Abstract Taking advantage of solid and liquid fire extinguishants in one material is desirable, especially for the selection of liquid phase components aimed at specific fire disaster situations. In this investigation, the feasibility of novel dry liquids with core-shell structure as fire extinguishants in liquid fuel fires was conducted. The microencapsulated functional materials were formed by the high-speed shearing method, which were then characterized for their liquid content, micromorphology, particle size, and fluidity. The surface tension of inner liquids and hydrophobicity of outer shell were the critical factors for the preparation and the addition of Gellangum enhanced the structural strength, and the formed gel-type particles reduced the rate of water loss by at least 50%. The fire extinguishing efficiency of gel-type dry liquids was obtained by the consumption and times of fire suppression compared to the dry powder and water mist, both in small and medium scale tests. The obtained results indicated that the performance of gel-type dry water is comparable to that of ultrafine dry powder in small-scale cyclohexane fire based on a total flooding ejection with a dosage of 44.3% lower than that of water mist as the consumption of ultrafine dry powder, gel-type dry water and water mist was 48.7g, 47.6g, and 85.4g, respectively. The efficiency of gel-type dry water in gasoline fire was increased from 13.4 to 27.7% with the increase in pressure from 0.5 to 1.0 MPa and fire power from 0.05 to 0.25 MW compared to the water mist with the dosages of gel-type dry water and water mist were 35.2g and 40.6g in small scale, meanwhile 262.7g and 363.3g in medium scale. The performance in diesel is 12.7% higher than that of gasoline fire under the same experimental conditions. The unique properties of gel-type dry liquids are due to their suspension characteristics and limited evaporation, and the mechanism of extinguishing is the result of comprehensive synergetic effects of cooling, dilution, homogeneous chemical, and heterogeneous inhibition.

中文翻译：

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含钾水溶液@Nano-SiO2 的新型干液扑灭液体燃料火灾的实验研究：制备、应用和稳定性

摘要 固体和液体灭火剂在一种材料中的优势是可取的，特别是对于针对特定火灾情况的液相组分的选择。在这项调查中，研究了具有核壳结构的新型干液体作为液体燃料火灾灭火剂的可行性。通过高速剪切法形成微囊化功能材料，然后对其液体含量、微观形貌、粒径和流动性进行表征。内部液体的表面张力和外壳的疏水性是制备的关键因素，结冷胶的加入增强了结构强度，形成的凝胶型颗粒使失水率降低了至少50%。在中小规模试验中，凝胶型干液体的灭火效率是通过灭火消耗量和灭火次数与干粉和细水雾相比得到的。所得结果表明凝胶型干水在小规模环己烷火灾中的性能与超细干粉在全淹没喷射的情况下相当，用量比细水雾的用量低44.3%作为超细颗粒的消耗量。干粉、凝胶型干水和水雾分别为48.7g、47.6g和85.4g。凝胶型干水在汽油火灾中的燃烧效率随着压力从0.5增加到1.0 MPa和火力从0.05增加到0.25 MW而与添加凝胶型干水的细水雾相比提高了13.4%到27.7%和细水雾分别为35.2g和40.6g，同时中型为262.7g和363.3g。在同等实验条件下，柴油燃烧性能比汽油燃烧性能高12.7%。凝胶型干液的独特性质是由于其悬浮特性和有限的蒸发，其灭火机理是冷却、稀释、均相化学和非均相抑制综合协同作用的结果。