Superior EMI shielding behavior of multi-layer structure of PVDF based laminated nanocomposite material by controlling the size and distribution of W-type hexaferrite magnetic nanofillers therein

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2024-11-17 DOI:10.1016/j.materresbull.2024.113210

Aliva Saha , Tanmoy Chakraborty , Suman Saha , Subhojit Dutta , Tanmay Kundu , Sayak Mukherjee , Sukhen Das , Soumyaditya Sutradhar

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Abstract

The effects of size and distribution of magnetic filler materials with different loading percentages inside PVDF matrix having mono-layer and multi-layer structures for the modulation of EMI shielding behavior are discussed in the present report. W-type hexaferrites are prepared using the sol-gel method, followed by the manually mortared and ball-milled techniques and embedded inside the PVDF matrix separately. Phase analysis and morphological studies are performed and discussed herein to understand the effect of ball mill technique, over the manually mortared process of W-type hexaferrites. Magnetic and dielectric studies are performed and the influence of the ball mill technique on magnetic and dielectric behavior of nanofillers as well as nanocomposite systems are discussed. Various physical properties of the nanocomposite films are performed within the range of 8-12 GHz. Significant modulations of complex permeability and the complex permittivity with size, distribution and loading percentage of the W-type hexaferrite inside PVDF matrix are found and the effect of impedance matching on EMI shielding behavior are also discussed. EMI shielding behavior of the resultant W-type hexaferrite-PVDF films in the 8-12 GHz frequency region shows the modulations of their absorption and/or reflection effectiveness due to the variation of the size, distribution and loading percentage of magnetic filler materials inside PVDF matrix. Both mono-layer and multi-layer structures of W-type hexaferrite-PVDF films are considered and the effect of thickness on the various parts of EMI shielding behavior is also reported.

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通过控制其中 W 型六价铁氧体磁性纳米填料的尺寸和分布，实现基于 PVDF 的层状纳米复合材料多层结构的优异电磁干扰屏蔽性能

本报告讨论了具有单层和多层结构的 PVDF 基体中不同负载百分比的磁性填料的尺寸和分布对 EMI 屏蔽行为的调节作用。采用溶胶-凝胶法制备了 W 型六氟化碳，然后采用手工砂浆和球磨技术将其分别嵌入 PVDF 基体中。本文进行并讨论了相分析和形态学研究，以了解球磨技术对 W 型六铁氧体手工砂浆工艺的影响。还进行了磁性和介电研究，并讨论了球磨技术对纳米填料和纳米复合材料系统的磁性和介电行为的影响。在 8-12 GHz 范围内对纳米复合薄膜的各种物理特性进行了研究。研究发现，复磁导率和复介电常数随 PVDF 基体中 W 型六亚铁氧体的尺寸、分布和负载百分比而发生显著变化，同时还讨论了阻抗匹配对 EMI 屏蔽行为的影响。由于 PVDF 基体中磁性填充材料的尺寸、分布和装载百分比的变化，所生成的 W 型六铁氧体-PVDF 薄膜在 8-12 GHz 频率区域的 EMI 屏蔽行为显示出其吸收和/或反射效果的变化。研究还考虑了 W 型六氟丙烯-PVDF 薄膜的单层和多层结构，并报告了厚度对 EMI 屏蔽行为各部分的影响。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.