Recent Advances in Self‐Healable Intelligent Materials Enabled by Supramolecular Crosslinking Design

Liu, Jize; Li, Xinkai; Yang, Xin; Zhang, Xinxing

doi:10.1002/aisy.202000183

Cited by 20 publications

(6 citation statements)

References 97 publications

(176 reference statements)

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“…The former (e.g., styrene−butadiene−styrene triblock polymer) possesses physical cross-linked networks formed by intermolecular interactions and can be thermally reprocessed multiple times under heat conditions. 7,8 However, thermoplastic elastomers often face issues such as poor resistance to high temperature and organic solvents, as well as unsatisfactory mechanical robustness, which substantially limits their utility. 9,10 Therefore, most commonly used elastomers are of the latter type, which are typically fabricated via permanent chemical cross-linking with sulfur or peroxide.…”

Section: Introductionmentioning

confidence: 99%

Semi-Interpenetrating Polyurethane Network with Fatigue Elimination and Upcycled Mechanical Performance

Hao,

Yu,

et al. 2024

Macromolecules

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Recyclable elastomers based on adaptable covalent networks fabricated via different types of dynamic bonds have been designed and prepared to resolve the urgent problems generated by waste elastomers. However, due to inevitable side reactions during thermal recycling (e.g., oxidation, permanent cross-linking), mechanical recovery efficiency after thermal recycling is normally <90% for most recyclable elastomers, making it difficult to achieve comparable performance. Herein, we report a novel semiinterpenetrating network design that achieves mechanical reinforcement after thermal recycling via network topology isomerization and formation of new cross-linking points. The designed semi-interpenetrating network includes an aromatic disulfide bond-containing polyurethane network and long linear polyurethane chains with side-chain vinyl groups. Triggered by heat during reprocessing, the disulfide bonds inside the cross-linked network break and the generated phenyl sulfur radicals undergo thiol−ene reactions with the side-chain vinyl groups in the linear polyurethane chains, resulting in increased cross-linking density. Electron paramagnetic resonance testing, in situ Fourier transform infrared spectrometry, high-temperature stress relaxation testing, and cross-linking density measurements were utilized to monitor the process. The tensile strength and extensibility recycling efficiencies reached 186 and 131% of original values after reprocessing twice, realizing mechanical reinforcement after thermal recycling. Interestingly, based on a similar mechanism, mechanical fatigue after repeated stretch and release cycles was efficiently eliminated upon thermal treatment. Such a strategy achieving polymer design with reinforced physical properties after recycling will benefit practical applications of sustainable elastomers and other thermosetting materials.

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Section: Introductionmentioning

confidence: 99%

Semi-Interpenetrating Polyurethane Network with Fatigue Elimination and Upcycled Mechanical Performance

Hao,

Yu,

et al. 2024

Macromolecules

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“…With the rapid development of big data, artificial intelligence, and fifth-generation (5G) technology, optoelectronic materials, devices, and facilities are gradually improving human production and living standards through the Internet of Things (IoT) [1][2][3][4][5][6]. However, with the shortening of life cycle of optoelectronic products, electronic waste (e-waste) is growing rapidly [7][8][9][10].…”

Section: Introduction mentioning

confidence: 99%

High-entropy perovskite oxides: An emergent type of photochromic oxides with fast response for handwriting display

Wang¹,

Wei²,

Xu³

et al. 2023

Journal of Advanced Ceramics

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Stimulus-responsive materials are fundamental to the broad and ever-growing field of intelligence research, which bridge intelligent systems with the Internet of Things (IoT) in future lifestyles. Among these materials, writable materials have received great interest; however, carbonization and irreversible writing processes are generally inevitable for extensively investigated organic compounds. Photochromism is a potential mode of composing information. Nevertheless, inorganic materials usually exhibit weak photochromic effects. Here, a novel strategy of designing high-entropy perovskite (HEP) oxides is put forward to develop a new inorganic photochromic system with satisfying performance. A series of HEP oxides are synthesized for the first time. Benefiting from excellent photochromic features, real-time information encoding was achieved. The mechanismrelated photochromism is also discussed. Distinct from the previous works, it is believed that the present photochromic-based HEP oxides provide a new and manyfold research space for the future development of conventional writable materials and the disclosing of unprecedented properties and phenomena.

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“…However, under the action of many factors such as stretching, twisting, cutting, compression and excessive usage, the abrasion, degradation or mechanical damage of e-skins is caused inevitably. This weakens its performance and results in failure, followed by seriously reduced reliability and shortened service life [ 8 , 9 , 10 , 11 ]. The high integration of e-skin makes it difficult and costly to maintain after damage.…”

Section: Introductionmentioning

confidence: 99%

Self-Healing Materials-Based Electronic Skin: Mechanism, Development and Applications

Chen

Wang

et al. 2022

Gels

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Electronic skin (e-skin) has brought us great convenience and revolutionized our way of life. However, due to physical or chemical aging and damage, they will inevitably be degraded gradually with practical operation. The emergence of self-healing materials enables e-skins to achieve repairment of cracks and restoration of mechanical function by themselves, meeting the requirements of the era for building durable and self-healing electronic devices. This work reviews the current development of self-healing e-skins with various application scenarios, including motion sensor, human–machine interaction and soft robots. The new application fields and present challenges are discussed; meanwhile, thinkable strategies and prospects of future potential applications are conferenced.

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Recent Advances in Self‐Healable Intelligent Materials Enabled by Supramolecular Crosslinking Design

Abstract: His research interests include nanostructure design and environmental-friendly fabrication of stimulus-responsive materials, interdisciplinary analysis and applications.

Cited by 20 publications

References 97 publications

Semi-Interpenetrating Polyurethane Network with Fatigue Elimination and Upcycled Mechanical Performance

Semi-Interpenetrating Polyurethane Network with Fatigue Elimination and Upcycled Mechanical Performance

High-entropy perovskite oxides: An emergent type of photochromic oxides with fast response for handwriting display

Self-Healing Materials-Based Electronic Skin: Mechanism, Development and Applications

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