This study aims to fabricate lead-free, flexible gamma ray shielding based on natural rubber (NR) with the original-sized barium sulphate (BaSO₄) and BaSO₄ nanocomposites. The shielding composites were successfully fabricated with various fillers loading of 10, 20, 30 and 50 parts per hundred rubbers (phr). The physical and mechanical properties of the NR composites have been investigated. The gamma ray shielding properties were measured with ⁵⁷Co (122.06 keV) and ¹³³Ba (356.02 keV) sources. Our results indicated that additional filler concentrations into NR increased density, hardness (shore A), tensile modulus, tensile strength, and elongation at break of NR. Tensile properties and elongation at break of NR with BaSO₄ nanoparticles were slightly lower than the ordinary-sized BaSO₄. For the gamma ray shielding properties, the linear attenuation coefficient ($\mathrm{\mu }$) mass attenuation coefficient (${\mu }_m$) were increased with the increasing of fillers concentrations. The half value layer (HVL) was decreased with the increasing of BaSO₄ and BaSO₄ nanoparticles in NR. In comparison of shielding properties between NR with BaSO₄ nanoparticles and the ordinary-sized BaSO₄ showed that the NR with nanocomposites provided better gamma radiation shielding due to the large surface to volume area of nanocomposites. In conclusion, the novel developed shielding based on NR/BaSO₄ nanocomposites showed a promising result for developing potential radiation shielding due to their flexibility, lightweight and lead-free shielding material.

_{本研究旨在用原始尺寸的硫酸钡 (BaSO 4} ) 和 BaSO ₄纳米复合材料制造基于天然橡胶 (NR) 的无铅柔性伽马射线屏蔽。屏蔽复合材料成功地制造了各种填充剂，每百橡胶 (phr) 的填充量分别为 10、20、30 和 50 份。研究了 NR 复合材料的物理和机械性能。伽马射线屏蔽特性是用⁵⁷ Co (122.06 keV) 和¹³³ Ba (356.02 keV) 源测量的。我们的结果表明，在 NR 中添加额外的填料浓度会增加 NR 的密度、硬度（肖氏硬度 A）、拉伸模量、拉伸强度和断裂伸长率。_{BaSO 4} NR的拉伸性能和断裂伸长率_{纳米颗粒比普通尺寸的BaSO 4}略低。对于伽马射线屏蔽特性，线性衰减系数 ($\mathrm{\mu }$) 质量衰减系数 (${\mu }_{米}$) 随着填料浓度的增加而增加。NR中的半值层(HVL)随着BaSO ₄和BaSO _{4纳米粒子的增加而减小。NR与BaSO 4}纳米粒子和普通尺寸BaSO ₄之间的屏蔽性能比较表明，由于纳米复合材料的大表面积与体积面积，具有纳米复合材料的NR提供了更好的伽马辐射屏蔽。总之，基于 NR/BaSO ₄纳米复合材料开发的新型屏蔽由于其柔韧性、重量轻和无铅屏蔽材料，在开发潜在的辐射屏蔽方面显示出有希望的结果。