A Fast Responsive Thermosensivtive P(NIPAM/AA-Na) Hydrogel and its Fire Suppressing Experiment

Abstract:

A fast responsive thermosensitive hydrogel poly((N-isopropy- lacrylamide/Sodium acrylate) (P(NIPAm/AA-Na)) were prepared by free radical polymerization methods. The low critical soluble temperatures (LCST) of the hydrgols is about 60°C in 5%wt aqueous solutions. The heterogeneous macroporous structure was observed by SEM. Deswelling degree of the hydrogel is up to 75% in 60 seconds. The 1A rating wood stacking fire were suppressed with water, colloid extinguishing agent B of Zhejiang University and the thermosensitive P(NIPAm/AA-Na) hydrogel respectively. Radiant heat and the temperature were recorded by several heat probes and thermocouples during extinguishing. The results showed that the fire extinguishing-time of the thermosensitive hydrogel is shortest at the same practical rate of application among the three. Consumption of extinguishing agent is the least. The water damage to the section unfired is low after fire extinguishing. The extinguishing agent residual is easy to clean, so the extinguishing efficiency is high.

• Periodical: Advanced Materials Research (Volume 668)
• Pages: 219-225
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.668.219
• Online since: March 2013
• Authors: Chun Lei Jia, Wang Qun, Kai Tang
• Keywords: Extinguishing Agent, Extinguishing Efficiency, Hydrogel, Low Critical Soluble Temperature (LCST), Thermosensitive

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