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Electrophoretic particle and preparation method thereof, microcapsule and electronic ink screen

A technology of electrophoretic particles and microcapsules, applied in instruments, optics, nonlinear optics, etc., can solve the problems of poor dispersion of electrophoretic particles, poor loading capacity, insensitivity to motion, etc. Effect

Active Publication Date: 2017-01-04
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an electrophoretic particle and its preparation method, a microcapsule and an electronic ink screen, which solves the problems of poor dispersion, easy agglomeration, insensitive movement and poor load capacity of the electrophoretic particle in the prior art

Method used

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  • Electrophoretic particle and preparation method thereof, microcapsule and electronic ink screen
  • Electrophoretic particle and preparation method thereof, microcapsule and electronic ink screen

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Embodiment approach

[0047] According to one embodiment of the electrophoretic particle of the present invention, the hydrophilic segment is composed of polyethylene glycol methyl ether methacrylate and polyelectrolyte.

[0048] According to the electrophoretic particle of the present invention, polyoligoethylene glycol methyl ether methacrylate contains the structure of ethylene glycol, so it has the performance of a lubricant, can reduce the surface energy of the electrophoretic particle, and solve the problem that the electrophoretic particle is easy to agglomerate; On the one hand, polyoligoethylene glycol methyl ether methacrylate can stabilize the dispersion of electrophoretic particles through the steric hindrance effect.

[0049] According to the electrophoretic particle of the present invention, the polyelectrolyte is polydiisopropylaminoethyl methacrylate or polyacrylic acid.

[0050] According to the electrophoretic particle of the present invention, the amine group of polydiisopropylam...

Embodiment 1

[0088] The preparation method of electrophoretic particles according to the present invention comprises the steps of: modifying the chain transfer agent: the chain transfer agent is trithiocarbonate; TiO 2 The surface of the microspheres contains hydroxyl groups, and 1 equivalent of TiO 2 Microspheres undergo esterification reaction with 5 equivalents of chain transfer agent to modify chain transfer agent; modified polystyrene: 1 equivalent of TiO modified with chain transfer agent 2 Microspheres, living radical polymerization with 40 equivalents of styrene, on TiO modified with a chain transfer agent 2 Polystyrene modified on microspheres; modified oligoethylene glycol methyl ether methacrylate: 1 equivalent of TiO modified with polystyrene 2 Or ZnO microspheres, and 15 equivalents of oligoethylene glycol methyl ether methacrylate for living free radical polymerization, in the modified polystyrene TiO 2 or ZnO microspheres modified with polyethylene glycol methyl ether meth...

Embodiment 2

[0090] The preparation method of electrophoretic particles according to the present invention comprises the steps of: modifying the chain transfer agent: the chain transfer agent is dithiocarbonate; TiO 2 The surface of the microspheres contains hydroxyl groups, and 1 equivalent of TiO 2 Microspheres undergo esterification reaction with 10 equivalents of chain transfer agent to modify chain transfer agent; modified polystyrene: 1 equivalent of TiO modified with chain transfer agent 2 Microspheres, living radical polymerization with 60 equivalents of styrene, on TiO modified with a chain transfer agent 2 The microspheres are modified with polystyrene; modified oligoethylene glycol methyl ether methacrylate: 1 equivalent of TiO modified with polystyrene 2 Microspheres, living radical polymerization with 125 equivalents of oligoethylene glycol methyl ether methacrylate, on polystyrene-modified TiO 2 The microspheres are modified with polyoligoethylene glycol methyl ether methac...

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PUM

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Abstract

The invention discloses an electrophoretic particle and a preparation method thereof, a microcapsule and an electronic ink screen. According to the invention, the electrophoretic particle is a nanoparticle with a core-shell structure, wherein the core is TiO2 or ZnO; the shell is a macromolecular polymer modified on the core; and the macromolecular polymer comprises a hydrophobic segment and a hydrophilic segment. According to the invention, the preparation method of the electrophoretic particle comprises the steps: modifying a chain transfer agent; modifying polystyrene; modifying poly-oligo polyethylene glycol methyl ether methyl acrylate; and modifying polyelectrolyte. According to the invention, the microcapsule comprises the electrophoretic particle provided by the invention. According to the invention, the electronic ink screen comprises the microcapsule provided by the invention.

Description

technical field [0001] The invention relates to the field of electronic ink, in particular to an electrophoretic particle, a preparation method thereof, a microcapsule and an electronic ink screen. Background technique [0002] The traditional preparation method of electrophoretic particles is to add a coupling agent to the alcohol water to pre-modify the surface of the pigment molecules, grind them after centrifugal drying, and then add polymer materials to wrap the pigment molecules, that is, to carry out physical blending. preparation. [0003] The traditional preparation method has the following disadvantages: (1) Agglomeration is easy to occur during the drying process; (2) Dust will be generated during the grinding process; (3) The pigment molecules need to be surface modified, dried and ground in sequence, and the process is cumbersome; (4) Due to the limitation of performance efficiency, the amount of polymer coating generally does not exceed 8%. Therefore, the disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/167C08F292/00C08F212/08C08F285/00C08F220/28
CPCC08F285/00C08F292/00G02F1/167G02F2001/1678C08F212/08C08F220/286
Inventor 殷刘岳谢涛峰李可丰曾亭胡海峰周栋
Owner BOE TECH GRP CO LTD
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