Preparation method of density-controllable colorful electrophoresis particle for electronic paper

A technology for color electrophoresis and electronic paper, applied in instruments, optics, nonlinear optics, etc., can solve the problems that electrophoretic particles cannot be closely arranged, affect the service life of electrophoretic particles, and reduce the display quality of electronic paper, and achieve rich surface charge, color and luster. Vivid, mass-produced effects

Active Publication Date: 2013-10-30
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

The colored electrophoretic particles prepared by this method can greatly improve the weather resistance of the electrophoretic particles because the relatively stable phthalocyanine nano-pigment is used as a colorant. However, due to the limitation of the adopted process, the particle size of the prepared electrophoretic particles is too large , the particle size distribution of electrophoretic particles is between 4 and 9 μm
If the particle size of the electrophoretic particles is too large, the electrophoretic particles cannot be closely arranged on the display surface of the electronic paper, which affects the display brightness of the electronic paper and reduces the display quality of the electronic paper.
At the same time, the particle polymer prepared by this method is directly exposed to the organic electrophoretic medium, and the organic solvent is easy to swell the polymer, which affects the service life of the electrophoretic particles

Method used

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  • Preparation method of density-controllable colorful electrophoresis particle for electronic paper

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) In the reactor, sodium dodecylbenzenesulfonate is dissolved and dispersed in water to obtain sodium dodecylbenzenesulfonate solution, wherein the initial concentration of sodium dodecylbenzenesulfonate in water is 6g / L;

[0036] (2) Add nano-pigment blue 15 particles into the styrene monomer, and then perform ultrasonication in an ultrasonic device for 10 minutes, so that the nano-pigment blue 15 particles are uniformly dispersed in the styrene monomer to obtain a dispersion liquid, wherein the nano-pigment blue 15 The concentration in styrene monomer is 50g / L;

[0037] (3) the dispersion liquid that step (2) obtains is joined in the sodium dodecylbenzenesulfonate solution that step (1) obtains, and the dispersion liquid that step (2) obtains and the dodecylbenzene that step (1) obtains The volume ratio of sodium benzenesulfonate solution is 1: 25, carries out supersonic emulsification in sonicator, forms the styrene miniemulsion that comprises nano pigment blue 1...

Embodiment 2

[0043] (1) In the reactor, sodium dodecylbenzenesulfonate is dissolved and dispersed in water to obtain sodium dodecylbenzenesulfonate solution, wherein the initial concentration of sodium dodecylbenzenesulfonate in water is 20g / L;

[0044] (2) Add the nano-pigment green 7 particles into the styrene monomer, and then perform ultrasonication in an ultrasonic device for 10 minutes, so that the nano-pigment green 7 particles are uniformly dispersed in the styrene monomer to obtain a dispersion liquid, wherein the nano-pigment green 7 The concentration in styrene monomer is 1g / L;

[0045] (3) the dispersion liquid that step (2) obtains is joined in the sodium dodecylbenzenesulfonate solution that step (1) obtains, and the dispersion liquid that step (2) obtains and the dodecylbenzene that step (1) obtains The volume ratio of sodium benzenesulfonate solution is 1: 6, carries out supersonic emulsification in sonicator, forms the styrene miniemulsion that comprises nano-pigment gre...

Embodiment 3

[0052] (1) In the reactor, sodium dodecylbenzenesulfonate is dissolved and dispersed in water to obtain sodium dodecylbenzenesulfonate solution, wherein the initial concentration of sodium dodecylbenzenesulfonate in water is 1g / L;

[0053] (2) Add the nano-pigment white 6 particles to the styrene monomer, and then perform ultrasonication in an ultrasonic device for 10 minutes, so that the nano-pigment white 6 particles are uniformly dispersed in the styrene monomer to obtain a dispersion liquid, wherein the nano-pigment white 6 The concentration of particles in styrene monomer is 200g / L;

[0054] (3) the dispersion liquid that step (2) obtains is joined in the sodium dodecylbenzenesulfonate solution that step (1) obtains, and the dispersion liquid that step (2) obtains and the dodecylbenzene that step (1) obtains The volume ratio of sodium benzenesulfonate solution is 1: 400, carries out supersonic emulsification in ultrasonic machine, forms the styrene miniemulsion that com...

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Abstract

The invention belongs to the preparation field of a colorful electrophoresis particle for electronic paper and in particular relates to a preparation method of a density-adjustable colorful electrophoresis particle of a composite structure for electronic paper based on nano pigment as a core, a polymer as an intermediate layer and silicon dioxide as a shell layer. The preparation method comprises the following steps: coating the polymer on the surfaces of various colorful nano pigment particles by using a miniemulsion polymerization method so as to form a colorful polymer nano ball the surface of which is charged; and then coating a silicon dioxide layer transparent to a visible light on the surface of the colorful polymer nano ball so as to obtain the electrophoresis particle with the composite structure in which the nano pigment is used as the core, the polymer is used as the intermediate layer and silicon dioxide is used as the shell layer. The density of the colorful electrophoresis particle can be regulated and controlled between 1.1 g / cm<3> and 2 g / cm<3>; and the size of the particle is 150-400nm, the zeta potential of the surface of the colorful electrophoresis particle is minus 40-minus 50mV. The preparation method is simple and is easy to realization industrial production on large scale.

Description

technical field [0001] The invention belongs to the field of preparation of colored electrophoretic particles for electronic paper, in particular to a method for preparing electrophoretic particles with a composite structure whose density is adjustable, with nano pigments as cores, polymers as intermediate layers, and silicon dioxide as shell layers. Background technique [0002] As an emerging display, electronic paper has the advantages of low energy consumption, good daylight readability, low production cost, and easy fabrication of flexible displays. It is a flexible electronic display with great development potential. [0003] The display principle of electronic paper is: in the electronic paper device, the electrophoretic particles with charges on the surface immersed in the electrophoretic medium move to the opposite electric electrode under the action of the electric field to brighten or darken the pixels, thereby realizing the display. [0004] Realizing the color d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B69/10C08F112/08C08F2/44C08F2/24C08F120/14C08F120/18G02F1/167
Inventor 唐芳琼温婷孟宪伟
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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