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Open AccessArticle

Experimental Study on Thermosensitive Hydrogel Used to Extinguish Class A Fire

by 1,2,*, 1,2, 1,2, 1,2 and 1,2
1
College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
2
Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi’an 710054, China
*
Author to whom correspondence should be addressed.
Academic Editor: Gianluca Tondi
Polymers 2021, 13(3), 367; https://doi.org/10.3390/polym13030367
Received: 22 December 2020 / Revised: 19 January 2021 / Accepted: 21 January 2021 / Published: 24 January 2021
(This article belongs to the Section Polymer Applications)
Hydrogels are crosslinked polymers that become fully swollen when placed in aqueous environments. They are widely used in the field of firefighting because they can remarkably increase the viscosity and wettability of water. In this study, a thermosensitive hydrogel used to effectively suppress class A fire was synthesized by using methylcellulose, sodium polyacrylate, and magnesium chloride. The structure, surface activity and viscosity of the hydrogel were characterized. Fire extinguishing performance was evaluated based on small-scale and large-scale experiments. The results showed that a phase transition of the hydrogel occurred when the temperature rose from 50 °C to 80 °C. After the phase transition, the hydrogel showed a higher viscosity and lower surface tension, which was conducive to attach to the surface of the burning material and acting as an effective barrier to isolate oxygen. The small-scale fire extinguishing tests indicated that the concentration of the hydrogel solution has an eminent influence on fire extinguishing performance. The optimum concentration for extinguishing performance was around 6 wt%. The large-scale experiments demonstrated that the fire-extinguishing performance of this thermosensitive hydrogel was superior to the two other commercial water-based fire extinguishing agents, as it prevented re-ignition highly efficiently. View Full-Text
Keywords: extinguishing agent; thermosensitive hydrogel; class A fire; viscosity extinguishing agent; thermosensitive hydrogel; class A fire; viscosity
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MDPI and ACS Style

Ma, L.; Huang, X.; Sheng, Y.; Liu, X.; Wei, G. Experimental Study on Thermosensitive Hydrogel Used to Extinguish Class A Fire. Polymers 2021, 13, 367. https://doi.org/10.3390/polym13030367

AMA Style

Ma L, Huang X, Sheng Y, Liu X, Wei G. Experimental Study on Thermosensitive Hydrogel Used to Extinguish Class A Fire. Polymers. 2021; 13(3):367. https://doi.org/10.3390/polym13030367

Chicago/Turabian Style

Ma, Li; Huang, Xiao; Sheng, Youjie; Liu, Xixi; Wei, Gaoming. 2021. "Experimental Study on Thermosensitive Hydrogel Used to Extinguish Class A Fire" Polymers 13, no. 3: 367. https://doi.org/10.3390/polym13030367

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