Mechanical and physical performance of carbon aerogel reinforced carbon fibre hierarchical composites

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Title: Mechanical and physical performance of carbon aerogel reinforced carbon fibre hierarchical composites
Authors: Nguyen, S
Anthony, DB
Qian, H
Yue, C
Singh, A
Bismarck, A
Shaffer, MSP
Greenhalgh, ES
Item Type: Journal Article
Abstract: Carbon aerogel (CAG) is a potential hierarchical reinforcement to improve the matrix-dominated mechanical properties of continuous carbon fibre reinforced polymer (CFRP) composites in both multifunctional and purely structural applications. When using CAG to reinforce a polyethylene glycol diglycidyl ether (PEGDGE) matrix, the interlaminar shear strength, compressive modulus and strength increased approximately four-fold, whilst the out-of-plane electrical conductivity increased by 118%. These mechanical and electrical performance enhancements significantly improve the multifunctional efficiency of composite structural supercapacitors, which can offer weight savings in transport and other applications. However, CAG also has the potential to reinforce conventional continuous CF composites in purely structural contexts. Here, CAG reinforcement of structural epoxy resin composites marginally increased compressive (1.4%) and tensile (2.7%) moduli respectively, but considerably reduced compressive, tensile and interlaminar shear strengths. Fractographic analysis shows that the reduced performance can be attributed to poor interfacial adhesion; in the future, alternative processing routes may resolve these issues to achieve advances in both moduli and strengths over conventional structural CFRPs.
Issue Date: 29-Sep-2019
Date of Acceptance: 9-Jul-2019
ISSN: 0266-3538
Publisher: Elsevier
Journal / Book Title: Composites Science and Technology
Volume: 182
Copyright Statement: © 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence
Sponsor/Funder: QinetiQ Limited
Commission of the European Communities
Ministry Of Defence
Clean Sky Joint Undertaking
Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: AT/FRN/12750/IMP
FP7 - 234236
Keywords: Materials
09 Engineering
Publication Status: Published
Embargo Date: 2020-07-10
Article Number: 107720
Online Publication Date: 2019-07-10
Appears in Collections:Chemistry
Faculty of Natural Sciences

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