FOX-7在DMF/H2O二元体系中的冷却结晶动力学  

Cooling Crystallization Kinetics of FOX-7 in DMF/H2O Binary System

作　　者：刘立媛 张萌 赵鑫华 陈丽珍 王建龙 周诚[2] LIU Li-yuan;ZHANG Meng;ZHAO Xin-hua;CHEN Li-zhen;WANG Jian-long;ZHOU Cheng(School of Chemical Engineering and Technology,North University of China,Taiyuan 030051,China;Xi′an Modern Chemistry Research Institute,Xi′an 710065,China)

机构地区：[1]中北大学化学工程与技术学院,山西太原030051 [2]西安近代化学研究所,陕西西安710065

出　　处：《含能材料》2020年第3期215-222,共8页Chinese Journal of Energetic Materials

摘　　要：为解决直接合成所得1,1-二氨基-2,2-二硝基乙烯(FOX-7)存在的晶体形貌不规则,粒度分布不均匀等问题,采用激光动态法和间歇动态法分别测定了FOX-7在N,N-二甲基甲酰胺(DMF)与水(H2O)二元体系(V(DMF)∶V(H2O)=7∶3)中的溶解度和超溶解度及冷却结晶动力学数据,利用最小二乘法拟合得到了晶体成核速率与生长速率方程。结果表明,FOX-7在上述体系中溶解度方程为lnx=16.42-5019.51/T-0.45lnT;在冷却结晶过程中呈粒度无关生长模型;在成核速率与生长速率方程中,过饱和比S的指数分别为0.61与0.45,悬浮密度MT指数的为2.30,搅拌强度ωr的指数为0.22。In order to solve the problems of irregular crystal morphology and uneven particle size distribution of 1,1-diamino-2,2-dinitroethylene(FOX-7)obtained by direct synthesis.Solubility,supersolubility and cooling crystallization kinetics of FOX-7 in V(N,N-dimethylformamide)∶V(water)=7∶3 binary system were determined by laser dynamic method and intermittent dynamic method respectively.Results show that the solubility equation of FOX-7 in the above system is lnx=16.42-5019.51/T-0.45lnT.There is a granularity-independent growth model during cooling crystallization.In the nucleation rate and growth rate equation,the supersaturation ratio S index are respectively 0.61 and 0.45,the suspension density MT index is 2.30,and the stirring strengthωr index is 0.22.

关 键 词：1 1-二氨基-2 2-二硝基乙烯(FOX-7) 粒度分布 最小二乘法 冷却结晶动力学 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]