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Modeling Self-Rollable Elastomeric Films for Building Bioinspired Hierarchical 3D Structures

In this work, an innovative model is proposed as a design tool to predict both the inner and outer radii in rolled structures based on polydimethylsiloxane bilayers. The model represents an improvement of Timoshenko’s formula taking into account the friction arising from contacts between layers aris...

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Autores principales: Vannozzi, Lorenzo, Lucantonio, Alessandro, Castillo, Arturo, De Simone, Antonio, Ricotti, Leonardo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9369037/
https://www.ncbi.nlm.nih.gov/pubmed/35955601
http://dx.doi.org/10.3390/ijms23158467
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author Vannozzi, Lorenzo
Lucantonio, Alessandro
Castillo, Arturo
De Simone, Antonio
Ricotti, Leonardo
author_facet Vannozzi, Lorenzo
Lucantonio, Alessandro
Castillo, Arturo
De Simone, Antonio
Ricotti, Leonardo
author_sort Vannozzi, Lorenzo
collection PubMed
description In this work, an innovative model is proposed as a design tool to predict both the inner and outer radii in rolled structures based on polydimethylsiloxane bilayers. The model represents an improvement of Timoshenko’s formula taking into account the friction arising from contacts between layers arising from rolling by more than one turn, hence broadening its application field towards materials based on elastomeric bilayers capable of large deformations. The fabricated structures were also provided with surface topographical features that would make them potentially usable in different application scenarios, including cell/tissue engineering ones. The bilayer design parameters were varied, such as the initial strain (from 20 to 60%) and the bilayer thickness (from 373 to 93 µm). The model matched experimental data on the inner and outer radii nicely, especially when a high friction condition was implemented in the model, particularly reducing the error below 2% for the outer diameter while varying the strain. The model outperformed the current literature, where self-penetration is not excluded, and a single value of the radius of spontaneous rolling is used to describe multiple rolls. A complex 3D bioinspired hierarchical elastomeric microstructure made of seven spirals arranged like a hexagon inscribed in a circumference, similar to typical biological architectures (e.g., myofibrils within a sarcolemma), was also developed. In this case also, the model effectively predicted the spirals’ features (error smaller than 18%), opening interesting application scenarios in the modeling and fabrication of bioinspired materials.
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spelling pubmed-93690372022-08-12 Modeling Self-Rollable Elastomeric Films for Building Bioinspired Hierarchical 3D Structures Vannozzi, Lorenzo Lucantonio, Alessandro Castillo, Arturo De Simone, Antonio Ricotti, Leonardo Int J Mol Sci Article In this work, an innovative model is proposed as a design tool to predict both the inner and outer radii in rolled structures based on polydimethylsiloxane bilayers. The model represents an improvement of Timoshenko’s formula taking into account the friction arising from contacts between layers arising from rolling by more than one turn, hence broadening its application field towards materials based on elastomeric bilayers capable of large deformations. The fabricated structures were also provided with surface topographical features that would make them potentially usable in different application scenarios, including cell/tissue engineering ones. The bilayer design parameters were varied, such as the initial strain (from 20 to 60%) and the bilayer thickness (from 373 to 93 µm). The model matched experimental data on the inner and outer radii nicely, especially when a high friction condition was implemented in the model, particularly reducing the error below 2% for the outer diameter while varying the strain. The model outperformed the current literature, where self-penetration is not excluded, and a single value of the radius of spontaneous rolling is used to describe multiple rolls. A complex 3D bioinspired hierarchical elastomeric microstructure made of seven spirals arranged like a hexagon inscribed in a circumference, similar to typical biological architectures (e.g., myofibrils within a sarcolemma), was also developed. In this case also, the model effectively predicted the spirals’ features (error smaller than 18%), opening interesting application scenarios in the modeling and fabrication of bioinspired materials. MDPI 2022-07-30 /pmc/articles/PMC9369037/ /pubmed/35955601 http://dx.doi.org/10.3390/ijms23158467 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Vannozzi, Lorenzo
Lucantonio, Alessandro
Castillo, Arturo
De Simone, Antonio
Ricotti, Leonardo
Modeling Self-Rollable Elastomeric Films for Building Bioinspired Hierarchical 3D Structures
title Modeling Self-Rollable Elastomeric Films for Building Bioinspired Hierarchical 3D Structures
title_full Modeling Self-Rollable Elastomeric Films for Building Bioinspired Hierarchical 3D Structures
title_fullStr Modeling Self-Rollable Elastomeric Films for Building Bioinspired Hierarchical 3D Structures
title_full_unstemmed Modeling Self-Rollable Elastomeric Films for Building Bioinspired Hierarchical 3D Structures
title_short Modeling Self-Rollable Elastomeric Films for Building Bioinspired Hierarchical 3D Structures
title_sort modeling self-rollable elastomeric films for building bioinspired hierarchical 3d structures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9369037/
https://www.ncbi.nlm.nih.gov/pubmed/35955601
http://dx.doi.org/10.3390/ijms23158467
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