Journal
MATERIALS LETTERS
Volume 318, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2022.132237
Keywords
Porous materials; Composite materials; Thermal insulation; Fire warning; Flame retardant
Funding
- Key Research and Development Project of Hubei Province [2021BCA216, 2021BCA151]
- National Innovation and Entrepreneurship Training Program for College Students [202110497002]
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The newly developed fire-alarm aerogel exhibits good flame-retardant and thermal insulating properties, providing quick fire warning and sustained performance.
Flame-retardant thermal insulation materials (TIMs) with a function of fire warning will play a critical role in the fields of sustainable energy saving and fire safety. Herein, we fabricated a fire-alarm aerogel based on biomass sodium alginate and hydroxyapatite, introduced with graphene oxide. This aerogel exhibits good thermal insulating properties due to its porous network. The composite aerogel displays good flame-retardant performance and can provide early fire warning detection. At room temperature, the aerogel is electrically insulating, but it switches to an electrical state when exposed to flame. The aerogel connected with an alarm light can give ultrafast response time (within 1.5 s) and sustained warning time (over 60 s) under sudden fire attacks. This modified aerogel provides a promising strategy for the functional application of TIMs.
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