Jianming Yang, Hu Wang, Yali Zhang, Hexin Zhang* and Junwei Gu*. Layered structural PBAT composite foams for efficient electromagnetic interference shielding. Nano-Micro Letters, 2024, 16: 31. DOI:10.1007/s40820-023-01246-8. 2023IF=31.6. (1區(qū)材料科學(xué)Top期刊,中國科技期刊卓越行動計(jì)劃-領(lǐng)軍類期刊項(xiàng)目)
https://doi.org/10.1007/s40820-023-01246-8
Abstract
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-coterephthalate) (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 (Fe3O4@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.
在全球倡導(dǎo)可持續(xù)制造的背景下，開發(fā)環(huán)保、輕質(zhì)、高效和高吸收電磁干擾（EMI）屏蔽復(fù)合材料勢在必行。本工作首先通過相分離法合成了磁性聚（己二酸丁二醇酯-對苯二甲酸丁二酯）（PBAT）微球，然后通過超臨界二氧化碳發(fā)泡和刮涂技術(shù)構(gòu)建了具有層狀結(jié)構(gòu)的PBAT基電磁屏蔽復(fù)合泡沫。這種獨(dú)特結(jié)構(gòu)巧妙地融合了四氧化三鐵負(fù)載多壁碳納米管（Fe3O4@MWCNTs）納米粒子、微孔骨架和高導(dǎo)電銀層的優(yōu)點(diǎn)。微波在整個“吸收-反射-再吸收”的過程中被盡可能地消耗，從而大大減少了二次電磁輻射污染。可生物降解PBAT復(fù)合泡沫的電磁屏蔽效能高達(dá)68 dB，吸收電磁波效率為77%，并在膠帶粘接實(shí)驗(yàn)中表現(xiàn)出良好的穩(wěn)定性。
論文亮點(diǎn)
1. 借助相分離法成功合成了磁性可降解PBAT微球，并利用隔離網(wǎng)絡(luò)設(shè)計(jì)和超臨界發(fā)泡技術(shù)制備了層狀結(jié)構(gòu)PBAT-Fe3O4@MWCNTs/Ni/Ag復(fù)合泡沫。
2. Fe3O4@MWCNTs納米粒子和微孔結(jié)構(gòu)的引入有效強(qiáng)化磁損耗和多重反射吸收作用，形成了“吸收-反射-再吸收”的電磁屏蔽機(jī)制。
3. 層狀結(jié)構(gòu)復(fù)合材料的平均電磁屏蔽效能達(dá)到了68.0 dB，對電磁波的反射率可降低至23％，且在500次膠帶粘接實(shí)驗(yàn)中表現(xiàn)出良好的屏蔽穩(wěn)定性。
第一作者：楊建明
郵件地址：[email protected]
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