Academic Unit of Materials Engineering, Federal University of Campina Grande, Av. Aprígio Veloso, 882-Bodocongó, Campina Grande 58429-900, PB, Brazil.
Department of Metallurgic and Materials Engineering, Macromolecules Institute, Federal University of Rio de Janeiro, Rio de Janeiro 21941-598, RJ, Brazil.
Int J Mol Sci. 2022 Aug 12;23(16):9020. doi: 10.3390/ijms23169020.
Nylon 6/acrylonitrile-butadiene-styrene nanocomposites were prepared by mixing in a molten state and injection molded for application in electromagnetic interference shielding and antistatic packaging. Multi-wall carbon nanotubes (MWCNT) and maleic anhydride-grafted ABS compatibilizer were incorporated to improve the electrical conductivity and mechanical performance. The nanocomposites were characterized by oscillatory rheology, Izod impact strength, tensile strength, thermogravimetry, current-voltage measurements, shielding against electromagnetic interference, and scanning electron microscopy. The rheological behavior evidenced a severe increase in complex viscosity and storage modulus, which suggests an electrical percolation phenomenon. Adding 1 to 5 phr MWCNT into the nanocomposites produced electrical conductivities between 1.22 × 10 S/cm and 6.61 × 10 S/cm. The results make them suitable for antistatic purposes. The nanocomposite with 5 phr MWCNT showed the highest electromagnetic shielding efficiency, with a peak of -10.5 dB at 9 GHz and a value around -8.2 dB between 11 and 12 GHz. This was possibly due to the higher electrical conductivity of the 5 phr MWCNT composition. In addition, the developed nanocomposites, regardless of MWCNT content, showed tenacious behavior at room temperature. The results reveal the possibility for tailoring the properties of insulating materials for application in electrical and electromagnetic shielding. Additionally, the good mechanical and thermal properties further widen the application range.
尼龙 6/丙烯腈-丁二烯-苯乙烯纳米复合材料通过在熔融状态下混合并注塑成型制备，用于电磁干扰屏蔽和抗静电包装。多壁碳纳米管 (MWCNT) 和马来酸酐接枝 ABS 增容剂被加入以提高电导率和机械性能。纳米复合材料通过振荡流变学、Izod 冲击强度、拉伸强度、热重分析、电流-电压测量、电磁干扰屏蔽和扫描电子显微镜进行表征。流变行为表明，复合粘度和储能模量严重增加，表明存在电渗流现象。在纳米复合材料中添加 1 至 5 phr 的 MWCNT 可产生 1.22×10-3 至 6.61×10-3 S/cm 的电导率。结果表明它们适用于抗静电目的。含有 5 phr MWCNT 的纳米复合材料在 9 GHz 时表现出最高的电磁屏蔽效率，峰值为-10.5 dB，在 11 至 12 GHz 之间的数值约为-8.2 dB。这可能是由于 5 phr MWCNT 组成的更高电导率所致。此外，无论 MWCNT 含量如何，开发的纳米复合材料在室温下均表现出坚韧的行为。结果表明有可能对绝缘材料的性能进行定制，以应用于电和电磁屏蔽。此外，良好的机械和热性能进一步拓宽了应用范围。
