Abstract Nanocomposites consisting of polyvinyl alcohol embedded with nanoparticles of Zn0.80Co0.1Ni0.1Fe2O4 and ZnFe2O4 were successfully synthesized by employing a facile two-steps process. The nanoparticles of Zn0.80Co0.1Ni0.1Fe2O4 and ZnFe2O4 were synthesized via a micro emulsion procedure and then embedded into a polyvinyl alcohol matrix by an ultrasound-assisted in-situ emulsion. The result showed that the prepared nanoparticles of Zn0.80Co0.1Ni0.1Fe2O4 & ZnFe2O4 diffuse homogeneously in a polyvinyl alcohol matrix, maintaining the particle shape and size of the Zn0.80Co0.1Ni0.1Fe2O4 nanoparticles. Transmission electron microscope images revealed that polyvinyl alcohol chains have encircled the Zn0.80Co0.1Ni0.1Fe2O4 & ZnFe2O4 nanoparticles. The interaction between the polyvinyl alcohol and the nanoparticles in the prepared nanocomposites was confirmed by Fourier-transform infrared spectroscopy via the shifting of bands revealed from the Fourier-transform infrared spectra. Dielectric studies explained the decreasing trend by varying concentrations of nanoparticles with a constant polymer concentration. The dielectric constant and dielectric loss both revealed a decreasing trend by varying the concentration of the nanoparticles with a constant polymer concentration. This occurred due to the grain boundary effect which becomes dominant at low frequencies. The Transmission electron microscope images result shows that polycrystalline Zn0.80Co0.1Ni0.1Fe2O4 & ZnFe2O4 nanoparticles with an average size of 10–15 nm were incorporated with PVA to form nanocomposites.

中文翻译：

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超声辅助乳化液相合成Zn0.8Co0.1Ni0.1Fe2O4聚乙烯醇纳米复合材料

摘要 通过简单的两步法成功地合成了由嵌入有纳米颗粒 Zn0.80Co0.1Ni0.1Fe2O4 和 ZnFe2O4 的聚乙烯醇组成的纳米复合材料。Zn0.80Co0.1Ni0.1Fe2O4 和 ZnFe2O4 纳米粒子通过微乳液法合成，然后通过超声辅助原位乳液嵌入聚乙烯醇基质中。结果表明，制备的 Zn0.80Co0.1Ni0.1Fe2O4 和 ZnFe2O4 纳米颗粒在聚乙烯醇基体中均匀扩散，保持了 Zn0.80Co0.1Ni0.1Fe2O4 纳米颗粒的颗粒形状和尺寸。透射电子显微镜图像显示，聚乙烯醇链包围了 Zn0.80Co0.1Ni0.1Fe2O4 和 ZnFe2O4 纳米颗粒。聚乙烯醇与制备的纳米复合材料中纳米颗粒之间的相互作用通过傅里叶变换红外光谱通过傅里叶变换红外光谱显示的谱带移动得到证实。介电研究通过在聚合物浓度恒定的情况下改变纳米粒子的浓度来解释下降趋势。通过在聚合物浓度恒定的情况下改变纳米粒子的浓度，介电常数和介电损耗都显示出降低的趋势。这是由于晶界效应在低频时占主导地位而发生的。透射电子显微镜图像结果表明，平均尺寸为 10-15 nm 的多晶 Zn0.80Co0.1Ni0.1Fe2O4 和 ZnFe2O4 纳米颗粒与 PVA 结合形成纳米复合材料。