Synergistic Electrical, Mechanosensitive, and Photothermal‐Antibacterial Polyurethane/Carbon Nanotube Composites for Wearable Distributed Sensing

ABSTRACT The rapid advancement of wearable electronics and biomedical sensing necessitates flexible sensor materials with mechanical adaptability, electrical stability, and multifunctionality. Herein, we design a polytetrahydrofuran ether diol (PTMG)‐based polyurethane (PU) composite system incorporating carboxylated carbon nanotubes (CNTs) as conductive fillers. The polyurethane/carbon nanotube composite with 1% CNT content (PU/1% CNT) exhibits optimal performance, achieving a balanced electrical conductivity of 0.062 S/m, strain‐sensitive behavior with a tunable gauge factor (GF = 1.7–3.1) across graded deformations, and exceptional photothermal antibacterial efficacy (96.3%–100% inactivation rate). Notably, when integrated into a LabVIEW‐based multi‐channel testing system, the material demonstrates robust signal synchronization and distributed sensing capability. This work presents a versatile, stable, and scalable material platform for next‐generation flexible sensors, particularly in wearable health monitoring applications.