DEVELOPMENT OF FIRE EXTINGUISHING POWDER FORMULATIONS WITH SUPERHYDROPHOBIC AND EASY-FLOWING PROPERTIES
Rubrics: 2. CHEMICAL TECHNOLOGY
Authors:
1.
Institut tehnicheskoy himii UrO RAN - filial Permskogo federal'nogo issledovatel'skogo centra UrO RAN
Type:
Article
Pages:
from 176
to 180
Status:
In work
Language:
Russian
Keywords:
FIRE EXTINGUISHING POWDER COMPOSITION, AMMOPHOS, SILICON DIOXIDE, SUPERHYDROPHOBICITY, FLOWABILITY OF POWDER COMPOSITION
Abstract (English):
Within the framework of this research, we have developed a highly effective fire extinguishing powder composition (FEP). Its efficiency and smooth operation are guaranteed by its flowability during application and minimal moisture absorption during storage. The study has allowed us to determine the optimal proportion of components in the functional filler based on amorphous silica, specifically white soot 120 and Aerosil 380. This enables us to control the rheological properties of FEP, minimizing the interaction between particles of the active extinguishing agent and enhancing flowability. The mass fraction of the filler needed to achieve a superhydrophobic state of the composition decreases as the specific surface area of the sample increases. This allows for a larger area of particles in the extinguishing agent to be covered with a smaller amount of filler. The presence of Aerosil 380 particles significantly reduces FEP resistance to dynamic flow, ensuring a superhydrophobic state of the composition's surface. These results in decreased moisture absorption and increased flowability of FEP, consequently extending the operational time of fire suppression systems equipped with this newly developed composition. An increase in the amount of the added functional filler above a certain level leads to an increase in the adhesion and moisture absorption of the powder particles, as a result of larger agglomerates of filler, more contacts between them, and a worse distribution over the surface of the ammonium phosphate particles.
Within the framework of this research, we have developed a highly effective fire extinguishing powder composition (FEP). Its efficiency and smooth operation are guaranteed by its flowability during application and minimal moisture absorption during storage. The study has allowed us to determine the optimal proportion of components in the functional filler based on amorphous silica, specifically white soot 120 and Aerosil 380. This enables us to control the rheological properties of FEP, minimizing the interaction between particles of the active extinguishing agent and enhancing flowability. The mass fraction of the filler needed to achieve a superhydrophobic state of the composition decreases as the specific surface area of the sample increases. This allows for a larger area of particles in the extinguishing agent to be covered with a smaller amount of filler. The presence of Aerosil 380 particles significantly reduces FEP resistance to dynamic flow, ensuring a superhydrophobic state of the composition's surface. These results in decreased moisture absorption and increased flowability of FEP, consequently extending the operational time of fire suppression systems equipped with this newly developed composition. An increase in the amount of the added functional filler above a certain level leads to an increase in the adhesion and moisture absorption of the powder particles, as a result of larger agglomerates of filler, more contacts between them, and a worse distribution over the surface of the ammonium phosphate particles.
Keywords:
FIRE EXTINGUISHING POWDER COMPOSITION, AMMOPHOS, SILICON DIOXIDE, SUPERHYDROPHOBICITY, FLOWABILITY OF POWDER COMPOSITION
FIRE EXTINGUISHING POWDER COMPOSITION, AMMOPHOS, SILICON DIOXIDE, SUPERHYDROPHOBICITY, FLOWABILITY OF POWDER COMPOSITION
