Investigation on the interfacial properties of CNTs sized carbon fibres in epoxy resin using push-out method via nano-indentation technique

Zhenxue Zhang, Xiaoying Li, Hanshan Dong, Simon Jestin, Stefania Termine, Aikaterini-flora Trompeta, Andreia Araújo , Raquel M. Santos, Costas A. Charitidis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work, the carbon fibres (CFs) surfaces were modified via sizing and coated with a very thin layer of a complex formulation including carbon nanotubes (CNTs). A push-out method was developed based on nanoindentation to assess the interfacial shear strength of the fibre/matrix. The mechanical properties such as indentation hardness, reduced modulus, indentation displacement and indentation creep of the composite were evaluated by means of the Oliver-Pharr method. The critical load of different composites was measured and the interfacial shear strength (IFSS) was calculated to compare the effect of the CNTs concentration in the sizing solution. Wettability evaluation of the sized fibres was performed prior to nanoindentation to investigate the adhesion of the resin. After push-out testing, characterisation by optical microscopy/SEM was carried out to ratify the results. It was found sizing with a small amount of evenly distributed nano-inclusion on CFs can increase the interfacial shear strength but large amount of sizing could lead to a decrease of the interfacial bonding due to the agglomeration of CNTs on CFs.

Original languageEnglish
Title of host publication6th International Conference of Engineering Against Failure (ICEAF-VI 2021)
PublisherEDP Sciences
DOIs
Publication statusPublished - 15 Nov 2021
Event6th International Conference of Engineering Against Failure (ICEAF-VI 2021) - Spetses island, Greece
Duration: 23 Jun 202125 Jun 2021
Conference number: 6th
https://www.fems.org/event/iceaf-vi-6th-international-conference-engineering-against-failure

Publication series

NameMATEC Web of Conferences
Volume349
ISSN (Electronic)2261-236X

Conference

Conference6th International Conference of Engineering Against Failure (ICEAF-VI 2021)
Abbreviated titleICEAF-VI 2021
Country/TerritoryGreece
Period23/06/2125/06/21
Internet address

Keywords

  • push-out y
  • CNT
  • carbon fibre reinforced composite
  • nano-indentation
  • wettability

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