{"title":"微孔碳纳米管/热塑性弹性体纳米复合泡沫可提高吸收驱动型电磁屏蔽效率","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":"{\"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}","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
摘要
电子设备的日益普及导致了严重的电磁污染,给通信系统和人类健康带来了风险。此外,电子元件微型化的趋势使有效散热变得更加复杂,从而导致过热和性能下降。为解决这些问题,我们采用熔融和溶液混合技术,开发了一种由乙烯-辛烯共聚物(EOC)和多壁碳纳米管(MWCNTs)组成的微孔纳米复合泡沫。使用化学发泡剂在纳米复合材料中引入多孔结构,形成密度范围为 0.4-0.53 g/cm3 的泡沫,并且在 4 wt % 时具有较低的渗流阈值。这种多孔复合材料在 2 mm 厚、10 wt % MWCNT 负载的纳米复合材料中,在 X 波段频率内表现出 25.5 dB 的出色电磁干扰(EMI)屏蔽效果。此外,复合泡沫的导热系数为 0.25 Wm-1K-1,有利于吸热。这些特性使 EOC/MWCNT 纳米复合泡沫非常适合用于密封和包装应用中的电磁干扰屏蔽。这种材料的特性表明,它在航空航天技术、军事行动、智能可穿戴技术和便携式电子设备等领域的各种应用中具有巨大的潜力。
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.