Manganese–cobalt ferrite and polyaniline core–shell nanocomposite as an efficient shielding material against electromagnetic interference under X-band frequency

IF 3.1 3区化学 Q2 POLYMER SCIENCE

Polymer Bulletin Pub Date : 2024-12-05 DOI:10.1007/s00289-024-05599-x

Chandra Shekhar Joshi, R. C. Srivastava, Amit Joshi, Harendra Kumar Verma

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Abstract

Manganese–cobalt ferrite and polyaniline (MCF@PANI) core–shell nanocomposites with varying weight percentage of MCF (10, 20 and 50) were synthesized through chemical oxidative in situ polymerization of aniline in the presence of MCF NPs. Law of approach method was used to analyze saturation magnetization and anisotropy constant for synthesized nanocomposites. Saturation magnetization was found to be increased with increasing weight percentage of MCF NPs in core–shell nanocomposites. The shielding effectiveness (SE) of core–shell nanocomposites showed strong dependency on MCF NP concentration in PANI matrix. Maximum SE through reflection and absorption as well as total SE was shown by PANI@MCF50% core–shell nanocomposite for the sample thickness of 3 mm. The in situ polymerization of aniline-coated MCF NPs leads to enhanced interfacial polarization and contributes to higher microwave absorption. The PANI@MCF50% core–shell nanocomposite showed excellent SE (45%) in the X-band frequencies. The overall electromagnetic interference shielding effectiveness in the core–shell composites was found to be absorption dominant. Hence, these core–shell composite materials are potential candidate for EMI shielding applications in X-band frequencies because of their low cost, improved conductivity, better thermal stability, light weight and excellent EMI SE.

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锰钴铁氧体和聚苯胺核壳纳米复合材料在x波段有效屏蔽电磁干扰

在MCF纳米粒子的存在下，通过苯胺的原位化学氧化聚合，合成了不同重量百分比MCF（10,20和50）的锰钴铁氧体和聚苯胺（MCF@PANI）核壳复合材料。采用逼近法对合成的纳米复合材料的饱和磁化强度和各向异性常数进行了分析。饱和磁化强度随着MCF纳米粒子在核-壳纳米复合材料中的重量百分比的增加而增加。核壳纳米复合材料的屏蔽效能（SE）与聚苯胺基体中MCF NP的浓度密切相关。当样品厚度为3 mm时，PANI@MCF50%的核壳复合材料通过反射和吸收获得的最大SE和总SE。苯胺包被的MCF NPs的原位聚合导致界面极化增强，有助于提高微波吸收。PANI@MCF50%的核壳复合材料在x波段的SE值为45%。核壳复合材料的整体电磁干扰屏蔽效果以吸收为主。因此，这些核壳复合材料是x波段电磁干扰屏蔽应用的潜在候选者，因为它们成本低，电导率提高，热稳定性更好，重量轻，具有优异的电磁干扰SE。图形抽象

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来源期刊

Polymer Bulletin 化学-高分子科学

CiteScore

6.00

自引率

6.20%

发文量

审稿时长

5.5 months

期刊介绍： "Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad. "Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."