Heat resistance characteristics of aerogel spherules for thermal insulation lining in flame environment

doi:10.16265/j.cnki.issn1003-3033.2020.05.008

Abstract

Abstract: In order to reduce or prevent heat injuries for firefighters in rescue activities, with SiO₂ aerogel powder, polyvinyl alcohol and water as raw materials, aerogel spherules, filling for thermal insulation lining of fire-protection suits, were developed, whose compression deformation rate was less than 15.83%. Firstly, its heat-resistant mechanism and influencing factors of heat conduction were investigated. Then, microstructure was characterized and specific surface area was tested. Finally, heat resistance experiment was carried out at different flame temperatures. The results show that when at same testing temperature, the greater degree of blackening of its surface is, the longer it takes. When it is lower than 168.2 ℃, the maximum blackening degree of surface is 80%. Along with increase of temperature, the time required to reach a certain blackening degree decreases gradually. It is also found that weight loss rate of aerogel spherules is smaller than that of aerogel powders.

Key words: flame environment, thermal insulation lining, aerogel spherules, heat resistance, microstructure

CLC Number:

X932

LU Yi, YANG Fan, SHI Shiliang, WU Fanghua, WANG Jinpeng. Heat resistance characteristics of aerogel spherules for thermal insulation lining in flame environment[J]. China Safety Science Journal, 2020, 30(5): 48-53.

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