Abstract
The development of multifunctional electromagnetic interference (EMI) shielding films with optical transparency is highly urgent as visual windows in modern optoelectronic devices. Herein, Ti3C2Tx nanosheet (MXene)-based transparent conductive films (TCFs) with thermoplastic polyurethane (TPU) as substrates were prepared by simple spraying, which was further applied in high-performance EMI shielding, Joule heating, and photothermal conversion. The comprehensive properties of the transparent MXene/TPU films can be optimized by adjusting the thickness of the MXene layer. The optimal TCF showed a sheet resistance of 119.1 Ω/sq, a transmittance of 43.1%, and an average EMI shielding effectiveness of 10.9 dB. Meanwhile, this TCF exhibited a stable EMI shielding performance to resist bending and stretching. Moreover, the multifunctional MXene/TPU film presented remarkable thermal management performances, including Joule heating (89.4 °C @ 7 V) and photothermal conversion (72 °C @ 100 mW/cm2) abilities. This work presents flexible and stretchable MXene-based TCFs with satisfactory EMI shielding performance and multisource thermal response behavior, which is promising for various transparent and flexible electronic devices.
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