摘要
采用溶胶-凝胶法配制一定比例的S iO2溶胶,恒温(55℃)陈放一定时间后形成凝胶,同时滴加RDX的丙酮溶液,用玻璃基片提拉干燥得到RDX与S iO2质量比为4∶1的复合膜,讨论了温度和溶胶陈化时间对膜质量的影响。结果表明,在温度恒定并且黏结剂含量一定时,溶胶陈化时间短,所得薄膜厚度小,较平整,但黏性小,干燥后脆裂;溶胶陈化时间较长时,所得薄膜厚度大,黏性大,但易结块;扫描电镜显示,RDX/S iO2复合膜中RDX和S iO2分布均匀。溶胶凝胶法制备RDX/S iO2复合膜中组分含量可调,在微型火工品中具有潜在应用价值。
Silica sol was prepared by sol gel method at specific molar ratio and silica gel formed at constant temperature （55℃） through ageing some days while the acetone solution dissolving hexogen （RDX） was dropped into the gel system. The white and sub transparent RDX/SiO2（mass ratio is 4 ： 1） composite film was acquired by dipping and pulling glass substrate out of the gel after drying. The effect of temperature and ageing time on the film was discussed. The experiment results show that if the content of binder keeps constantly and the temperature constant, with the decrease of sol ageing time, the composite film will become thin and smooth, but having less viscous and crack after dying. Contrarily with the increment of ageing time, the composite film will become thick and more viscous, but having agglomeration. The SEM micrograph shows that the particles of RDX and SiO2 distribute uniformly in the composite film. The components of RDX/SiO2 composite film preparing by sol-gel method are controlled randomly, it will display potential application value in micro-initiators and pyrotechnics.
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2009年第2期17-20,共4页
Chinese Journal of Explosives & Propellants
基金
山西省研究生优秀创新项目资助(20081070)
