ZnTiO3/epoxy resin nanocomposites: Development, dielectric behaviour and functionality

The main objective of this research was to prepare high thermal and dielectric performance PVDF/PVP/Co3O4 nanocomposites (PVDF, oply(vinylidene fluoride); PVP, polyvinylpyrrolidone) using the method of solution mixing. The structural properties and thermal stability of the samples were examined through measurements of XRD, SEM, Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). From the XRD measurements, the cubic crystal structure of the Co3O4 nanoparticles was revealed with an average size of 17 nm. Also, diffraction peaks of the α‐phase were seen in PVDF/PVP/Co3O4 nanocomposite spectra. The SEM images for the surface of the films showed a homogeneous distribution of the nanoparticles. The absorption peaks of both α‐ and β‐phases were confirmed by measurements of the FTIR spectra. The nanocomposite films grafted with Co3O4 nanoparticles possess high thermal stability. The dielectric permittivity and energy density of the nanocomposites improved significantly at 4.0 wt% Co3O4. Finally, the increase in Co3O4 content caused an improvement in dielectric response function as well as electrical conductivity. © 2021 Society of Industrial Chemistry.

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“…An important function called dielectric reinforcing (DRF) measures the response of polymer nanocomposites to achieve normalized polarization: 38,39

DRF goodbreak= \frac{ε_{1 (nanocomposite)}}{ε_{1 (pure polymer)}}

The dielectric response function is plotted in Fig. 5(b) at different concentrations of Co 3 O 4 .…”

Section: Resultsmentioning

confidence: 99%

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Taha

Mahmoud

Hamdeh

2021

Polymer International

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“…When the temperature exceeds a certain temperature, the α transition of the EP system occurs from glass to rubber and ε ′′ will increase rapidly with increased temperature. The temperature at which the α transition occurs is defined as α-transition temperature (T α ) [20].…”

Section: Dielectric Loss Of Ep Systems and Their Descriptorsmentioning

confidence: 99%

Computationally driven design of low dielectric-loss epoxy resin for medium-frequency transformers

Fan

Zhao

et al. 2023

J. Phys. D: Appl. Phys.

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The design of low dielectric loss epoxy resin (EP) systems plays an important role in the insulation optimization of medium-frequency transformers (MFTs). Due to the diversity of EP and curing agents, the traditional design method inspired by dielectric-loss measurements cannot reduce the low dielectric-losses of EP system designs from plentiful candidate EP systems. In this study, molecular dynamic (MD) computations were introduced to drive the design of a low dielectric-loss EP system for MFTs. By analyzing the relationship between dielectric loss and molecular motion of EP systems, two MD results were selected as descriptors for indicating the dielectric loss of EP systems, including mean square displacement and α-transition temperature. Eventually, a low dielectric-loss EP system blending EP, methyl tetrahydrophthalic anhydride, and dodecenyl succinic anhydride was effectively designed according to the descriptors. The rationality of the computation-driven design was verified by broadband dielectric spectroscopy measurements and finite element method. Compared with previous EP systems, MFT insulated with the designed EP system had not only a 40% lower dielectric loss (9.79 W) but a higher overload capacity. This study provides an effective method for the design of low dielectric-loss EP systems.

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“…Epoxy resins are employed in the manufacturing sector as matrix resins and adhesives for fiber-reinforced composite materials, where they benefit from advantageous traits like high modulus, low creep, and acceptable higher temperature performance. The desirable high crosslink density of epoxy thermosets is largely responsible for these materials' high glass transition temperatures [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Machine Learning Technique to Predict Flashover Voltage of Nanocomposite Materials

Qenawy,

Aldawsri,

Hossam-Eldin

et al. 2023

ijmst

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Epoxy resin is frequently employed in medium- and high- voltage transmission insulation, because of its low dielectric losses and excellent temperature resistance. At low temperatures, epoxy resin has high chemical resistance. Epoxy resin insulated types have largely superseded the conventional, paper-insulated varieties in numerous cable sectors owing to several advantages. Numerous studies have been conducted to enhance the properties of epoxy resin. With the addition of silicon dioxide (SiO2) nanofiller, the electrical and physical properties of epoxy resin are intended to be improved in this research. Epoxy resin composites with SiO2 filler were created with lengths of 5, 10, 15, and 20 mm and concentrated at 7wt%. Subsequently the key findings of this research are outlined, highlighting the significance of this study's focus on polymer utilized in the highly competitive and technologically advanced power industry, which is used globally.

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ZnTiO3/epoxy resin nanocomposites: Development, dielectric behaviour and functionality

Cited by 22 publications

References 26 publications

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Computationally driven design of low dielectric-loss epoxy resin for medium-frequency transformers

Machine Learning Technique to Predict Flashover Voltage of Nanocomposite Materials

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ZnTiO3/epoxy resin nanocomposites: Development, dielectric behaviour and functionality

Cited by 22 publications

References 26 publications

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co3O4 nanocomposites

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co3O4 nanocomposites

Computationally driven design of low dielectric-loss epoxy resin for medium-frequency transformers

Machine Learning Technique to Predict Flashover Voltage of Nanocomposite Materials

Contact Info

Product

Resources

About

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites