【摘要】 随着电磁辐射对人体健康和生活环境的危害日益增加，制备具有出色电磁干扰(EMI)屏蔽性能和优异稳定性的可穿戴式屏蔽织物有重要意义。目前制备屏蔽织物的难点在于保持织物基材与涂层良好结合的同时，赋予其高屏蔽性能。针对此，提出了一种逐步组装技术，用于构建复合涂层得到具有高EMI屏蔽性能和稳定性的透气柔性织物。首先，过渡金属碳/氮化物(MXene)纳米片与聚合物海藻酸钠(SA)的复合材料与织物基材结合形成稳定的层间结构，然后，将所得MXene-SA复合织物与钙离子进行交联，进一步增强其导电性能和稳定性。该织物具有优异的机械牢度和耐酸碱性，同时EMI屏蔽效能出色，在X波段上能达到36.35 dB。更多还原

【Abstract】 The wearable electromagnetic interference(EMI) shielding fabrics with outstanding electromagnetic shielding performance and excellent stability are of great importance due to the increasing danger of electromagnetic radiation to human health and the environment. The main issue is to give the fabric high performance while maintaining a good bonding between the fabric substrate and the coating. In view of this, a step-by-step assembly technology was presented to construct the composite coatings for the preparation of the breathable flexible fabrics with high EMI shielding performance and stability. Firstly, the transition metal carbide/carbon-nitride(MXene) nanosheets and the polymeric sodium alginate(SA) were assembled with the fabric through hydrogen bonding to form a stable interlayer structure. Secondly, the resulting MXene-SA composite fabric was cross-linked with the calcium ions to further enhance its electrical conductivity and stability. The fabric exhibited excellent mechanical fastness and resistance to the acids and alkalis, while an outstanding EMI shielding efficiency of 37.05 dB at X-band was achieved.更多还原