Lightweight polymethacrylimide@copper/nickel composite foams for electromagnetic shielding and monopole antennas
Lightweight polymethacrylimide@copper/nickel composite foams for electromagnetic shielding and monopole antennas
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用于电磁屏蔽和单极天线的轻质聚甲基丙烯酰亚胺@铜/镍复合泡沫
DOI：
10.1016/j.compositesa.2020.106144
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发表时间：
2021-01-01
影响因子：
8.7
通讯作者：
Zhang, Guangcheng
中科院分区：
文献类型：
--
作者：
Li, Jianwei;Wang, Aifeng;Zhang, Guangcheng
便携式电子设备近年来已经变得普遍，并且促进了减小其尺寸和重量的迫切需求。本文采用化学镀方法制备了复合镀铜和镀镍的聚甲基丙烯酰亚胺泡沫（PMIF@Cu和PMIF@Ni）。当化学镀时间为70 min时，PMIF@Cu和PMIF@Ni复合泡沫的表面电导率分别达到1.06 × 10（4）S/m和9.15 × 10（3）S/m，电磁屏蔽效能（EMI SE）分别达到52 dB和43 dB。金属化PMI泡沫作为垂直极化微带天线，具有良好的辐射性能和与馈线的匹配度。更重要的是，基于金属化泡沫的天线的重量比纯铜天线轻25-30倍。所制备的金属化PMI复合泡沫材料可用于替代传统的金属基天线，从而促进便携式通信设备的轻量化设计。
Portable electronic devices have become widespread in recent years and promoted urgent demand of reducing their size and weight. Here, the composite copper and nickel-plated polymethacrylimide foams (PMIF@Cu and PMIF@Ni) were prepared via electroless plating method. The surface electrical conductivity of the PMIF@Cu and PMIF@Ni composite foams reach to 1.06 x 10(4) S/m and 9.15 x 10(3) S/m when the electroless plating time is 70 min, and the electromagnetic interface shielding effectiveness (EMI SE) of similar to 52 dB and similar to 43 dB could be achieved, respectively. Moreover, the metallized PMI foams present remarkable radiation performances and good matching degree with the feeder as vertically polarized monopole antennas. More importantly, the weight of the metallized foam based antennas are 25-30 times less than the pure copper antenna. The prepared metallized PMI composite foams can be used to replace the traditional metal-based antennas and thus facilitate the lightweight design of the portable telecommunication devices.