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Method for preparing quasi-uniform electronic ink micro capsule

An electronic ink and microcapsule technology is applied in the field of preparation of quasi-uniform electronic ink microcapsules, and can solve the problems of difficult control of conditions and the like

Inactive Publication Date: 2008-07-23
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the particle size distribution of urea-formaldehyde resin-based electronic ink microcapsules prepared by the in-situ polymerization method is generally in the range of 30-300 μm; The range is also

Method used

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  • Method for preparing quasi-uniform electronic ink micro capsule
  • Method for preparing quasi-uniform electronic ink micro capsule
  • Method for preparing quasi-uniform electronic ink micro capsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Dissolve the oil-soluble black in tetrachloroethylene, and remove the residue by filtration; weigh 30 mg of surface-modified red powder, use 45 mg of Span80 as a dispersant, and ultrasonically disperse it in 6 mL of tetrachloroethylene containing oil-soluble black.

[0015] Dissolve 0.75g of gelatin and 0.75g of gum arabic in 100mL of distilled water respectively, keep at 40-45°C, and mix the two solutions under stirring; at the same time, accurately weigh a certain amount of SDS so that the SDS concentration in the solution is 0.01wt%; add 2mL capsule core, start stirring slowly, control the adjustment time over 15s, make the stirring speed gradually reach 800rpm, keep stirring at 40-45°C for 30min, and obtain quasi-uniformly dispersed electrophoretic base liquid droplets; use 5wt% acetic acid solution, Use more than 5 minutes to slowly adjust the pH of the solution to 3.7, so that the gelatin and gum arabic will re-coagulate. After the coagulated phase is formed, let t...

Embodiment 2

[0017] Dissolve the oil-soluble black in tetrachloroethylene, and remove the residue by filtration; weigh 30 mg of surface-modified red powder, use 45 mg of Span80 as a dispersant, and ultrasonically disperse it in 6 mL of tetrachloroethylene containing oil-soluble black.

[0018] Dissolve 0.75g of gelatin and 0.75g of gum arabic in 100mL of distilled water respectively, keep at 40-45°C, and mix the two solutions under stirring; at the same time, accurately weigh a certain amount of SDS so that the SDS concentration in the solution is 0.005wt%; add 2mL capsule core, start stirring slowly, control the adjustment time over 15s, make the stirring speed gradually reach 800rpm, keep stirring at 40-45°C for 30min, and obtain quasi-uniformly dispersed electrophoretic base liquid droplets; use 5wt% acetic acid solution, Use more than 5 minutes to slowly adjust the pH of the solution to 3.7, so that the gelatin and gum arabic will re-coagulate. After the coagulated phase is formed, let ...

Embodiment 3

[0020] Dissolve the oil-soluble black in tetrachloroethylene, and remove the residue by filtration; weigh 30 mg of surface-modified red powder, use 45 mg of Span80 as a dispersant, and ultrasonically disperse it in 6 mL of tetrachloroethylene containing oil-soluble black.

[0021] Dissolve 0.75g gelatin and 0.75g gum arabic in 100mL distilled water respectively, keep at 40-45°C, and mix the two solutions under stirring; at the same time, accurately weigh a certain amount of SDS so that the SDS concentration in the solution is 0.015wt%; add 2mL capsule core, start stirring slowly, control the adjustment time over 15s, make the stirring speed gradually reach 900rpm, keep stirring at 40-45°C for 30min, and obtain quasi-uniformly dispersed electrophoretic base liquid droplets; use 5wt% acetic acid solution, Use more than 5 minutes to slowly adjust the pH of the solution to 3.7, so that the gelatin and gum arabic will re-coagulate. After the coagulated phase is formed, let the mixtu...

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Abstract

The invention relates to a method for preparing quasi-uniform electronic ink micro-capsule. Wherein, the electronic ink is the electrophoretic display material of micro-capsule, which contains the paint particles and dyestuff solution into micro-capsule to use the electrophoretic display theory to realize the electrophoretic display in the micro-capsule, and it can be used in flat or flexible display. The invention uses dodecyl sodium sulfate (SDS) of negative ion surface activator as diffusion agent, the scarlet powder as paint particles, the ankilostin as organic solvent, and the solvent black as solvent dyestuff. First preparing quasi-uniform diffused electrophoretic base drop; then by adjusting the pH value, processing the composite aggregation reaction between gelatine and acacia gum to attain the quasi-uniform electronic ink micro-capsule. And via changing the concentration of SDS and the mixing speed, the quasi-uniform electronic ink micro-capsule whose diameter is controlled in 30-90mu m can be attained. The invention has simple method, and controllable reaction without special demand for devices.

Description

technical field [0001] The invention relates to a preparation method of a quasi-uniform electronic ink microcapsule, in particular to a preparation method of a quasi-uniform electronic ink microcapsule for flexible or flat panel display. Background technique [0002] Electronic ink display is microencapsulated electrophoretic display technology, which refers to encapsulating pigment particles and dye solutions in microcapsules, and using the principle of electrophoretic display to realize electrophoretic display in microcapsules, thereby inhibiting the electrophoretic particles from being larger than the capsule. The disadvantages such as agglomeration and deposition in the interior, improve its stability and prolong its service life. Electronic ink is a kind of ink-like suspended matter, which can realize reversible, bistable, and flexible display under the action of an external electric field. It is a flexible display material and technology with good visibility, low power...

Claims

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Application Information

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IPC IPC(8): B01J13/10G02F1/167
Inventor 赵晓鹏郭慧林王建平
Owner NORTHWESTERN POLYTECHNICAL UNIV
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