基于微流控装置制备聚丙烯腈靶用微胶囊

对惯性约束聚变靶用聚合物微胶囊的制备方法进行了研究,设计了一种基于双T型结构的微通道乳化装置,用于制备稳定的双重乳液。使用玻璃毛细管作为中间相溶液的微通道,可以提高三相流速的调节范围,从而加大乳液尺寸分布范围。三相溶液密度差异小,因此乳液的同心度可以逐渐自发调整。通过调节不同的固化转速,发现在55 r/min下微球的同心度达到最佳,超过98.7%。使用扫描电镜对靶丸进行形貌和X射线能量色散谱分析表明,超临界干燥方法可以同时满足去除内部溶剂和保持靶丸结构不受破坏的要求。最终成功制得了粒径300～1000 m、壁厚20～300 m的聚丙烯腈空心微胶囊。     

Crystal and Molecular Structure of 4-Hydroxy-3-Methoxy-4-N-Methylstilbazonium Iodide C15H16NO2+·I-

The crystal structure of the title compound C15H16NO2+ · I-(Mr=369. 19) has been determined by single crystal X-ray diffraction analysis. The crystal belongs to tbe monoclinic system with space group P21/c, a=8. 957(1), b=21. 8117(2), c=7. 8760(10)A , β=103.94(1)°, V=1493.8(3)A3, Z=4, Dc=1. 642g cm3,μ=2. 141mm-1, F(000)=728, final R=0. 0264, and Rw=0. 0644(I＞2σ(I)) for 2938 independent reflections. The results show that in the crystal structure of the title compound the planar cations have two configurations, and these cations are anti-parallelly packed through the strong π…π interaction.     

Molecular and Crystal Structure of 1- ( 2- chloro) - Benzoyl - 3- (4- methylphenyl ) Thiourea

1　INTRODUCTIONBenzoylphenyltioureas having a generalformula( ) were reported to have in secticidalactivity〔1〕,which isclosely related to theirstructures,particularly tothedi hedralangle between the- CONH- plane and phenylring〔2〕.Surprisingly there islittle reported in the literature,only three related structures stored in CSD〔3〕 until1 998.In thispaper,we reportthe crystalstructure ofthe title compound.R CONHCSNHR2　EXPERIMENTAL2 .1　Synthesis　　The synthesisofthetitl…