ADN的溶解度、结晶介稳区及诱导期的测定  

Measurement of Solubility,Metastable Zone and Induction Period of ADN

作　　者：刘欣玉 孙杰 罗义芬[2] 王灵宇 龚俊波[1] 董伟兵[1,3] LIU Xin-yu;SUN Jie;LUO Yi-fen;WANG Ling-yu;GONG Jun-bo;DONG Wei-bing(State Key Laboratory of Chemical Engineering,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;Xi′an Modern Chemistry Research Institute,Xi′an 710065,China;School of Chemistry and Chemical Engineering,Qinghai Nationalities University,Xining 810007,China)

机构地区：[1]天津大学化工学院化学工程联合国家重点实验室,天津300072 [2]西安近代化学研究所,陕西西安710065 [3]青海民族大学化学化工学院,青海西宁810007

出　　处：《含能材料》2019年第9期766-772,共7页Chinese Journal of Energetic Materials

基　　金：国家科技重大专项（2017ZX07402003）;国家自然科学基金创新研究群体项目(21621004)

摘　　要：溶解度、介稳区宽度及诱导期是二硝酰胺铵(ADN)结晶过程中的重要参数。采用动态法测定了ADN在正丁醇、异丙醇、水和异丙醇混合溶剂(体积比为1∶10和1∶6)中的溶解度,并分别采用Apelblat方程和λh方程对溶解度数据进行了拟合。研究了搅拌速度、降温速率对ADN在正丁醇、异丙醇中介稳区宽度以及不同过饱和度对诱导期的影响。结果显示,Apelblat方程和λh方程都能对ADN溶解度很好地拟合;结晶介稳区的宽度随降温速率的降低、搅拌速度的增加而变窄;随着过饱和度的增大,结晶诱导期变短。应用自洽Nyvlt型方程和3D成核理论,结合实验介稳区宽度与诱导期数据,计算的成核级数m约为4,ADN在正丁醇和异丙醇中的固-液界面张力分别为0.235,0.191 mJ·m^-2(均相成核),0.070,0.067 mJ·m^-2(非均相成核)。Solubility,metastable zone width and induction period are important parameters in the crystallization process of am-monium dinitramide(ADN). The solubilities of ADN in n-butanol,isopropanol and mixed solvent of water and isopropanol(volume ratio as 1∶10 and 1∶6)were measured by dynamic method and the solubility data were fitted by Apelblat equation and λh equation,respectively. The effects of stirring speed and cooling rate on the metastable zone width of ADN in n-butanol and isopropanol and the effects of different supersaturation on the induction period were investigated,respectively. Results show that the Apelblat equation and the λh equation can well fit the solubility of ADN. With the decrease of the cooling rate and the increase of the stirring speed,the width of the crystalline metastable zone narrows. The crystallization induction period shortens with the increase of supersaturation. Using the self-consistent Nyvlt equation and 3D nucleation theory,combined with the metastable zone width and induction period data,the nucleation order m is calculated to be about 4,and the solid-liquid interfacial tension of ADN in n-butanol and isopropanol are 0.235 mJ·m^-2 and 0.191 mJ·m^-2 for homogeneous nucleation,0.070 mJ·m^-2 and 0.067 mJ·m^-2 for heterogeneous nucleation,respectively.

关 键 词：二硝酰胺铵(ADN) 溶解度 介稳区宽度 诱导期 

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]