Hybrid multi-scale epoxy composite made of conventional carbon fiber fabrics with interlaminar regions containing electrospun carbon nanofiber mats |
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Authors: | Qi Chen Lifeng Zhang Arifur Rahman Zhengping Zhou Xiang-Fa Wu Hao Fong |
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Affiliation: | aDepartment of Chemistry, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA;bDepartment of Mechanical Engineering, North Dakota State University, Fargo, ND 58108, USA |
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Abstract: | Herein we report the development and evaluation of hybrid multi-scale epoxy composite made of conventional carbon fiber fabrics with interlaminar regions containing mats of electrospun carbon nanofibers (ECNs). The results indicated that (1) the interlaminar shear strength and flexural properties of hybrid multi-scale composite were substantially higher than those of control/comparison composite without ECNs; in particular, the interlaminar shear strength was higher by ∼86%; and (2) the electrical conductivities in both in-plane and out-of-plane directions were enhanced through incorporation of ECNs, while the enhancement of out-of-plane conductivity (∼150%) was much larger than that of in-plane conductivity (∼20%). To validate the data reduction procedure, a new shear stress formula was formulated for composite laminates, which took into account the effect of layup and inter-layers. The study suggested that ECNs could be utilized for the development of high-performance composites, particularly with the improved out-of-plan properties (e.g., interlaminar shear strength). |
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Keywords: | A Polymer-matrix composites (PMCs) A Fibers B Mechanical properties B Electrical properties |
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