Department of Biomedical Engineering, School of Medicine, Keimyung University, 1095 Dalgubel-daero, Daegu, 42601, Korea.
Sci Rep. 2021 Jan 12;11(1):485. doi: 10.1038/s41598-020-79819-5.
Radiation shielding films used in medical institutions are manufactured by mixing polymer materials with eco-friendly shielding materials. However, it is not easy to distribute the shielding material particles uniformly during the process. The uniform distribution of the shielding material particles is key to the reproducibility of the shielding performance of the films. Therefore, in this study, an air pressure mirroring particle dispersion method was developed to maintain a uniform distribution of the shielding material by dispersing the shielding material on a curved reflector through an air nozzle. The particle distribution state, density, and shielding performance of the cross-section and surface of the shielding films developed using the single-sided dispersion, double-dispersion, and air pressure mirroring particle dispersion methods were evaluated. Compared to the conventional single-sided distribution method, the shielding film produced by the air pressure mirroring particle dispersion method increased the particle packing by 41.5%, density by 12.9%, shielding material content by 22.2%, and shielding performance by 21.4%. Thus, the proposed dispersion method enables better shielding performance through uniform dispersion of shielding material, which is the most important parameter in the manufacture of low-dose shielding films.
医疗机构中使用的辐射屏蔽膜是通过将聚合物材料与环保屏蔽材料混合制造而成的。然而，在制造过程中，屏蔽材料颗粒很难均匀分布。屏蔽材料颗粒的均匀分布是膜屏蔽性能重现性的关键。因此，在本研究中，开发了一种气压镜像粒子分散方法，通过空气喷嘴将屏蔽材料分散在弯曲反射器上，从而保持屏蔽材料的均匀分布。评估了使用单侧分散、双分散和气压镜像粒子分散方法开发的屏蔽膜的截面和表面的颗粒分布状态、密度和屏蔽性能。与传统的单侧分布方法相比，气压镜像粒子分散方法生产的屏蔽膜的颗粒堆积增加了 41.5%，密度增加了 12.9%，屏蔽材料含量增加了 22.2%，屏蔽性能提高了 21.4%。因此，通过均匀分散屏蔽材料，所提出的分散方法能够实现更好的屏蔽性能，这是制造低剂量屏蔽膜的最重要参数。
