Fire Science and Technology ›› 2024, Vol. 43 ›› Issue (12): 1714-1718.
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Xu Jie1, Wang Lili2, Shao Yiwei2, He Hualing1, Yu Zhicai1,2
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Abstract: In order to develop a flexible composite material for fire warning, MXene/aramid aerogel fibers for fire warning were successfully prepared by microfluidic spinning and freeze-drying using aramid nanofibers as the substrate. Scanning electron microscopy, vertical combustion test and fire warning test were used to explore the surface morphology, thermoelectric and thermal stability of fibers with different MXene mass fraction and before/after polymerization of PPy. The results show that, with the increase of MXene content, the conductivity and mechanical properties of composite fibers also increase. When the MXene mass fraction reaches 40%, the electrical conductivity and mechanical strength of the composite fibers can reach 1 372.76 s/m and 1.36 MPa, respectively. At the same time, based on the unique Seebeck effect of thermoelectric materials, the fire warning aerogel fiber can accurately sense the temperature in the temperature range of 100~300 ℃, and can also generate a voltage of 1.89 mV within 3.5 s after contact with the flame without external power supply, triggering the early warning, providing timely evacuation signals for people.
Key words: fire warning, temperature sensing, MXene, polypyrrole, aerogel fiber
Xu Jie, Wang Lili, Shao Yiwei, He Hualing, Yu Zhicai. Preparation and properties study of MXene/aramid fire warning aerogel fiber[J]. Fire Science and Technology, 2024, 43(12): 1714-1718.
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