Hollow titanium oxide high colour electrophoresis particle for electrophoresis display and preparation thereof

A dark color electrophoresis and electrophoretic display technology, which is applied in the preparation of titanium dioxide, titanium oxide/hydroxide, and microspheres, to achieve the effects of easy control of particle size, regular shape, and simple preparation process

Inactive Publication Date: 2008-10-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a hollow titanium oxide dark electrophoretic particle for electrophoretic display and its preparation method, which can overcome the defects of traditional methods

Method used

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  • Hollow titanium oxide high colour electrophoresis particle for electrophoresis display and preparation thereof

Examples

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Effect test

example 1

[0013] ① Disperse 0.10 g of methyl methacrylate polymer hollow microspheres in 95 mL of absolute ethanol, add 0.90 g of deionized water, stir, and react at 40 °C for 30 min. Stand still in an oven at 70°C for 96 hours to obtain a white powder, which is a spherical hollow polymer / titanium dioxide composite particle.

[0014] ②The prepared white hollow polymer / titanium dioxide composite particles were calcined at 1000°C for 5 hours in an ammonia atmosphere to obtain black hollow TiO spherical particles with a particle size of 170nm and a relative density of 1.77g / cm 3 .

example 2

[0016] ① Disperse 0.20g of polystyrene hollow microspheres in 90mL of absolute ethanol, add 1.03g of deionized water, stir, react at 40°C for 30min, and stand in an oven at 70°C for 96h to obtain a white powder, which is a spherical hollow polymer / Titanium dioxide composite particles.

[0017] ②The prepared white hollow polymer / titanium dioxide composite particles were calcined at 600°C for 3 hours in a hydrogen atmosphere to obtain blue-black hollow TiO2 particles. 0.93 Spherical particles with a uniform particle size of 215nm and a relative density of 1.59g / cm 3 .

example 3

[0019] ① Disperse 0.50g of ethyl methacrylate polymer hollow microspheres in 90mL of absolute ethanol, add 1.03g of deionized water, stir, react at 40°C for 30min, and stand in an oven at 80°C for 96h to obtain a white powder, which is spherical Hollow polymer / titanium dioxide composite particles.

[0020] ②The prepared white hollow polymer / titanium dioxide composite particles were calcined at 800°C for 4 hours in an ammonia atmosphere to obtain purple-black hollow TiO2 particles. 0.97 Spherical particles with a uniform particle size of 253nm and a relative density of 1.71g / cm 3 .

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Abstract

The invention relates to a hollow titania high color particle electrophoresis used for electrophoretic display and a preparation method thereof, which uses hollow microballoons of acrylate copolymer or styrene polymer as the seeds with the outer layer coated with titanyl hydrate and prepares the corresponding polymer/titanium dioxide microballoons after drying and baking; then TiOx (x is more than 0 and less than 2) microballoon with hollow structure and different colors are acquired by high temperature baking in amine gas, hydrogen gas or argon gas with the relative density of 1.2 to 2.1g/cm<3>, the specific surface ranging from 35 to 95m<2>/g, the outside diameter ranging from 40 to 450nm, the inside diameter ranging from 0 to 300nm and the ratio between the external diameter and the internal diameter ranging from 1:4 to 1:1.6. The hollow titania spherical particle prepared by the invention is characterized by regular shape, smooth surface, even size and easy control of particle diameter, besides, the method also has the advantages of simple preparation process and easy acquired raw materials.

Description

technical field [0001] The invention relates to the technology of electrophoretic particles, in particular to a hollow titanium oxide dark electrophoretic particle for electrophoretic display and a preparation method thereof, which is applied to the preparation of dark electrophoretic particles in microcapsule electrophoretic display electronic paper. technical background [0002] Microcapsule electrophoretic display is the main direction of electronic paper research at present. It uses microcapsules to coat the electrophoretic display liquid composed of electrophoretic particles, suspension, charge control agent and stabilizer, etc., and uses the electrophoretic particles to be affected by the electric field in the colored suspension. Electrophoretic migration occurs to show. The traditional method of preparing titanium dioxide electrophoretic particles is to modify the surface of pigment particles with surfactants (anionic surfactants, cationic surfactants or nonionic surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/04C01G23/047C09C1/36G02F1/167
Inventor 王世荣王彩艳李祥高
Owner TIANJIN UNIV
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