Novel silica hydrogel-based forest fire extinguishing agent: Construction, fire extinguishing performance and mechanism study

IF 9.7 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Minmin Xu, Yuxin Wei, Ao Qin, Yue Xu, Miaojun Xu, Bin Li, Lubin Liu
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Abstract

The frequent occurrence of forest fires has caused a great threat to the ecological environment and the safety of human life and property. How to effectively prevent and control forest fires has become a top priority. However, water-based fire extinguishing agents commonly used in forest fires possessed the problems of poor spraying effectiveness, adhesion and spreading, and fire extinguishing efficiency. Inspired by the porous thermal insulation materials, a novel silica hydrogel-based fire extinguishing agent (SiKP) was successfully prepared by micro-crosslinking silica aerogel and introducing phosphorus and potassium fire extinguishing elements. SiKP showed excellent high-temperature adhesion properties on wood surfaces and their pH meets the requirements of its application. After spraying SiKP, the open flame of the wood stacks was extinguished quickly within 2 s and the smoldering time of wood stacks was 29.71% less than that of pure water. The phosphorus- and potassium-containing free radicals and inert gases from the decomposition of SiKP effectively interrupted the free radical chain reaction and diluted the combustible gas concentration in gas phase. Besides, SiKP promoted the dehydration and charring of forest vegetation and the formation of a compact barrier char layer effectively prevents the transfer of heat and flammable volatiles in condensed phase. Consequently, the total heat and total smoke release of NW/Si3K3P6 were decreased by 51.05% and 72.86% compared with pure pine. This novel forest fire extinguishing agent with excellent adhesion, fire extinguishing, and sustained fire resistance properties shows great value for the prevention and control of forest fires.

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来源期刊
Journal of Cleaner Production
Journal of Cleaner Production 环境科学-工程:环境
CiteScore
20.40
自引率
9.00%
发文量
4720
审稿时长
111 days
期刊介绍: The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.
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