High performance polymer matrix nanocomposites based on poly(ether-sulfone) (PES) as matrix and multiwalled carbon nanotube (MWCNT) as reinforcement were fabricated using planetary ball mill followed by hot pressing. Their electrical properties and the electromagnetic interference shielding effectiveness (EMI-SE) were investigated and discussed. A percolation threshold of about 0.65 vol% MWCNT was obtained. The electrical conductivity was increased more than ten orders of magnitude at the percolation threshold and to approximately 0.01 S/cm at 6.67 vol% (or 10 wt%) MWCNT. This is a significant improvement. The highest EMI-SE of about 29-30 dB (both in X- band and Ku-band) was obtained for the 6.67 vol% MWCNT filled nanocomposites with thickness of 0.9 mm. The specific EMI-SE of these nanocomposites were found higher than the literature values. The thermal stability and the char yield (measured at 900 oC) of the nanocomposites were found more than 470 oC and 40.6 %, respectively.

中文翻译：

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通过环保途径制备的聚（醚-砜）/多壁碳纳米管纳米复合材料的高电磁干扰屏蔽

采用行星式球磨机和热压法制备了以聚醚砜 (PES) 为基体和多壁碳纳米管 (MWCNT) 为增强体的高性能聚合物基体纳米复合材料。研究和讨论了它们的电气特性和电磁干扰屏蔽效率 (EMI-SE)。获得了约 0.65 vol% MWCNT 的渗透阈值。在渗透阈值下，电导率增加了十多个数量级，在 6.67 vol%（或 10 wt%）MWCNT 下，电导率增加到大约 0.01 S/cm。这是一个显着的改进。对于厚度为 0.9 mm 的 6.67 vol% MWCNT 填充纳米复合材料，获得了约 29-30 dB（X 波段和 Ku 波段）的最高 EMI-SE。发现这些纳米复合材料的特定 EMI-SE 高于文献值。