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Electrophoresis particle of polymer dye (pigment) for electronic ink and preparation method thereof

A technology of electrophoretic particles and electronic ink, which is applied in the direction of organic dyes, inks, applications, etc., can solve the problems of poor movement effect and uneven shape of organic pigment particles, and achieve the advantages of overcoming uneven shape, bright colors, and easy availability of raw materials Effect

Inactive Publication Date: 2009-09-30
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The prepared colored electrophoretic particles have a uniform particle size. The electrophoretic particles of organic polymer dyes (pigments) not only maintain the advantages of bright colors and appropriate density of organic pigments, but also overcome the uneven shape of organic pigment particles and the influence of electric field. Under the disadvantage of poor movement effect in dispersion liquid

Method used

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  • Electrophoresis particle of polymer dye (pigment) for electronic ink and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0017] Dissolve 1.0g of Disperse Orange GR (C.I.Disperse Orange 3) in 50mL of dichloromethane, add 3g of acryloyl chloride to the dichloromethane solution of the above dye at a rate of 30 drops / min under the reaction condition of 0°C In the closed flask, stir at 500r / min, after the dropwise addition of acryloyl chloride, raise the temperature to 20°C, and continue stirring for 0.5 hours to prepare a dye solution with polymerizable functional groups;

[0018] The solution prepared in the above steps was washed twice with 0.5M NaOH and HCl solution respectively, and then washed with water for 3 times, and the dichloromethane solvent was evaporated to obtain 0.8 g of the corresponding pigment powder with polymerizable functional groups;

[0019] Take 1g of the pigment prepared in the above steps, dissolve it in 100mL of ethanol, add 5g of styrene, 0.5g of divinylbenzene, and 0.01g of initiator AIBN under the conditions of 80°C and 200r / min, react for 7h under the protection of nit...

example 2

[0021] Dissolve 1.0g of Disperse Red RLZ (C.I.Disperse Red 4) in 50mL of dichloromethane, add 1g of acryloyl chloride to the dichloromethane solution of the above dye at a rate of 40 drops / min under the reaction condition of 0°C In the closed flask, stir at 650r / min, after the dropwise addition of acryloyl chloride, raise the temperature to 10°C, and continue stirring for 1.5 hours to prepare a dye solution with polymerizable functional groups;

[0022] The solution prepared in the above steps was washed twice with 0.5M NaOH and HCl solution respectively, and then washed with water for 3 times, and the dichloromethane solvent was evaporated to obtain 0.9 g of the corresponding pigment powder with polymerizable functional groups;

[0023] Take 1g of the pigment prepared in the above steps, dissolve it in 100mL of ethanol, add 1g of styrene, 0.5g of divinylbenzene, and 0.05g of initiator AIBN under the conditions of 70°C and 300r / min, react for 9h under nitrogen protection, and c...

example 3

[0025] Dissolve 1.0g of disperse violet (C.I.Disperse Red 11) in 50mL of dichloromethane, add 3g of acryloyl chloride to the airtight container of the above-mentioned dye in dichloromethane at a rate of 50 drops / min under the reaction condition of 0°C. In the flask, stir at 600r / min, after the dropwise addition of acryloyl chloride, raise the temperature to 15°C, and continue to stir for 2 hours to prepare a dye solution with polymerizable functional groups;

[0026] The solution prepared in the above steps was washed twice with 0.5M NaOH and HCl solution respectively, and then washed with water for 3 times, and the dichloromethane solvent was evaporated to obtain 0.9 g of the corresponding pigment powder with polymerizable functional groups;

[0027] Take 1g of the pigment prepared in the above steps, dissolve it in 100mL of ethanol, add 3g of styrene, 0.5g of divinylbenzene, and 0.02g of initiator AIBN under the conditions of 65oC and 200r / min, react for 7h under the protecti...

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Abstract

The invention relates to an electrophoresis particle of polymer dye (pigment) for electronic ink and a preparation method thereof, and belongs to technology of electrophoresis particle preparation. The electrophoresis particle uses dye as an initial raw material, and is prepared according to the following proportion that: the mass ratio of the dye to acryloyl chloride is 1:1-10; the mass ratio of the dye to styrene is 1:1-20; the mass ratio of the dye to divinylbenzene is 1:0.5-10; and the mass ratio of the dye to an initiator AIBN is 1:0.01-0.05. The preparation method comprises the following steps: carrying out functionalized modification on dye acidylation by acryloyl chloride in methylene dichloride to lead the dye to carry a polymerizable functional group; then, leading the dye to perform a polymerization reaction with styrene in ethanol for 4 to 12 hours by taking AIBN as the initiator and the divinylbenzene as a cross-linking agent to prepare the particle with particle diameter of between 200 and 300nm. The electrophoresis particle and the preparation method have the advantages of simple process, accessible raw materials, even particle diameter of the prepared colorful electrophoresis particle and good degree of sphericity. The electrophoresis particle of the organic polymer dye (pigment) not only maintains the advantages of bright color and proper density of the organic dye, but also overcomes the defects uneven shape of the organic dye particle, poor movement effect in disperse liquid under the action of an electric field.

Description

technical field [0001] The invention relates to an electrophoretic particle used for a polymer dye (pigment) of electronic ink and a preparation method thereof, belonging to the electrophoretic particle preparation technology. Background technique [0002] Electronic ink is a basic material used in electrophoretic display, which is composed of charged particles and dispersion medium. In the past, colored electrophoretic particles were prepared by dispersing pigments, charge control agents, stabilizers, etc. in the medium, and preparing them by physical methods such as grinding, ball milling, and ultrasonication. However, the color electrophoretic particles prepared by this method have a wide particle size distribution and irregular shapes, which affect the display quality of the electronic ink. [0003] In order to overcome the defects of traditional methods, Dong-Guk Yu et al. invented the method of polymer-coated dyes to prepare color electrophoretic particles [1, 2] [Don...

Claims

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Application Information

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IPC IPC(8): C09B69/10C09D11/00G02F1/167
Inventor 冯亚青段继海李祥高温自强徐文亮
Owner TIANJIN UNIV
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