Effect of Particle Size and Dispersion on Dielectric Properties in ZnO/Epoxy Resin Composites

Yang, Wei; Yi, Ran; Xu, Yang; Xu, Man; Hui, Sisi; Cao, Xiaolong

doi:10.4313/teem.2012.13.3.116

Cited by 25 publications

(10 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4a it obviously seen that, dielectric constant of pure chitosan film is higher than that of all nanocomposite films of chitosan/ZnO samples (Z11,Z21), The possibility that Zn ions in all samples slow down the comparatively fast segmental motion of Chitosan due to "nano effect" 11 . So, if nano particles were added, the dielectric constant of a polymer composite would decrease.…”

Section: Dielectric Propertiesmentioning

confidence: 92%

Effect of Preparation Method on the Particles Size, Dielectric Constant and Antibacterial Properties of ZnO Nanoparticles and Thin Film of ZnO/Chitosan

Alturki¹

2018

Orient. J. Chem

View full text Add to dashboard Cite

In the present work, we have synthesized zinc oxide nanoparticles by two different methods simple solution route and sol-gel (Z1, Z2). SEM analysis of ZnO nanoparticles samples (Z1 and Z2) showed that, the morphology of samples found to be look like nanorods. Transmission Electron Microscopy (TEM) images showed that the particles are spherical, and the particles size of sample Z2 larger than sample Z1. The partial size of sample Z1 is between 17.61 to 2.81 nm and for sample Z2 was between 25 to 6 nm. Also, thin films of ZnO/Chiosan nanocomposites (Z11and Z21) were prepared to study dielectric and antibacterial properties. Results showed that, the value of the dielectric constant for sample Z11 is less than the value of Z 21, it is may be due to different in particles size according to the space-charge theory (dielectric constant increase with increasing of particles size). Frequency dependence dielectric properties of ZnO/Chiosan thin films (Z11 and Z21) at room temperature were measured. Dielectric constant ε' and dielectric loss ε" for all samples were found to be decrease with increasing frequency.The synthesized ZnO/Chiosan nanocomposite films exhibited activity against Gram-negative Pseudomonas aeruginosa (PA), and Gram-positive Staphylococcus aureus (SA).All results indicated that, the antimicrobial activity of the nanocomposite film samples due to presence of nano ZnO particles.

show abstract

Section: Dielectric Propertiesmentioning

confidence: 92%

Effect of Preparation Method on the Particles Size, Dielectric Constant and Antibacterial Properties of ZnO Nanoparticles and Thin Film of ZnO/Chitosan

Alturki¹

2018

Orient. J. Chem

View full text Add to dashboard Cite

show abstract

“…Recently with the development of nano-technology, polymer nanocomposites filled with inorganic filler also began to emerge with staple momentum in the field of electrical engineering to meet the much higher requirement for electrical power with ultra-high voltage. It has been widely reported that, composites filled with filler of nano scale possess superior high voltage resistance comparing to traditional microfiller [1][2][3], either in short term or long term, just as what have been observed in concern of mechanical properties. This phenomenon was always attributed to "Nano effect" which was usually thought originated from the ultra-large specific interface between the ultrafine particles and matrix [4,5].…”

Section: Introductionmentioning

confidence: 80%

Investigation on relationship between breakdown strength enhancement of composites and dielectric characteristics of nanoparticle

Yuan-wu

2016

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

In this work, the relationship between dielectric characteristics of nanoparticle and its effects on dielectric breakdown strength of Epoxy was investigated. The dielectric characteristic was tailored through silica surface encapsulation on TiO2. It was found that in contrast to raw TiO2, addition of TiO2@SiO2 core-shell nanoparticle obviously improved the dielectric breakdown strength of epoxy resin. Meanwhile, peculiar increase of resistivity was also observed. Based on the results, a mechanism through "barrier effect" by electric double layer was proposed to explain this enhancement, which was regarded closely associated with the highly polarizable and surface insulating features of TiO2 after silica encapsulation. Experimental validation was also conducted with permittivity and space charge distribution measurement of composites. It was concluded that the high polarizability and surface insulativity firstly favored formation of the double layer, synergistically from which the resulted space charge in homo-pattern then suppressed excessive charge injection through Coulomb repulsive interaction, and improved electrical strength by retarding exorbitant localized field occurrence which had been found to be direct cause of breakdown when it exceed a critical value.Index Terms -Barrier effect, core-shell nanoparticle, dielectric breakdown, dielectric characteristics of nanoparticle, dielectric double layer, enhancing mechanism, epoxy nanocomposites.

show abstract

“…The impact of the preparation method on dielectric properties of epoxy nanocomposites is shown in Fig. 4(a), 4(b), 4(c), and 4(d) [19]. Nanocomposite (NEP) is prepared using ultrasonication whereas ultrasonication is omitted in microcomposite (MEP) preparation.…”

Section: Role Of Dispersion In Nanocomposite Characteristicsmentioning

confidence: 99%

A Review on Nanocomposite Based Electrical Insulations

Paramane¹,

Kumar²

2016

Transactions on Electrical and Electronic Materials

View full text Add to dashboard Cite

The potential of nanocomposites have been drawing the intention of the researchers from energy storage to electrical insulation applications. Nanocomposites are known to improve dielectric properties, such as the increase in dielectric breakdown strength, suppressing the partial discharge (PD) as well as space charge, and prolonging the treeing, etc. In this review, different theories have been established to explain the reactions at the interaction zone of polymer matrix and nanofiller; the characterization methods of nanocomposites are also presented. Furthermore, the remarkable findings in the fields of epoxy, cross-linked polyethylene (XLPE), polypropylene and polyvinyl chloride (PVC) nanocomposites are reviewed. In this study, it was observed that there is lack of comparison between results of lab scale specimens and actual field aged cables. Also, non-standardization of the preparation methods and processing parameters lead to changes in the polymer structure and its surface degradation. However, on the positive side, recent attempt of 250 kV XLPE nanocomposite HVDC cables in service may deliver a promising performance in the coming years. Moreover, materials such as self-healing polymer nanocomposites may emerge as substitutes to traditional insulations.

show abstract

Effect of Particle Size and Dispersion on Dielectric Properties in ZnO/Epoxy Resin Composites

Cited by 25 publications

References 14 publications

Effect of Preparation Method on the Particles Size, Dielectric Constant and Antibacterial Properties of ZnO Nanoparticles and Thin Film of ZnO/Chitosan

Effect of Preparation Method on the Particles Size, Dielectric Constant and Antibacterial Properties of ZnO Nanoparticles and Thin Film of ZnO/Chitosan

Investigation on relationship between breakdown strength enhancement of composites and dielectric characteristics of nanoparticle

A Review on Nanocomposite Based Electrical Insulations

Contact Info

Product

Resources

About