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Materials 2017, 10(10), 1179; doi:10.3390/ma10101179

Enhancement of Fracture Toughness of Epoxy Nanocomposites by Combining Nanotubes and Nanosheets as Fillers

1
School of Engineering, Kingston University, London, SW15 3DW, UK
2
National Physical Laboratory, Hampton Road, Teddington, Middlesex, UK
*
Authors to whom correspondence should be addressed.
Received: 31 August 2017 / Revised: 29 September 2017 / Accepted: 12 October 2017 / Published: 19 October 2017
(This article belongs to the Special Issue Improving Performance of Nanocomposite Materials)
View Full-Text   |   Download PDF [6248 KB, uploaded 19 October 2017]   |  

Abstract

In this work the fracture toughness of epoxy resin has been improved through the addition of low loading of single part and hybrid nanofiller materials. Functionalised multi-walled carbon nanotubes (f-MWCNTs) was used as single filler, increased the critical strain energy release rate, GIC, by 57% compared to the neat epoxy, at only 0.1 wt% filler content. Importantly, no degradation in the tensile or thermal properties of the nanocomposite was observed compared to the neat epoxy. When two-dimensional boron nitride nanosheets (BNNS) were added along with the one-dimensional f-MWCNTs, the fracture toughness increased further to 71.6% higher than that of the neat epoxy. Interestingly, when functionalised graphene nanoplatelets (f-GNPs) and boron nitride nanotubes (BNNTs) were used as hybrid filler, the fracture toughness of neat epoxy is improved by 91.9%. In neither of these hybrid filler systems the tensile properties were degraded, but the thermal properties of the nanocomposites containing boron nitride materials deteriorated slightly. View Full-Text
Keywords: epoxy; carbon nanotube; boron nitride nanotube; graphene; boron nitride nanosheet; hybrid nanocomposite; fracture toughness epoxy; carbon nanotube; boron nitride nanotube; graphene; boron nitride nanosheet; hybrid nanocomposite; fracture toughness
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Domun, N.; Paton, K.R.; Hadavinia, H.; Sainsbury, T.; Zhang, T.; Mohamud, H. Enhancement of Fracture Toughness of Epoxy Nanocomposites by Combining Nanotubes and Nanosheets as Fillers. Materials 2017, 10, 1179.

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