Biodegradable and flame-retardant cellulose-based wearable triboelectric nanogenerator for mechanical energy harvesting in firefighting clothing

Yu, Zhicai; Zhu, Zhenyu; Zhang, Yingzi; Li, Xiaoqian; Liu, Xin; Qin, Yi; Zheng, Zhenrong; Zhang, Lianyang; He, Hualing

doi:10.1016/j.carbpol.2024.122040

Cited by 49 publications

(1 citation statement)

References 42 publications

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“…Indeed, a steeper curve between 200 and 300 °C, in correspondence with both a DTG broad signal and the above-mentioned DSC peak (zone II), can be evidenced. This finding is in agreement with other studies on PPy-treated cellulose [68][69][70], suggesting that PPy enhances carbonizing reactions, reducing the temperature of thermal degradation. Samples C(P) and D(P), buried in very different conditions, reflected more the profile of the bare cotton and the asprepared cotton-PPy, respectively.…”

Section: Thermal Analysessupporting

confidence: 93%

Behavior of polypyrrole-coated cotton fabric undergoing biodegradation in compost-enriched soil

Piccioni,

Varesano,

Tummino

2024

Environ. Res. Commun.

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This study investigated the biodegradation behavior of cotton fabrics treated with polypyrrole, a polymer with conductive and antibacterial properties. Fabric samples were buried in compost-enriched soil for 10, 30 and 90 days. The biodegradation level was initially estimated by a visual inspection of the fibers and by the determination of the fabric weight loss. Other physical-chemical changes of fibers during the biodegradation process were analyzed by microscopy, thermal analyses and infrared spectroscopy. The surface resistivity of the fabrics was also measured. The results obtained comparing the bare cotton samples and the polypyrrole-added ones suggested that, on the one hand, polypyrrole hindered/delayed the biodegradation of cotton in compost-enriched soil, probably exercising its inherent antimicrobial feature during the first period of burial. On the other hand, over time, polypyrrole seemed to represent the first compound attacked by the microorganisms, preserving the cotton substrate. Despite the absence of dedicated literature regarding polypyrrole biodegradation, the mechanism hypothesized in this paper involves the loss of conjugation, as a consequence of de-doping, oxidized functionalities up to local cycle breaking.

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Section: Thermal Analysessupporting

confidence: 93%

Behavior of polypyrrole-coated cotton fabric undergoing biodegradation in compost-enriched soil

Piccioni,

Varesano,

Tummino

2024

Environ. Res. Commun.

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Fully‐Recyclable Green and Fire‐Resistant Triboelectric Elastomer via Geometrical Synergistic Fillers and Its Applications for Smart Firefighting Boots

Chu,

Wu,

Wei

et al. 2024

Adv Funct Materials

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Wearable sensors for high temperatures (WSHT) applications pose a significant challenge in the electronics field due to the inherent inability of most electronics to function in harsh environments. Triboelectric nanogenerators (TENG) present a substantial potential for applications in such challenging conditions. Herein, a fully‐recyclable flame‐retardant triboelectric elastomer is developed, which exhibits superior charge stability under high temperature conditions and proposes the specially designed synergistic fillers that play a dual role by trapping more charges into the interface and stabilizing the char layers via layer‐ball‐layer structure. An efficient flame‐retardant system is presented, which exhibits a 31% lower fire growth index than the individual components. The maximum surface charge density of this triboelectric elastomer can reach 361 µC m−2, while this surface charge density can be preserved to 70.9% after 16 s of combustion (≈520 °C) and to 37.9% by continuously working at 130 °C. At last, utilizing this flame‐retardant triboelectric elastomer, smart firemen's boots featuring gait analysis for identification and second level early warning systems have been developed. This work paves the way for the development of triboelectric materials and intelligent wearable devices suitable for applications in harsh environments.

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Mechanically Robust and Thermal Insulating Silica/Aramid Nanofiber Composite Aerogel Fibers with Dual Networks for Fire‐Resistant and Flexible Triboelectric Nanogenerators

Li,

Hu,

Pan

et al. 2024

Adv Funct Materials

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Aerogel fibers, known for their lightweight and exceptional thermal insulation properties, provide an ideal material solution for fabricating triboelectric nanogenerators (TENGs) for self‐powered wearable electronics in extreme environments, such as firefighting gear. However, current aerogel fibers face limitations due to their poor mechanical properties and lack of performance stability under harsh conditions. Herein, a facile strategy for preparing silica/aramid nanofiber (ANF) composite aerogel fibers with interpenetrated dual networks and a silica‐dominant component (≈64 wt.%) is demonstrated; the unique structure and composition endow the composite aerogel fibers with high tensile strength (3.4 MPa), low thermal conductivity (0.033 W (m·K)−1), a large specific surface area (587 m2 g−1), and outstanding fire resistance at 95% porosity, combining the best properties of both ANF and silica aerogel. Moreover, the composite aerogel fibers exhibit excellent mechanical flexibility at extremely low temperatures (−196 °C) and maintain structural integrity even when exposed to flame for up to 5 min. Leveraging these exceptional properties, composite aerogel fiber‐based TENGs show high electrical output performance before and after combustion (>94% retention). The fabrication strategy offers promising opportunities for modulating the properties and functionalities of aerogel fibers on demand, holding great potential for future applications in wearable smart protective fabrics for extreme environments.

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Biodegradable and flame-retardant cellulose-based wearable triboelectric nanogenerator for mechanical energy harvesting in firefighting clothing

Cited by 49 publications

References 42 publications

Behavior of polypyrrole-coated cotton fabric undergoing biodegradation in compost-enriched soil

Behavior of polypyrrole-coated cotton fabric undergoing biodegradation in compost-enriched soil

Fully‐Recyclable Green and Fire‐Resistant Triboelectric Elastomer via Geometrical Synergistic Fillers and Its Applications for Smart Firefighting Boots

Mechanically Robust and Thermal Insulating Silica/Aramid Nanofiber Composite Aerogel Fibers with Dual Networks for Fire‐Resistant and Flexible Triboelectric Nanogenerators

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