含能材料2017，Vol.25Issue(1)：53-58,6.DOI:10.11943/j.issn.1006-9941.2017.01.009
喷雾结晶法制备高堆积密度球形硝基胍
Preparation of High Bulk Density Spherical NQ by Spray Crystallization Method
摘要
Abstract
To improve the bulk density and fluidity of nitroguanidine(NQ),spherical NQ crystal was prepared by spray crystallization method using N-methyl pyrrolidone as the solvent of NQ,anhydrous ethanol as a nonsolvent,nickel nitrate as crystal control agent.The optimal processing conditions of preparing high bulk density spherical NQ determined by single factor method were room temperature,volume ratio of solvent and nonsolvent of 1 ∶ 10;mass fraction of the crystal control agent,spray pressure,bounce frequency and stirring speed were 0.5％,0.6 MPa,40 Hz and 450 r · min-1,respectively;when spray finished,ultrasonic vibration should be continued for another 20 min.The optimal spherical NQ was analyzed by standard container method,scanning electron microscopy(SEM),differential scanning calorimetry(DSC) and X-ray diffraction (XRD).The results show that the prepared NQ is spherical and the bulk density is 1.232 g · cm-3,which is improved by 0.943 g · cm-3 compared with raw material NQ,decomposition temperature determined by DSC is 258.71 ℃,which is improved by 8.03 ℃ compared with that of raw material NQ.关键词
硝基胍(NQ)/球形/喷雾结晶/堆积密度Key words
nitroguanidine(NQ)/spherical/spray crystallization method/bulk density分类
军事科技引用本文复制引用
王晶禹,边红莉,李小东,燕翔..喷雾结晶法制备高堆积密度球形硝基胍[J].含能材料,2017,25(1):53-58,6.基金项目
武器装备预先研究项目(51305120201) （51305120201）
