Mechanical properties of elastic aerogel spherules for fire-fighting clothes filling

doi:10.16265/j.cnki.issn1003-3033.2020.07.027

Abstract

Abstract: In order to protect firemen from injuries in rescue activities, elastic aerogel spherules for thermal insulation lining filling of fire-fighting clothes were prepared with SiO₂aerogel powder, ammonia free latex and water as raw materials. Firstly, their mechanical conduction mechanism was investigated. Then, macro morphology, microstructure characterization and specific surface area were measured. Finally, their mechanical properties were tested at different pressures. The results show that microstructure of elastic aerogel spherules was more compact than that of aerogel powder. When pressure of a single spherule reaches 2 kN, samples will be cracked partially, and forces transmitted decrease from circle 1 to 5, especially evident at 4^th cycle. But spherules will not crack if they take pressure of 15 kN as a whole. It is found that insulation lining of fire-fighting clothes should be made up of a center spherule with regular hexagon and 1-3 circles of elastic aerogel spherules.

Key words: fire-fighting clothes, elastic aerogel spherules, microstructure, mechanical property, filling method

CLC Number:

X924.4

YANG Fan, LU Yi, LIU Yilun, SHI Shiliang, WANG Jinpeng, LI Songhui. Mechanical properties of elastic aerogel spherules for fire-fighting clothes filling[J]. China Safety Science Journal, 2020, 30(7): 180-185.

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