期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 201, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2020.108489
关键词
Carbon fibers; Interface/interphase; Surface modification; pi bridging
资金
- Department of Science and Technology of Jilin Province [20190201301JC, 20190302054GX]
A novel method of pi bridging between graphene oxide and carbon fiber was presented without the need for chemical treatment, resulting in improved performance of composites without damaging the carbon fiber. The introduced bridging agent significantly increased interlaminar shear strength, transverse fiber bundle strength, and interfacial shear strength of the composites.
Based on the inherent crystallite structure of carbon fiber, a novel and facile method was presented to balance the tedious steps and effectiveness of graphene oxide/carbon fiber (GO/CF) hierarchical reinforcement, by establishing pi bridging of GO and CF under the assistance of pyrene-containing compounds, which was performed without chemical treatment of CF and GO. The surface chemical elements, functional groups, wettability, morphologies and surface structures of obtained reinforcements were characterized through XPS, FT-IR, dynamic contact angle, SEM and Raman spectroscopy, respectively. This method could implement at room temperature without causing damage to CF as indicated by filament tensile strength test. The resulted composites with a bridging agent of 72 mmol/L have the highest interlaminar shear strength, transverse fiber bundle strength and interfacial shear strength which increased by 49.3%, 117.1% and 59.1%, respectively, compared to pristine CF composites.
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