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Preparation device and preparation method for electronic ink microcapsule

A technology of electronic ink and preparation equipment, which is applied in the direction of microcapsule preparation, microsphere preparation, ink, etc., can solve the problems of uneven particle size of microcapsules, low manufacturing efficiency, and poor product repeatability, and achieve uniform particle size , low cost and high yield

Inactive Publication Date: 2012-07-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, process parameters and operating conditions have a great influence on the coating rate, surface morphology and particle size distribution of microcapsules in the existing methods, and the reproducibility of the product is not strong, especially the produced microcapsules. Even, it needs to be screened by classification, and the manufacturing efficiency is relatively low

Method used

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  • Preparation device and preparation method for electronic ink microcapsule
  • Preparation device and preparation method for electronic ink microcapsule
  • Preparation device and preparation method for electronic ink microcapsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Dissolve 3 g of toluidine red in 500 mL of concentrated sulfuric acid, and stir to obtain a toluidine red solution. Dissolve 100mL of alkyl hydroxamic acid in 10L of water, slowly add the toluidine red solution dropwise into the aqueous solution, react for 20 minutes, add carbon tetrachloride, react for 10 minutes under stirring at 20°C, then let stand to separate layers, and remove the lower layer, namely A red electrophoretic display solution was obtained. The capsule wall material is prepared from gelatin and carboxymethyl cellulose, respectively prepare gelatin aqueous solution and carboxymethyl cellulose aqueous solution with a concentration of 2.5%, take 5L of gelatin aqueous solution, stir at 600r / min at 40°C, and heat to the preset temperature Finally, add 1.3g / L SDS, stir for 30min, then add 1L1 concentration of 2.5% carboxymethylcellulose aqueous solution, stir for 30min, add appropriate amount of acetic acid, adjust the pH value to 3.5-3.8. The red electroph...

Embodiment 2

[0036] Dissolve 5g of toluidine red in 1L of tetrahydrofuran; measure 100mL of Span-80 and add it to 20L of deionized water. Under the condition of stirring at room temperature, add the toluidine red-tetrahydrofuran solution dropwise into the aqueous solution to react for 15 minutes, then add 800 mL of tetrachloroethylene and 250 mL of cyclohexane, continue stirring for 10 minutes, then let stand for 10 minutes, and remove the lower layer. Add 5g of dispersant UV681, and magnetically stir for 30min at room temperature to obtain a red electrophoretic display solution. The capsule wall material is water-based polyurethane JF4015, with a solid content of 33±1%. Add 0.5% curing agent JF9001 under stirring conditions, and stir for 10-15 minutes until the mixture is uniform. Pass the red electrophoretic display solution and the cyst wall solution into the inner and outer tubes respectively, control the flow rate of the red electrophoretic solution to 1L / hr, and the flow rate of the ...

Embodiment 3

[0038] Dissolve 4g of red powder in 1L of dimethyl sulfoxide; measure 100mL of alkylhydroxamic acid and add it to 200mL of ethanol. After it is completely dissolved, add it into 20L of deionized water. Under room temperature and stirring conditions, the red powder-dimethyl sulfoxide solution was added dropwise into water to react for 15 minutes, then 1L of tetrachlorethylene and 300mL of isopropanol were added, and after stirring, the layers were separated, the lower layer was removed, and 3.5g of CH- 6 Stir to obtain a red electrophoretic display solution. The capsule wall material is water-based transparent polyurethane JF4015, with a solid content of 33±1%. Add about 0.5% curing agent JF9001 under stirring conditions, and stir for 10-15 minutes until the mixture is uniform. The red electrophoretic display solution and the capsule wall solution are passed into the inner and outer tubes respectively, and the feed flow rate of the red electrophoretic display liquid is controll...

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Abstract

The invention discloses a preparation device and a preparation method for an electronic ink microcapsule and belongs to the technical field of ink. Capsule core particles and capsule wall solution are simultaneously sprayed from different passages of the device respectively, and a capsule wall collides with the capsule core particles and is absorbed on the surfaces of the capsule core particles to form a layer of uniform and compact coating, so that the microcapsule is obtained. The defects of complex process, long synthetic time, uneven capsule particle size distribution, uneasiness in control, and the like of the traditional preparation method are overcome by the preparation device and the preparation method provided by the invention. The preparation method is simple in technical step, low in pollution and high in yield; and required equipment is convenient to operate simply and low in cost. The particle size of the microcapsule prepared by the method is uniform and is 10 to 100 microns generally. High-quality products are provided for the mass application of a microcapsule display material.

Description

technical field [0001] The invention relates to a preparation device and a preparation method of electronic ink microcapsules, belonging to the technical field of electronic ink. Background technique [0002] In recent years, electronic ink display, as a new type of display technology, has received extensive attention. The electronic ink microcapsule is to wrap the electrophoretic display liquid containing electrophoretic particles and dispersion medium in the microcapsule, and under the action of an electric field, the pigment particles can realize electrophoretic display in the microcapsule. The microcapsules inhibit the agglomeration and deposition of the electrophoretic particles in a scale larger than the capsule, improve the stability of the electrophoretic display liquid, and prolong the service life. Compared with the current popular cathode ray tube (CRT), liquid crystal display (LCD) and other display technologies, electronic ink has high contrast, wide viewing an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/16C09D11/00G02F1/167
Inventor 陈建峰乐园岳培华侯欣妍
Owner BEIJING UNIV OF CHEM TECH
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