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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,直径要求将达到700~900μm。针对该直径范围的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空心微球工艺进行了改进,臭氧化表面改性后PS固体核心发生憎水-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匀性,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围在700~900μm的双层空心微球。
With the rapid development of high-power lasers, ICF physical experiments gradually increase the specifications of polystyrene (PS) -polyvinyl alcohol (PVA) double-layer hollow microspheres, and the diameter requirements will reach 700-900μm. The PS-PVA double-layered hollow microspheres with this diameter range were modified by PS ball-ozonation surface-modification technology and impeller impeller structure optimization technology to improve the technology of double-layer hollow microspheres prepared by traditional microemulsion encapsulation method. Ozone Hydrophobic-hydrophilic transition occurred in PS solid core after surface modification, and the strength of interaction between PS and PVA was improved. The impeller structure of impeller was optimized to improve the uniformity of solution flow field in the system container, In the relatively stable movement, which initially made a diameter range of 700 ~ 900μm double hollow microspheres.