Journal of Optoelectronics and Advanced Materials, Volume 14, Issue 5-6, Pages 441-447 , 01/01/2012

Sono-synthesized sword-like zinc oxide and its use as a filler in polyurethane composites

C. Pholnak, C. Sirisathitkul, S. Danworaphong, D. J. Harding

Abstract

Zinc oxide (ZnO) particles with sword-like morphology were sonochemically synthesized from Zn(NO<inf>3</inf>)<inf>2</inf>?C<inf>6</inf>H <inf>12</inf>N<inf>4</inf> aqueous solutions at 90°C. After the crystal growth, the ultrasonic irradiation facilitates the erosion process at the ends of hexagonal ZnO rods resulting in a sword-like morphology and reduces the overall crystal size. Increasing the ratio of C<inf>6</inf>H<inf>12</inf>N <inf>4</inf> to Zn(NO<inf>3</inf>)<inf>2</inf> from 1:2 to 5:1 increases the density of sword-like ZnO clusters. An extra absorption peak in the ultraviolet (UV) regime is observed in commercial polyurethane loaded with the surface modified ZnO. The dispersion of 15 wt% ZnO gives rise to a stronger UV absorption than that by 5 wt% ZnO.

Document Type

Article

Source Type

Journal

Keywords

Polyurethane compositesSonochemical synthesisUltraviolet absorptionZinc oxide

ASJC Subject Area

Materials Science : Electronic, Optical and Magnetic MaterialsPhysics and Astronomy : Condensed Matter PhysicsPhysics and Astronomy : Atomic and Molecular Physics, and OpticsEngineering : Electrical and Electronic Engineering

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Pholnak, C., Sirisathitkul, C., Danworaphong, S., & Harding, D. (2012). Sono-synthesized sword-like zinc oxide and its use as a filler in polyurethane composites. Journal of Optoelectronics and Advanced Materials, 14(5-6) 441-447.

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