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Updated: Feb 25, 2026

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination
Published on: March 1, 2020
Application of water@silica core-shell particles for suppressing gasoline pool fires
Xiaomin Ni1, Shaogang Zhang1, Zhong Zheng2
1The State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, PR China.
Abstract:
A new type of dry powders with capsular structure was fabricated for fire suppression, in which the content of water approached 60%. The capsules with the size of 3-5μm consisted of liquid core and solid shell, where the core was water droplet and the shell was assembled silicon dioxide particles with surface hydrophobic modification. The shell of close-packed silica particles surrounding each water droplet provided the structural rigidity of the capsules and enabled their application as powder fire suppressants. Two different scaled real fire tests showed that thus-prepared solid powders could extinguish 0.21MW gasoline pool fire in 2.0s with agent mass of 0.055kg, and 1.0MW gasoline pool fire in 5.0s with agent mass of 0.49kg. Such fire extinguishing performance greatly outperformed the conventional monoammonium phosphate (ABC) powders, neat silica powders and water mist, with significantly reduced fire extinguishing time and mass of agent consumed. Mechanism of the core-shell particles in fire suppression was discussed based on established theories and experimental results.
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