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Preparation method of colourful electrophoresis disclosing solution for electronic ink display

A technology of color electrophoresis and electronic ink, which is applied in the field of preparation of color electrophoretic display liquid, can solve the problems of inconspicuous color contrast, easy sedimentation of electrophoretic particles, long response time, etc., and achieves easy separation process, simple and easy preparation process, low cost effect

Inactive Publication Date: 2009-10-07
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, when the electrophoretic particles are dispersed in the electrophoretic display liquid, there are problems: 1. The electrophoretic particles are easy to settle in the electrophoretic display liquid; 2. The particle size is large and uneven, so that the response time is long and the color contrast is not good. obvious

Method used

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  • Preparation method of colourful electrophoresis disclosing solution for electronic ink display
  • Preparation method of colourful electrophoresis disclosing solution for electronic ink display
  • Preparation method of colourful electrophoresis disclosing solution for electronic ink display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Weigh 0.03g of toluidine red and dissolve in 10mL of absolute ethanol;

[0037] (2) Weigh 0.05g of sodium dodecyl sulfate (SDS) into 200mL of deionized water, stir magnetically for 20min, and add it into a 250mL three-necked flask after being dissolved. Control stirring speed to be 600rpm, start to stir.

[0038] (3) Add the toluidine red-ethanol solution in (1) dropwise to the three-necked flask in (2) at room temperature and under stirring conditions for recrystallization and modification, and react for 20 minutes.

[0039] (4) Add 10 mL of tetrachlorethylene to the suspension in (3) above, continue to stir for 10 minutes, and then let it stand for 10 minutes. The toluidine red is extracted into the tetrachlorethylene, and the layers are separated, and the lower layer is removed. That is, the modified toluidine red-tetrachloroethylene suspension is obtained.

[0040] (5) Add 0.02g hyperdispersant CH-6 to the lower layer solution obtained in (4), stir magneticall...

Embodiment 2

[0044] (1) Weigh 0.05g of toluidine red and dissolve in 10mL of tetrahydrofuran;

[0045] (2) Measure 1mL of Span-80 (mass 1.1g) into 200mL of deionized water, stir magnetically for 20min, and add to a 250mL three-neck flask after dissolution. Control stirring speed to be 900rpm, start to stir.

[0046] (3) Add the toluidine red-tetrahydrofuran solution in (1) dropwise to the three-neck flask in (2) at room temperature and under stirring conditions for recrystallization and modification, and react for 15 minutes.

[0047] (4) Add 8mL tetrachlorethylene and 2.5mL cyclohexane to the suspension of the above (3) as a compound dispersion medium, continue to stir for 10min, then stand for 10min, the toluidine red is extracted into the compound system, To layer, remove layers. That is, the modified toluidine red-tetrachloroethylene / cyclohexane suspension is obtained.

[0048] (5) Add 0.05 g of dispersant UV681 to the lower layer solution obtained in (4), stir magnetically for 30 m...

Embodiment 3

[0052] (1) Weigh 0.03g of toluidine red, dissolve it in 5mL of concentrated sulfuric acid (mass concentration is 98%), and stir it with a glass rod to fully dissolve it;

[0053] (2) Measure 100 mL of deionized water as an anti-solvent, measure 1 mL of alkyl hydroxamic acid (0.75 g in mass) and add it to 2 mL of ethanol. Add to a 250mL three-neck flask. Control stirring speed to be 800rpm, start to stir.

[0054] (3) Add the toluidine red-concentrated sulfuric acid solution in (1) dropwise to the three-necked flask in (2) at room temperature and under stirring conditions for recrystallization and modification, and react for 20 minutes.

[0055] (4) Add 8 mL of carbon tetrachloride to the suspension in (3) above, continue to stir for 10 minutes, then let it stand for 10 minutes, the toluidine red is extracted into the carbon tetrachloride, separate the layers, and remove the lower layer. That is, the modified toluidine red-carbon tetrachloride suspension is obtained.

[0056...

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Abstract

The present invention relates to a preparation method of colorful electrophoresis disclosing solution for electronic ink display. Using anti-solvent re-crystallization method to proceed re-crystallization on coloring agent to get coloring agent particle small particle diameter, simultaneity in the re-crystallization process, adding modifying agent to improve dispersion stabilization of particles and improve charge properties. Particle diameter of the prepared electrophoresis particles can reach 50 nm-300 nm, and colorful electrophoresis solution prepared by using the coloring agent particles has excellent dispersancy and charge properties, which can be used in electronic ink display and can also be used as raw materials for preparing electronic ink microcapsule capsule-core.

Description

Technical field: [0001] The invention relates to a preparation method of a color electrophoretic display liquid used for electronic ink display, and belongs to the fields of nanometer material preparation and surface modification. Background technique: [0002] In recent years, electronic ink display, as a new type of display technology, has received extensive attention. Electronic ink display is realized by the movement of electrophoretic particles dispersed in the medium in the electric field, which requires the particles to have good dispersion stability and chargeability in the dispersion medium. [0003] At present, there are mainly two methods for realizing electronic ink display, one is to wrap the electrophoretic display liquid in microcapsules, and the other is to directly use modified electrophoretic particles to prepare electrophoretic display liquid for electrophoretic display. This patent is aimed at the latter, inventing a method for preparing color electropho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/46G02F1/167
Inventor 乐园安午伟许恒哲陈建峰
Owner BEIJING UNIV OF CHEM TECH
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