Polypropylene/Polyaniline Nanofiber/Reduced Graphene Oxide Nanocomposite with Enhanced Electrical, Dielectric, and Ferroelectric Properties for a High Energy Density Capacitor

Abstract

This work demonstrates a ternary nanocomposite system, composed of polypropylene (PP), redoped PANI (r-PANI) nanofibers, and reduced graphene oxides (RGOs), for use in a high energy density capacitor. r-PANI nanofibers were fabricated by the combination methods of chemical oxidation polymerization and secondary doping processes, resulting in higher conductivity (σ≈156 S cm(-1)) than that of the primarily doped PANI nanofibers (σ≈16 S cm(-1)). RGO sheets with high electron mobility and thermal stability can enhance the conductivity of r-PANI/RGO (σ≈220 S cm(-1)) and thermal stability of PP matrix. These findings could be extended to combine the advantages of r-PANI nanofibers and RGO sheets for developing an efficient means of preparing PP/r-PANI/RGO nanocomposite. When the r-PANI/RGO cofillers (10 vol %) were added to PP matrix, the resulting PP/r-PANI/RGO nanocomposite exhibited high dielectric constant (ε'≈51.8) with small dielectric loss (ε″≈9.3×10(-3)). Furthermore, the PP/r-PANI/RGO nanocomposite was used for an energy-harvesting device, which demonstrated high energy density (Ue≈12.6 J cm(-3)) and breakdown strength (E≈5.86×10(3) kV cm(-1)).

Thermally conductive thin films derived from defect free graphene-natural rubber latex nanocomposite: Preparation and properties

“…Because of the remarkable properties of graphene and its diversities as well as possibilities for functionalization (both covalently and non-covalently), polymer-graphene nanocomposites have been extensively studied and reviewed [27], [28], [29], [30]. However, only few studies are available on NR latex-graphene nanocomposites [31], [32], [33], [34], [35], [36], [37].…”

Comparative Studies on Polyurethane Composites Filled with Polyaniline and Graphene for DLP-Type 3D Printing

“…If the printed PU sculptures are electrically conductive, it will be possible to expand the application range of PU-based materials for DLP-type 3D printing. Accordingly, it is necessary to develop the electrical properties of PU resin by introducing appropriate fillers.Conducting polymers (CPs) with conjugated structures are polymeric materials capable of exhibiting electrical conductivity after appropriate doping [13][14][15][19][20][21][22][23][24][25][26][27]. These CPs offer a variety of advantages, including a unique redox behavior, reversible doping/dedoping, processability, they are light-weight and low-cost, and so forth [13][14][15][19][20][21][22][23][24][25][26][27].…”

“…Accordingly, it is necessary to develop the electrical properties of PU resin by introducing appropriate fillers.Conducting polymers (CPs) with conjugated structures are polymeric materials capable of exhibiting electrical conductivity after appropriate doping [13][14][15][19][20][21][22][23][24][25][26][27]. These CPs offer a variety of advantages, including a unique redox behavior, reversible doping/dedoping, processability, they are light-weight and low-cost, and so forth [13][14][15][19][20][21][22][23][24][25][26][27]. Among the various CPs, polyaniline (PANI) provides the widest range of oxidation levels and a comparable or similar level of conductivity to poly(3,4-dioxythiophene) (PEDOT) [13][14][15][21][22][23][24][25][26][27].…”

“…These CPs offer a variety of advantages, including a unique redox behavior, reversible doping/dedoping, processability, they are light-weight and low-cost, and so forth [13][14][15][19][20][21][22][23][24][25][26][27]. Among the various CPs, polyaniline (PANI) provides the widest range of oxidation levels and a comparable or similar level of conductivity to poly(3,4-dioxythiophene) (PEDOT) [13][14][15][21][22][23][24][25][26][27]. In addition, the cost of PANI is about one-hundredth of the price of the PEDOT.…”

Enhanced dielectric thermal stability and permittivity of flexible composite films based on BaTiO3 nanoparticles highly filled PVDF/PAN blend nanofibrous membranes

“…For polymer/ceramic filler composites, the improved dielectric permittivity is mainly ascribed to the interfacial polarization, also known as the Maxwell-Wagner effect [23][24][25]. In this work, for DCFs-Filtering, the enhancement of dielectric permittivity is attributed to high loading of BaTiO 3 nanoparticles and in particular remarkable interfacial polarization from good dispersion.…”