Zhang, Huan, Zeng, Dezhi, Pan, Yifei, Chen, Yinjun, Ruan, Yonghong, Xu, Yuanze, Boulatov, Roman 
ORCID: 0000-0002-7601-4279, Creton, Costantino and Weng, Wengui
(2019)
Mechanochromism and optical remodeling of multi-network elastomers containing anthracene dimers.
CHEMICAL SCIENCE, 10 (36).
pp. 8367-8373.
ISSN 2041-6520, 2041-6539
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Abstract
Multi-network elastomers are both stiff and tough by virtue of containing a pre-stretched stiff network that can rupture and dissipate energy under load. However, the rupture of this sacrificial network in all described covalent multi-network elastomers is irreversible. Herein, we describe the first example of multi-network elastomers with a reformable sacrificial network containing mechanochemically sensitive anthracene-dimer cross-links. These cross-links also make our elastomers mechanochromic, with coloration that is both persistent and reversible, because the fluorogenic moiety (anthracene dimer) is regenerated upon irradiation of the material. In proof-of-concept experiments we demonstrate the utility of incorporating anthracene dimers in the backbone of the sacrificial network for monitoring mechanochemical remodeling of multi-network elastomers under cycling mechanical load. Stretching or compressing these elastomers makes them fluorescent and irradiating them eliminates the fluorescence by regenerating anthracene dimers. Reformable mechanochromic cross-links, exemplified by anthracene dimers, hold potential for enabling detailed studies of the molecular origin of the unique mechanical properties of multi-network elastomers.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 34 Chemical Sciences, 3406 Physical Chemistry |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 19 Aug 2019 15:04 |
| Last Modified: | 07 Dec 2024 08:45 |
| DOI: | 10.1039/c9sc02580d |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3052145 |
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