Promising Characteristics of Nanocomposite Dielectrics

Abstract

Polymer nanocomposites possess promising high performances as engineering materials, if they are prepared and fabricated properly. It was also clarified that they could provide favorable performances as dielectrics and electrical insulation. Comprehensive reviews were given in literatures by the author firstly in 2004 and secondly in 2005. This review is based on the second paper and covers recent significant findings. It also utilizes a recently proposed multi-core model, i.e. a fine structure of "interaction zone" in order to explain various phenomena associated with nanocomposites.

Role of interfacial surface area on the physical phenomena of nanocomposites

“…The theoretical investigations in this Letter indicate the importance of filler dispersion. It is mathematically shown that the ISA shows exactly similar characteristics as the observed physical phenomena [1–16, 20], supporting the role of ISA in the material properties of nanocomposites.…”

“…As can be seen from the above Figures, both ISA and interparticle distance tend towards improvement with increasing filler content. However, experimental results indicate that the improvements in material properties tend to saturate with increasing filler content [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]20]. The reason for this may be understood in the light of the fact that the results shown in Figs.…”

“…The interfacial surface achieved with the 25 nm nominal size is in the order of a few km 2 per 1 m 3 . This enormous amount of surface area is believed to result in a phenomenal increase in the volume resistivity and the breakdown strength of materials [1–16]. The nanocomposites can achieve about 100 times higher ISA than the microcomposites.…”

“…Introduction: Dielectric polymer nanocomposites are being considered to be the state-of-the-art materials for electrical insulation. Several improvements in the material properties have been reported recently [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Although the macroscopic improvements are encouraging their application, understanding the mesoscopic or nanoscopic phenomena is found to be essential for deciding a more suitable filler material and/or optimum filler content for a given filler.…”

Improvement of Electrical and Thermal Characteristics of Nano-Micro Epoxy Composite

“…Therefore, many studies have been focused on developing new materials with superior strength and attributes. Among these, the development of materials using the concept of composite materials has long been of much interest [1].…”