Lopes Cláudia, Ferreira Armando, Correa Marcio, Machado Rodrigues André, Mendes Paulo, Vaz Filipe
Physics Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, Braga 4710-057, Portugal.
LaPMET - Laboratory of Physics for Materials and Emergent Technologies, University of Minho, Braga 4710-057, Portugal.
ACS Appl Mater Interfaces. 2023 Aug 23;15(33):39872-39882. doi: 10.1021/acsami.3c07971. Epub 2023 Aug 1.
This study explores the potential of integrating thin-film technology in the design of new and effective electromagnetic interference (EMI) shielding and conductive materials for textiles and wearables. This application is of particular interest to the textile industry as it can bring new functionalities to wearables and protect humans from prolonged exposure to EM radiation. Three different thin films of pure Ti, pure Cu, and Ti-doped with Cu prepared by magnetron sputtering were used to functionalize textile knits based on cotton (code 39F) and lyocell fibers (62I). The films displayed different crystalline structures, morphologies, and topographies, which depended on their chemical compositions. The shielding effectiveness (SE) of the functionalized knits against EMI was evaluated in the frequency range of 2-8 GHz. Also, the electrical response under stress was assessed since the electrical conductivity is closely related to the EMI shielding effectiveness. The results demonstrate the feasibility of using a thin conductive layer based on Cu or Ti-Cu to improve the shield textiles with great adhesion and low thickness, providing an interesting path to improve shielding efficiency for EMI without modifying the flexibility of the textiles.
本研究探索了将薄膜技术集成到用于纺织品和可穿戴设备的新型高效电磁干扰（EMI）屏蔽及导电材料设计中的潜力。该应用对纺织行业尤为重要，因为它可为可穿戴设备带来新功能，并保护人体免受长时间的电磁辐射。通过磁控溅射制备的纯钛、纯铜以及铜掺杂钛的三种不同薄膜，被用于对基于棉（编号39F）和莱赛尔纤维（62I）的针织纺织品进行功能化处理。这些薄膜呈现出不同的晶体结构、形态和形貌，这取决于它们的化学成分。在2 - 8 GHz频率范围内评估了功能化针织品对EMI的屏蔽效能（SE）。此外，由于电导率与EMI屏蔽效能密切相关，因此还评估了应力下的电响应。结果表明，使用基于铜或钛 - 铜的薄导电层来改善屏蔽纺织品具有可行性，该导电层具有良好的附着力和低厚度，为在不改变纺织品柔韧性的情况下提高EMI屏蔽效率提供了一条有趣的途径。
