Electrical properties of polymer nanocomposites based on polyethylene oxide and silver nanoparticles in the area of low filler concentrations
Abstract
Polymer nanocomposite materials filled with silver nanoparticles are promising because they combine the properties of polymers and inorganic substances. Such materials have wide practical applications, in particular as antimicrobial and electrostatic coatings. The vast majority of works study 3/2022 the polymer-silver nanoparticles system with a high filler content. However, due to the nanosize of the filler in the area of low concentrations, effects may appear that require detailed study. The purpose of this work has been the development of a new material based on polyethylene oxide (PEO) and synthesized and stabilized silver nanoparticles, as well as the study of its electrical properties in the area of low filler concentrations. The paper has developed a new approach to the synthesis of silver nanoparticles. Using this approach, stabilized silver nanoparticles have been synthesized. Using the method of impedance spectroscopy, the electrical properties of polymer nanocomposite materials based on PEO and synthesized silver particles in the area of low filler concentrations have been investigated. It is assumed that in systems based on PEO, there are two mechanisms of charge transfer: charge hopping in the crystalline phase of PEO and transfer provided by the segmental mobility of polyether chains in the amorphous phase of PEO. As a result, it is established that stabilized silver nanoparticles significantly affect the electrical properties of the nanocomposite material at relatively low concentrations of the nanofiller (1%). The electrical conductivity of the studied materials depends extremely on the content of the filler. This dependence is explained by the aggregation processes of nanoparticles in the polymer matrix, which changes the proportion of the interfacial layer due to additional amorphization of the system. It is assumed that with a 1% content of silver nanoparticles, the total area of the interfacial layer is maximal
Keywords
electrical conductivity; interfacial layer; aggregation; compositel nanofiller; impedance spectroscopy
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