{"title":"Microcellular Carbon Nanotube/Thermoplastic Elastomer Nanocomposite Foam to Amplify Absorption-Driven Electromagnetic Shielding Efficiency","authors":"Jasomati Nayak, Palash Das, Aparajita Pal, Ankur Katheria and Narayan Ch. Das*, ","doi":"10.1021/acsapm.4c0214810.1021/acsapm.4c02148","DOIUrl":null,"url":null,"abstract":"<p >The increasing proliferation of electronic devices has led to significant electromagnetic pollution, posing risks to communication systems and human health. Moreover, the trend toward miniaturizing electronic components complicates effective heat dissipation, leading to overheating and degraded performance. To address these issues, a microcellular nanocomposite foam composed of ethylene–octene copolymer (EOC) and multiwall carbon nanotubes (MWCNTs) was developed by using a blend of melt and solution mixing techniques. A chemical blowing agent was employed to introduce porous structures into the nanocomposite, resulting in a foam with a density range of 0.4–0.53 g/cm<sup>3</sup> and a low percolation threshold at 4 wt %. This porous composite demonstrated an outstanding electromagnetic interference (EMI) shielding effectiveness of 25.5 dB in a 2 mm thick, 10 wt % MWCNT-loaded nanocomposite within the X-band frequency. Additionally, the composite foam exhibited a thermal conductivity of 0.25 Wm<sup>–1</sup>K<sup>–1</sup>, facilitating heat absorption. These properties make the EOC/MWCNT nanocomposite foam highly suitable for EMI shielding in sealing and packaging applications. The material’s attributes suggest substantial potential for diverse applications in aerospace technology, military operations, smart-wearable technology, and portable electronic devices.</p>","PeriodicalId":7,"journal":{"name":"ACS Applied Polymer Materials","volume":null,"pages":null},"PeriodicalIF":4.4000,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Polymer Materials","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsapm.4c02148","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The increasing proliferation of electronic devices has led to significant electromagnetic pollution, posing risks to communication systems and human health. Moreover, the trend toward miniaturizing electronic components complicates effective heat dissipation, leading to overheating and degraded performance. To address these issues, a microcellular nanocomposite foam composed of ethylene–octene copolymer (EOC) and multiwall carbon nanotubes (MWCNTs) was developed by using a blend of melt and solution mixing techniques. A chemical blowing agent was employed to introduce porous structures into the nanocomposite, resulting in a foam with a density range of 0.4–0.53 g/cm3 and a low percolation threshold at 4 wt %. This porous composite demonstrated an outstanding electromagnetic interference (EMI) shielding effectiveness of 25.5 dB in a 2 mm thick, 10 wt % MWCNT-loaded nanocomposite within the X-band frequency. Additionally, the composite foam exhibited a thermal conductivity of 0.25 Wm–1K–1, facilitating heat absorption. These properties make the EOC/MWCNT nanocomposite foam highly suitable for EMI shielding in sealing and packaging applications. The material’s attributes suggest substantial potential for diverse applications in aerospace technology, military operations, smart-wearable technology, and portable electronic devices.
期刊介绍:
ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers.
The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.