Abstract
Abstract Coating of ZnO/resin composite films has been investigated by optical microscopy, scanning electron microscopy and electromeasurement. Poly(vinyl chloride)/poly(methyl methacrylate) lacquer mixed with either needle-like (N-) or tetrapod-like (T-) ZnO particles is spread in a 200 μm thick layer on a glass sheet. Benard convection occurs in the coating. N-ZnO particles flow along the convection streams, and are then dispersively fixed within the cells but not at the boundaries. On the other hand, T-ZnO particles aggregate in rings along the boundaries of Benard cells. While the lacquer dries and solidifies, the rings of the T-ZnO particles are broken down into two or three pieces, and form a network structure by meeting and parting among them. The T-ZnO/resin composite films have a surface resistivity of 106 Ω/square or less, and provide a good electrostatic dissipative coating.
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