Effect of nano-aluminum hydroxide on the liquid phase properties and fire-fighting foam performance of the mixed surfactants solution

IF 3.4 3区 工程技术 Q2 ENGINEERING, CIVIL Fire Safety Journal Pub Date : 2024-10-16 DOI:10.1016/j.firesaf.2024.104277
Qingguo Wang, Weixiang Wang, Xing Zhang, Xu Geng, Yuanyuan Zhang
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Abstract

Short-chain fluorocarbon surfactants show synergistic effects with hydrocarbon surfactants in foaming and foam stability. Nano-aluminum hydroxide (nano-ATH) was added as an additive to the short-chain fluorocarbon surfactant mixture solution, which was found to increase the surface tension and viscosity of the surfactant mixture solution, and decrease the foaming properties of the solution, as measured by Wilhelmy method, Waring Blender method and viscometer. By measuring zeta potential experiments, surfactant molecules were found to be adsorbed on nano-ATH through charge gravity, which increased the desorption energy of nano-ATH. Measuring the visco-elastic modulus of the solution by rheometer, it was found that nano-ATH increased the visco-elastic modulus of the surfactant mixture solution, which improved the foam's resistance to the external disturbances. Observed by the image analysis system on the foam, the uniform distribution of nano-ATH in the liquid film reduced the coarsening and coalescence speed of foam. Through the self-developed oil resistance test, nano-ATH enhanced the oil resistance stability and inhibition of fuel vapor diffusion of the foam by about 12 %; through self-developed foam fire extinguishing and anti-burning tests, nano-ATH shortened the fire extinguishing time of the two-phase foam by 25 %, and showed better fire extinguishing and anti-burning performance than the foam.
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纳米氢氧化铝对混合表面活性剂溶液液相性质和灭火泡沫性能的影响
短链碳氟化合物表面活性剂与碳氢化合物表面活性剂在发泡和泡沫稳定性方面具有协同作用。在短链碳氟化合物表面活性剂混合溶液中加入纳米氢氧化铝(nano-ATH)作为添加剂,经 Wilhelmy 法、Waring Blender 法和粘度计测定,发现纳米氢氧化铝会增加表面活性剂混合溶液的表面张力和粘度,降低溶液的发泡性能。通过测量 zeta 电位实验发现,表面活性剂分子通过电荷引力吸附在纳米ATH 上,从而增加了纳米ATH 的解吸能。通过流变仪测量溶液的粘弹性模量,发现纳米 ATH 增加了表面活性剂混合溶液的粘弹性模量,提高了泡沫的抗外界干扰能力。通过泡沫图像分析系统观察,纳米 ATH 在液膜中的均匀分布降低了泡沫的粗化和凝聚速度。通过自发耐油试验,纳米-ATH 增强了泡沫的耐油稳定性和抑制燃料蒸汽扩散的能力,提高了约 12%;通过自发泡沫灭火和防燃烧试验,纳米-ATH 使两相泡沫的灭火时间缩短了 25%,灭火和防燃烧性能优于泡沫。
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来源期刊
Fire Safety Journal
Fire Safety Journal 工程技术-材料科学:综合
CiteScore
5.70
自引率
9.70%
发文量
153
审稿时长
60 days
期刊介绍: Fire Safety Journal is the leading publication dealing with all aspects of fire safety engineering. Its scope is purposefully wide, as it is deemed important to encourage papers from all sources within this multidisciplinary subject, thus providing a forum for its further development as a distinct engineering discipline. This is an essential step towards gaining a status equal to that enjoyed by the other engineering disciplines.
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