Preparation method of inorganic-organic composite electronic iron microcapsules

A technology of electronic ink and microcapsules, which is applied in the field of preparation of inorganic-organic composite electronic ink microcapsules, can solve the problems of high cost, poor pressure resistance, and poor flexibility, and achieve low cost, improved heat resistance, and excellent durability. Chemical and barrier effects

Active Publication Date: 2012-08-29
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Urea-formaldehyde resin microcapsule wall material has high mechanical strength, but poor flexibility, so the flexible electrophoresis made of this material shows poor scratch resistance and pressure resistance.
The production efficiency of gelatin-gum arabic complex coacervation is high, but because gum arabic is an imported product for China, large-scale commercial application will lead to high cost; in addition, gum arabic is easy to degrade, and long-term use will reduce the barrier property of capsules

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Add 40 g of deionized water to dilute 50 g of acidic nano-silica sol (with a particle size of 20 nm to 30 nm) with a solid content of 30%, and stir to make the acidic nano-silica sol particles uniformly dispersed.

[0043] 2. Add the electrophoretic suspension (titanium dioxide 20%, black dyestuff 20%, tetrachloroethylene 58%, polyisosuccinic anhydride 2% to the electrophoretic suspension containing 25g tetrachlorethylene in the above-mentioned diluted acidic nano-silica sol) ), through ultrasonic homogenization to form a solid stable emulsion.

[0044] 3. Heat the above solid stable emulsion to 60°C, add 0.5g of ammonium persulfate, and slowly add the mixed monomer 1 and the mixed monomer 2 dropwise in sequence;

[0045] The composition of mixed monomer 1 is: 5g methyl methacrylate, 4g butyl methacrylate, 5g dipentaerythritol pentaacrylate, mixed evenly;

[0046] The composition of mixed monomer 2 is: 7g of methyl methacrylate, 5g of styrene, 5g of butyl methacryla...

Embodiment 2

[0055] 1. Add 34 g of deionized water to dilute 50 g of acidic nano-silica sol (particle size: 20 nm to 30 nm) with a solid content of 25%, and stir to make the acidic nano-silica sol particles uniformly dispersed.

[0056] 2. Adding the electrophoretic suspension (20% of titanium dioxide, 20% of black dye, 58% of tetrachlorethylene, and 2% polyisosuccinic anhydride) containing 21g tetrachlorethylene as solvent in the above-mentioned diluted acidic nano-silica sol ), after vigorous stirring to form a solid stable emulsion.

[0057] 3. Raise the temperature of the above solid stable emulsion to 78°C, add 0.5g of potassium persulfate, and slowly add the mixed monomer 1 and the mixed monomer 2 in sequence;

[0058] The composition of mixed monomer 1 is: 2g methyl methacrylate, 3g butyl methacrylate, 4g dipentaerythritol pentaacrylate, mixed evenly;

[0059] The composition of the mixed monomer 2 is: 5g methyl methacrylate, 4g styrene, 4g butyl methacrylate, 3g trimethylolpropane...

Embodiment 3

[0068] 1. Add 40 g of deionized water to dilute 2 g of acidic nano-silica sol (with a particle size of 5 nm to 10 nm) with a solid content of 30%, and stir to make the acidic nano-silica sol particles uniformly dispersed.

[0069] 2. Add the electrophoretic suspension (titanium dioxide 20%, black dyestuff 20%, tetrachloroethylene 58%, polyisosuccinic anhydride 2% to the electrophoretic suspension containing 30g tetrachlorethylene in the above-mentioned diluted acidic nano-silica sol) ), through ultrasonic homogenization to form a solid stable emulsion.

[0070] 3. Heat the above solid stable emulsion to 60°C, add 0.5g of ammonium persulfate, and slowly add the mixed monomer 1 and the mixed monomer 2 dropwise in sequence;

[0071] The composition of the mixed monomer 1 is: 5g ethylene glycol diacrylate, 4g ethyl methacrylate, 5g dipentaerythritol hexaacrylate, mixed evenly;

[0072] The composition of the mixed monomer 2 is: 7g of methyl methacrylate, 5g of styrene, 5g of buty...

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Abstract

The invention discloses a method for preparing inorganic-organic composite electronic iron microcapsules. The method adopts acid nanometer silica sol as solid stabilizers, electrophoresis suspending liquid is stabilized, water-soluble anion initiating agents are added, the temperature is raised to the decomposition temperature, mixed monomers are dripped for conducting heterogeneous polymerization, generated polymers are covered on the liquid drip surface of the electrophoresis suspending liquid, and the inorganic-organic composite electronic iron microcapsules are formed. The method has the advantages that silica sol with low cost and wide sources is adopted as one of capsule wall materials, the electronic iron cost is reduced, and in addition, the heat resistance, the chemical resistance and the barrier performance of the capsule wall are improved. Through regulating the mixing proportion and the kinds of monomers, the use requirements of flexible display electronic paper can be met.

Description

technical field [0001] The invention relates to the field of electronic display, in particular to a method for preparing an inorganic-organic composite electronic ink microcapsule. Background technique [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 to adapt to it. Electrophoretic display technology is a kind of electronic display technology. The biggest advantage of the microcapsule electrophoretic display is that the electrophoretic particles and insulating suspension are encapsulated in the microcapsules, thereby inhibiting the agglomeration and deposition of the electrophoretic particles, and improving the stability and service life of the electrophoretic display. [0003] The working principle of microcapsule electrophoresis display is a reflective display technology based on the electrophoretic phenomenon of charged particles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14C09D11/00G02F1/167
Inventor 舒适赵吉生李琳
Owner BOE TECH GRP CO LTD
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