Interfacial Microstructure and Enhanced Mechanical Properties of Carbon Fiber Composites Caused by Growing Generation 1–4 Dendritic Poly(amidoamine) on a Fiber Surface

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• 作者：Bo Gao ; Ruliang Zhang ; Fucheng Gao ; Maoshuai He ; Chengguo Wang ; Lei Liu ; Lifen Zhao ; Hongzhi Cui
• 刊名：Langmuir
• 出版年：2016
• 出版时间：August 23, 2016
• 年：2016
• 卷：32
• 期：33
• 页码：8339-8349
• 全文大小：875K
• 年卷期：0
• ISSN：1520-5827

文摘

In an attempt to improve the mechanical properties of carbon fiber composites, propagation of poly(amidoamine) (PAMAM) dendrimers by in situ polymerization on a carbon fiber surface was performed. During polymerization processes, PAMAM was grafted on carbon fiber by repeated Michael addition and amidation reactions. The changes in surface microstructure and the chemical composition of carbon fibers before and after modification were investigated by atomic force microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. All the results indicated that PAMAM was successfully grown on the carbon fiber surface. Such propagation could significantly increase the surface roughness and introduce sufficient polar groups onto the carbon fiber surface, enhancing the surface wettability of carbon fiber. The fractured surface of carbon fiber-reinforced composites showed a great enhancement of interfacial adhesion. Compared with those of desized fiber composites, the interlaminar shear strength and interfacial shear strength of PAMAM/fiber-reinforced composites showed increases of 55.49 and 110.94%, respectively.