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Preparation method of electrophoretic display microcapsule containing organic silicon

An electrophoretic display and microcapsule technology, which is applied in the fields of microcapsule preparation, microsphere preparation, optics, etc., can solve the problems that cannot be reused, cannot change images in real time, and the barrier performance of electrophoretic medium needs to be further improved.

Active Publication Date: 2010-02-10
CHANGSHU CHANGJI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it also has disadvantages: it cannot change images instantly like an electronic display, so it cannot be reused
Chinese patent 200310108941.9 uses complex coacervation of styrene maleic anhydride copolymer and gelatin to prepare stable and sealed round microcapsules, but the barrier performance of the microcapsules to the electrophoretic medium needs to be further improved

Method used

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  • Preparation method of electrophoretic display microcapsule containing organic silicon
  • Preparation method of electrophoretic display microcapsule containing organic silicon
  • Preparation method of electrophoretic display microcapsule containing organic silicon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The hydrolyzate and gelatin of the vinyl silicone oil-styrene-maleic anhydride terpolymer with a number average molecular weight of 4620 are formulated into 100 grams of 0.1% aqueous solution respectively, their pH value is adjusted to 7, and kept at 40°C spare.

[0024] Add electrophoretic particles, dyes, and additives to tetrachloroethylene, ultrasonically vibrate at 40°C to make a uniform dispersion of 20 grams, add it to the above-mentioned silicon-containing aqueous solution, and stir for 100 minutes to obtain an O / W emulsion. Add the prepared gelatin solution into the emulsion, lower the pH value of the system to 4.5 with 0.05% acetic acid solution at 40°C, then add hot water 5 times that of the gelatin aqueous solution into the emulsion, and slowly lower the temperature to At 10°C, add 2.5 ml of 40% formaldehyde solution dropwise to the above system to cross-link the walls of the microcapsules, continue the reaction for 1 hour, add 3% sodium hydroxide solution t...

Embodiment 2

[0026] The vinyl silicone oil-styrene-maleic anhydride terpolymer hydrolyzate that number average molecular weight is 15000 is made into 100 grams of 20% aqueous solution, gelatin is made into 10 grams of 30% aqueous solution, their pH value is adjusted to 7.0, and kept at 65°C for later use.

[0027] Electrophoretic particles, dyes, and additives were added to tetrachlorethylene, and ultrasonically oscillated at 65° C. to form 23 grams of a uniform dispersion. Add it into the above-mentioned vinyl silicone oil-styrene-maleic anhydride terpolymer hydrolyzate solution, stir for 1 minute to obtain an O / W emulsion, add the prepared gelatin solution into the emulsion, and use 3 % citric acid solution to reduce the pH value of the system to 4.5, slowly lower the temperature to 0°C while stirring, add 4 ml of 40% glutaraldehyde aqueous solution to the above system dropwise to cross-link the microcapsule wall, and continue the reaction for 1 hour , adding 3% sodium hydroxide solutio...

Embodiment 3

[0029] The hydrolyzate and gelatin of the vinyl silicone oil-styrene-maleic anhydride terpolymer that the number average molecular weight is 90000 are made into 100 grams of 4% aqueous solution respectively, their pH value is adjusted to 6.5, and in 50 ℃ insulation spare.

[0030] Add electrophoretic particles, dyes, and additives to tetrachlorethylene, ultrasonically vibrate at 50°C to make 80 grams of a uniform dispersion, and add to the hydrolyzate of the above-mentioned vinyl silicone oil-styrene-maleic anhydride terpolymer solution, stirred for 20 minutes to obtain an O / W emulsion, the prepared gelatin solution was added to the emulsion, and the pH value of the system was reduced to 4.5 with 10% acetic acid solution at 50 ° C, and then 5 times the gelatin aqueous solution Add hot water into the emulsion, slowly lower the temperature to 5°C while stirring, add 100 ml of 0.02% acetaldehyde aqueous solution dropwise to the above system to cross-link the microcapsule wall, co...

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Abstract

The invention discloses a preparation method of electrophoretic display microcapsule containing organic silicon. The microcapsule is prepared by complex coacervation of gelatin and hydrolysate of vinyl-silicone oil-styrene-maleic anhydride terpolymer. Through appropriate technology, encysted object is firstly emulsified in aqueous solution of vinyl-silicone oil-styrene-maleic anhydride terpolymer,gelatin is added, and complex coacervation is carried out by adding acid and / or water. The invention induces organic silicon component into microcapsule wall by providing synthetic macromolecule vinyl-silicone oil-styrene-maleic anhydride terpolymer and utilizes the characteristics of stability and low surface energy of organosilicon chemistry to improve separating capability of the microcapsuleto electrophoretic medium, thus improving storing and working stability of the electrophoretic microcapsule. And stable and sealed spherical microcapsule is prepared by appropriate raw material formula and technology.

Description

technical field [0001] The invention relates to a method for preparing electrophoretic display microcapsules containing organic silicon. technical background [0002] The rapid development of information science and technology calls for a new flat-panel electronic display technology that is thin, light, low driving voltage, and low power consumption. Compared with electronic display technology, traditional ordinary paper has superior performance: reflect 80% of the irradiated light; provide satisfactory contrast ratio (about 20:1); disperse reflected light in any direction; cheap, light weight, thin, convenient It is portable, flexible and foldable, and can provide color images; it can save images for a long time without consuming energy, and has long-lasting memory. But it also has disadvantages: it cannot change images instantly like an electronic display, so it cannot be used repeatedly. Therefore, combining the advantages of ordinary paper and electronic displays to re...

Claims

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Application Information

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IPC IPC(8): B01J13/14G02F1/167
Inventor 吴刚戴润英陈红征汪茫
Owner CHANGSHU CHANGJI CHEM
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