Studies on Metal Oxide Nanoparticle Doped PVP Polymer Nanocomposites

Research Anthology on Synthesis, Characterization, and Applications of Nanomaterials Pub Date : 1900-01-01 DOI:10.4018/978-1-7998-8591-7.ch047

Madhu B. J.

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Abstract

Magnesium Oxide (MgO) nanoparticles have been synthesized by solution combustion technique using stoichiometric composition of magnesium nitrate as oxidizer and urea as fuel. Structure of the MgO was studied with the X-ray diffraction (XRD) using Cu-Kα radiation. MgO/polyvinylpyrrolidone (PVP) nanocomposites have been prepared by blending MgO nanoparticles with the polyvinylpyrrolidone. MgO/PVP nanocomposites were characterized by Fourier transform infrared (FTIR) spectroscopy. Frequency dependence of dielectric constant (ε′), dielectric loss tangent (tanδ) and AC conductivity studies have been undertaken on the MgO/PVP nanocomposites in the frequency range 50Hz-5MHz at room temperature. Dielectric properties such as dielectric constant (ε′) and dielectric loss tangent (tanδ) are found to decrease with the increase in the frequency. Further, AC conductivity of MgO/PVP nanocomposites was found to increase with an increase in the frequency. Observed variation in the a. c. conductivity with the frequency has been understood on the basis of electron hopping model.

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金属氧化物纳米颗粒掺杂PVP聚合物纳米复合材料的研究

以硝酸镁为氧化剂，尿素为燃料，采用溶液燃烧法制备了氧化镁纳米颗粒。用cu - k - α辐射x射线衍射(XRD)研究了MgO的结构。将MgO纳米粒子与聚乙烯吡咯烷酮共混制备了MgO/聚乙烯吡咯烷酮(PVP)纳米复合材料。采用傅里叶变换红外光谱(FTIR)对MgO/PVP纳米复合材料进行了表征。在室温条件下，对MgO/PVP纳米复合材料在50Hz-5MHz频率范围内的介电常数(ε′)、介电损耗正切(tanδ)和交流电导率进行了频率依赖性研究。随着频率的增加，介电常数(ε′)和介电损耗正切(tanδ)等介电性能均有所降低。此外，MgO/PVP纳米复合材料的交流电导率随频率的增加而增加。在电子跳变模型的基础上，已经理解了所观察到的交流电导率随频率的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Research Anthology on Synthesis, Characterization, and Applications of Nanomaterials

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