Multiscale graphene oxide-carbon fiber reinforcements for advanced polyurethane composites

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• 作者：Shuai Jiang^a ; ^b ; Qifeng Li^a ; ^{liqf@sxicc.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Junwei Wang^a ; Zhenglong He^a ; Yuhua Zhao^a ; Maoqing Kang^a
• 关键词：A. Carbon fibers ; A. Graphene ; A. Polymer-matrix composites (PMCs) ; B. Mechanical properties
• 刊名：Composites Part A: Applied Science and Manufacturing
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：87
• 期：Complete
• 页码：1-9
• 全文大小：4527 K

文摘

Multiscale graphene oxide/carbon fiber (GO/CF) reinforcements were developed for polyurethane (PU) elastomer composites. GO was first coated on CF surface by electrophoretic deposition (EPD), aiming to improve the CF/PU interfacial adhesion. The EPD process improved the mechanical anchoring and chemical interaction between CFs and PU through increased surface roughness and oxygen content of CFs, thereby improved the CF/PU interfacial shear strength. The fibers were then mechanically mixed with GO to achieve a multiscale reinforcement. The strengthening of the matrix, especially the local stiffening of fiber/matrix interphase, is beneficial for the interfacial mechanical anchoring. The multiscale reinforcement resulted in an improvement of 46.4% in the tensile strength of PU elastomer. Compared with untreated-CF/PU, individual process of EPD treatment and mechanical mixing of GO resulted in an improvement of 16.9% and 13.9% of the strength, respectively. The enhanced reinforcing performance of GO-deposited CFs was attributed to the improved fiber–matrix interfacial adhesion.