论文部分内容阅读
用化学方法合成盐酸掺杂的导电聚苯胺,然后以静电纺丝技术制备PANI-HCl/PAN纳米柔性电磁屏蔽材料。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表征分析,并用电子万能试验机和矢量网络分析仪分别对导电聚苯胺薄膜的力学性能及屏蔽特性进行了测试和分析。结果表明,随着PANI-HCl含量的增加,纺丝溶液的电导率增加,纳米纤维直径减少,力学性能降低;PANI-HCl/PAN纳米薄膜的电磁屏蔽性能随着薄膜厚度的增加,电磁屏蔽性能提高,当薄膜厚度为91.04μm时,薄膜的电磁屏蔽效能达到20.38dB;同时,纳米纤维膜在低频段均表现良好的电磁屏蔽效果,在1～9MHz频率范围内,当聚苯胺的含量达到13%时,屏蔽率达到90%以上。
Hydrochloric acid-doped conductive polyaniline was synthesized by chemical method, and PANI-HCl / PAN nano-flexible electromagnetic shielding material was prepared by electrospinning technique. The structure and morphology of the nanofibers were characterized by infrared spectroscopy and scanning electron microscopy respectively. The mechanical properties and shielding properties of the conducting polyaniline films were tested and analyzed by electronic universal testing machine and vector network analyzer respectively. The results show that with the increase of PANI-HCl content, the conductivity of spinning solution increases, the diameter of nanofibers decreases, and the mechanical properties decrease. The electromagnetic shielding performance of PANI-HCl / PAN nanofilms increases with the increase of film thickness. When the thickness of the film is 91.04μm, the electromagnetic shielding effectiveness of the film reaches 20.38dB; at the same time, the nanofiber membrane exhibits good electromagnetic shielding effect in the low frequency range. When the content of polyaniline reaches 13 %, The shielding rate of more than 90%.