Physical properties and fire extinguishing performance of hydrophobic aluminum hydroxide-ionic liquid-modified dry water powder

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-31 DOI:10.1016/j.powtec.2025.120996

Wenjie Wang , Xiaolong Zhu , Jiangyue Zhao , Lingfeng Zeng , Ruiqing Tao , Chuanyu Pan , Xishi Wang

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引用次数: 0

Abstract

In order to improve the poor storage stability and fire-extinguishing performance of dry water powder, this study utilized hydrophobic aluminum hydroxide as the shell additive and ionic liquid as the core additive, and the influence of the composition ratio on its physical properties and fire-extinguishing performance was experimentally investigated. The results show that the dry water containing 22.22 % hydrophobic aluminum hydroxide and 2 % ionic liquid exhibited the best overall performance. The addition of ionic liquid and aluminum hydroxide improved the surface/interfacial properties of the solid shell and the internal liquid, thus increasing the number of hydrogen bonds and the molecular forces between the internal liquids. Additionally, the addition of ionic liquid significantly reduced the evaporation rate of the solution, aluminum hydroxide nanoparticles filled the voids of the dry water shell. These two effects enhanced the pressure resistance and moisture retention of the modified dry water by 46.36 % and 85.69 %, respectively, compared to unmodified dry water. Aluminum hydroxide interrupted the combustion chain reaction by effectively capturing free radicals during combustion. Meanwhile, ionic liquid promoted fire extinguishing through the effects of heat absorption by the imidazolium ring, interruption of the chain reaction, and dissolution of the fuel. With the combined effects, the fire extinguishing efficiency of dry water was improved by 53.49 %. This study provides a novel high-efficiency fire extinguishing material for fire suppression in narrow/obstructed spaces, susceptible to water-stain loss, etc. The findings are significant for elucidating the formation conditions of dry water and innovating its preparation methods.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.