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所属单位：化学与生命科学学院

发表刊物：Applied Surface Science

项目来源：省、市、自治区科技项目

摘要：To enhance the interfacial properties of carbon fibers (CFs) reinforced epoxy composites without sacrificing fiber strength. A facile and effective Layer-by-Layer (LbL) self assembly method was proposed to deposit graphene oxide/silica (GO/SiO2) multilayers films onto CFs surface. The negatively charged GO and positively charged SiO2 can be assembled on the surface of fiber based on electrostatic interactions. Surface microstructures of CFs were characterized systematically. Scanning electron microscopy (SEM) revealed the GO/SiO2 multilayers films compact and homogeneous coverage onto CFs surface. This coverage significantly increases the roughness and surface energy of the fibers, improving the wettability and mechanical interlocking between fibers and resin. The optimal interfacial shear strength (IFSS) of composites with 5 layers (CF-L5) was 84.40 MPa, which increased by 86.1% compared to that of Untreated-CF composites (45.36 MPa), and the interlaminar shear strength (ILSS) of CF-L5 composites (76.34 MPa) increased by 89.3% compared to that of Untreated-CF composites (40.33 MPa). In addition, the flexural strength of CF-L5 composites (765.57 MPa) was 30.4% higher than that of Untreated-CF composites (587.19 MPa). The fractured surface, energy dispersive spectroscopy (EDS) mapping and dynamic mechanical properties of CFs composites also show a great improvement in interfacial adhesion. Moreover, the tensile strength (TS) of single fiber increased from 3.52 GPa to 3.68 GPa after LbL assembly of GO/SiO2. Our work suggested that such LbL self assembly is a green and promising approach toward preparing high interfacial properties in CFs composites.

第一作者：敖玉辉

论文类型：期刊论文

卷号：470

页面范围：1

是否译文：否

发表时间：2019-03-15