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Abstract

Chameleon-like Self-Healing Flexible Materials Based on Ferrocenyl-Containing Polysiloxanes †

by
Anastasia N. Kocheva
,
Konstantin V. Deriabin
* and
Regina M. Islamova
Institute of Chemistry, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia
*
Author to whom correspondence should be addressed.
Presented at the 1st International Online Conference on Biomimetics (IOCB 2024), 15–17 May 2024; Available online: https://sciforum.net/event/IOCB2024.
Proceedings 2024, 107(1), 922; https://doi.org/10.3390/proceedings2024107003
Published: 15 May 2024
Animals such as chameleons change their skin colour in case of potential threat and recover damaged tissues [1]. Some ferrocenyl-containing polymers are similar to chameleon skin in terms of their colour-changing behaviour. For instance, they exhibit electrochromic properties due to an easily reversible one-electron redox transition [2].
Another feature of chameleons represented in polymer materials is their self-healing ability. One of the most promising self-healing materials is silicone rubber [3]. Some silicone materials possess self-healing properties achieved through siloxane equilibrium. This mechanism is based on reversible interactions between “living” anionic centres and polysiloxane chains [2,3].
The siloxane equilibrium discussed above allowed us to prepare unique chameleon-like ferrocenyl-containing silicone rubbers (FSRs) which exhibit both electrochromic and self-healing properties [2]. Thus, FSRs were obtained via ring-opening anionic copolymerisation of cyclic siloxane monomers including octamethylcyclotetrasiloxane (D4), tetraferrocenyl-substituted cyclotetrasiloxane (1,3,5,7-(2-ferrocenylethyl)-1,3,5,7-tetramethylcyclotetrasiloxane, Fc4D4), and bicyclic cross-linking agent (bis-D4). The physicochemical properties of the FSRs were estimated by tensile tests and cyclic voltammetry. As a result, the tensile strength of the FSRs reached 0.1 MPa, and the elongation at break was up to 215%. After one hour, the self-healing efficiency of FSR reached 98% at 25–100 °C. The FSRs also possess redox activity (Fc/Fc+ transformations at E0 = 0.43 V) and electrical conductivity at the level of antistatic materials (approximately 10−10 S cm−1). The FSR films change their colour from yellow (reduced state) to blue (oxidised state). Our chameleon-inspired materials could find potential applications as redox-active and flexible electrochromic coatings.

Supplementary Materials

The following supporting information can be downloaded at: https://www.mdpi.com/article/10.3390/proceedings2024107003/s1.

Author Contributions

Investigation, A.N.K. and K.V.D.; writing—original draft preparation, A.N.K.; writing—review and editing, R.M.I.; supervision, R.M.I.; funding acquisition, K.V.D. All authors have read and agreed to the published version of the manuscript.

Funding

This research was funded by the Russian Science Foundation (project № 23-23-00103).

Institutional Review Board Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

The data supporting this article have been included as a part of the Supporting Information.

Conflicts of Interest

The authors declare no conflict of interest.

References

  1. Zheng, R.; Wang, Y.; Jia, C.; Wan, Z.; Luo, J.; Malik, H.A.; Weng, X.; Xie, J.; Deng, L. Intelligent biomimetic chameleon skin with excellent self-healing and electrochromic properties. ACS Appl. Mater. Interfaces 2018, 10, 35533–35538. [Google Scholar] [CrossRef] [PubMed]
  2. Rashevskii, A.A.; Deriabin, K.V.; Parshina, E.K.; Islamova, R.M. Self-Healing Redox-Active Coatings Based on Ferrocenyl-Containing Polysiloxanes. Coatings 2023, 13, 1282. [Google Scholar] [CrossRef]
  3. Deriabin, K.V.; Filippova, S.S.; Islamova, R.M. Self-Healing Silicone Materials: Looking Back and Moving Forward. Biomimetics 2023, 8, 286. [Google Scholar] [CrossRef] [PubMed]
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Share and Cite

MDPI and ACS Style

Kocheva, A.N.; Deriabin, K.V.; Islamova, R.M. Chameleon-like Self-Healing Flexible Materials Based on Ferrocenyl-Containing Polysiloxanes. Proceedings 2024, 107, 922. https://doi.org/10.3390/proceedings2024107003

AMA Style

Kocheva AN, Deriabin KV, Islamova RM. Chameleon-like Self-Healing Flexible Materials Based on Ferrocenyl-Containing Polysiloxanes. Proceedings. 2024; 107(1):922. https://doi.org/10.3390/proceedings2024107003

Chicago/Turabian Style

Kocheva, Anastasia N., Konstantin V. Deriabin, and Regina M. Islamova. 2024. "Chameleon-like Self-Healing Flexible Materials Based on Ferrocenyl-Containing Polysiloxanes" Proceedings 107, no. 1: 922. https://doi.org/10.3390/proceedings2024107003

APA Style

Kocheva, A. N., Deriabin, K. V., & Islamova, R. M. (2024). Chameleon-like Self-Healing Flexible Materials Based on Ferrocenyl-Containing Polysiloxanes. Proceedings, 107(1), 922. https://doi.org/10.3390/proceedings2024107003

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