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Microsphere for electronic papers and uses thereof

A technology of electronic paper and microspheres, applied in instruments, optics, identification devices, etc., can solve problems such as adverse effects of electrophoresis speed, high toxicity, and environmental pollution

Inactive Publication Date: 2008-08-20
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pigment particles with irregular shapes will inevitably have a certain adverse effect on the electrophoresis speed
[0008] At present, the dispersion medium used in the electrophoretic suspension in electronic paper is mostly a highly toxic solvent, such as toluene, xylene, etc., which will cause certain pollution to the environment

Method used

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  • Microsphere for electronic papers and uses thereof
  • Microsphere for electronic papers and uses thereof
  • Microsphere for electronic papers and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Example 1: Using allyl methacrylate to synthesize a cross-linked core polymer with a lower limit of dosage. Its formula is listed in table 1:

[0074] Table 1

[0075]

[0076] In a 50ml beaker, dissolve the dye in the monomer mix. After fully stirring and dissolving, filter and set aside.

[0077] In a 250ml four-neck flask equipped with a stirring, condenser, air duct and thermometer, dissolve sodium dodecyl sulfate, potassium peroxodisulfate, and sodium bicarbonate in deionized water, and stir to dissolve. Introduce argon gas, keep the constant temperature at about 30°C, add the monomer mixture mixed with dye dropwise, and keep the stirring speed at 300rpm-400rpm. After the monomer is added dropwise, keep the dispersed state for 3hrs. Then heat up, keep warm at 70°C for 5hrs, keep warm at 80°C for 1hr, cool down, and the reaction ends.

Embodiment 2

[0078] Embodiment 2: Utilize allyl methacrylate to synthesize a cross-linked core polymer with an intermediate amount. Its formula is listed in table 2:

[0079] Table 2

[0080]

[0081] The synthesis process is similar to Example 1.

Embodiment 3

[0082] Example 3: Using allyl methacrylate to synthesize a cross-linked core polymer with an upper limit. Its formula is listed in table 3:

[0083] table 3

[0084]

[0085] The synthesis process is similar to Example 1.

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PUM

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Abstract

The invention relates to a microsphere used for synthesizing electronic paper by embedding dyes as well as the synthesis and application thereof. The invention is characterized in that the microsphere comprises an inner core and a shell; wherein, the inner core is polymer embedding dye. The polymer is formed by copolymerization of the following selected monomers: styrene, divinyl benzene, methyl metharcrylate, isobutyl methacrylate, n-butyl methacrylate, methacrylate, 4-vinylpridine, ethyl acrylate, butyl acrylate, acrylonitrile, glycidolmethacrylate, allyl methacrylate, methylacrylic acid, acrylic acid, vinyl acetate or perchloroethylene; the shell is polymerized by the following monomers: ethylene monomer containing a epoxy group or ethylene monomer containing a pyridyl in a side chain. The microsphere used for electronic paper in the invention has the advantages of excellent flexibility and anti-aggregation performance, thus keeping the stability of microsphere in the medium.

Description

technical field [0001] The invention relates to microspheres for electronic paper and applications thereof, in particular to polymer microspheres with monomer dyeing and inert dye embedding synthesis and surface activity and a preparation method thereof. The invention belongs to the technical field of manufacturing microspheres for electronic paper. Background technique [0002] The existing electrophoretic suspensions generally contain charge control agents and stabilizers. The charge control agent makes the surface of the particles charged and maintains the stability of the system, such as organic sulfate, sulfonate, etc.; the stabilizer makes the microcapsules wetted by the organic medium and disperses evenly in the medium, and also provides the microcapsules suspended in the dispersion system. spatial stabilization. These two additives determine that each component in the entire electrophoresis system must have certain compatibility. [0003] At present, the microcaps...

Claims

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Application Information

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IPC IPC(8): C08F212/02C08F220/10C08F226/06C08F220/44C08F220/06C08F218/08C08F214/04C08F2/22C08F2/44C08F2/12C08F8/00C08K5/00G09F9/37G02F1/167
Inventor 冯宇光黄世华滕枫
Owner BEIJING JIAOTONG UNIV
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