纳米结构 ZrO₂/MWCNT 杂化材料：制备、表征及其在电磁污染屏蔽中的应用。

Nanostructured ZrO₂/MWCNT Hybrid Materials: Fabrication, Characterization and Applications in Shielding of Electromagnetic Pollution.

机构信息

Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.

School of Energy Science and Engineering, Indian Institute of Technology, Kharagpur 721302, India.

出版信息

J Nanosci Nanotechnol. 2019 Jun 1;19(6):3367-3375. doi: 10.1166/jnn.2019.15417.

DOI:10.1166/jnn.2019.15417

PMID:30744764

Abstract

ZrO₂/MWCNT nanocomposites have been prepared by simple refluxing method and characterized by X-ray diffraction (XRD). Fourier-transform infrared spectroscopy (FTIR), and Raman analysis suggests chemical interactions present between zirconia and Multiwalled carbon nanotube (MWCNT) in the as prepared nanocomposites. Electromagnetic inteference shielding efficiencies (EMI SE) for the nanocomposites were found to increase with increasing amount of MWCNT loading. Highest EMI SE value of 29.1-30.5 dB was obtained for nanocomposite containing 15 wt% loading of MWCNT in the microwave frequency range of 2-8 GHz. This optimum performance is due to several factors like highest percentage of intermolecular H-bonding, highly defective, interconnected network structure, high conductivity and dielectric permittivities of the nanocomposites.

摘要

ZrO₂/MWCNT 纳米复合材料通过简单的回流法制备，并通过 X 射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和拉曼分析进行了表征。结果表明，在制备的纳米复合材料中，氧化锆和多壁碳纳米管（MWCNT）之间存在化学相互作用。纳米复合材料的电磁干扰屏蔽效率（EMI SE）随着 MWCNT 负载量的增加而增加。在 2-8GHz 的微波频率范围内，含有 15wt%MWCNT 负载量的纳米复合材料的 EMI SE 值最高可达 29.1-30.5dB。这种最佳性能归因于多种因素，如最高比例的分子间氢键、高度缺陷、相互连接的网络结构、纳米复合材料的高电导率和介电常数。