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首页> 外文期刊>Journal of Applied Polymer Science >Mild functionalization of carbon nanotubes filled epoxy composites: Effect on electromagnetic interferences shielding effectiveness
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Mild functionalization of carbon nanotubes filled epoxy composites: Effect on electromagnetic interferences shielding effectiveness

机译：碳纳米管填充环氧复合材料的轻度功能化：对电磁干扰屏蔽效果的影响

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摘要

The effect of nitric acid mild functionalized multiwalled carbon nanotubes (MWCNTs) on electromagnetic interference (EMI) shielding effectiveness (SE) of epoxy composites was examined. MWCNTs were oxidized by concentrated nitric acid under reflux conditions, with different reaction times. The dispersion of MWCNTs after functionalization was improved due to the presence of oxygen functional groups on the nanotubes surface. Functionalization at 2 h exhibits the highest EMI SE and electrical conductivity of MWCNTs filled epoxy composites. However, EMI shielding performance of MWCNTs filled epoxy composite declined when the functionalization reaction time was prolonged. This was due to extensive damage on the MWCNT structure, as verified by a Raman spectroscope. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42557.
机译：研究了硝酸温和的功能化多壁碳纳米管（MWCNT）对环氧复合材料的电磁干扰（EMI）屏蔽效能（SE）的影响。在回流条件下，浓硝酸将多壁碳纳米管氧化，反应时间不同。由于纳米管表面上存在氧官能团，官能化后的MWCNT分散性得到了改善。 2小时的功能化表现出最高的EMI SE和MWCNTs填充环氧树脂复合材料的电导率。然而，当官能化反应时间延长时，MWCNTs填充环氧复合材料的EMI屏蔽性能下降。这是由于拉曼分光镜证实了MWCNT结构的广泛破坏。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42557。

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