标题：Enhanced mechanical properties of carbon fiber composites by grafting different structural poly(amido amine) onto fiber surface
作者：Gao, Bo; Zhang, Ruliang; Wang, Chengguo
作者机构：[Gao, Bo; Zhang, Ruliang] Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266590, Peoples R China.; [Zhang, Ruliang; Wang, Chengguo] Shando 更多
通讯作者地址：[Zhang, RL]Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266590, Peoples R China;[Wang, CG]Shandong Univ, Sch Mat Sci & Engn, Carbon Fiber 更多
关键词：Carbon fiber; Mechanical properties; Interfaces/Interphase; Surface; modification
摘要：The mechanical properties of carbon fiber composites depend on the interfacial strength between fiber and epoxy matrix. Different poly (amido amine) (PAMAM) dendrimers were grafted onto carbon fiber to improve the interfacial strength of the resulting composites. Functional groups on the carbon fiber surface were examined by X-ray photoelectron spectroscopy. The surface morphology of the resulting materials was characterized by scanning electron microscopy and atomic force microscope. The characterization results revealed that PAMAM dendrimers were chemically grafted onto the surface of carbon fiber. More importantly, the mechanical properties of the resulting composites were enhanced owing to the presence of sufficient functional groups on the carbon fiber surface. In addition, after PAMAM containing chair conformations were grafted, the interlaminar shear strength had the highest increase of 53.13%, higher than that of the fiber grafted with PAMAM containing terminated linear amine. This work provides an alternative approach to enhance the mechanical properties of fiber composites by controlling the interface between fiber and epoxy matrix. (C) 2016 Elsevier Ltd. All rights reserved.