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Method for preparing electronic ink microcapsule containing organic silicon

A technology of electronic ink and microcapsules, which is applied in the field of preparation of electronic ink microcapsules containing organic silicon, can solve the problems that the barrier performance of electrophoretic media needs to be further improved, and achieve improved storage and working stability, low surface energy, and easy industrial production Effect

Inactive Publication Date: 2011-06-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent 200310108941.9 uses complex coacervation of styrene-maleic anhydride copolymer and gelatin to prepare stable and sealed circular microcapsules, but the barrier performance of the microcapsules to the electrophoretic medium needs to be further improved

Method used

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  • Method for preparing electronic ink microcapsule containing organic silicon
  • Method for preparing electronic ink microcapsule containing organic silicon
  • Method for preparing electronic ink microcapsule containing organic silicon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Sodium carboxymethyl cellulose is made into 100 grams of the aqueous solution that the mass ratio concentration is 0.5%, and the terpolymer that the number average molecular weight is 100,000 styrene-maleic anhydride-vinyl silicone oil is made into 6.4 grams that the mass ratio concentration is 5% % of the aqueous solution is kept at 80°C for subsequent use; the gelatin is made into 40 grams of an aqueous solution with a mass ratio concentration of 10%, and is kept at 60°C for subsequent use.

[0023] Add electrophoretic particles, dyes, and additives to tetrachlorethylene, ultrasonically vibrate at 45°C to make 93.2 grams of a uniformly dispersed electrophoretic suspension, add to the above-mentioned gelatin / sodium carboxymethylcellulose / styrene-malay In the aqueous solution of anhydride-vinyl silicone oil terpolymer, disperse at a stirring rate of 500rpm for 50 minutes to obtain an O / W emulsion, and lower the pH value of the system to 4.5 with 20% acetic acid solution ...

Embodiment 2

[0025] Sodium carboxymethyl cellulose is made into 640 grams of an aqueous solution with a mass ratio concentration of 1%, and a terpolymer of styrene-maleic anhydride-vinyl silicone oil with a number average molecular weight of 4,620 is made into 64 grams of a mass ratio concentration of 0.1 % of the aqueous solution is kept at 70°C for subsequent use; the gelatin is made into 32 grams of an aqueous solution with a concentration of 10% by mass, and is kept at 60°C for subsequent use.

[0026] Add electrophoretic particles, dyes, and additives to tetrachlorethylene, ultrasonically vibrate at 45°C to make 30 grams of a uniformly dispersed electrophoretic suspension, add to the above gelatin / sodium carboxymethylcellulose / styrene-malay Anhydride-vinyl silicone oil terpolymer aqueous solution, dispersed at a stirring rate of 350rpm for 30 minutes to obtain an O / W emulsion, and lowered the pH value of the system to 4.5 with 10% citric acid solution at 45°C, and stirred Slowly lower...

Embodiment 3

[0028] Sodium carboxymethyl cellulose is made into 100 grams of the aqueous solution that the mass ratio concentration is 10%, and the terpolymer that the number average molecular weight is 50,000 styrene-maleic anhydride-vinyl silicone oil is made into 100 grams of the mass ratio concentration that is 10% % of the aqueous solution is kept at 90°C for subsequent use; the gelatin is made into 100 grams of an aqueous solution with a concentration of 5% by mass, and is kept at 45°C for subsequent use.

[0029] Add electrophoretic particles, dyes, and additives to tetrachlorethylene, ultrasonically vibrate at 45°C to make 25 grams of a uniformly dispersed electrophoretic suspension, add to the above-mentioned gelatin / sodium carboxymethyl cellulose / styrene-malay Anhydride-vinyl silicone oil terpolymer aqueous solution, dispersed at a stirring rate of 500rpm for 100 minutes to obtain an O / W emulsion, at 45°C, use 0.05% sulfuric acid solution to reduce the pH value of the system to 4....

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Abstract

The invention discloses a method for preparing electronic ink microcapsule containing organic silicon. The method comprises the following steps: 1) dissolving hydrolysate of terpolymer of sodium carboxymethylcellulose and styrol-maleic anhydride-vinyl silicone oil into water according to a mass ratio of 1-100:1; 2) dissolving gelatin in the water, and adding the mixture into the solution of the step 1) according to a ratio that the gelatin to the sodium carboxymethylcellulose is 0.5-20:1 by mass; 3) adding electrophoretic suspension, the hydrolysate of the terpolymer of the sodium carboxymethylcellulose and the styrol-maleic anhydride-vinyl silicone oil according to a mass ratio of 0.5-100:1 into the solution of the step 2), stirring and dispersing the solution to obtain O / W type emulsion; 4) adding acid or acid and water into the emulsion to perform a complex coacervation reaction; cooling the mixture, adding a crosslinking agent into the mixture to lead the mixture to be solidified and cross linked, and keeping on reaction; and 5) adding alkaline solution to adjust pH value of the solution, and heating the solution to react and obtaining the product. The method exerts the characteristics of high chemical stability and low surface energy of the organic silicon oil, has simple operation, low cost and easy industrial production.

Description

technical field [0001] The invention relates to the field of electrophoretic display, in particular to a method for preparing electronic ink microcapsules containing organic silicon. Background technique [0002] The rapid development of information science and technology calls for the emergence of ultra-light, ultra-thin, and low-energy flat-panel electronic display technology. Electrophoretic display technology is a kind of electronic display technology. Microcapsule electrophoretic display is a new type of electrophoretic display technology developed by E-ink company in the United States (US 5961804, 1999.10.5). Its biggest advantage is that electrophoretic particles and insulating suspension are encapsulated in microcapsules, thereby inhibiting the The agglomeration and deposition of electrophoretic particles improves the stability and service life of the electrophoretic display. The working principle of microcapsule electrophoresis display is a reflective display techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/167B01J13/02
Inventor 陈红征戴润英吴刚汪茫
Owner ZHEJIANG UNIV
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