具有更高化学活性和更长防火保护的超疏水和超疏油超细干粉灭火剂。
Superhydrophobic and oleophobic ultra-fine dry chemical agent with higher chemical activity and longer fire-protection.
机构信息
State Key Laboratory of Fire Science, University of Science of Technology of China, 230026, PR China.
State Key Laboratory of Fire Science, University of Science of Technology of China, 230026, PR China.
出版信息
J Hazard Mater. 2019 Dec 15;380:120625. doi: 10.1016/j.jhazmat.2019.05.018. Epub 2019 Jul 5.
The re-ignition of pool fires is a common hazard phenomenon in fire extinguishing. Dry chemicals with oleophobicity may solve this problem because powders can float on the oil surface and prevent evaporation of fuel pool. In this research, MAPP (modified ammonium polyphosphate) with superhydrophobicity, oleophobicity, and higher chemical activity is prepared which can quickly quench pool fires and provide longer protection. The activation indexes of MAPP for water, diesel, aviation kerosene and gasoline are 98.5%, 87.4%, 98.7% and 98.4%, respectively. Lower activation energy of MAPP means that it will show higher chemical activity in fire. The fire-extinguishing performance of MAPP is much higher than that of Commercial UDCA (ultra-fine dry chemical agent) during fire experiments. After extinguished by MAPP, the fuel pool is hard to be re-ignited. The significance of this study is to propose a new strategy for preventing the re-ignition of pool fires.
复燃是灭火中常见的危险现象。具有疏油性的干粉可能会解决这个问题，因为粉末可以漂浮在油面上，防止燃料池蒸发。在这项研究中，制备了具有超疏水性、疏油性和更高化学反应活性的改性聚磷酸铵（MAPP），它可以迅速扑灭池火并提供更长时间的保护。MAPP 对水、柴油、航空煤油和汽油的活化指数分别为 98.5%、87.4%、98.7%和 98.4%。较低的 MAPP 活化能意味着它在火灾中表现出更高的化学反应活性。在火灾实验中，MAPP 的灭火性能远高于商用 UDCA（超细干粉灭火剂）。用 MAPP 扑灭后，燃料池很难再次被点燃。这项研究的意义在于提出了一种防止池火复燃的新策略。
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