基于冷冻干燥共结晶工艺的热气溶胶灭火剂

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (1): 64-67.

基于冷冻干燥共结晶工艺的热气溶胶灭火剂

刘思雨，朱晨光，张明星

南京理工大学化工学院，江苏南京210094

出版日期:2021-01-15 发布日期:2021-01-15
作者简介:刘思雨（1996-），女，南京理工大学化工学院硕士研究生，主要从事气溶胶灭火剂的研究，江苏省南京市玄武区孝陵卫200 号，210094。
基金资助:
国家自然科学基金项目（51676100）

Hot aerosol extinguishing agent based on freeze-drying co-crystallization process

LIU Si-yu, ZHU Chen-guang, ZHANG Ming-xing

School of Chemical Engineering, Nanjing University of Science and Technology, Jiangsu Nanjing 210094, Chin

Online:2021-01-15 Published:2021-01-15

摘要/Abstract

摘要：

利用冷冻干燥共结晶工艺改善热气溶胶灭火剂的燃烧与灭火性能。将硝酸钾按照45%～60%递增、乳糖按照55%～40%对应递减的8 组比例进行共结晶工艺处理，并与机械混合的同样比例成份的热气溶胶灭火剂进行灭火效率对比分析。灭火性能测试结果表明，共结晶工艺可以使热气溶胶灭火剂的喷射时间和灭火时间显著缩短，硝酸钾和乳糖质量比为4.75︰4.25 时灭火效果最好，灭火时间由6.91 s 缩短至1.00 s。通过SEM, TG/DSC, PXRD 和FTIR 等测试手段对共结晶产品进行了表征，结果均说明有不同于原材料的共结晶产物的生成。

Abstract: To improve the combustion and fire- extinguishing performance of hot aerosol extinguishing agents (HAEAs), a new type of HAEA was prepared by freeze-drying co-crystallization process in this paper. Eight groups of HAEAs with an increasing mass ratio of 45% ~ 60% potassium nitrate and a decreasing mass ratio of 55% ~ 40% lactose were co- crystallized and compared with the mechanically mixed HAEAs of the same composition and proportion. The results of fire- extinguishing performance test show that the co- crystallization process can significantly shorten the extinguishing time of the HAEAs. The fire- extinguishing effect was best when the ratio of potassium nitrate to lactose was 4.75:4.25, and the fire-extinguishing time was shortened from 6.91s to 1.00 s. The co- crystallized products were characterized by scanning electron microscope (SEM), thermal analysis (TG/DSC), powder X- ray diffraction (PXRD), and Fourier transform infrared reflection (FTIR). The results indicated that there were co-crystallized products different from raw materials.

Key words: co- crystallization, hot aerosol extinguishing agent, extinguishing efficiency

刘思雨, 朱晨光, 张明星. 基于冷冻干燥共结晶工艺的热气溶胶灭火剂[J]. 消防科学与技术, 2021, 40(1): 64-67.

LIU Si-yu, ZHU Chen-guang, ZHANG Ming-xing. Hot aerosol extinguishing agent based on freeze-drying co-crystallization process[J]. Fire Science and Technology, 2021, 40(1): 64-67.