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Jae-Jun Park - IEEE Xplore Author Profile

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Hydrophilic surface of fumed nanosilica was treated with a trimethylsilane coupling agent to achieve its hydrophobic surface, and the surface modification was confirmed by thermogravimetric weight loss and increasing contact angle of water droplet. The effects of the surface-modified nanosilica content on the electrical and mechanical properties of epoxy nanocomposites were studied to apply to the...Show More
The surface of micro-silica and nano-silica was modified with epoxy-modified silicone and their effect on the electrical breakdown strength was evaluated in epoxy/micro-/nano-silica composites (EMNCs). Firstly, the surface of micro- and nano-silica was treated with hydroxyl silane and then the hydroxyl group of the silane was reacted with epoxy-modified silicone. The surface-treated micro- and nan...Show More
In order to develop a new insulation material for heavy electric equipments, epoxy/micro- and nano- composites (EMNC) were prepared by mixing a micro-sized silica with a nano-sized layered silicate, where the latter had been pre-prepared by our electric field dispersion process in the following ac electric field condition; (1) interelectrode distance: 40 mm, (2) application voltage: 11 kV, (3) fre...Show More
A new electric application method was developed to prepare epoxy/organoclay nanocomposite for the electrical insulation in the ac electric fields and it could be also used in the field of various viscous polymer/organoclay systems. The applied ac electric field condition was as follows; (1) inter-electrode distance: 40 mm, (2) application voltage: 3-11 kV, (3) frequency: 60-1,000 Hz, and (4) appli...Show More