A healable, mechanically robust and ultrastretchable ionic conductive elastomer for durably wearable sensor

Zhang, Guoxian; Li, Chunmei; Tan, JiaoJun; Wang, Mingqi; Ren, Yafeng; Ge, Feijie; Zhang, Qiuyu

doi:10.1007/s12274-023-6194-9

Nano Res.

2023

DOI: 10.1007/s12274-023-6194-9

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A healable, mechanically robust and ultrastretchable ionic conductive elastomer for durably wearable sensor

Guoxian Zhang,

Chunmei Li,

JiaoJun Tan

et al.

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2024

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Cited by 2 publications

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Strong and Tough Self‐Healing Elastomers via BTA‐Mediated Microstructure and Metal‐ligand Coordination

Huang,

Lai,

et al. 2024

Macromol. Rapid Commun.

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Creating elastomers with high strength, toughness, and rapid self‐healing remains a key challenge. These seemingly contradictory properties require innovative design strategies. Herein, a novel approach is proposed by simultaneously incorporating a unique triple hydrogen bond unit, benzene‐1,3,5‐tricarboxamide (BTA), and imidazole‐Zn2+ dynamic coordination into the elastomer. The BTA forms rigid fibers through self‐assembly via triple hydrogen bonding, inducing microphase separation that significantly enhances the material's properties. Hydrogen bonds and coordination interactions provide dynamic reversibility and self‐healing, achieving a balance of strength, toughness, and healing capabilities. By varying the BTA content and the degree of coordination crosslinking, the elastomer's strength is tunable within 8.79–2.03 MPa, and it boasts an impressive elongation at a break of up to 700%. Remarkably, it recovers 94.6% of its strength after being cut in half, facilitated by treatment with DMF at 70 °C for 24 h. Furthermore, the integration of carbon nanotubes endows the material with resistance‐sensing, enabling real‐time monitoring of human movements. Overall, this study lays a theoretical foundation and introduces innovative concepts for the development of high‐toughness self‐healing elastomers.

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Strong and Tough Self‐Healing Elastomers via BTA‐Mediated Microstructure and Metal‐ligand Coordination

Huang,

Lai,

et al. 2024

Macromol. Rapid Commun.

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Supramolecular Cross-Linked High-Performance Self-Healing Elastomers toward Wearable Sensing Applications

Li,

Zhang,

et al. 2024

Ind. Eng. Chem. Res.

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Flexible conductive elastomers play a pivotal role in biosensing, electronic skin, and wearable devices. However, fabricating selfhealing conductive elastomers with superior mechanical properties remains a formidable challenge. Here, we introduce a simple strategy for the preparation of a flexible elastomer that integrates stretchability, conductivity, and self-healing capabilities. Initially, the self-healing lipoic acid (LA) and conductive deep eutectic solvents (DES) are thermally initiated ring-opening copolymerized, yielding a linear copolymer P(LA-DES). This polymer is then integrated with linear polyurethane by intermolecular hydrogen bonds, followed by the incorporation of Fe 3+ ions to form a dynamic cross-linked network containing disulfide bonds, hydrogen bonds, and metal coordination. This supramolecular cross-linked elastomer not only exhibits remarkable mechanical and conductive properties but also demonstrates stable and reliable signal response capabilities when used as a strain sensor. The elastomer possesses a tensile strength of 4.63 MPa and an elongation at break of 893%, with an electrical conductivity of up to 2.67 × 10 −4 S•m −1 . Moreover, it achieves a healing efficiency exceeding 90% when subjected to 80 °C for healing for 24 h. Additionally, the elastomer-based strain sensor is capable of sensitively detecting human joint motion, underscoring its potential for applications in the realm of flexible wearable devices and health monitoring.

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A healable, mechanically robust and ultrastretchable ionic conductive elastomer for durably wearable sensor

Cited by 2 publications

References 50 publications

Strong and Tough Self‐Healing Elastomers via BTA‐Mediated Microstructure and Metal‐ligand Coordination

Strong and Tough Self‐Healing Elastomers via BTA‐Mediated Microstructure and Metal‐ligand Coordination

Supramolecular Cross-Linked High-Performance Self-Healing Elastomers toward Wearable Sensing Applications

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