文献类型：期刊文献

中文题名：超临界CO_2法制备超细HMX颗粒

英文题名：Preparation of HMX Ultrafine Particles by Supercritical CO_2 Method

作者：高振明[1];蔡建国[1];龙宝玉[1];樊镇荧[1]

机构：[1]华东理工大学化学工程研究所产品工程系,上海200237

年份：2008

卷号：31

期号：4

起止页码：22

中文期刊名：火炸药学报

外文期刊名：Chinese Journal of Explosives & Propellants

收录：CSTPCD;;Scopus;CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：物理化学;超临界CO2;超细颗粒;HMX;粒度分布

外文关键词：physical chemistry; supercritical CO2 ;uhrafine particle ; HMX; particle size distribution

摘要：考察了预膨胀压力、HMX丙酮溶液初始浓度、取样停留时间及其他因素对制备HMX超细微粒粒度和晶体性质的影响。制备的超细HMX微粒平均粒径在350nm以下,一部分微粒粒度小于100nm。结果表明,预膨胀压力对HMX颗粒尺寸的影响较大,压力增加,HMX平均粒度变小,粒度分布变窄;HMX丙酮溶液初始浓度对HMX的粒度和粒度分布有很大影响,初始浓度越小平均粒径就变小,粒度分布变窄。停留时间及喷嘴尺寸对颗粒粒度、粒度分布及其形貌都有不同程度的影响。
The effect of pre-expansion pressure, concentration of HMX in acetone, sample residence time and other factors on ultrafine particles and crystal properties of HMX was studied. The results show that the mean particle size（MPS） of HMX obtained by SC-CO2 is not bigger than 350nm and some of the HMX particles is less than 100 nm. With increasing the pressure, the MPS decrease and HMX particles size distribution（PSD） narrow. The initial feed concentration of HMX in acetone solution affects the MPS and PSD of HMX. The lower the initial concentration contributes to the smaller crystals and narrower PSD of HMX. The residence time and nozzle diameter to some extent respectively impact the crystal size and morphology of HMX.