摘要
为研究硝化棉(NC)气凝胶的微结构及其与热性能的关系,用溶胶-凝胶法以及超临界干燥法制备了硝化棉气凝胶。用扫描电子显微镜(SEM)、X射线衍射(XRD)、热重-红外联用(TG-FTIR)表征了其微观结构、结晶性及热性能。结果表明:NC气凝胶的微观结构为纳米颗粒堆积成的纳米多孔结构。其结晶遭到破坏,呈非晶无序特征。与NC相比,NC气凝胶的DTG峰温及DSC放热峰温度分别提前7℃和11℃,分解热由1429.87 J·g-1提高至1689.21 J·g-1。
To study the microstructure of nitrocellulose（ NC）aerogel and its relationship with thermal properties,NC aerogel was prepared by sol-gel method and supercritical drying. The microstructure,crystallizability and thermal properties of the aerogel were characterized by SEM,XRD and TG/DSC-FTIR methods. Results show that：the microstructure of NC aerogel is nano-porous structure accumulated by nano-particles. The crystallization of NC is destroyed in NC aerogel,presenting amorphous disordered state. In comparison with NC,the DTG peak temperature and DSC exothermic peak temperature of NC aerogel shift 7 ℃ and 12 ℃ downwards,respectively,and the decomposition heat increases from 1429.87 J·g-1 to 1689.21 J·g-1.
出处
《含能材料》
EI
CAS
CSCD
北大核心
2014年第1期26-30,共5页
Chinese Journal of Energetic Materials
基金
爆炸科学与技术国家重点实验室基金(YBKT11-01)
