Biocompatible Collagen/Liquid Metal/Carbon Nanotube Hydrogel for Electromagnetic Interference Shielding in Bioelectronics

Le résumé fourni par la source

The rapid advancement of implantable bioelectronics and wireless medical devices has made electromagnetic interference (EMI) shielding a critical challenge, particularly for ensuring signal stability in cardiac pacemakers, neural implants, and biosensors. However, achieving stable EMI shielding without compromising biocompatibility remains a significant hurdle in these applications. In this study, we address this challenge by developing a superstretchable, biocompatible hydrogel through in situ polymerization of fish-scale-derived collagen (COL) with a liquid metal-carbon nanotube (LM-CNT) composite, achieving exceptional EMI shielding performance. Here, we present a fish-scale-derived collagen hydrogel integrated with an LM-CNT network, which simultaneously achieves exceptional EMI shielding effectiveness (56.33 dB in X-band), ultrahigh stretchability (2230%), and high conductivity (50.75 S/m). The unique three-dimensional LM-CNT architecture enables efficient electromagnetic dissipation, while the natural collagen matrix ensures full biocompatibility─critical for applications in cardiac pacemakers and neural interfaces. This combination of performance and biosafety positions the material as a versatile solution for next-generation bioelectronic shielding.

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