Fabrication of charged particles for electrophoretic display

Park, Lee Soon; Park, Jin Woo; Choi, Hae Yun; Han, Yoon Soo; Kwon, Yong Hoon; Choi, Hyung Yun

doi:10.1016/j.cap.2005.04.012

Cited by 45 publications

(11 citation statements)

References 4 publications

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“…[5][6][7] In this paper, we will describe the details of our new procedures to modify the micro-hydrogel particles surfaces and report the analysis results of their electro-responsive behaviors. We believe that our results should significantly affect the electronic ink industry because alginate hydrogels do include various kinds of colored ink and can advance the contrast of electronic paper due to their softness.…”

Section: Introductionmentioning

confidence: 99%

Preparation methods of alginate micro-hydrogel particles and evaluation of their electrophoresis behavior for possible electronic paper ink application

Kaneko

Shimoda

et al. 2010

Polym J

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For the purpose of an electronic paper application, alginate/Ca hydrogel particles having a diameter of a few micrometers used with Titanium Black (TB), which has a diameter of B1 lm, for visualization purposes were prepared by mixing an aqueous sodium alginate solution with TB into an aqueous CaCl 2 solution. In order to increase their absolute zeta potential |f| for demonstrating good electric responsive behavior, micro-hydrogel particles were rinsed instantaneously by different concentrations of Na 2 CO 3 solution. Through this procedure, the absolute value of the zeta potential |f| in pure water increased from |f|¼1.3 mV for the minimum value to |f|¼73 mV for the maximum value with an upon increasing Na 2 CO 3 concentration. Micro-hydrogel particles were set between electrodes in pure water, their electro-responsive behavior was examined under an applied electric field and their position was analyzed using an optical microscopy. It was found that micro-hydrogel particles with a high absolute zeta potential |f| could oscillate from the anode to the cathode with a corresponding frequency, and threshold absolute zeta potential |f| was found to be between 1.3 and 39 mV.

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Section: Introductionmentioning

confidence: 99%

Preparation methods of alginate micro-hydrogel particles and evaluation of their electrophoresis behavior for possible electronic paper ink application

Kaneko

Shimoda

et al. 2010

Polym J

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“…Kim et al used laser printer toner particles modified with wax materials to fabricate colored microcapsules containing cyanewhite, magentaewhite and yellowewhite pigment pairs [6]. However, the weakness of inorganic [7,8] and polymer particles [9] in chroma and light reflectance was known to influence the color saturation of display. The organic pigments, on the other hand, have merit of excellent optical properties such as good brilliance, color strength and transparence, and therefore can offer great potential in the context of electronic, optical and photoelectric devices.…”

Section: Introductionmentioning

confidence: 96%

Surface modification of organic pigment particles for microencapsulated electrophoretic displays

Wen

Feng

et al. 2012

Dyes and Pigments

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“…Furthermore, polymers on the modified particles should not cause any reduction in the electrophoretic mobility of the particles. 4,5 However, when the particles are coated with an organic material, such as a wax, it has been found that the interaction between the coating material and the TiO 2 surface is not strong enough and the coating material may separate from the surface of the pigment in some situations. Thus, it is commonly accepted that the coating layer must be chemically bonded to the particles.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Polymer-Coated TiO<sub>2</sub> Particles for Electronic Paper Based on Electrophoresis

Wang¹,

Kitamura²,

Miyagawa³

et al. 2010

jist

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The preparation and characterization of TiO 2 particles coated with an electrophoretic polymer using silane coupling agents and highly hydrophilic monomers (methyl methacrylate) are presented in this article. The organic layer was formed by radical polymerization and bonded to the surface of inorganic TiO 2 with a silane coupling agent. The polymer-coated particles were characterized by Fourier transform infrared spectrometry, field emission scanning electron microscopy, and thermogravimetric analysis. The size distribution and charge properties of the polymer-coated particles were measured, and the optical response of electrophoretic image display cells, containing the particles, was also investigated. It was found that coating materials having a branched alkyl side chain structure endowed the final polymer-coated particles with good stability and favorable electrophoretic properties in an electrophoretic medium. In addition, the charge polarity of the polymer-coated particles could be controlled using different silanizing reagents and polymers. Furthermore, electrophoretic image display cells, containing such particles, demonstrated good response and high reflectance in their white state.

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Fabrication of charged particles for electrophoretic display

Cited by 45 publications

References 4 publications

Preparation methods of alginate micro-hydrogel particles and evaluation of their electrophoresis behavior for possible electronic paper ink application

Preparation methods of alginate micro-hydrogel particles and evaluation of their electrophoresis behavior for possible electronic paper ink application

Surface modification of organic pigment particles for microencapsulated electrophoretic displays

Preparation of Polymer-Coated TiO<sub>2</sub> Particles for Electronic Paper Based on Electrophoresis

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