核壳结构Fricke凝胶剂量计小球的制备及扩散限制的研究

Preparation and research of diffusion limitation of Fricke gel dosimeter pellets with core-shell structure

设计制备了一种具有物理扩散限制层结构的核壳结构小球,将存在扩散的Fricke凝胶剂量计包裹在聚二甲基硅氧烷壳层内,最大限度解决Fe3+的扩散问题。制备过程简单,利用双微流控通道制备核壳小球,实验可重复性好,制备的小球大小形貌良好,小球平均直径约为2.90 mm,壁厚为0.22 mm,有限元模拟结果研究表明此核壳结构可应用于剂量验证。

A core-shell structured pellet with a physical diffusion-limited layer structure was designed and prepared.A diffused Fricke gel dosimeter was wrapped in a polydimethylsiloxane shell to maximally address the Fe3+diffusion problem.The preparation process was simple.The core-shell pellets were prepared by using dual microfluidic channels.The experiment is reproducible.The prepared pellets were of an appropriate size and had good morphology.The average diameter of the pellets was approximately 2.90 mm,and the wall thickness was 0.22 mm.The finite-element simulation results of this study demonstrated that this core-shell structure can be used for dose verification.