Synthesis and Characterization of Surface Modification of TiO2 Nanoparticles for Electrophoretic Display

Yu Bai; Shu Xian Meng; Ya Qing Feng

doi:10.4028/www.scientific.net/AMR.361-363.1960

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 361-363Synthesis and Characterization of Surface...

Synthesis and Characterization of Surface Modification of TiO₂ Nanoparticles for Electrophoretic Display

Abstract:

TiO2 and carbon black inorganic pigments having opposite charges have been typically used for white and black image in the electronic ink display technique, respectively. However, since TiO₂ has a relatively high density, the density mismatch between nanoparticles and the dielectric medium causes severe sedimentation problem in the suspended media. In order to change its surface from hydrophilic to hydrophobic and lower its density, TiO₂ was grafted by γ-Methacryloxypropyl trimethoxy silane (KH570), and then coated with poly(methyl methacrylate) (PMMA) via a dispersion polymerization method prior to being used for an electronic ink material. In order to improve their mobility, a charge control agent was also added to the suspension of synthesized nanoparticles in the dielectric medium. The KH570-grafted TiO₂ nanoparticles and the TiO₂/KH570/PMMA nanoparticles were characterized by fourier transform-infrared spectroscopy (FT-IR), field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Density of TiO₂/KH570/PMMA nanoparticles was found to be decreased. Thermal properties of the composite particles were analyzed by thermogravimetric analysis (TGA).

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Advanced Materials Research (Volumes 361-363)

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1960-1964

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.361-363.1960

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Online since:

October 2011

Authors:

Yu Bai, Shu Xian Meng, Ya Qing Feng

Keywords:

Core-Shell Structure, Electrophoretic Display, Poly(methyl methacrylate) (PMMA), Silane Coupling Agent, TiO₂ Pigment Particle

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