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Bioinspired Temperature-Responsive Multilayer Films and Their Performance under Thermal Fatigue

The structure of certain nonliving tissues determines their self-shaping and self-folding capabilities in response to a stimulus. Predetermined movements are realized according to changes in the environmental conditions due to the generated stresses of the multilayer anisotropic structure. In this s...

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Detalles Bibliográficos
Autores principales: Athanasopoulos, Nikolaos, Siakavellas, Nicolaos J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6352671/
https://www.ncbi.nlm.nih.gov/pubmed/31105242
http://dx.doi.org/10.3390/biomimetics3030020
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author Athanasopoulos, Nikolaos
Siakavellas, Nicolaos J.
author_facet Athanasopoulos, Nikolaos
Siakavellas, Nicolaos J.
author_sort Athanasopoulos, Nikolaos
collection PubMed
description The structure of certain nonliving tissues determines their self-shaping and self-folding capabilities in response to a stimulus. Predetermined movements are realized according to changes in the environmental conditions due to the generated stresses of the multilayer anisotropic structure. In this study, we present bioinspired responsive anisotropic multilayer films and their fabrication process which comprises low-cost techniques. The anisotropic multilayer materials are capable of deforming their geometry caused by small temperature changes (<40 °C). The mismatch in the thermo-mechanical properties between three or more anisotropic thin layers creates responsive materials that alter their shape owing to the developed internal stresses. The movements of the material can be controlled by forming anisotropic homogenous metallic strips over an anisotropic thermoplastic layer. As a result, responsive multilayer films made of common materials can be developed to passively react to a temperature stimulus. We demonstrate the ability of the anisotropic materials to transform their geometry and we present a promising fabrication process and the thermal fatigue resistance of the developed materials. The thermal fatigue performance is strongly related to the fabrication method and the thickness of the strips. We studied the thermal fatigue performance of the materials and how the thermal cycling affects their sensitivity, as well as their failure modes and crack formation.
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spelling pubmed-63526712019-05-16 Bioinspired Temperature-Responsive Multilayer Films and Their Performance under Thermal Fatigue Athanasopoulos, Nikolaos Siakavellas, Nicolaos J. Biomimetics (Basel) Article The structure of certain nonliving tissues determines their self-shaping and self-folding capabilities in response to a stimulus. Predetermined movements are realized according to changes in the environmental conditions due to the generated stresses of the multilayer anisotropic structure. In this study, we present bioinspired responsive anisotropic multilayer films and their fabrication process which comprises low-cost techniques. The anisotropic multilayer materials are capable of deforming their geometry caused by small temperature changes (<40 °C). The mismatch in the thermo-mechanical properties between three or more anisotropic thin layers creates responsive materials that alter their shape owing to the developed internal stresses. The movements of the material can be controlled by forming anisotropic homogenous metallic strips over an anisotropic thermoplastic layer. As a result, responsive multilayer films made of common materials can be developed to passively react to a temperature stimulus. We demonstrate the ability of the anisotropic materials to transform their geometry and we present a promising fabrication process and the thermal fatigue resistance of the developed materials. The thermal fatigue performance is strongly related to the fabrication method and the thickness of the strips. We studied the thermal fatigue performance of the materials and how the thermal cycling affects their sensitivity, as well as their failure modes and crack formation. MDPI 2018-08-01 /pmc/articles/PMC6352671/ /pubmed/31105242 http://dx.doi.org/10.3390/biomimetics3030020 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Athanasopoulos, Nikolaos
Siakavellas, Nicolaos J.
Bioinspired Temperature-Responsive Multilayer Films and Their Performance under Thermal Fatigue
title Bioinspired Temperature-Responsive Multilayer Films and Their Performance under Thermal Fatigue
title_full Bioinspired Temperature-Responsive Multilayer Films and Their Performance under Thermal Fatigue
title_fullStr Bioinspired Temperature-Responsive Multilayer Films and Their Performance under Thermal Fatigue
title_full_unstemmed Bioinspired Temperature-Responsive Multilayer Films and Their Performance under Thermal Fatigue
title_short Bioinspired Temperature-Responsive Multilayer Films and Their Performance under Thermal Fatigue
title_sort bioinspired temperature-responsive multilayer films and their performance under thermal fatigue
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6352671/
https://www.ncbi.nlm.nih.gov/pubmed/31105242
http://dx.doi.org/10.3390/biomimetics3030020
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