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Hollow titanium dioxide white electrophoresis ion for electrophoresis displaying and preparing method thereof

A titanium dioxide, electrophoretic display technology, applied in chemical instruments and methods, dyed polymer organic compound processing, optics, etc., to achieve the effects of easy availability of raw materials, uniform size, and simple preparation process

Active Publication Date: 2008-07-02
TIANJIN UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a white hollow electrophoretic particle used for electronic paper display and its preparation method, such as regular spherical particles, prepared as hollow particles to effectively reduce the relative density of particles, so as to overcome the disadvantages of electrophoretic particles prepared by traditional methods. defect

Method used

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  • Hollow titanium dioxide white electrophoresis ion for electrophoresis displaying and preparing method thereof

Examples

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Effect test

example 1

[0012] ① Disperse 0.10g of methyl methacrylate hollow polymer microspheres in 95mL of absolute ethanol, add 5.10g of titanate and 0.90g of deionized water, stir for 30min, and stand to obtain a white powder, which is a spherical hollow polymer / titanium dioxide Composite particles.

[0013] ②The hollow polymer / titanium dioxide composite particles were calcined at 1000°C for 5 hours in the air atmosphere to obtain white hollow titanium dioxide spherical particles with a uniform particle size of about 180nm and a relative density of 1.36g / cm 3 .

example 2

[0015] ① Take 0.25g of ethyl methacrylate polymer hollow microspheres and disperse them in 95mL of absolute ethanol, add 2.98g of titanate and 0.16g of deionized water, stir for 30min, and let stand to obtain a white powder, which is a spherical hollow polymer / Titanium dioxide composite particles.

[0016] ②The prepared white hollow polymer / titanium dioxide composite particles were calcined in air atmosphere at 900°C for 5 hours to obtain white hollow titanium dioxide spherical particles with a uniform particle size of about 320nm and a relative density of 2.04g / cm 3 .

example 3

[0018] ① Disperse 0.17 g of polystyrene hollow microspheres in 95 mL of absolute ethanol, add 4.30 g of titanate and 0.90 g of deionized water, stir for 30 min, and let stand to obtain a white powder, which is a spherical hollow polymer / titanium dioxide composite particle.

[0019] ③ The prepared white hollow polymer / titanium dioxide composite particles were calcined in air atmosphere at 900°C for 5 hours to obtain white hollow titanium dioxide spherical particles with a uniform particle size of about 180nm and a relative density of 1.84g / cm 3 .

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Abstract

The invention provides a preparation method for white hollow titanic oxide microsphere. Hollow microsphere of a crylic acid polymer or of a styrene polymer is taken as a seed and an outer layer of the hollow microsphere is wrapped with titanyl hydrate; after being dried, the seed wrapped with titanyl hydrate is baked at the high temperature so as to prepare the titanic oxide microsphere with hollow structure. The white oxide has the spherical diameter of 40 nanometers to 450 nanometers, relative density of 1.0 to 3.1g / cm<3> and specific surface of 40 to 95m<2> / g. The titanic oxide microsphere prepared by the invention has a regular shape, a glabrous surface and an even size and diameter of particles is easily controlled. The invention also has the advantages that the preparation process of the method is simple and the raw materials are easily obtained.

Description

technical field [0001] The invention relates to the technology of electrophoretic particles, in particular to a hollow titanium dioxide white electrophoretic particle for electrophoretic display and a preparation method thereof, which is applied to the preparation of white hollow 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 no...

Claims

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Application Information

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IPC IPC(8): C09C3/10C09C3/00C09C1/36G02F1/167
Inventor 王世荣王彩艳李祥高
Owner TIANJIN UNIV
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