摘要
为了将多孔硅应用于新型含能材料,研究了经硅烷偶联剂稳定化处理的多孔硅/Pb3O4的反应性能。用电化学腐蚀法制备了多孔硅,用KH550、KH560和KH570改性了多孔硅,制成了10/90-多孔硅/Pb3O4点火药。用氧弹、DSC、TG、MS测定了多孔硅/Pb3O4点火药的反应性能,用XRD分析了多孔硅/Pb3O4点火药分解和燃烧后的残渣。结果表明:(1)经硅烷偶联剂KH550、KH560、KH570处理的多孔硅/Pb3O4点火药(样品2、样品3、样品4)的放热量低于未经硅烷偶联剂处理的多孔硅/Pb3O4点火药(样品1),但其放热峰温度未发生改变,表明硅烷偶联剂只影响多孔硅/Pb3O4点火药分解反应的动力学行为;(2)样品1～4燃烧热值的降低次序为样品2>样品3>样品4>样品1;(3)多孔硅/Pb3O4点火药分解和燃烧后的残渣为氧化铅和硅酸铅;(4)硅烷偶联剂KH550、KH560和KH570可使多孔硅在空气中的稳定性提高。
For applications of porous silicon in energetic materials field, the reactivity of porous silicon/Pb3O4 modified by silane coupling agents was studied. The porous silicon used in this work was fabricated by an electrochemical etching technique and modified by KH550, KH560 and KH570, and the 10/90-porous silicon/Pb3O4 ignition composition was prepared. The reactive performances of the ignition composition were measured by oxygen bomb, DSC, TG and mass spectrometry. The residues after decomposition and combustion were analyzed by XRD. The results show that： （1） the heats released from samples 2, 3 and 4 modified by silane coupling agents KH550, KH560 and KH570 respectively, are higher than that of sample I , which is not modified by silane coupling agents, but their temperatures of exothermic peaks are same, showing that the silane coupling agents just affect the kinetic behavior of decomposition reaction of the ignition composition; （2） The values of combustion heat of samples 1 -4 decrease in the order： sample 2 〉sample 3 〉sample 4 〉sample 1 ; （3） the residues of all porous silicon/Pb3O4 after decomposition and combustion are PbO and lead silicate, respectively; （4） the KH550, KH560 and KH570,make the stability of the porous silicon in air enhance.
出处
《含能材料》
EI
CAS
CSCD
北大核心
2012年第4期400-405,共6页
Chinese Journal of Energetic Materials
关键词
应用化学
多孔硅
硅烷偶联剂
稳定化
反应性能
applied chemistry
porous silicon
silane coupling agent
stabilizing
chemical property
