气凝胶
化学工程
复合材料
傅里叶变换红外光谱
反射损耗
聚合物
热重分析
热稳定性
纳米复合材料
作者
Avinash R. Pai,T. Binumol,Deepu A. Gopakumar,Daniel Pasquini,Bastien Seantier,Nandakumar Kalarikkal,Sabu Thomas
标识
DOI:10.1016/j.carbpol.2020.116663
摘要
Abstract Electromagnetic (EM) pollution is ubiquitous and has soared to a great extent in the past few decades. The use of plant sourced cellulose nanofibers to fabricate sustainable and high performance electromagnetic shielding materials is foreseen as a green solution by the electronics industry to address this unseen pollutant. In this view, we report a facile and environmentally benign strategy to synthesize ultra-light and highly conductive aerogels derived from cellulose nanofibers (CNF) decorated with polyaniline (PANI) via a simple in-situ polymerization and subsequent freeze drying process devoid of any volatile organic solvents. The obtained conductive aerogels exhibited density as low as 0.01925 g/cc with a maximum EMI shielding value −32 dB in X band region. These porous shields demonstrated strong microwave absorption behavior (95 %) with minimal reflection (5 %) coupled with high specific EMI SE value ∼1667 dB.cm3. g−1 which make these aerogels a potential candidate for use in telecommunication, military and defense applications.
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