Dielectric and pyroelectric properties of a new family of modified polypeptide films

Abstract

The dielectric and pyroelectric properties of gelatin-based synthetic polypeptides were studied for possible sensor applications. Among the compositions examined, gelatin films modified with triglycerol were found to have particularly interesting properties. The films exhibited a strong dispersion in the dielectric permittivity accompanied by a high dielectric loss near room temperature. The possible relaxational mechanisms responsible for the observed dielectric behavior are discussed. The pyroelectric properties of the films were investigated. The measurements performed on prepoled samples proved the presence of a true, reversible pyroelectric response in the films. The value of the pyroelectric coefficient of the films was found to be comparable to that of PVDF polymer.<>