Elastomers mechanically reinforced and toughened with CO2 gas
Gas-responsive polymers have recently attracted considerable interest as unconventional smart materials that provide a new path toward the utilization of specific gases including CO 2 . Herein, we report gas-responsive elastomers that enhance mechanical properties, such as modulus, strength, stretch...
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Veröffentlicht in: | Communications materials 2024-03, Vol.5 (1), p.20-9, Article 20 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Gas-responsive polymers have recently attracted considerable interest as unconventional smart materials that provide a new path toward the utilization of specific gases including CO
2
. Herein, we report gas-responsive elastomers that enhance mechanical properties, such as modulus, strength, stretchability, and toughness with CO
2
gas. Various types of amine groups are introduced into polydimethylsiloxane elastomers to achieve the gas-induced mechanical reinforcement. In these elastomers, the amines form ionic crosslinks with CO
2
gas that mechanically strengthen the materials. Furthermore, nanodomains formed via microphase separation of the ionic components behave similarly to viscoelastic nanofillers that dissipate a large amount of energy during deformation, thereby remarkably toughening the elastomers. Surprisingly, the fracture energy of the elastomer with diamine increases ~35 times in CO
2
gas compared with that in N
2
gas. Furthermore, the elastomers sensitively respond even to CO
2
gas concentrations as low as 10 % and are remarkably toughened. Our design concept is widely applicable to the CO
2
reinforcement of other polymers, such as polyethylene.
Gas-responsive polymers are unconventional smart materials that utilizes specific gases. Here, polydimethylsiloxane elastomers appended with amine groups react with CO
2
leading to gas-induced mechanical reinforcement. |
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ISSN: | 2662-4443 2662-4443 |
DOI: | 10.1038/s43246-024-00457-9 |