbon?ber-based multiscale reinforcement is reported.To synthesize it,carbon?bers（CFs）have been?rst grafted by graphene oxide（GO）,and then carbon nanotubes（CNTs）have been in-situ grown on GO-grafted CFs by catalytic chemical vapor deposition.Characterizations on this novel reinforcement show that GO grafting cannot only nondestructively improve the surface chemical activity of CFs but also protect CFs against the high-temperature corrosion of metal catalyst during CNT growth,which maintains their tensile properties.Tensile property tests for unidirectional C/Cs with different preforms show that this novel reinforcement can endow C/C with improved tensile properties,32% and 87%higher than that of pure C/C and C/C only doped with in-situ grown CNTs.This work would open up a possibility to fabricate multiscale C/Cs with excellent global performance.
Yunyu Li1，Ling-jun Guo1，Ya-wen Wang1，He-jun Li1，Qiang Song1,2
1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University2. Center for Nano Energy Materials, Northwestern Polytechnical University
摘 要：In-situ growing carbon nanotubes（CNTs）directly on carbon?bers（CFs）always lead to a degraded tensile strength of CFs and then a poor?ber-dominated mechanical property of carbon/carbon composites（C/Cs）.To solve this issue,here,a novel carbon?ber-based multiscale reinforcement is reported.To synthesize it,carbon?bers（CFs）have been?rst grafted by graphene oxide（GO）,and then carbon nanotubes（CNTs）have been in-situ grown on GO-grafted CFs by catalytic chemical vapor deposition.Characterizations on this novel reinforcement show that GO grafting cannot only nondestructively improve the surface chemical activity of CFs but also protect CFs against the high-temperature corrosion of metal catalyst during CNT growth,which maintains their tensile properties.Tensile property tests for unidirectional C/Cs with different preforms show that this novel reinforcement can endow C/C with improved tensile properties,32% and 87%higher than that of pure C/C and C/C only doped with in-situ grown CNTs.This work would open up a possibility to fabricate multiscale C/Cs with excellent global performance.
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