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Article

Mechanical Properties Assessment of Low-Content Capsule-Based Self-Healing Structural Composites

1
Department of Mechanical Engineering & Aeronautics, University of Patras, Patras University Campus, GR 26500 Patras, Greece
2
Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(17), 5739; https://doi.org/10.3390/app10175739
Received: 31 July 2020 / Revised: 13 August 2020 / Accepted: 17 August 2020 / Published: 19 August 2020
(This article belongs to the Special Issue Multifunctional Composite Materials)
Microcapsule-based carbon fiber reinforced composites were manufactured by wet layup, in order to assess their mechanical properties and determine their healing efficiency. Microcapsules at 10%wt. containing bisphenol-A epoxy, encapsulated in a urea formaldehyde (UF) shell, were employed with Scandium (III) Triflate (Sc (OTf)3) as the catalyst. The investigation was deployed with two main directions. The first monitored changes to the mechanical performance due to the presence of the healing agent within the composite. More precisely, a minor decrease in interlaminar fracture toughness (GIIC) (−14%), flexural strength (−12%) and modulus (−4%) compared to the reference material was reported. The second direction evaluated the healing efficiency. The experimental results showed significant recovery in fracture toughness up to 84% after the healing process, while flexural strength and modulus healing rates reached up to 14% and 23%, respectively. The Acoustic Emission technique was used to support the experimental results by the onsite monitoring. View Full-Text
Keywords: self-healing; capsule based composites; mechanical properties self-healing; capsule based composites; mechanical properties
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MDPI and ACS Style

Tsilimigkra, X.; Bekas, D.; Kosarli, M.; Tsantzalis, S.; Paipetis, A.; Kostopoulos, V. Mechanical Properties Assessment of Low-Content Capsule-Based Self-Healing Structural Composites. Appl. Sci. 2020, 10, 5739. https://doi.org/10.3390/app10175739

AMA Style

Tsilimigkra X, Bekas D, Kosarli M, Tsantzalis S, Paipetis A, Kostopoulos V. Mechanical Properties Assessment of Low-Content Capsule-Based Self-Healing Structural Composites. Applied Sciences. 2020; 10(17):5739. https://doi.org/10.3390/app10175739

Chicago/Turabian Style

Tsilimigkra, Xenia, Dimitrios Bekas, Maria Kosarli, Stavros Tsantzalis, Alkiviadis Paipetis, and Vassilis Kostopoulos. 2020. "Mechanical Properties Assessment of Low-Content Capsule-Based Self-Healing Structural Composites" Applied Sciences 10, no. 17: 5739. https://doi.org/10.3390/app10175739

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