Surface modification of inorganic black particles for electrophoretic display

Inorganic black particles (Black 444) were modified with poly(methyl methacrylate) as a shell material by using dispersion polymerization to improve their dispersion stability in a medium oil for electrophoretic display applications. They were also positively charged with vinylimidazole to enhance t...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2014, 65(10), , pp.1520-1523
Main Authors: Kim, Sang Deuk, Ahn, Woo Jin, Choi, Hyoung Jin
Format: Article
Language:English
Subjects:
Mathematical and Computational Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Theoretical
물리학
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Summary:Inorganic black particles (Black 444) were modified with poly(methyl methacrylate) as a shell material by using dispersion polymerization to improve their dispersion stability in a medium oil for electrophoretic display applications. They were also positively charged with vinylimidazole to enhance their electrophoretic mobility. The morphology and the shape of the composite particles were characterized by using scanning electron microscopy. The thermal properties and the chemical structure of the samples were examined by using thermogravimetric analysis and Fourier-transform infrared spectroscopy, respectively. In addition, the electrophoretic mobility and the zeta-potential of the black444/PMMA/vinylimidazole particles in a dielectric fluid were measured by using optical microscopy and electrophoretic light scattering. With increasing positive charge, the black444/PMMA/vinylimidazole particles showed improved electrophoretic characteristics compared to pristine Black 444.
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.65.1520