DIELECTRIC PROPERTIES OF POLYANILINE-FUNCTIONALIZED CARBON NANOTUBE/PDMS NANOCOMPOSITES

Abstract

In recent years, carbon nanotubes (CNTs) have emerged as materials that are often used in the preparation of polymer nanocomposites with conductive or advanced dielectric properties due to their unique properties including high temperature and electrical conductivity, which allows the production of very light and robust materials with a very high length-to-diameter ratio. However, during the preparation of polymeric nanocomposites with these materials, some problems are encountered. One of the major problems is that after preparing these conductivematerials or adding them into the polymer, they tend to aggregate, forming agglomerate, due to their conductive structures. Therefore, in this study, firstly, multi-walled carbon nanotubes (MWCNTs) were functionalized with conductive form of polyaniline (PANI) and subsequently, the poly (dimethyl siloxane) (PDMS) polymer nanocomposite films with different concentrations of functionalized multi-walled carbon nanotubes were prepared. Then, the structural, morphological, electrical and dielectric properties of the films were characterized. As a result, with the addition of only 1.5% PANI-CNT, the dielectric constant of PDMS was increased by 47-fold at 1 Hz. The dielectric films like presented here can be used in capacitors, flexible electronics, dielectric elastomers and artificial muscle applications.

Keywords

• karbon nanotüp (cnts)
• i̇letken polimer
• dielektrik
• polianilin (pani)
• polimer nanokompozit
• poli (dimetil siloksan) (pdms)
• carbon nanotubes (cnts)
• conductive polymer
• dielectric
• polyaniline (pani)
• polymer nanocomposite
• poly(dimethyl siloxane) (pdms)