This study reports on the electrical conductivity, dielectric, and electromagnetic interferenc (EMI) shielding properties of conductive epoxy/PAni blend containing various concentrations. Polyaniline (PAni) was synthesized using oxidative chemical polymerization technique and then dispersed into epoxy resin using a sonication bath. Infrared spectra confirm the curing of composites. Increasing the aspect ratio of PAni in epoxy increased the electrical conductivity and improves the microwave absorption properties of composites in the microwave range (0.1 GHz–20 GHz). Electrical conductivity was measured by using the four-probe method, and the maximum conductivity of the composite was achieved 3.51 × 10⁻¹³ Scm⁻¹ with 30 wt% of PAni. The maximum porosity of the composite with 30 wt% of PAni was 15.5%. EMI shielding was measured by a vector network analyzer (VNA) in the microwave region (0.1 GHz–20 GHz), which gives the maximum value of 63 dB. IR shielding was measured by IR spectroscopy and less than 0.5% transmission was observed in NIR (700 nm–2500 nm) region. The average particle size of PAni is found to be 113 nm. These composites were used as a potential candidate for conductive coatings, EMI shielding purposes, and electronic applications.

本研究报告了含有不同浓度的导​​电环氧树脂/PAni 混合物的导电性、介电性和电磁干扰 (EMI) 屏蔽性能。聚苯胺 (PAni) 是使用氧化化学聚合技术合成的，然后使用超声浴将其分散到环氧树脂中。红外光谱证实了复合材料的固化。增加环氧树脂中 PAni 的纵横比会增加电导率并改善复合材料在微波范围 (0.1 GHz–20 GHz) 内的微波吸收性能。使用四探针法测量电导率，复合材料的最大电导率达到3.51×10 ^-13 Scm ^-1含有 30 wt% 的 PAni。含有 30 wt% PAni 的复合材料的最大孔隙率为 15.5%。EMI 屏蔽是通过矢量网络分析仪 (VNA) 在微波区域 (0.1 GHz–20 GHz) 中测量的，其最大值为 63 dB。通过红外光谱测量红外屏蔽，在 NIR (700 nm–2500 nm) 区域观察到小于 0.5% 的透射率。发现 PAni 的平均粒径为 113 nm。这些复合材料被用作导电涂层、EMI 屏蔽目的和电子应用的潜在候选材料。