Effectively enhanced interlaminar shear strength of carbon fiber fabric/epoxy composites by oxidized short carbon fibers at an extremely low content

Carbon fiber reinforced epoxy composites have high specific strength and modulus but relatively low interlaminar shear strength (ILSS). Herein treated short carbon fibers (SCFs) with ethanol and concentrated nitric acid are added to epoxy matrix to improve the ILSS of carbon fabric (CF)/epoxy compos...

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Bibliographic Details
Published in:Composites science and technology 2019-10, Vol.183, p.107803, Article 107803
Main Authors: Nie, Hui-Jie, Shen, Xiao-Jun, Tang, Bo-Lin, Dang, Chen-Yang, Yang, Shu, Fu, Shao-Yun
Format: Article
Language:English
Subjects:
Acids
Carbon fiber
Carbon fiber reinforced plastics
Carbon fibers
Carbon-epoxy composites
Composite materials
Epoxy matrix composites
Epoxy resins
Ethanol
Fiber composites
Fiber reinforced polymers
Fillers
Interfacial shear strength
Mechanical properties
Nitric acid
Polymer-matrix composites (PMCs)
Shear strength
Surface treatment
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Summary:Carbon fiber reinforced epoxy composites have high specific strength and modulus but relatively low interlaminar shear strength (ILSS). Herein treated short carbon fibers (SCFs) with ethanol and concentrated nitric acid are added to epoxy matrix to improve the ILSS of carbon fabric (CF)/epoxy composite. The effects of SCF content and treatment (oxidization) time are systematically examined on the ILSS of the CF/EP composite. An effective enhancement of 13.5% in the ILSS of the CF/EP composite is achieved by oxidized-SCFs at an extremely low content of 0.07 wt% relative to the epoxy matrix. The main mechanisms for enhancing the ILSS of CF/EP composite are explored by the addition of oxidized-SCFs. This strategy is of great practical significance since SCFs are very cheap and also can be easily dispersed in epoxy resins compared with nano-fillers etc. previously used for this purpose.
ISSN:0266-3538
1879-1050
DOI:10.1016/j.compscitech.2019.107803