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Probing the in-plane liquid-like behavior of liquid crystal elastomers

Tokumoto, Haruki and Zhou, Hao and Takebe, Asaka and Kamitani, Kazutaka and Kojio, Ken and Takahara, Atsushi and Bhattacharya, Kaushik and Urayama, Kenji (2021) Probing the in-plane liquid-like behavior of liquid crystal elastomers. Science Advances, 7 (25). Art. No. eabe9495. ISSN 2375-2548. PMCID PMC8213220. doi:10.1126/sciadv.abe9495. https://resolver.caltech.edu/CaltechAUTHORS:20210621-195349634

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Abstract

When isotropic solids are unequally stretched in two orthogonal directions, the true stress (force per actual cross-sectional area) in the larger strain direction is typically higher than that in the smaller one. We show that thiol-acrylate liquid crystal elastomers with polydomain texture exhibit an unusual tendency: The true stresses in the two directions are always identical and governed only by the area change in the loading plane, independently of the combination of imposed strains in the two directions. This feature proves a previously unidentified state of matter that can vary its shape freely with no extra mechanical energy like liquids when deformed in the plane. The theory and simulation that explain the unique behavior are also provided. The in-plane liquid-like behavior opens doors for manifold applications, including wrinkle-free membranes and adaptable materials.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1126/sciadv.abe9495DOIArticle
https://advances.sciencemag.org/content/suppl/2021/06/14/7.25.eabe9495.DC1PublisherSupplementary Materials
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8213220PubMed CentralArticle
ORCID:
AuthorORCID
Tokumoto, Haruki0000-0002-3658-3848
Zhou, Hao0000-0002-6011-6422
Kamitani, Kazutaka0000-0002-5000-3467
Kojio, Ken0000-0002-6917-7029
Bhattacharya, Kaushik0000-0003-2908-5469
Urayama, Kenji0000-0002-2823-6344
Additional Information:© 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). Submitted 24 September 2020; Accepted 5 May 2021; Published 18 June 2021. We thank the Osaka Organic Chemical Industry Ltd. for the provision of the diacrylate compounds for the preliminary experiments and S. Okamoto for assistance in the experiments. K.U. is supported by JSPS KAKENHI grant number JP18H02034. K.B. and H.Z. are supported by the U.S. Air Force Office of Scientific Research MURI grant number FA9550-16-1-0566. Author contributions: K.U. conceptualized the experiment. K.B. provided theoretical insights for the experimental results. K.U. and K.B. supervised the project. H.T. and A.T. performed the sample preparation and mechanical tests. K.U., H.T., and A.T. analyzed the mechanical data. H.Z. carried out the full-field 3D simulation. K.Ka., K.Ko., and A.T. conducted the scattering experiments and the data analysis. K.U. and K.B. wrote the paper, and all of the authors edited the manuscript before submission. The authors declare that they have no competing interests. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials. Additional data related to this paper may be requested from the authors.
Funders:
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)JP18H02034
Air Force Office of Scientific Research (AFOSR)FA9550-16-1-0566
Issue or Number:25
PubMed Central ID:PMC8213220
DOI:10.1126/sciadv.abe9495
Record Number:CaltechAUTHORS:20210621-195349634
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210621-195349634
Official Citation:H. Tokumoto, H. Zhou, A. Takebe, K. Kamitani, K. Kojio, A. Takahara, K. Bhattacharya, K. Urayama, Probing the in-plane liquid-like behavior of liquid crystal elastomers. Sci. Adv. 7, eabe9495 (2021)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109510
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:21 Jun 2021 20:30
Last Modified:06 Jul 2021 19:09

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