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采用层状结构提高 MWCNT-PMMA 复合材料的电磁干扰屏蔽性能。

Improved Electromagnetic Interference Shielding Properties of MWCNT-PMMA Composites Using Layered Structures.

机构信息

Carbon Technology Unit, Division of Engineering Materials, National Physical Laboratory, Dr, K,S, Krishnan Marg, New Delhi, 110012, India.

出版信息

Nanoscale Res Lett. 2009 Jan 17;4(4):327-34. doi: 10.1007/s11671-008-9246-x.

DOI:10.1007/s11671-008-9246-x
PMID:20596500
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2893718/
Abstract

Electromagnetic interference (EMI) shielding effectiveness (SE) of multi-walled carbon nanotubes-polymethyl methacrylate (MWCNT-PMMA) composites prepared by two different techniques was measured. EMI SE up to 40 dB in the frequency range 8.2-12.4 GHz (X-band) was achieved by stacking seven layers of 0.3-mm thick MWCNT-PMMA composite films compared with 30 dB achieved by stacking two layers of 1.1-mm thick MWCNT-PMMA bulk composite. The characteristic EMI SE graphs of the composites and the mechanism of shielding have been discussed. SE in this frequency range is found to be dominated by absorption. The mechanical properties (tensile, flexural strength and modulus) of the composites were found to be comparable or better than the pure polymer. The studies therefore show that the composite can be used as structurally strong EMI shielding material.

摘要

采用两种不同技术制备的多壁碳纳米管-聚甲基丙烯酸甲酯（MWCNT-PMMA）复合材料的电磁干扰（EMI）屏蔽效能（SE）进行了测量。与堆叠两层 1.1-mm 厚 MWCNT-PMMA 块状复合材料实现的 30dB EMI SE 相比，通过堆叠 7 层 0.3-mm 厚的 MWCNT-PMMA 复合薄膜，可实现高达 40dB 的在 8.2-12.4GHz（X 波段）频率范围内的 EMI SE。讨论了复合材料的特征 EMI SE 图和屏蔽机制。在该频率范围内，SE 被发现主要由吸收主导。复合材料的机械性能（拉伸、弯曲强度和模量）被发现与纯聚合物相当或更好。因此，研究表明该复合材料可用作结构坚固的 EMI 屏蔽材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/61678bd2f71f/1556-276X-4-327-11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/b0db434452c0/1556-276X-4-327-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/47711092add4/1556-276X-4-327-2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/f4938232ea26/1556-276X-4-327-3.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/ddda3609d8f4/1556-276X-4-327-5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/44b380ccd040/1556-276X-4-327-6.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/83ee6d0b9f56/1556-276X-4-327-8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/119126f39c42/1556-276X-4-327-9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/407886768086/1556-276X-4-327-10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/61678bd2f71f/1556-276X-4-327-11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/b0db434452c0/1556-276X-4-327-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/47711092add4/1556-276X-4-327-2.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/4b1d2da4531e/1556-276X-4-327-4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/ddda3609d8f4/1556-276X-4-327-5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/44b380ccd040/1556-276X-4-327-6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/95c7d5349c15/1556-276X-4-327-7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/83ee6d0b9f56/1556-276X-4-327-8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/119126f39c42/1556-276X-4-327-9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/407886768086/1556-276X-4-327-10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/aece/3248038/61678bd2f71f/1556-276X-4-327-11.jpg

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本文引用的文献

[1]
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Nature. 2007-6-28

[2]
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Nano Lett. 2006-6

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Nano Lett. 2005-11

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