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

详细信息    查看全文

• 作者：Yunyu Li¹ ; Ling-jun Guo¹ ; Ya-wen Wang¹ ; He-jun Li¹ ; Qiang Song¹ ; ² ; ^{plusring@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Multiscale reinforcement ; Carbon fiber ; Graphene oxide ; Carbon nanotube ; Carbon/carbon composite ; Tensile property
• 刊名：Journal of Materials Science & Technology
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：32
• 期：5
• 页码：419-424
• 全文大小：2980 K

文摘

In-situ growing carbon nanotubes (CNTs) directly on carbon fibers (CFs) always lead to a degraded tensile strength of CFs and then a poor fiber-dominated mechanical property of carbon/carbon composites (C/Cs). To solve this issue, here, a novel carbon fiber-based multiscale reinforcement is reported. To synthesize it, carbon fibers (CFs) have been first 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.