Transient and recyclable organic microwave resonator using nanocellulose for 5G and Internet of Things applications

Tanguy, Nicolas R.; Moradpour, Maryam; Jain, Mandeep Chhajer; Yan, Ning; Zarifi, Mohammad H.

doi:10.1016/j.cej.2023.143061

Cited by 9 publications

(1 citation statement)

References 52 publications

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“…Elastomers are widely used as substrates for fabricating flexible electronic devices − as they possess excellent resilience performance and allow for excellent conformal contact with the body or internal organ surfaces to enable strain sensing with high sensitivity for potential applications in soft robotics, human–machine interfaces5, − and healthcare. − Electronic waste generated after service failure from wearable flexible devices causes serious pollution and has attracted widespread attention and deserves to be disposed of. Thermoplastic elastomer − with physical cross-linking via supramolecular interaction such as hydrogen bonding, − metal coordination, − and ionic interaction or microphase separation structures combined − by these interactions have been widely employed to fabricate healable and recyclable wearable electronic devices, but at the expense of sacrificing the resilience performance and creep resistance which has a big influence on the sensitivity and service stability of the fabricated devices.…”

Section: Introductionmentioning

confidence: 99%

Room-Temperature Dynamic and Creep-Resistant Covalent Adaptive Networks via Phase-Locked Benzimidazole Urea Bonds: Toward Recyclable Elastomers for Wearable Electronic Devices

Xie,

Wang,

Lai

et al. 2023

ACS Sustainable Chem. Eng.

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The rapid development of flexible electronic devices has resulted in serious electronic pollution, which has aroused great attention in recent years. This study focuses on the development of dynamic cross-linking poly(dimethylsiloxane) (PDMS) elastomers with covalent adaptive network structures that can be recycled by a solvolytic approach to address this challenge. The elastomer is prepared through the addition reaction between amine-terminated PDMS, isophorone diisocyanate, and 2-aminobenzimidazole followed by cross-linking with hexamethylene diisocyanate trimer. The secondary ureidobenzimidazole (SUBI) moieties formed by benzimidazole and isocyanate groups can undergo a six-memberedring transition state, enabling automatic dissociation and reformation character at room temperature. Hydrogen-bonded aggregates formed by SUBI moieties work as physical cross-linking units to protect urea bonds from dissociation, which endows the materials with excellent creep-resistant performance. Decomposition of the aggregates by solvation, releasing the SUBI moieties, is mainly responsible for the recycling process. Wearable electronic devices with a microcrack structure for vibratory monitoring are assembled through 3D printing nanosilver paste onto the elastomer with predesigned structure. The excellent recycling performance can be transferred from the PDMS substrate to the devices, which enables the separation of PDMS and nanosilver, providing promising principles to develop facile degradable materials at room temperature for fabricating recyclable wearable electronic devices.

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