Dielectric Properties of Fibrous Composite Materials Based on Piezoelectric and Conductive Polymers

In this work, a comparative experimental study of the dielectric properties of films based on the piezoelectric polymer PVDF and its copolymer PVDF-TrFE, as well as fibrous samples made from PVDF-TrFE was carried out. The dielectric properties of biocompatible polymer composite materials based on PVDF - TrFE copolymer fibers modified by coating with various conductive polymers (polypyrrole and polyaniline) were also investigated and analyzed, and the dielectric response of the synthesized composites to environments with different acidity was studied. It was found that the studied composites based on piezoelectric and conductive polymers are characterized by a strong dependence of capacitance values on the acidity of the environment. The results obtained can be considered as the basis for creating working elements of new medical sensors that respond to the acidity of the environment.