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Polymers
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Polymer-Based Composites for EMI Shielding
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Polymer-Based Composites for EMI Shielding

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: closed (5 July 2024) | Viewed by 4166

Special Issue Editor

Dr. Lei Wang

E-Mail Website
Guest Editor
School of Chemical & Environmental Science, Shaanxi University of Technology, Hanzhong 723001, China
Interests: MXene nanomaterials; polymer-based EMI shielding composites; multifunctional foams; ultraflexible films; EMI shielding theories
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With the development of communication technology, high-frequency and high-power electronic components are now widely used. However, the electromagnetic pollution of electronic equipment is a threat to the other operating equipment and human health. Electromagnetic interference (EMI) shielding materials can effectively protect electronic equipment and suppress electromagnetic pollution.

Traditional metal-based EMI shielding materials are limited in large-scale commercial applications due to their disadvantages such as having a high density, easily corroding and being difficult to process. Polymer-based composites have gradually become the most promising EMI shielding materials due to their advantages of a high specific strength, easy processing and adjustable performance. Recognizing the importance of research on polymer-based EMI shielding composites, this Special Issue of Polymers invites contributions addressing the design of high-performance polymer-based EMI shielding composites. Any original research work or review article on the preparation or EMI shielding theories of polymer-based EMI shielding composites is welcome. 

Dr. Lei Wang
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • electromagnetic pollution
  • EMI shielding
  • polymer-based composites
  • shielding theories

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Published Papers (2 papers)

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Research

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26 pages, 6939 KiB  
Article
The Impact of Structural Variations and Coating Techniques on the Microwave Properties of Woven Fabrics Coated with PEDOT:PSS Composition
by Vitalija Rubežienė, Sandra Varnaitė-Žuravliova, Audronė Sankauskaitė, Julija Pupeikė, Paulius Ragulis and Aušra Abraitienė
Polymers 2023, 15(21), 4224; https://doi.org/10.3390/polym15214224 - 25 Oct 2023
Cited by 3 | Viewed by 1517
Abstract
Minimizing the impact of electromagnetic radiation (EMR) holds paramount importance in safeguarding individuals who frequently utilize electrical and electronic devices. Electrically conductive textiles, which possess specialized EMR shielding features, present a promising solution to mitigate the risks related to EMR. Furthermore, these textile-based [...] Read more.
Minimizing the impact of electromagnetic radiation (EMR) holds paramount importance in safeguarding individuals who frequently utilize electrical and electronic devices. Electrically conductive textiles, which possess specialized EMR shielding features, present a promising solution to mitigate the risks related to EMR. Furthermore, these textile-based shielding materials could find application as radar-absorbing materials in stealth technology, emphasizing the need for substantial absorption capabilities in shielding mechanisms. In this study, various textile-based materials with an electrically conductive coating that contain the conjugated polymer system poly(3,4-ethylene-dioxythiophene)-polystyrene sulfonate (PEDOT:PSS) were prepared and investigated. The influence of the textile substrate structural parameters, coating deposit, and coating method on their microwave properties—transmission, reflection, and absorption—was investigated. Reflection and transmission measurements were conducted within a frequency range of 2 to 18 GHz. These measurements revealed that, for the tested samples, the shielding properties are determined by the combined effect of reflection and absorption. However, the role of these two parameters varies across the tested frequency range. It was defined that for fabrics coated on one side, better reflection reduction is obtained when the shielding effectiveness (SE) is below |20| dB. It was found that by controlling the coating deposition on the fabric, it is possible to fine-tune the electrical properties to a certain extent, thereby influencing the microwave properties of the coated fabrics. The studies of prepared samples have shown that reflection and transmission parameters depend not only on the type and quantity of conductive paste applied to the fabric but also on the fabric’s construction parameters and the coating technique used. It was found that the denser the substrate used for coating, the more conductive paste solidifies on the surface, forming a thicker coat on the top. For conductive fabrics with the same substrate to achieve a particular SE value using the knife-over-roll coating technology, the required coating deposit amount is considerably lower as compared with the deposit necessary in the case of screen printing: for the knife-over-roll-coated sample to reach SE 15 dB, the required deposit is approximately 14 g/m2; meanwhile, for a sample coated via screen printing, this amount rises to 23 g/m2. Full article
(This article belongs to the Special Issue Polymer-Based Composites for EMI Shielding)
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Review

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24 pages, 7026 KiB  
Review
A Review of the Establishment of Effective Conductive Pathways of Conductive Polymer Composites and Advances in Electromagnetic Shielding
by Xiaotian Nan, Yi Zhang, Jiahao Shen, Ruimiao Liang, Jiayi Wang, Lan Jia, Xiaojiong Yang, Wenwen Yu and Zhiyi Zhang
Polymers 2024, 16(17), 2539; https://doi.org/10.3390/polym16172539 - 7 Sep 2024
Cited by 4 | Viewed by 2057
Abstract
The enhancement of the electromagnetic interference shielding efficiency (EMI SE) for conductive polymer composites (CPCs) has garnered increasing attention. The shielding performance is influenced by conductivity, which is dependent on the establishment of effective conductive pathways. In this review, Schelkunoff’s theory on outlining [...] Read more.
The enhancement of the electromagnetic interference shielding efficiency (EMI SE) for conductive polymer composites (CPCs) has garnered increasing attention. The shielding performance is influenced by conductivity, which is dependent on the establishment of effective conductive pathways. In this review, Schelkunoff’s theory on outlining the mechanism of electromagnetic interference shielding was briefly described. Based on the mechanism, factors that influenced the electrical percolation threshold of CPCs were presented and three main kinds of efficient methods were discussed for establishing conductive pathways. Furthermore, examples were explored that highlighted the critical importance of such conductive pathways in attaining optimal shielding performance. Finally, we outlined the prospects for the future direction for advancing CPCs towards a balance of enhanced EMI SE and cost–performance. Full article
(This article belongs to the Special Issue Polymer-Based Composites for EMI Shielding)
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