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采用静电纺丝技术制备了聚丙烯腈/多壁碳纳米管(PAN/MWNTs)复合纳米纤维。利用红外光谱和扫描电镜分别对纳米纤维结构和形貌进行了表征分析,并用高阻仪和矢量网络分析仪分别对PAN/MWNTs纳米纤维的导电性能及电磁屏蔽性能进行了测试。结果表明,随着MWNTs含量的增加,纤维直径减小,纤维的导电性能增强;纳米纤维膜在低频段均表现良好的电磁屏蔽效果,在1～15MHz频率范围内,当碳纳米管的含量达到10%以上时,屏蔽率达到90%以上。
Polyacrylonitrile / multiwalled carbon nanotubes (PAN / MWNTs) nanofibers were prepared by electrospinning. The structure and morphology of the nanofibers were characterized by infrared spectroscopy and scanning electron microscopy respectively. The conductivity and electromagnetic shielding properties of PAN / MWNTs nanofibers were tested by high-resistance spectrometer and vector network analyzer respectively. The results show that with the increase of MWNTs content, the diameter of the fibers decreases and the conductivity of the fibers increases. The nanofiber membranes exhibit good electromagnetic shielding effect in the low frequency range. When the content of MWNTs reaches Above 10%, the shielding rate of more than 90%.