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Article: Optimum particle size of titanium dioxide and zinc oxide for attenuation of ultraviolet radiation.
- Article from:
- The Journal of Coatings Technology
- Article date:
- October 1, 1990
- Author:
CopyrightCOPYRIGHT 1990 Federation of Societies for Coatings Technology. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Optimum Particle Size Of Titanium Dioxide and Zinc Oxide For Attenuation of Ultraviolet Radiation
The optimum size of particles used to protect polymers from ultraviolet radiation is calculated using a theoretical model for light scattering and absorption. Titanium dioxide and zinc oxide, two common ultraviolet-attenuating materials, are examined in this work.
The optimum size for spherical titanium dioxide particles is well-defined, and varies uniformly from 0.05 micrometer for 0.3-micrometer ultraviolet radiation to 0.12 micrometer for 0.4-micrometer radiation, respectively. For zinc oxide the optimum is less distinct. In general, particles with a diameter ...