Electromagnetic Interference Shielding and Electrothermal Performance of MXene-Coated Cellulose Hybrid Papers and Fabrics Manufactured by a Facile Scalable Dip-Dry Coating Process,Advanced Engineering Materials

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Electromagnetic Interference Shielding and Electrothermal Performance of MXene-Coated Cellulose Hybrid Papers and Fabrics Manufactured by a Facile Scalable Dip-Dry Coating Process
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2021-07-10 , DOI: 10.1002/adem.202100548
Soo-Yeon Kim ₁ , Ha-Eun Gang ₁ , Gyu-Tae Park ₁ , Ha-Bin Jeon ₁ , Young Gyu Jeong ₁

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Herein, the electromagnetic interference (EMI) shielding and electrothermal properties of MXene-coated cellulose hybrid papers (MCPs) and fabrics (MCFs) with high flexibility and low density, which are manufactured by a dip-dry coating approach, are reported. For this purpose, MCPs and MCFs are fabricated by dipping cellulose papers and fabrics repeatedly into an aqueous dispersion of MXene. The electron microscopic and X-ray diffraction data reveal that MXene sheets are coated uniformly on the surfaces of cellulose fibrils and fibers and that their contents increase with the dip-dry coating cycle. For MCP10 (5.68 wt% MXene) and MCF10 (11.77 wt% MXene), which are manufactured by ten-time dip-dry coating cycles, high electrical conductivity of 1.91 and 0.08 S cm⁻¹ are attained, respectively. In addition, MCP10 and MCF10 possess excellent absolute EMI shielding effectiveness (SSEt) of 2198 and 1100 dB cm² g⁻¹ at 8 GHz, respectively, which is due to the multiple internal reflection and absorption of incident EM waves by conductive and interconnected MXene-coated cellulose fibrils and fibers. It is also found that MCP1 (0.9 wt% MXene) and MCF1 (1.9 wt% MXene) at one-time dip-dry coating cycle show outstanding electrothermal performance in aspects of high saturated temperatures and energy conversion efficiency at low applied voltages.

中文翻译：

MXene 涂层纤维素混合纸和织物的电磁干扰屏蔽和电热性能，由一种简便的可扩展浸干涂层工艺制造

在此，报告了通过浸干涂层方法制造的具有高柔韧性和低密度的 MXene 涂层纤维素混合纸 (MCP) 和织物 (MCF) 的电磁干扰 (EMI) 屏蔽和电热性能。为此，通过将纤维素纸和织物反复浸入 MXene 的水分散体中来制造 MCP 和 MCF。电子显微镜和 X 射线衍射数据表明 MXene 片材均匀地涂覆在纤维素原纤维和纤维的表面上，并且它们的含量随着浸干涂覆循环而增加。对于 MCP10 (5.68 wt% MXene) 和 MCF10 (11.77 wt% MXene)，它们通过十次浸干涂层循环制造，具有 1.91 和 0.08 S cm ^{-1 的}高电导率分别达到。此外，MCP10 和 MCF10在 8 GHz 下分别具有 2198 和 1100 dB cm ² g ^{-1 的}出色绝对 EMI 屏蔽效率 (SSEt) ，这是由于导电和互连的 MXene 对入射 EM 波进行多次内反射和吸收-涂层纤维素原纤维和纤维。还发现 MCP1 (0.9 wt% MXene) 和 MCF1 (1.9 wt% MXene) 在一次浸干涂层循环中在高饱和温度和低施加电压下的能量转换效率方面表现出出色的电热性能。

更新日期：2021-07-10

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