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Received March 22, 2020
Accepted June 30, 2020
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Fracture toughness enhancement of epoxy resin reinforced with graphene nanoplatelets and carbon nanotubes

Department of Polymer Materials, Jilin Institute of Chemical Technology, Jilin City 132022, P. R. China 1Changchun Hyperions Scientific Co., Ltd., Changchun City 130000, P. R. China 2Department of Chemistry, Inha University, Nam-gu, Incheon 22212, Korea
jinfanlong@163.com
Korean Journal of Chemical Engineering, November 2020, 37(11), 2075-2083(9), 10.1007/s11814-020-0620-4
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Abstract

Graphene nanoplatelets (GNPs)/silane-coupling-agent-treated GNPs (KH- GNPs) and hydroxyl multi-walled carbon nanotubes (MWCNTs-OH) were added as reinforcing agents to an epoxy matrix, diglycidylether of bisphenol-A (DGEBA), to improve the fracture toughness of DGEBA. The influence of the MWCNT-OH fraction on the thermal and flexural properties, fracture toughness, and morphology of the DGEBA/GNP/MWCNT-OH and DGEBA/ KH-GNP/MWCNT-OH nanocomposites was investigated. The results indicate that the fracture toughness of the DGEBA/KH-GNP/MWCNT-OH nanocomposites increased from 1.09 to 1.46MPa·m1/2, which is 33.9% greater than that of pristine DGEBA. Analysis of the fracture surfaces of the nanocomposites showed a rough morphology with numerous tortuous and river-like structures. In addition, the MWCNTs-OH were slightly pulled out or broken in the epoxy matrix during the fracture toughness tests.

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