{"title":"Fabrication of electromagnetic wave absorption nanocomposite foam with adjustable conductive network by supercritical carbon dioxide foaming","authors":"","doi":"10.1016/j.supflu.2024.106395","DOIUrl":null,"url":null,"abstract":"<div><p>Polymer nanocomposite foams with high electromagnetic interference (EMI) shielding performance have become the research hotspot to reduce electromagnetic wave pollution. Herein, we prepared polyethylene/poly (vinylidene fluoride)/carbon nanotubes/Fe<sub>3</sub>O<sub>4</sub>(PE/PVDF/Fe<sub>3</sub>O<sub>4</sub>/CNTs) nanocomposites and nanocomposite foams by following the simple melt blending and batch foaming procedures. The co-continuous structure system of PVDF/PE was achieved by altering the matrix ratio of PVDF/PE, while reaching a maximum average EMI shielding efficiency of ca. 28 dB for the nanocomposite with PVDF/PE ratio of 5:5. Furthermore, the largest specific EMI SE of as high as 275 dB‧cm<sup>2</sup>‧g<sup>−1</sup> was obtained for the nanocomposite foam with PVDF/PE ratio of 9: 1, in which the EMI shielding mechanism is mainly based on absorption, leading to a significantly reduction in the secondary EM wave pollution. Therefore, the preparation of porous polymer nanocomposite foams with excellent EM wave absorption performance served as a novel strategy to reduce secondary EM wave pollution that holds great potential for applications in both military and civilian fields.</p></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":null,"pages":null},"PeriodicalIF":3.4000,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0896844624002304/pdfft?md5=489bf1582d5d55b5498823c3484be72b&pid=1-s2.0-S0896844624002304-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Supercritical Fluids","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0896844624002304","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Polymer nanocomposite foams with high electromagnetic interference (EMI) shielding performance have become the research hotspot to reduce electromagnetic wave pollution. Herein, we prepared polyethylene/poly (vinylidene fluoride)/carbon nanotubes/Fe3O4(PE/PVDF/Fe3O4/CNTs) nanocomposites and nanocomposite foams by following the simple melt blending and batch foaming procedures. The co-continuous structure system of PVDF/PE was achieved by altering the matrix ratio of PVDF/PE, while reaching a maximum average EMI shielding efficiency of ca. 28 dB for the nanocomposite with PVDF/PE ratio of 5:5. Furthermore, the largest specific EMI SE of as high as 275 dB‧cm2‧g−1 was obtained for the nanocomposite foam with PVDF/PE ratio of 9: 1, in which the EMI shielding mechanism is mainly based on absorption, leading to a significantly reduction in the secondary EM wave pollution. Therefore, the preparation of porous polymer nanocomposite foams with excellent EM wave absorption performance served as a novel strategy to reduce secondary EM wave pollution that holds great potential for applications in both military and civilian fields.
期刊介绍:
The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics.
Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.