Lightweight and Hydrophobic Three-dimensional Wood-derived Anisotropic Magnetic Porous Carbon for Highly-Efficient Electromagnetic Interference Shielding.
Lightweight and Hydrophobic Three-dimensional Wood-derived Anisotropic Magnetic Porous Carbon for Highly-Efficient Electromagnetic Interference Shielding.
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DOI：
10.1021/acsami.0c11530
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发表时间：
2020-08
影响因子：
9.5
通讯作者：
Yun Zheng;Yujuan Song;Tong Gao;Siyu Yan;Haihua Hu;Feng Cao;Yuping Duan;Xuefeng Zhang
中科院分区：
文献类型：
--
作者：
Yun Zheng;Yujuan Song;Tong Gao;Siyu Yan;Haihua Hu;Feng Cao;Yuping Duan;Xuefeng Zhang
构建多功能特性成为恶劣环境下先进电磁干扰屏蔽材料的发展趋势。在此，通过热解过程成功制备了具有高度有序各向异性多孔结构的木材衍生磁性多孔碳复合材料。继承自木材的三维多孔骨架作为导电网络，同时将磁性镍纳米颗粒均匀牢固地嵌入碳基体中，可以进一步提高电磁衰减能力。优化的 Ni/PC 复合材料在整个 X 频段 (8.2-12.4 GHz) 表现出 50.8 dB 的卓越 EMI 屏蔽效能，且厚度薄 (2 mm) 和超低密度 (0.288 g/cm3)，同时具有非凡的抗压强度 (11.7 MPa) 和疏水水接触角 (152.1o)。我们的研究提供了一种利用绿色木质材料设计多功能 EMI 屏蔽复合材料的替代策略。
Constructing multifunctional characteristics becomes a development trend toward advanced electromagnetic interference shielding materials in harsh environments. Herein, the wood-derived magnetic porous carbon composites with highly-ordered anisotropic porous architecture through a pyrolysis procedure were successfully fabricated. The three-dimensional porous skeleton inherited from the wood stock serves as an electrically conductive network and meanwhile incorporates magnetic Ni nanoparticles homogeneously and firmly embedded within the carbon matrix that can further improve the electromagnetic attenuation capacity. The optimized Ni/PC composite exhibits an exceptional EMI shielding effectiveness of 50.8 dB at the whole X band (8.2-12.4 GHz) with a low thickness (2 mm) and an ultralow density (0.288 g/cm3) and simultaneously possesses an extraordinary compressive strength (11.7 MPa) and a hydrophobic water contact angle (152.1o). Our study provides an alternative strategy to utilize green wood-based materials to design multifunctional EMI shielding composites.