Ag/polypyrrole composites for polarizable dry microsensor used in bioimpedance measurement

摘要

Biological signals such as electrocardiogram (ECG) that can be measured at home can reveal vital information about the patient’s health. For bioimpedance sensors was used type polarizable dry with the sensitive materials polypyrrole and composites with 10 and 20% Ag englobed in polypyrrole matrix. The polymer polypyrrole was synthetized by chemical oxidative polymerization method and the composites with Ag was obtained by introducing of pyrrole and oxidative agent in obtained Ag colloidal followed by the polymerization reaction. The morphology and elemental analysis were effected by SEM and EDX methods. The introduction of 20% Ag in the polymer led to an increase in conductivity at 1.05x10^{-1 S/m and a lower impedance value of 1.6 kΩ for 250kHz.}