A Multifunctional MXene/CNF/PVB Fabric via Layer-by-Layer Construction for Electromagnetic Interference Shielding, Joule Heating, and Infrared Stealth

en This link goes to a English section zh This link goes to a Chinese section The rapid advancement of 5G communication technology has intensified electromagnetic pollution, creating an urgent demand for flexible multifunctional fabrics with efficient electromagnetic interference (EMI) shielding performance. This study proposes a novel material-stacked construction strategy to fabricate multifunctional MXene/cellulose nanofiber/polyvinyl butyral (MXene/CNF/PVB) composite fabrics by sequentially depositing two-dimensional MXene nanosheets, CNF, and PVB onto the surface of linen fabric. Benefiting from the pretreatment with the cationic polyelectrolyte poly(diallyldimethylammonium chloride) (PDDA), MXene nanosheets can adhere firmly to the fibers via electrostatic self-assembly and impart the fabric with excellent EMI shielding performance (47.87 dB). Meanwhile, optimizing the CNF concentration effectively enhances the mechanical strength of the fabric (45.27 MPa). The incorporation of PVB significantly improves the environmental stability and durability of the composite fabrics. As a result of the synergistic combination of high electrical conductivity and favorable infrared radiation suppression characteristics of MXene, the fabricated MXene/CNF/PVB composite-coated fabric achieved a mechanical strength of 49.68 MPa, an EMI SE of 39.31 dB, efficient Joule heating (62.5°C at 5 V), and effective infrared stealth, as evidenced by a low radiation temperature of 51.3°C against a 100°C background. These results demonstrate the strong potential of MXene/CNF/PVB composite fabrics for next-generation wearable and multifunctional electronic applications. 摘要 en This link goes to a English section zh This link goes to a Chinese section 5G通信技术的飞速发展加剧了电磁污染问题, 亟需开发具有高效电磁干扰 (EMI) 屏蔽性能的柔性多功能织物。本研究提出一种新颖的材料堆叠构建策略, 通过将二维MXene纳米片、纤维素纳米纤维 (CNF) 和聚乙烯醇缩丁醛 (PVB) 依次沉积在亚麻织物表面, 制备出多功能MXene/CNF/PVB复合织物。基于阳离子聚电解质聚二烯丙基二甲基氯化铵 (PDDA) 的预处理, MXene纳米片可通过静电自组装牢固附着在纤维表面, 使织物获得卓越的电磁干扰屏蔽性能 (47.87 dB) 。同时, 通过优化CNF浓度有效提升了织物的机械强度 (45.27 MPa) 。PVB的引入则显著增强了复合织物的环境稳定性和耐久性。得益于MXene的低红外发射率和优异导电性, 最终制得的MXene/CNF/PVB复合织物展现出优异的综合性能: 电磁屏蔽效能达39.31 dB, 机械强度提升至49.68 MPa, 具备高效焦耳加热能力 (5 V电压下可达62.5℃) , 并表现出显著的红外隐身特性 (100℃时辐射温度仅为51.3℃) 。这些研究成果充分证明了MXene/CNF/PVB屏蔽织物在下一代可穿戴电子领域的巨大应用潜力。