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Designing Supertough and Ultrastretchable Liquid Metal-Embedded Natural Rubber Composites for Soft-Matter Engineering

Banerjee, Shib Shankar; Mandal, Subhradeep; Arief, Injamamul; Layek, Rama Kanta; Ghosh, Anik Kumar; Yang, Ke; Kumar, Jayant; Formanek, Petr; Fery, Andreas; Heinrich, Gert; Das, Amit (2021-03-29)

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banerjee_et_al_designing_supertough_final_draft.pdf (1.475Mb)
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Post-print / Final draft

Banerjee, Shib Shankar
Mandal, Subhradeep
Arief, Injamamul
Layek, Rama Kanta
Ghosh, Anik Kumar
Yang, Ke
Kumar, Jayant
Formanek, Petr
Fery, Andreas
Heinrich, Gert
Das, Amit
29.03.2021

ACS Applied Materials and Interfaces

ACS Publications

School of Engineering Science

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© 2021 American Chemical Society
https://doi.org/10.1021/acsami.1c00374
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe202103319074

Tiivistelmä

Functional elastomers with incredible toughness and stretchability are indispensable for applications in soft robotics and wearable electronics. Furthermore, coupled with excellent electrical and thermal properties, these materials are at the forefront of recent efforts toward widespread use in cutting-edge electronics and devices. Herein, we introduce a highly deformable eutectic-GaIn liquid metal alloy-embedded natural rubber (NR) architecture employing, for the first time, industrially viable solid-state mixing and vulcanization. Standard methods of rubber processing and vulcanization allow us to fragment and disperse liquid metals into submicron-sized droplets in cross-linked NR without compromising the elastic properties of the base matrix. In addition to substantial boosts in mechanical (strain at failure of up to ∼650%) and elastic (negligible hysteresis loss) performances, the tearing energy of the composite was enhanced up to 6 times, and a fourfold reduction in the crack growth rate was achieved over a control vulcanizate. Moreover, we demonstrate improved thermal conductivity and dielectric properties for the resulting composites. Therefore, this work provides a facile and scalable pathway to develop liquid metal-embedded soft elastomeric composites that could be instrumental toward potential applications in soft-matter engineering.

Lähdeviite

Banerjee, S.S., Mandal, S., Arief, I., Layek, R.K., Ghosh, A.K., Yang, K., Kumar, J., Formanek, P., Fery, A., Heinrich, G., Das, A. (2021). Designing Supertough and Ultrastretchable Liquid Metal-Embedded Natural Rubber Composites for Soft-Matter Engineering. ACS Applied Materials and Interfaces. DOI: 10.1021/acsami.1c00374

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