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PVC based flexible nanocomposites with the incorporation of Polyaniline and Barium Hexa-Ferrite nanoparticles for the shielding against EMI, NIR, and thermal imaging cameras
Synthetic Metals ( IF 4.0 ) Pub Date : 2021-04-20 , DOI: 10.1016/j.synthmet.2021.116773
Rukhsar Anum , Muhammad Zahid , Sabahat Siddique , HM. Fayzan Shakir , Z.A. Rehan

The chemical oxidative method was used for the polymerization of the polyaniline (PANI) by the use of ammonium persulphate as oxidant and formic acid as a dopant. The co-precipitation method was for the precipitation of barium Hexaferrite (BaFe). By the use of polyaniline, polyvinyl chloride, and barium Hexaferrite the magnetic and electrically conductive polymer nanocomposites films were synthesized with a solution casting method having a thickness of 0.5 mm. Enhanced EMI shielding effectiveness was achieved with very less nanocomposite film thickness using novel combination of electrically conductive polymer and ferrite nanoparticles. The effects of synthesis parameters on the features of the subsequent nanocomposites like near-infrared (NIR) transmission, electrical conductivity, tensile strength, and electromagnetic interference (EMI) shielding effectiveness by absorbance and reflection was examined in the frequency region of 0.1–20 GHz. The electrically conductive nanocomposites were characterized by XRD, UV/Vis/NIR spectroscopy, SEM, VNA, 2-Probe Method, and thermal images. The different concentrations of polyaniline and barium Hexaferrite result in different electrical conductivity values, mechanical properties, transmission value, and shielding efficiencies at the 0.1–20 GHz frequency range. The maximum attenuation achieved by PVC/PANI nanocomposites was 43.76 dB while PVC/PANI/BaFe nanocomposites have 78 dB.



中文翻译:

基于PVC的柔性纳米复合材料,结合了聚苯胺和六方铁氧体钡纳米粒子,可屏蔽EMI,NIR和热像仪

通过使用过硫酸铵作为氧化剂和使用甲酸作为掺杂剂,将化学氧化方法用于聚苯胺(PANI)的聚合。共沉淀方法用于沉淀六方铁酸钡(BaFe)。通过使用聚苯胺,聚氯乙烯和六方铁酸钡,以0.5mm的厚度的溶液流延法合成了磁性和导电聚合物纳米复合材料膜。使用导电聚合物和铁氧体纳米粒子的新型组合,可以用非常低的纳米复合膜厚度实现增强的EMI屏蔽效果。合成参数对后续纳米复合材料特征的影响,例如近红外(NIR)透射率,电导率,拉伸强度,在0.1–20 GHz的频率范围内,研究了通过吸收和反射产生的电磁干扰(EMI)屏蔽效果。通过XRD,UV / Vis / NIR光谱,SEM,VNA,2-探针法和热图像对导电纳米复合材料进行了表征。聚苯胺和六方铁酸钡的浓度不同,在0.1–20 GHz频率范围内会产生不同的电导率值,机械性能,透射率值和屏蔽效率。PVC / PANI纳米复合材料的最大衰减为43.76 dB,而PVC / PANI / BaFe纳米复合材料的最大衰减为78 dB。和热图像。聚苯胺和六方铁酸钡的浓度不同,在0.1–20 GHz频率范围内会产生不同的电导率值,机械性能,透射率值和屏蔽效率。PVC / PANI纳米复合材料的最大衰减为43.76 dB,而PVC / PANI / BaFe纳米复合材料的最大衰减为78 dB。和热图像。聚苯胺和六方铁酸钡的浓度不同,在0.1–20 GHz频率范围内会产生不同的电导率值,机械性能,透射率值和屏蔽效率。PVC / PANI纳米复合材料的最大衰减为43.76 dB,而PVC / PANI / BaFe纳米复合材料的最大衰减为78 dB。

更新日期:2021-04-20
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