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Bistable photonic crystal color electronic ink material and preparation and application thereof

A technology of electronic ink and photonic crystal, which is applied in optics, nonlinear optics, instruments, etc., can solve the problems that electronic ink cannot realize stable display without electric field, achieve the advantages of color saturation and permeability, and controllable electric field control The effect of high stability and simple preparation process

Pending Publication Date: 2022-03-15
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, conventional electro-responsive photonic crystals require continuous application of an electric field to maintain image display, and cannot achieve stable display of electronic ink without an electric field.

Method used

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  • Bistable photonic crystal color electronic ink material and preparation and application thereof
  • Bistable photonic crystal color electronic ink material and preparation and application thereof
  • Bistable photonic crystal color electronic ink material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1 Red SiO regulated by electric field 2 Preparation of PCb-EG-PEG bistable photonic crystal color electronic ink material

[0053] Such as figure 2 a, 2d, 2g shown, using Monodisperse SiO with an average particle size of 199 nm prepared by the method 2 Colloidal particles, disperse 30 μL of the above colloidal particles in 1100 μL ethanol solution, add 5 μL polyethylene glycol with a molecular weight of 20,000, 60 μL propylene carbonate and 5 μL ethylene glycol, and ultrasonically mix to form a homogeneous solution. The mixed solution was heated in an oven at 90° C. for 2 hours to volatilize and remove ethanol in the solution, and 100 μL of a bistable photonic crystal color electronic ink material with a red structural color was prepared.

[0054] The prepared electronic ink material is packaged in two pieces of ITO conductive glass, and a 50 μm double-sided adhesive is used as a spacer to prepare a red photonic crystal electronic ink display device with bi...

Embodiment 2

[0056] Embodiment 2 Green SiO regulated by electric field 2 Preparation of PCb-EG-PEG bistable photonic crystal color electronic ink material

[0057] Such as figure 2 b, as shown in 2e and 2h, using Monodisperse SiO with an average particle size of 169 nm prepared by the method 2 Colloidal particles, disperse 30 μL of the above colloidal particles in 1100 μL ethanol solution, add 5 μL polyethylene glycol with a molecular weight of 20,000, 60 μL propylene carbonate and 5 μL ethylene glycol, and ultrasonically mix to form a homogeneous solution. The mixed solution was heated in an oven at 90° C. for 2 hours to volatilize and remove the ethanol in the solution, and 100 μL of a bistable photonic crystal color electronic ink material with a green structural color was prepared.

[0058] The prepared electronic ink material is packaged in two pieces of ITO conductive glass, and a 50 μm double-sided adhesive is used as a spacer to prepare a green photonic crystal electronic ink ...

Embodiment 3

[0060] Example 3 Blue SiO regulated by electric field 2 Preparation of PCb-EG-PEG bistable photonic crystal color electronic ink material

[0061] Such as figure 2 As shown in c, 2f, 2i, using Monodisperse SiO with an average particle size of 138 nm prepared by the method 2 Colloidal particles, disperse 30 μL of the above colloidal particles in 1100 μL ethanol solution, add 5 μL polyethylene glycol with a molecular weight of 20,000, 60 μL propylene carbonate and 5 μL ethylene glycol, and ultrasonically mix to form a homogeneous solution. The mixed solution was heated in an oven at 90° C. for 2 hours to volatilize and remove ethanol in the solution, and 100 μL of bistable photonic crystal color electronic ink material with blue structural color was prepared.

[0062] The prepared electronic material ink is packaged in two pieces of ITO conductive glass, and a 50 μm double-sided adhesive is used as a spacer to prepare a blue photonic crystal electronic ink display device wi...

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Abstract

The invention discloses a colored electronic ink material based on bistable photonic crystals. The photonic crystal colored electronic ink material is mainly composed of nano colloidal particles with charges on the surface, an electrophoresis dispersion liquid and a polymer additive. Colloidal crystals are formed by spontaneous precipitation of the colloidal particles, so that first steady-state display of ordered arrangement of the colloidal particles and structural color can be realized. The viscous resistance of movement of the colloidal particles is increased by introducing a polymer into a dispersion medium, and the stronger coulomb repulsive interaction among the colloidal particles after lattice collapse is balanced, so that colorless and transparent second steady-state display under disordered accumulation of the colloidal particles is realized. The two kinds of steady state display do not need to be maintained by external voltage, rapid reversible conversion can be achieved by applying short forward voltage and backward voltage, and the method is suitable for developing the electronic ink display technology based on the photonic crystal.

Description

technical field [0001] The invention belongs to the application field of photonic crystal materials and the technical field of electronic ink, and specifically relates to a bistable photonic crystal color electronic ink material and its preparation and application. Background technique [0002] Electronic ink is a new type of dynamic display technology that develops color through colloidal particles, has bistable or multi-stable states, and is controlled by an electric field. It is widely used in display devices such as electronic readers, electronic tags, and bus stop signs. As early as 1998, Joseph Jacobson and others encapsulated black and white colloidal particles in microcapsules for the first time. When the forward and reverse electric fields act on the electronic ink, the colloidal particles with different surface charges will be attracted by electrostatic attraction. Electrophoresis to the vicinity of the corresponding electrodes, so that the electronic ink presents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/167
CPCG02F1/167G02F2001/1678
Inventor 葛建平傅茜茜
Owner EAST CHINA NORMAL UNIV
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