Gamma radiation as a novel approach to synthesize core-shell magnetic polymer nanocomposite (PAAc/Fe₃O₄) particles was investigated. The Fe₃O₄ nanoparticles were primarily prepared by in situ precipitation–oxidation and radiation polymerization of polyacrylic acid PAAc. The polymerization process was carried out by dissolving two salts of Fe^2+/3+ sulfates into a 20% solution of PAAc followed by exposing them to gamma radiation at a dose of 30 kGy. Subsequently, an appropriate amount of ammonium (NH₄OH) solution was added to the PAAc/Fe^2+/3+ polymer solution, yielding a black precipitate of PAAc/Fe₃O₄. Transmission electron microscopy revealed that the in situ polymerization of core-shell magnetic polymer nanocomposites resulted in sphere-like particles of PAAc/Fe₃O₄ with diameters of 30 nm. Hysteresis loops indicated that these particles are ferromagnetic in nature.

研究了γ辐射作为合成核-壳磁性聚合物纳米复合材料（PAAc / Fe ₃ O ₄）颗粒的一种新方法。Fe ₃ O ₄纳米粒子主要通过原位沉淀-氧化和聚丙烯酸PAAc的辐射聚合制备。通过将两种Fe ^{2 + / 3 +}硫酸盐溶解在20％的PAAc溶液中，然后将其暴露于30 kGy的伽马射线辐射中来进行聚合过程。随后，将适量的铵（NH ₄ OH）溶液添加到PAAc / Fe ^{2 + / 3 +}聚合物溶液中，得到PAAc / Fe ₃ O的黑色沉淀物₄。透射电子显微镜显示，核-壳磁性聚合物纳米复合材料的原位聚合产生直径为30 nm的球形PAAc / Fe ₃ O ₄颗粒。磁滞回线表明这些粒子本质上是铁磁性的。