摘要
为了提高杀菌高能薄膜的燃烧性能和碘含量,使用Al/Ca(IO_(3))_(2)/30%PVDF膜(30PVDF)封装39%Al/Ca(IO_(3))/(5%或10%)PVDF铝热剂(5PVDF或10PVDF)得到“三明治”结构的3、5、7和9层薄膜,并通过燃速和火焰温度测试以及DSC-TG热分析研究了铝热剂层活性及其分布结构(层数和厚度)对“三明治”结构薄膜燃烧性能和释能效应的影响规律,同时探究了薄膜各组分间的反应温度和反应机理。结果表明,封装39%5PVDF铝热剂“三明治”结构薄膜比封装10PVDF的燃速高18%~35%,表现出更好的燃烧性能,其中5层薄膜具有最大燃速,二者分别为10.2 cm/s和8.6 cm/s,综合了30PVDF膜层的厚度、低燃速和膜-铝热剂层在界面的传质传热效率的影响;并且多层薄膜的平均火焰温度随着铝热剂厚度的减小而增加。DSC-TG结果表明,Al/Ca(IO_(3))_(2)/PVDF基多层薄膜主要在330~410℃发生Al-Ca(IO_(3))_(2)-PVDF释碘放热反应,Ca(IO_(3))_(2)/PVDF(质量为1.55∶1)在320~350℃的剧烈放热反应和燃烧产物中的AlF 3、CaF 2、CaO等进一步证实了该反应的发生。
In order to improve the combustion performance and iodine content of high-energy bactericidal films,several Al/Ca(IO_(3))_(2)/PVDF laminated films(3,5,7 and 9 layers)packaging 39%Al/Ca(IO_(3))/(5%or 10%)PVDF thermite(5PVDF or 10PVDF)were designed and prepared.The influence of the thermite reactivity(5PVDF or 10PVDF)and its distribution structure(multilayers and thickness)on the reaction temperature,energy release,combustion performance and mechanism of the laminated films were studied by DSC-TG analysis,burning rate and flame temperature tests.Furthermore,the reaction temperature and mechanism between each component of the laminated film were determined.The results show that laminated films encapsulating 39%5PVDF thermite exhibits 18%—35%higher burning rate than that of packaging 10PVDF thermite.Especially,the laminated films with 5 layers display the highest burning rates of 10.2 cm/s and 8.6 cm/s,respectively,which combines the effects of the thickness and low burning rate of the 30PVDF layer,the mass and heat transfer efficiency of the film-thermite layer at the interface.Moreover,the average flame temperature of the laminated films increase with the decrease of the thickness of the thermite.DSC-TG results indicate that the Al/Ca(IO_(3))_(2)/PVDF-based laminated films exhibit the exothermic iodine release reaction zone of Al-Ca(IO_(3))_(2)-PVDF at 330—410℃.The Ca(IO_(3))_(2)/PVDF at a mass ratio of 1.55∶1 exhibits an intense exothermic reaction at 320—350℃,while the AlF 3,CaF 2,CaO,etc are determined in combustion products,which both suggests the reaction path of Al-Ca(IO_(3))_(2)-PVDF.The study preliminarily reveals the combustion law and mechanism of Al/Ca(IO_(3))_(2)/PVDF-based laminated films sandwiching thermite,providing a new technological solution for sterilization of high-energy materials.
作者
陈苏杭
唐魁
谢晓
唐振华
柯香
秦钊
徐抗震
赵凤起
CHEN Su-hang;TANG Kui;XIE Xiao;TANG Zhen-hua;KE Xiang;QIN Zhao;XU Kang-zhen;ZHAO Feng-qi(National Key Laboratory of Energetic Materials,Xi′an Modern Chemistry Research Institute,Xi′an 710065,China;State Key Laboratory of Transient Chemical Effects and Control,Xi′an 710061,China;School of Chemical Engineering,Xi′an Key Laboratory of Special Energy Materials,Northwest University,Xi′an 710069,China;College of Chemistry and Materials Engineering,Anhui Science and Technology University,Bengbu Anhui 233000,China)
出处
《火炸药学报》
北大核心
2025年第1期78-87,I0006,共11页
Chinese Journal of Explosives & Propellants
基金
应用物理化学重点实验室开放课题基金(No.WDYX22614260206)
国防重点实验室基金(No.2021-JCJQ-LB-037)
安徽省自然科学基金(No.2108085QE199)。
