The rapid popularity of portable and wearable smart electronics has put forward more stringent requirements for flexible electromagnetic interference (EMI) shielding films with excellent mechanical strength and EMI shielding effectiveness (SE). However, there are still many obstacles to simultaneously satisfy the above critical requirements and new strategy for designing high-performance EMI shielding films is needed. Herein, a flexible and highly-efficient EMI shielding waterborne polyurethane (WPU) composite film with excellent mechanical strength and shielding stability is prepared by the facile compounding with silver coated non-woven fabrics (Ag/NWF). The Ag/NWF/WPU composite film (10.5 wt% Ag) with a thickness of only 400 μm possesses an outstanding EMI SE of 72.5 dB in the frequency range of 2–18 GHz, and the tensile strength can reach 12 MPa. The incorporation of FeCo alloy deposited on reduced graphene oxide ([email protected]) nanoparticles further improves the EMI SE to 77.1 dB. Moreover, because of the robust mechanical properties of the composite film, a highly reliable shielding ability is also achieved with over 95% EMI SE retention after 1000 folding cycle tests. This flexible and robust WPU film with highly-efficient shielding performance is promising for the application in next-generated flexible electronic devices.

便携式和可穿戴智能电子产品的迅速普及对具有优异机械强度和EMI屏蔽效能（SE）的柔性电磁干扰（EMI）屏蔽膜提出了更严格的要求。但是，同时满足上述关键要求仍然存在许多障碍，因此需要设计高性能EMI屏蔽膜的新策略。在此，通过容易地与涂银无纺布（Ag / NWF）复合，制备了具有优异的机械强度和屏蔽稳定性的挠性且高效的EMI屏蔽水性聚氨酯（WPU）复合膜。Ag / NWF / WPU复合膜（10.5 wt％Ag）的厚度仅为400μm，在2-18 GHz的频率范围内具有72.5 dB的出色EMI SE，抗拉强度可达12 MPa。沉积在还原的氧化石墨烯（[受电子邮件保护]）纳米颗粒上的FeCo合金的掺入将EMI SE进一步提高至77.1 dB。此外，由于复合薄膜的鲁棒机械性能，在经过1000次折叠循环测试后，具有超过95％的EMI SE保留率，还获得了高度可靠的屏蔽能力。这种具有高屏蔽性能的柔性，坚固的WPU膜有望用于下一代柔性电子设备中。经过1000次折叠循环测试，EMI保留率达到95％以上，从而实现了高度可靠的屏蔽能力。这种具有高屏蔽性能的柔性，坚固的WPU膜有望用于下一代柔性电子设备中。经过1000次折叠循环测试，EMI保留率达到95％以上，从而实现了高度可靠的屏蔽能力。这种具有高屏蔽性能的柔性，坚固的WPU膜有望用于下一代柔性电子设备中。