摘要
采用湿混法分别制备了含KNO_(3)、Ba(NO_(3))_(2)、KClO_(4)、Fe_(2)O_(3)氧化剂的Al/PTFE体系(氧化剂质量分数3%、12%、15%),并利用同步热分析仪分析了氧化剂类型、质量分数及升温速率对材料热分解性能及反应活性的影响。研究结果表明:引入氧化剂能够破坏Al_(2)O_(3)壳层和促进碳产物完全氧化,从而提升了Al/PTFE的反应活性。KNO_(3)质量分数为12%的Al/PTFE体系效果最为显著,失重温度提前了6.97%,表观活化能降至128.63 kJ·mol^(-1);Fe_(2)O_(3)、硝酸盐单一氧化剂体系的反应活性高于Fe_(2)O_(3)与硝酸盐复配体系,说明所研究的复合氧化体系之间存在相容性问题。
Al/PTFE composites incorporating KNO_(3),Ba(NO_(3))_(2),KClO_(4),and Fe_(2)O_(3)(mass fractions:3%,12%,and 15%)were prepared via wet mixing.The effects of oxidant type,mass fraction,and heating rate on thermal decomposition behavior and reactivity were investigated using simultaneous thermal analysis(STA).The results demonstrate that oxidant addition enhances reactivity by disrupting the inert Al_(2)O_(3)shell and promoting complete oxidation of carbonaceous residues.The most significant improvement was observed in Al/PTFE composites with KNO_(3)mass fraction of 12%,which advanced the onset decomposition temperature by 6.97%and reduced the apparent activation energy to 128.63 kJ·mol^(−1).Furthermore,systems with a single oxidant(Fe_(2)O_(3)or nitrate)exhibited superior reactivity compared to those containing combined Fe_(2)O_(3)/nitrate oxidizers,suggesting a compatibility issue within the studied specific composite oxidizers.
作者
景甜媛
王金英
苏子璇
崔锐宁
李元鑫
JING Tianyuan;WANG Jinying;SU Zixuan;CUI Ruining;LI Yuanxin(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China)
出处
《中北大学学报(自然科学版)》
2025年第6期776-783,共8页
Journal of North University of China(Natural Science Edition)
关键词
活性材料
Al/PTFE
热分解
反应活性
活化能
reactive materials
Al/PTFE
thermal decomposition
reaction activity
activation energy
