摘要
采用钛酸四乙酯、异丙醇铝、硅酸四甲酯为交联剂制备了新型硝化棉凝胶,通过溶解实验和控制变量实验验证了硝化棉凝胶的生成及其交联反应的活性点,用傅里叶变换红外光谱仪(FTIR)表征了凝胶的化学结构,用数字显微镜观察了凝胶的形貌,通过干燥实验表征了凝胶的载液性能,采用热重分析仪(TG)和差示扫描量热仪(DSC)分析了凝胶的热稳定性能。结果表明,3种交联剂能与硝化棉反应生成凝胶;交联剂与未酯化羟基发生酯交换反应;钛酸四乙酯、异丙醇铝硝化棉凝胶胶囊发育良好,具有较强的载液性能;与纯硝化棉相比,有机钛硝化棉凝胶第一分解放热峰温度提前54.3℃;有机硅硝化棉凝胶的放热峰温度基本无变化;有机铝硝化棉凝胶起始热分解温度提高8.7℃。
New nitrocellulose gels were prepared by using tetraethyl titanate,aluminum isopropoxide and tetramethyl orthosilicate as crosslinking agents.The generation and its activity point of crosslinking reaction for nitrocellulose gels were verified by the solubility experiment and the control variable experiment.The chemical structures of the gels were characterized by a Fourier transform infrared spectrometer（FTIR）and the morphologies were observed by a digital microscope.The performance of gel carrier fluid was characterized by a drying experiment.Thermal stability of the gels were analyzed using thermogravimetric analyzer（TG）and differential scanning calorimeter（DSC）.The results show that the three kinds of crosslinking agents can react with nitrocellulose to form a gel.The crosslinking agent and unesterified hydroxyl occurs the transesterification.The tetraethyl titanate/aluminum isopropoxide/nitrocellulose gel capsules are well developed with strong performance of the carrier liquid.Compared with pure nitrocellulose,the first decomposition temperature of organic titanium/nitrocellulose gel shifts 54.3℃downwards.No change in the exothermic peak temperature of the organic silicon/nitrocellulose gel is observed.The initial decomposition temperature of organic aluminum/nitrocellulose gel is increased by 8.7℃.
作者
张翔
黄振亚
潘胜
胡向明
徐军
白玉奇
ZHANG Xiang;HUANG Zhen-ya;PAN Sheng;HU Xiang-ming;XU Jun;BAI Yu-qi(School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Beijing AOXIN Technology Development Co.,Ltd.,Beijing 100040,China)
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2018年第3期256-260,266,共6页
Chinese Journal of Explosives & Propellants
关键词
材料科学
硝化棉凝胶
酯交换反应
热稳定性
交联剂
载液性能
material science
nitrocellulose gel
transesterification
thermal stability
crosslinker
liquid carrier performance
