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Related Experiment Video

Updated: Nov 19, 2025

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
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Experimental Study on Thermosensitive Hydrogel Used to Extinguish Class A Fire.

Li Ma1,2, Xiao Huang1,2, Youjie Sheng1,2

  • 1College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

Polymers
|January 27, 2021
PubMed
Summary

A novel thermosensitive hydrogel effectively suppresses class A fires by increasing water viscosity and wettability. Optimized at 6 wt%, it outperforms commercial agents and prevents re-ignition.

Keywords:
class A fireextinguishing agentthermosensitive hydrogelviscosity

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Area of Science:

  • Polymer Science
  • Fire Safety Engineering
  • Materials Science

Background:

  • Hydrogels enhance water's firefighting properties by increasing viscosity and wettability.
  • Thermosensitive hydrogels offer tunable properties for specialized applications.

Purpose of the Study:

  • Synthesize and characterize a novel thermosensitive hydrogel for effective class A fire suppression.
  • Evaluate the hydrogel's fire extinguishing performance and compare it to existing agents.

Main Methods:

  • Synthesis of a thermosensitive hydrogel using methylcellulose, sodium polyacrylate, and magnesium chloride.
  • Characterization of hydrogel structure, surface activity, and viscosity.
  • Small-scale and large-scale fire extinguishing experiments.

Main Results:

  • The hydrogel exhibited a phase transition between 50 °C and 80 °C, increasing viscosity and reducing surface tension.
  • Optimal fire extinguishing performance was observed at a 6 wt% hydrogel concentration.
  • Large-scale tests showed superior performance compared to commercial water-based agents, with high re-ignition prevention.

Conclusions:

  • The synthesized thermosensitive hydrogel is a highly effective agent for suppressing class A fires.
  • Its unique properties, including temperature-dependent viscosity changes, contribute to its superior performance.
  • The hydrogel presents a promising alternative to conventional firefighting agents.