Preparation and electromagnetic shielding performance study of MXene/polyaniline bulk composites
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摘要: 电磁屏蔽材料是降低电磁辐射污染的重要手段,其中导电聚合物基复合材料广受关/注. 选用MXene二维材料为功能基元,利用超声、机械搅拌和冷冻干燥的方法将MXene均匀分散于聚苯胺基体中,并通过放电等离子体烧结技术制备新型MXene/聚苯胺块体复合材料. 结果表明,MXene的高电导率和片层堆积结构可有效提高聚苯胺的电磁屏蔽性能. 当MXene质量分数为40%时,复合材料电磁屏蔽性能最优,在8.2~12.4 GHz范围内可达24 dB.
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关键词:
- 聚苯胺复合材料 /
- 电磁屏蔽 /
- 放电等离子体烧结技术
Abstract: Electromagnetic inference (EMI) shielding materials are vital for the reduction of EM radiation pollution, in which conductive polymer-based composites have attracted wide attentions. Herein, MXene/PANI bulk composites were successfully prepared by spark plasma sintering, in which MXene was chosen as the functional 2D materials evenly dispersed in the PANI matrix through ultrasonic, mechanical agitation and freeze-drying methods. Consequently, MXene with high electrical conductivity and lamellar structure effectively improves the EMI shielding performance of PANI. When the content of MXene is 40%, the composites achieve the optimal EMI shielding characteristics of 24 dB in the range of 8.2~12.4 GHz. -
表 1 聚苯胺及复合材料的电导率
Table 1. Conductivity of polyaniline and composites
性能参数 PANI 1% 5% 10% 40% 60% 电导率/(S∙cm−1) 3.81 2.20 5.18 5.56 10.30 6.98 -
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