ABSTRACT Copper nanoparticles via chemical reduction of copper sulfate by sodium borohydride in the presence of sodium oleate stabilizing agent have been synthesized and stabilized. X-ray phase analysis has shown that the synthesized nanoparticles in the core consist of metal nanoparticles and the surface is covered with a shell of copper oxide. SEM analysis of nanoparticles stabilized in the presence of sodium oleate showed that copper nanoparticles, coated with the shell of copper oxide, have a narrow particle size range of 14–25 nm. Polymer nanocomposites based on PP/Cu-CuO were obtained by the combining of ex-situ casting solution and hot pressing methods. The structure and electrophysical properties of polymer nanocomposites were investigated. Have been established that at lower concentrations, nanoparticles play the role of structurant, as a result the new polar groups and stable charge-trappings are created in the obtained nanocomposites, which in turn increases the value of dielectric permittivity of nanocomposites and enhances the polarizability of these materials.

中文翻译：

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聚丙烯基质中的铜和氧化铜纳米粒子：合成、表征和介电特性

摘要 在油酸钠稳定剂的存在下，通过硼氢化钠对硫酸铜的化学还原，合成并稳定了铜纳米颗粒。X 射线相分析表明，核中合成的纳米粒子由金属纳米粒子组成，表面覆盖有氧化铜壳。在油酸钠存在下稳定的纳米粒子的 SEM 分析表明，包覆有氧化铜壳的铜纳米粒子具有 14-25 nm 的窄粒径范围。通过异位浇铸溶液和热压方法相结合，获得了基于 PP/Cu-CuO 的聚合物纳米复合材料。研究了聚合物纳米复合材料的结构和电物理性能。已经确定，在较低浓度下，纳米颗粒起到结构剂的作用，