标题：Interfacially reinforced carbon fiber/epoxy composite laminates via in-situ synthesized graphitic carbon nitride (g-C3N4)
作者：Song, Bo; Wang, Tingting; Wang, Li; Liu, Hu; Mai, Xianmin; Wang, Xiaojing; Wang, Ning; Huang, Yudong; Ma, Yong; Lu, Yang; Wujcik, 更多 作者机构：[Song, Bo] Shandong Univ, Marine Coll, Weihai 264209, Shandong, Peoples R China.; [Song, Bo; Wang, Tingting; Wang, Li] Shandong Univ, Sch Mech Elect 更多
通讯作者：Song, B;Ma, Y;Guo, ZH;Mai, XM;Ma, Y
通讯作者地址：[Song, B]Shandong Univ, Marine Coll, Weihai 264209, Shandong, Peoples R China;[Ma, Y; Guo, ZH]Univ Tennessee, Dept Chem & Biomol Engn, Integrated Comp 更多
来源：COMPOSITES PART B-ENGINEERING
关键词：Carbon fibers; Polymer-matrix composites (PMCs); Fiber/matrix bond;; Interphase/interface; Laminate mechanics
摘要：Carbon fiber composite laminates were interfacially reinforced through in-situ synthesis of g-C3N4 on the carbon fibers. The introduced g-C3N4 greatly improved the roughness, functional groups and wettability on the carbon fiber surface and markedly enhanced the interfacial properties of composite laminates. The surface free energy of carbon fibers was increased by 67.81%. Interlaminar shear strength and interfacial shear strength of composite laminates were increased from 51.84 to 72.09 MPa and 44.62-73.41 MPa, respectively. The significantly enhanced interfacial properties enabled the mechanical performance of composite laminates to reach a superior state. Tensile strength and bending strength were increased by 19.54 and 10.51%, respectively. The total absorbed energy of impact experiment was also enhanced from 1.14 to 1.78 J. Meanwhile, dynamic mechanical properties and hydrothermal aging resistance were also ameliorated significantly. The improved interfacial properties and mechanical properties were ascribed to the increased mechanical interlocking, enhanced chemical bonding and ameliorated wettability created by g-C3N4.