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A Light-Powered Liquid Crystal Elastomer Spring Oscillator with Self-Shading Coatings

The self-oscillating systems based on stimuli-responsive materials, without complex controllers and additional batteries, have great application prospects in the fields of intelligent machines, soft robotics, and light-powered motors. Recently, the periodic oscillation of an LCE fiber with a mass bl...

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Detalles Bibliográficos
Autores principales: Du, Changshen, Cheng, Quanbao, Li, Kai, Yu, Yong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9028186/
https://www.ncbi.nlm.nih.gov/pubmed/35458275
http://dx.doi.org/10.3390/polym14081525
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author Du, Changshen
Cheng, Quanbao
Li, Kai
Yu, Yong
author_facet Du, Changshen
Cheng, Quanbao
Li, Kai
Yu, Yong
author_sort Du, Changshen
collection PubMed
description The self-oscillating systems based on stimuli-responsive materials, without complex controllers and additional batteries, have great application prospects in the fields of intelligent machines, soft robotics, and light-powered motors. Recently, the periodic oscillation of an LCE fiber with a mass block under periodic illumination was reported. This system requires periodic illumination, which limits the application of self-sustained systems. In this paper, we creatively proposed a light-powered liquid crystal elastomer (LCE) spring oscillator with self-shading coatings, which can self-oscillate continuously under steady illumination. On the basis of the well-established dynamic LCE model, the governing equation of the LCE spring oscillator is formulated, and the self-excited oscillation is studied theoretically. The numerical calculations show that the LCE spring oscillator has two motion modes, static mode and oscillation mode, and the self-oscillation arises from the coupling between the light-driven deformation and its movement. Furthermore, the contraction coefficient, damping coefficient, painting stretch, light intensity, spring constant, and gravitational acceleration all affect the self-excited oscillation of the spring oscillator, and each parameter is a critical value for triggering self-excited oscillation. This work will provide effective help in designing new optically responsive structures for engineering applications.
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spelling pubmed-90281862022-04-23 A Light-Powered Liquid Crystal Elastomer Spring Oscillator with Self-Shading Coatings Du, Changshen Cheng, Quanbao Li, Kai Yu, Yong Polymers (Basel) Article The self-oscillating systems based on stimuli-responsive materials, without complex controllers and additional batteries, have great application prospects in the fields of intelligent machines, soft robotics, and light-powered motors. Recently, the periodic oscillation of an LCE fiber with a mass block under periodic illumination was reported. This system requires periodic illumination, which limits the application of self-sustained systems. In this paper, we creatively proposed a light-powered liquid crystal elastomer (LCE) spring oscillator with self-shading coatings, which can self-oscillate continuously under steady illumination. On the basis of the well-established dynamic LCE model, the governing equation of the LCE spring oscillator is formulated, and the self-excited oscillation is studied theoretically. The numerical calculations show that the LCE spring oscillator has two motion modes, static mode and oscillation mode, and the self-oscillation arises from the coupling between the light-driven deformation and its movement. Furthermore, the contraction coefficient, damping coefficient, painting stretch, light intensity, spring constant, and gravitational acceleration all affect the self-excited oscillation of the spring oscillator, and each parameter is a critical value for triggering self-excited oscillation. This work will provide effective help in designing new optically responsive structures for engineering applications. MDPI 2022-04-09 /pmc/articles/PMC9028186/ /pubmed/35458275 http://dx.doi.org/10.3390/polym14081525 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
Du, Changshen
Cheng, Quanbao
Li, Kai
Yu, Yong
A Light-Powered Liquid Crystal Elastomer Spring Oscillator with Self-Shading Coatings
title A Light-Powered Liquid Crystal Elastomer Spring Oscillator with Self-Shading Coatings
title_full A Light-Powered Liquid Crystal Elastomer Spring Oscillator with Self-Shading Coatings
title_fullStr A Light-Powered Liquid Crystal Elastomer Spring Oscillator with Self-Shading Coatings
title_full_unstemmed A Light-Powered Liquid Crystal Elastomer Spring Oscillator with Self-Shading Coatings
title_short A Light-Powered Liquid Crystal Elastomer Spring Oscillator with Self-Shading Coatings
title_sort light-powered liquid crystal elastomer spring oscillator with self-shading coatings
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9028186/
https://www.ncbi.nlm.nih.gov/pubmed/35458275
http://dx.doi.org/10.3390/polym14081525
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