Preparation, microstructure and properties of polyethylene aluminum nanocomposite dielectrics

Huang, Xingyi; Jiang, Pingkai; Kim, Chonung; Ke, Qingquan; Wang, Genlin

doi:10.1016/j.compscitech.2008.03.009

Cited by 54 publications

(32 citation statements)

References 15 publications

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“…Young's modulus of the composites was determined by the contradiction between the stiffening effect of the rigid particles and the weakening effect of the soft interlayer. 23,24 The above result revealed that the soft interlayer did not mask the stiffness of the filler particles in the lower loading region, but masked the stiffness of the filler particles in the higher loading region to some extent.…”

Section: Resultsmentioning

confidence: 71%

Effect of nanosized mesoporous MCM-41 (with template) material on properties of natural rubber nanocomposites

Wang

Zhang

et al. 2011

Plastics, Rubber and Composites

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Mesoporous mobil composition of matter 41 (MCM-41) (with template) was used directly as a new filler for naural rubber (NR). Inside the pore chanels, and on the outer surface of the MCM-41 particle, were cationic surfactant CTAB and Pluronic F 127 (molecular weight 5 11 500) mixture. Results showed that the tensile properties and the thermal stability of NR/mesoporous MCM-41 (with template) nanocomposite were improved at low filler loading as compared with those of NR compound. Scanning electron microscopy observations revealed that enhancement of the interface was obtained by adding MCM-41 (with template).

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Section: Resultsmentioning

confidence: 71%

Effect of nanosized mesoporous MCM-41 (with template) material on properties of natural rubber nanocomposites

Wang

Zhang

et al. 2011

Plastics, Rubber and Composites

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“…At high aluminum content such as 48 vol %, the composite still possessed a high dielectric strength of 6.0 kV/mm, compared to other commonly used metals/polymers. The reasons may be attributed to the following factors: (1) the used aluminum particle has a passivated oxide layer (a kind of insulating layer) around its aluminum core, which can act as an electrical barrier governing the tunneling current between the neighboring aluminum cores and (2) the apparent contact resistance may be found between aluminum particles at high content because of undesirable voids that make it impossible for complete contact between the particles to be realized 34. Additionally, the highest aluminum content in this study still did not reach the percolative threshold point because of no dielectric singularity observed in this study.…”

Section: Resultsmentioning

confidence: 99%

“…It is worth noting that the aluminum/epoxy composites at 48 vol % aluminum content still possessed good dielectric breakdown strength characteristics, which is of a great significance for practical application 34…”

Section: Resultsmentioning

confidence: 99%

Thermal and dielectric properties of the aluminum particle/epoxy resin composites

Zhou

2010

J of Applied Polymer Sci

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Microsized aluminum/epoxy resin composites were prepared, and the thermal and dielectric properties of the composites were investigated in terms of composition, aluminum particle sizes, frequency, and temperature. The results showed that the introduction of aluminum particles to the composites hardly influenced the thermal stability behavior, and decreased T g of the epoxy resin; moreover, the size, concentration, and surface modification of aluminum particles had an effect on their thermal conductivity and dielectric properties. The dielectric permittivity increased smoothly with a rise of aluminum particle content, as well as with a decrease in frequency at high loading with aluminum particles. While the dissipation factor value increased slightly with an increase in frequency, it still remained at a low level. The dielectric permittivity and loss increased with temperature, owing to the segmental mobility of the polymer molecules. We found that the aluminum/epoxy composite containing 48 vol % aluminum-particle content possessed a high thermal conductivity and a high dielectric permittivity, but a low loss factor, a low electric conductivity, and a higher breakdown voltage.

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“…The permittivity of the sample does not vary significantly across the frequency range studied prior to water immersion. In the low frequency range, the slightly higher dielectric loss of the sample is possibly associated with Maxwell-Wagner-Sillars (MWS) interfacial polarisation, where the frequency dependent contributions to dielectric response may come from charge build-up at the nanoparticle interfaces [6]. With increased water absorption, the permittivity increases and the loss peak shifts to higher frequencies.…”

Section: B Characterizationmentioning

confidence: 98%

Dielectric response of polyethylene nanocomposites: The effect of surface treatment and water absorption

Lau

Vaughan

Chen

et al. 2012

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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The potential of polymer nanocomposites as dielectric materials is an active area of research, due to the promising electrical properties that may result from nanostructuration. Recently, the effect of water absorption in nanocomposites has been considered and it is found that nanocomposites can absorb significantly more water than the equivalent unfilled polymer when exposed to humid environmental conditions. This is due, supposedly, to the presence of the nanoparticle-matrix interface, which could be a preferred location for the aggregation of water molecules. Nevertheless, from an application perspective, the presence of water is not welcomed as it might negatively affect the overall electrical properties. This paper reports on a dielectric spectroscopy investigation into polyethylene systems that contain different amounts of nanosilica with different surface chemistries. Results indicate that the permittivity and loss tangent of nanocomposites are higher than that of the unfilled polyethylene, especially in the low frequency range. Furthermore, water absorption tests show that nanocomposites do absorbed significantly more water than unfilled polyethylene, with the consequence that both the permittivity and loss tangent increase with increasing amounts of water. However, appropriate surface treatment of nanosilica was found to reduce the water absorption effect and to modify the dielectric response of nanocomposites compared with those containing untreated nanosilica. While water absorption may not be a technologically desirable characteristic, our results suggest that water molecules can act as effective dielectric probes of important factors.

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Preparation, microstructure and properties of polyethylene aluminum nanocomposite dielectrics

Cited by 54 publications

References 15 publications

Effect of nanosized mesoporous MCM-41 (with template) material on properties of natural rubber nanocomposites

Effect of nanosized mesoporous MCM-41 (with template) material on properties of natural rubber nanocomposites

Thermal and dielectric properties of the aluminum particle/epoxy resin composites

Dielectric response of polyethylene nanocomposites: The effect of surface treatment and water absorption

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