Yang Jianming, Wang Hu, Zhang Yali, Zhang Hexin, Gu Junwei
School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui, 243032, People's Republic of China.
School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, Jiangsu, People's Republic of China.
Nanomicro Lett. 2023 Nov 23;16(1):31. doi: 10.1007/s40820-023-01246-8.
The utilization of eco-friendly, lightweight, high-efficiency and high-absorbing electromagnetic interference (EMI) shielding composites is imperative in light of the worldwide promotion of sustainable manufacturing. In this work, magnetic poly (butyleneadipate-co-terephthalate) (PBAT) microspheres were firstly synthesized via phase separation method, then PBAT composite foams with layered structure was constructed through the supercritical carbon dioxide foaming and scraping techniques. The merits of integrating ferroferric oxide-loaded multi-walled carbon nanotubes (FeO@MWCNTs) nanoparticles, a microcellular framework, and a highly conductive silver layer have been judiciously orchestrated within this distinctive layered configuration. Microwaves are consumed throughout the process of "absorption-reflection-reabsorption" as much as possible, which greatly declines the secondary radiation pollution. The biodegradable PBAT composite foams achieved an EMI shielding effectiveness of up to 68 dB and an absorptivity of 77%, and authenticated favorable stabilization after the tape adhesion experiment.
鉴于全球对可持续制造的推广，使用环保、轻质、高效且高吸收电磁干扰（EMI）屏蔽复合材料势在必行。在这项工作中，首先通过相分离法合成了磁性聚（己二酸丁二醇酯 - 对苯二甲酸丁二醇酯）（PBAT）微球，然后通过超临界二氧化碳发泡和刮涂技术构建了具有层状结构的PBAT复合泡沫。在这种独特的层状结构中，明智地整合了负载四氧化三铁的多壁碳纳米管（FeO@MWCNTs）纳米颗粒、微孔框架和高导电银层的优点。微波在“吸收 - 反射 - 再吸收”过程中尽可能多地被消耗，这大大减少了二次辐射污染。这种可生物降解的PBAT复合泡沫实现了高达68 dB的EMI屏蔽效能和77% 的吸收率，并在胶带粘贴实验后证明具有良好的稳定性。
