Modifying the stiffness of thermoplastic polyurethane based ECG sensor by liquid blending of silicone-based monomer

Here, we report an effective method of modifying the mechanical stiffness of thermoplastic polyurethane (TPU)/carbon black (CB) nanocomposite to improve the quality of electrocardiography (ECG) by reducing electrode-skin interface impedance and consequently increasing the signal-to-noise ratio (SNR). Our results show the liquid blending of silicon-based monomer (Ecoflex A) and TPU before polymerization reduces the Young’ modulus of TPU/CB nanocomposite by 33% and the electrode-skin interface impedance of it by 38% and increases the SNR of ECG signals recorded using it by 15% in dB.