氟
表面改性
氧化物
激进的
材料科学
氧化铝
铝
纳米颗粒
化学工程
纳米材料
化学
纳米技术
有机化学
复合材料
冶金
物理化学
工程类
作者
Wanjun Zhao,Qingjie Jiao,Yapeng Ou,Rongjie Yang,Yanli Zhu,Sheng Wang
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2021-06-10
卷期号:4 (6): 6337-6344
被引量:17
标识
DOI:10.1021/acsanm.1c01231
摘要
Aluminum nanoparticle (nAl) has a promising application prospect in energetic materials (EMs) due to its high reactivity. However, some issues like agglomeration and oxide layers seriously affect its performances. To actualize the potential of nAl, perfluoroalkyl acids (PFAAs) with different molecular structures were introduced into nAl-based EMs for surface functionalization in the current work. The energy performances of nAl/PFAAs including flame propagation features and heat release were investigated in different atmospheres, and the related fluorine fixation ratio (FFR) was also obtained. Results show that both the energy performances and the FFR were improved with the increase of the skeleton chain length and the fluorine content of PFAAs. Although the heat release is higher in air, FFR in air is apparently lower than that in N2. Possible reaction mechanisms were probed by the in-situ monitoring of the gaseous and condensed products from thermal decomposition. This reveals that the oxide layer was first corroded by carboxyl, and fluorocarbons were generated succeeded by the fluorination of exposed Al. The most reactive intermediates are CFx free radicals, which dominates the initial interaction.
科研通智能强力驱动
Strongly Powered by AbleSci AI