臭氧改性及搅拌桨结构对大直径双层球制备的影响  

Effects of surface modification by ozonization and structures of impeller on fabricating large-size double-layer hollow microsheres

作　　者：苏琳[1] 李婧[1] 李洁[1] 刘梅芳[1] 陈素芬[1] 王丽莉[2] 张占文[1] 李波[1] 刘一杨[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]中国工程物理研究院计算机应用研究所,四川绵阳621900

出　　处：《强激光与粒子束》2013年第12期3269-3273,共5页High Power Laser and Particle Beams

基　　金：中国工程物理研究院科学技术发展基金项目(2010A0302015)

摘　　要：随着高功率激光器的飞速发展，ICF物理实验对聚苯乙烯（PS）聚乙烯醇（PVA）双层空心微球的规格要求逐渐提高，A径要求将达到700～900μm。针对该直径范嗣的PS—PVA双层空心微球，通过采用PS球臭氧化表面改性技术和搅拌桨叶轮结构优化技术，对传统乳液微封装法制备双层夺心微球工艺进行了改进．臭氧化表面改忡后PS同体核心发生憎水一亲水转变，提高了PS与PVA之间的作用强度；搅拌桨叶轮结构优化，改善了体系容器内溶液流场均勺性，使得微球在整个体系中的运动相对平稳，从而初步制得了直径范嗣和700～900μl的双层空心微球。With the rapid progress of high power laser technology in China, the specifications on the diameters of PS-PVA double-layer hollow microspheres used in inertial confinement fusion （ICF） physical experiments have increased to 700 μm-900 μm. In order to improve the yield of the double-layer hollow microspheres with 700 μm-900 μm diameter, both the surface mod- ification on the PS microspheres by ozonizing and the optimization on the structure of impeller for stirring paddle were used to im- prove the traditional emulsion mieroeneapsulation technique. The hydrophobic surface of the PS microsphere showed hydrophilic properties after the ozonization modification, which enhanced the interaction between PS microspheres and PVA coatings. Moreo- ver, the optimization on the structure of impeller for stirring paddle improved the uniformity of the liquid field in the container, resulting in the movement stability of the microspheres. The above modifications benefited improving the yield of the large-diame- ter double-layer hollow microspheres.

关 键 词：惯性约束聚变 大直径双层空心塑料微球 乳液微封装法 表面改性 PS—PVA双重乳粒 

分 类 号：TL639.11[核科学技术—核技术及应用]