Flexible and multifunctional triboelectric nanogenerator based on liquid metal/polyvinyl alcohol hydrogel for energy harvesting and self-powered wearable human–machine interaction

Zhou, Hou-Wang; Zhao, Cong; Zhao, Ze-Yu; Jiang, Jun-Chen; Jin, Hui-Le; Wang, Shun; Pan, Shuang; Xu, Min-Yi; Chen, Yi-Huang; Jin, Hai-Ming

doi:10.1007/s12598-023-02518-3

Rare Met.

2023

DOI: 10.1007/s12598-023-02518-3

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Flexible and multifunctional triboelectric nanogenerator based on liquid metal/polyvinyl alcohol hydrogel for energy harvesting and self-powered wearable human–machine interaction

Hou-Wang Zhou,

Cong Zhao,

Ze-Yu Zhao

et al.

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2024

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Cited by 21 publications

References 45 publications

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Functional Liquid Metal Polymeric Composites: Fundamentals and Applications in Soft Wearable Electronics

Liang,

Tee

2024

Adv Funct Materials

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Wearable and self‐healing soft electronics have led to a significant emphasis on their potential in creating versatile, conformable, and sustainable electronic modules. Among conductive additives, Liquid metals (LMs), combining both solid and liquid characteristics, have gained widespread attention due to their versatile physical, chemical, and electrical properties as well as self‐healing capability, biocompatibility, and recyclability. The fluidity of LMs facilitates adaptability to various experimental conditions and components for specific applications. Moreover, the oxide shell on LMs exhibits strong compatibility with surface functionalization and polymerization processes, enhancing the development of reliable composite materials. Herein, an in‐depth analysis of the fundamental properties and characteristics of LMs while addressing their current drawbacks, such as unpredictable reactivity and poor surface stability, is presented. To harness the advantages of LMs, their integration is extensively discussed with polymeric materials through various grafting strategies, leading to the development of macromolecular composites with exceptional softness, solubility, surface functionalization, and versatility. Furthermore, the applications of LMs within LM‐elastomer composites, particularly focusing on their relevance in specific fields such as flexible electronics, are investigated. Finally, LMs' future prospects are emphasized by highlighting their compatibility with self‐healing polymers, thereby providing pathways for major breakthroughs of LMs based devices.

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Functional Liquid Metal Polymeric Composites: Fundamentals and Applications in Soft Wearable Electronics

Liang,

Tee

2024

Adv Funct Materials

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Innovations in Tactile Sensing: Microstructural Designs for Superior Flexible Sensor Performance

Wu,

Li,

Bao

et al. 2024

Adv Funct Materials

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Tactile sensors have garnered considerable interest for their capacity to detect and quantify tactile information. The incorporation of microstructural designs into flexible tactile sensors has emerged as a potent strategy to augment their sensitivity to pressure variations, thereby enhancing their linearity, response spectrum, and mechanical robustness. This review underscores the imperative for progress in microstructured flexible tactile sensors. Subsequently, the discourse transitions to the prevalent materials employed in the fabrication of sensor electrodes, encapsulation layers, and active sensing mediums, elucidating their merits and limitations. In‐depth discussions are devoted to tactile sensors adorned with microstructures, including but not limited to, micropyramids, microhemispheres, micropillars, microporous configurations, microcracks, topological interconnections, multilevel constructs, random roughness, biomimetic microstructures inspired by flora and fauna, accompanied by exemplar studies from each category. Moreover, the utility of flexible tactile sensors within the realm of intelligent environments is explicated, highlighting their application in the monitoring of physiological signals, the detection of sliding motions, and the discernment of surface textures. The review culminates in a critical examination of the paramount challenges and predicaments that must be surmounted to further the development and enhance the functional performance of tactile sensors, paving the way for their integration into advanced sensory systems.

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Enhancement of epoxy‐cyanate ester blends through staged curing‐induced nanophase separation strategy

Xie,

Zhao,

Pan

et al. 2024

J of Applied Polymer Sci

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Epoxy‐cyanate ester blends have attracted significant attention due to their unique synergistic properties and versatility in high‐performance applications. However, achieving precise control over the phase‐separated structures in these blends remains a challenge. In this work, we present a strategy for the preparation of epoxy‐cyanate ester blends with high‐performance through staged curing‐induced phase separation. By incorporating a thermally latent catalyst, 4‐ethyl‐2‐methylimidazole tetraphenylborate, into the epoxy‐anhydride‐cyanate system, the reactivity differences of multiple curing reactions within the blend were precisely controlled, thereby inducing the formation of well‐defined nanophase‐separated structures. The polymer systems prepared exhibit high mechanical properties and heat resistance, primarily due to the interpenetrating networks created by the epoxy‐anhydride‐cyanate ester and the formation of nanodomains induced by the staged curing process. Furthermore, epoxy‐cyanate ester blends demonstrate outstanding hygrothermal resistance due to the low polarity of the crosslinked network structure. This work provides new insights into regulating the microstructure of the thermosetting blends and expands the potential applications of these materials in fields requiring long‐term durability and reliability.

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Flexible and multifunctional triboelectric nanogenerator based on liquid metal/polyvinyl alcohol hydrogel for energy harvesting and self-powered wearable human–machine interaction

Cited by 21 publications

References 45 publications

Functional Liquid Metal Polymeric Composites: Fundamentals and Applications in Soft Wearable Electronics

Functional Liquid Metal Polymeric Composites: Fundamentals and Applications in Soft Wearable Electronics

Innovations in Tactile Sensing: Microstructural Designs for Superior Flexible Sensor Performance

Enhancement of epoxy‐cyanate ester blends through staged curing‐induced nanophase separation strategy

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