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Thermally stable and workable triboelectric nanogenerators (TENGs) are vital and highly efficient in searching and rescuing survivors. They serve as an effective alternative to fire alarms due to their self-powered monitoring of the movements at the fire scenes. However, TENGs are limited in complex environments for their unfavorable strength, flexibility, and robustness. In this work, strong, flexible, and robust plasma-treated aramid nanofiber-based (p-ANF-based) textiles were obtained by performing surface treatment, deprotonation, wet spinning, and polymerization on their surface. The p-ANF-based textiles-TENGs (t-TENGs) showed excellent output performance (80 V, 20 μA) and work stability at high temperatures (120 °C), which was up to 40% compared to room temperature and was caused by abundant amide bonds and thermal stability. More importantly, p-ANF-based t-TENGs could accurately transmit life statements and escape routes of survivors by accurately transmitting signals in high-temperature environments. At the same time, the acid, alkali, ultraviolet (UV), and heat deformation resistance of the p-ANF-based t-TENGs led to multiple functions of passive heating, temperature protection, Morse code transmission, and conduction. The p-ANF-based t-TENGs with high strength, high toughness, and robustness showed great potential in guiding rescuers to specify purposeful search and rescue plans and improve the efficiency of rescuing survivors in fire scenes. [Display omitted] • Robust and flexible ANFs-based textiles-TENGs were prepared. • ANFs-based textiles-TENG devices transmitted signals stably in high-temperature environments. • Wearable textiles-TENG devices integrate multiple functions. • ANFs-based textiles-TENG showed acid, alkali and UV resistant. [ABSTRACT FROM AUTHOR]

Graphene/cotton fibers show significant promise in wearable energy storage due to their low cost, porous structure, and exceptional integration ability into wearable systems. However, the eco-unfriendly reductants and standalone electric double-layer capacitor hindered their application. Herein, a green and rapid hydrothermal-electrodeposition method was proposed to fabricate polyaniline (PANI) decorated reduced graphene oxide (rGO)/cotton yarns without using any chemical reductants and oxidants. The PANI/rGO/cotton (PRC) yarn exhibited porous conductive network, structural controllability, and mechanical flexibility. Additionally, the PRC yarn electrode delivers a fast electron transport and ion migration, synergistic energy storage contribution, and a controllable capacitance (up to 81.2 mF cm−1 at 0.2 mA cm−1). The assembled yarn supercapacitor shows a good capacitance (19.8 mF cm−1 at 0.08 mA cm−1), excellent energy-power density (2.7 μWh cm−1 at 40 μW cm−1), and great capacitance retention. This green fabrication of PRC yarns brings new insights into the development of wearable energy storage. [Display omitted] • Polyaniline/reduced graphene oxide/cotton (PRC) composite yarn was made. • A green and rapid hydrothermal-electrodeposition method was proposed. • PRC yarn shows porous conductive network, structural controllability, and flexibility. • PRC yarn electrode shows fast electron/ion transport and synergistic capacitance. • PRC yarn supercapacitor shows good specific capacity, power density and cycle ability. [ABSTRACT FROM AUTHOR]

[Display omitted] • Collagen/carboxylated CNF composite aerogels are successfully fabricated. • CDs can promote the in vitro self-assembly behavior of collagen. • CDs are beneficial for improving the properties of the collagen composite aerogels. • Composite aerogels have an excellent pH-responsive for drug delivery system. pH-responsive materials have great potential for use in various advanced fields, such as microreactors and drug delivery. This work proposes a promising strategy for preparing composite aerogels with pH-responsive properties based on collagen (COL) and TEMPO-oxidized cellulose nanofibers (CNFs) through the self-assembly behavior of COL molecules for controlled-drug release. COL fibrils and carboxylated CNFs (cCNFs) exhibited a high-density, physical cross-linked supramolecular double network structure. Specifically, cyclodextrins (CDs) were introduced to optimize the structural stability and slow-release capability of the composite aerogels. Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analyses were used to characterize the structure of the aerogels, and the swelling behavior and water contact angle of the aerogels were evaluated. Using 5-fluorouracil (5-FU) as the model drug, the slow-release mechanism was subsequently revealed. Compared with the COL aerogels and COL/cCNF composite aerogels, the COL/cCNF@CD composite aerogels exhibited enhanced structural stability and slow-release performance through the synergistic enhancement effect of cCNFs and CDs. The aerogels also exhibited sensitivity to pH for regulating 5-FU release, and the COL composite aerogels with CDs and cCNFs maintained excellent cytocompatibility. In conclusion, CDs had a positive effect on the structural stability and pH-responsiveness of the composite aerogels and promoted the possible utilization of aerogels in drug delivery systems. [ABSTRACT FROM AUTHOR]