Biodegradable, Flexible Transparent Ordered Ag NWs Micromesh Conductor for Electrical Heater and Electromagnetic Interference Shielding Applications

Flexible transparent and biodegradable conductors with excellent performance are quite desirable for the development of portable electrical heaters and electromagnetic interference (EMI) shielding. As a promising candidate, electrical homogeneity and stability are required for a silver nanowire (Ag NW) network conductor to increase its reliability and robustness. Herein, an optimally well organized silver nanowire micromesh (Ag NMs) electrode embedded in biodegradable poly(L- lactic acid) (Ag NMs/ePLLA) is prepared without a template by virtue of the coffee-ring effect. The Ag NMs/ePLLA electrode possesses a low sheet resistance variation (<5%), leading to a highly homogeneous temperature distribution and a rapid response time of 6 s with a saturation temperature of 111.8 degrees C at a low driving voltage of 3 V. Moreover, the Ag NMs/ePLLA film also shows an outstanding EMI shielding efficiency of similar to 27.6 dB in X-band with a sheet resistance of similar to 10 omega/sq to prevent electromagnetic radiation pollution and excellent biodegradable properties to avoid pollution by electronic waste. Therefore, the multifunctional portable Ag NMs/ePLLA electrode provides great opportunities in the application fields of thermal management and EMI shielding.