Preparation method of fluorescent and colored electrophoretic particles for electrophoretic display device (EPD) visible at night

A technology of visible electrophoresis and color electrophoresis, applied in the direction of organic dyes, can solve the problems of weak fluorescence intensity, etc., and achieve the effect of regular shape, high arrangement density and good light fastness

Active Publication Date: 2014-03-12
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this particle has fluorescent properties, the fluorescence intensity is weak, so it is not suitable for use in electrophoretic displays that can be actively displayed.

Method used

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  • Preparation method of fluorescent and colored electrophoretic particles for electrophoretic display device (EPD) visible at night

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) In the reactor, dissolve sodium dodecylbenzenesulfonate in water to obtain sodium dodecylbenzenesulfonate solution, wherein the initial concentration of sodium dodecylbenzenesulfonate in water is 6g / L ;

[0033] (2) Add nano-scale pigment yellow 138 particles into styrene monomer, and then ultrasonically disperse them in an ultrasonic machine for 10 minutes, so that nano-scale pigment yellow 138 particles can be uniformly dispersed in styrene monomer to obtain a dispersion liquid, in which nano-scale The concentration of Pigment Yellow 138 in styrene monomer is 50g / L;

[0034] (3) Add the dispersion obtained in step (2) to the sodium dodecylbenzenesulfonate solution obtained in step (1), the dispersion obtained in step (2) and the dodecylbenzene obtained in step (1) The volume ratio of sodium benzenesulfonate solution is 1:25, carries out supersonic emulsification 10 minutes in ultrasonicator, forms the styrene miniemulsion that comprises nanoscale pigment yellow 1...

Embodiment 2

[0040] (1) In the reactor, dissolve sodium dodecylbenzenesulfonate in water to obtain sodium dodecylbenzenesulfonate solution, wherein the initial concentration of sodium dodecylbenzenesulfonate in water is 20g / L;

[0041] (2) Add nano-scale Pigment Green 7 particles to styrene monomer, and then perform ultrasonication in an ultrasonic machine for 10 minutes, so that nano-scale Pigment Green 7 particles can be uniformly dispersed in styrene monomer to obtain a dispersion liquid, in which nano-scale The concentration of Pigment Green 7 in styrene monomer is 1g / L;

[0042] (3) Add the dispersion obtained in step (2) to the sodium dodecylsulfonate solution obtained in step (1), the dispersion obtained in step (2) and the dodecylsulfonate obtained in step (1) The volume ratio of sodium bicarbonate solution is 1:4, carries out ultrasonic emulsification in sonicator 30 minutes, forms the styrene miniemulsion that comprises nanoscale pigment green 7 particles;

[0043] (4) Dissolvin...

Embodiment 3

[0048] (1) In the reactor, dissolve sodium dodecylbenzenesulfonate in water to obtain sodium dodecylbenzenesulfonate solution, wherein the initial concentration of sodium dodecylbenzenesulfonate in water is 1g / L ;

[0049] (2) Add nano-scale Pigment White 6 particles to styrene monomer, and then perform ultrasonication in an ultrasonic machine for 10 minutes, so that nano-scale Pigment White 6 particles can be uniformly dispersed in styrene monomer to obtain a dispersion liquid, in which nano-scale The concentration of Pigment White 6 particles in styrene monomer is 200g / L;

[0050] (3) Add the dispersion obtained in step (2) to the sodium dodecylbenzenesulfonate solution obtained in step (1), the dispersion obtained in step (2) and the dodecylbenzene obtained in step (1) The volume ratio of sodium benzenesulfonate solution is 1:10, carries out supersonic emulsification 5 minutes in ultrasonic machine, forms the styrene miniemulsion that comprises nanoscale pigment white 6 pa...

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Abstract

The invention belongs to the preparation field of fluorescent and colored electrophoretic particles for an electrophoretic display device, and particularly relates to a preparation method of the fluorescent and colored electrophoretic particles of an electrophoretic display device visible at night. In the invention, surfaces of nanoscale paint particles in various colors are wrapped with polymers through a miniemulsion polymerization method; during the polymerizing process, a fluorescent precursor is added to form keys and fluorescent layers on the surfaces of the polymers, and the fluorescent and colored electrophoretic particles, each of which is provided with a three-layer structure formed by a nanometer paint particle core, a polymer middle layer and a fluorescent material casing layer, and has the particle diameter of 100 to 250 nm, are obtained. The fluorescent and colored electrophoretic particles can be used in the electrophoretic display device visible at night. The colored electrophoretic particles are characterized in that images are shown through the reflecting action to light under the conditions of daytime or sufficient ray of light; and at night or in dark places, the fluorescent and colored electrophoretic particles send out fluorescence through the stimulation of backlighting component internally built in the electrophoretic display device in which the fluorescent and colored electrophoretic particles are loaded.

Description

technical field [0001] The invention belongs to the field of preparation of fluorescent color electrophoretic particles for electrophoretic displays, in particular to the preparation of fluorescent color electrophoretic particles for electrophoretic displays that are visible at night and are composed of nano-scale pigment particle cores, polymer intermediate layers, and fluorescent material shells. method. Background technique [0002] Electronic paper display has become a hot spot in recent years due to its advantages of lightness, thinness, flexibility and impact resistance. Among the electronic paper display technologies including Liquid Crystal Display, Organic Light-emitting Diode and Plasma Display Panel, electrophoretic display has the advantages of comfortable reading, low production cost, energy saving and environmental protection, etc. Become one of the technologies with great development potential. [0003] The display principle of the electrophoretic display is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B69/10
Inventor 唐芳琼温婷孟宪伟
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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