主管:中华人民共和国应急管理部
主办:应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU

Fire Science and Technology ›› 2024, Vol. 43 ›› Issue (12): 1714-1718.

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Preparation and properties study of MXene/aramid fire warning aerogel fiber

Xu Jie1, Wang Lili2, Shao Yiwei2, He Hualing1, Yu Zhicai1,2   

  1. (1. College of Textile Science and Engineering, Wuhan Textile University, Hubei Wuhan 430200, China;2. Jiangsu Hengli Chemical Fiber Co., Ltd., Jiangsu Suzhou 215288, China)
  • Online:2024-12-15 Published:2024-12-15

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