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Wide-visual-angle colloid crystal film and preparation method thereof

A technology of colloidal crystals and wide viewing angles, which is applied in the field of colloidal crystal films with wide viewing angles and its preparation, can solve the problems of widened reflection peaks, color brightness, decline, unfavorable applications, etc., to reduce the difference in viewing angles, structural color Brilliant, cheap-to-prepare results

Inactive Publication Date: 2013-06-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above materials solve the viewing angle problem of colloidal crystals, these materials all use the sacrifice of order to obtain their angular unbiasedness.
In practical applications, the reduction of the order of colloidal crystals will lead to the broadening of reflection peaks and the decline of color brightness, which are not conducive to its application in display and sensing.

Method used

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  • Wide-visual-angle colloid crystal film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Preparation of colloidal crystal gel film with wide viewing angle of spherical opal structure

[0037] 1. Preparation of colloidal crystal microspheres 1

[0038] The monodispersed 280 nm silica colloidal particles were purified by centrifugation, and the mass percentage of colloidal nanoparticles in the colloidal particle solution was adjusted to 20%. After ultrasonic dispersion, it was used as the water phase in the microfluidics. The external phase is n-hexadecane containing surfactant. The generated droplets were collected, and after being heated and solidified, they were put into a muffle furnace for calcination at 800°C to improve the stability of the microspheres.

[0039] 2. Gel immobilization to prepare colloidal crystal film with wide viewing angle

[0040] After the prepared colloidal crystal microspheres 1 were treated with plasma for hydrophilization for 3 min, they were added to the mixed solution of acrylamide and methylenebisacrylamide (29:1 ...

Embodiment 2

[0042] Example 2 Preparation of Colloidal Crystal Gel Film with Spherical Inverse Opal Structure and Wide Viewing Angle

[0043] 1. Preparation of colloidal crystal microspheres 1

[0044]The monodisperse 200 nm silica colloidal particles were purified by centrifugation, and the mass percentage of colloidal nanoparticles in the colloidal particle solution was adjusted to 35%. After ultrasonic dispersion, it was used as the water phase in the microfluidics. The external phase is silicone oil containing surfactant. The generated droplets were collected, heated and solidified, washed, and then put into a muffle furnace for calcination at 800°C to improve the stability of the microspheres.

[0045] 2. Gel immobilization to prepare colloidal crystal film with wide viewing angle

[0046] After the prepared colloidal crystal microsphere 1 was treated overnight with isoconcentrated sulfuric acid hydrogen peroxide (7:3), 15% polyethylene glycol diacrylate containing photoinitiator HM...

Embodiment 3

[0048] Example 3 Preparation of agarose colloidal crystal gel film with wide viewing angle

[0049] 1. Preparation of colloidal crystal gel microspheres

[0050] The monodisperse 180 nm polystyrene colloidal particles were centrifuged and purified, and the mass percentage of colloidal nanoparticles in the colloidal particle solution was adjusted to 30%, which was used as the aqueous phase after ultrasonic dispersion. Using n-hexadecane containing surfactant as the oil phase, it is emulsified into liquid droplets by direct stirring method, after being heated and solidified and washed, it is put into a muffle furnace for calcination at 800°C to improve the stability of the microspheres.

[0051] 2. Preparation of colloidal crystal film with wide viewing angle by adsorption method

[0052] After the prepared colloidal crystal microspheres 1 were treated with plasma hydrophilicity for 4 min, they were soaked in a certain concentration of agarose gel solution and kept in a water b...

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Abstract

The invention discloses a wide-visual-angle colloid crystal film. The wide-visual-angle colloid crystal film comprises a plurality of structure units, wherein the structure units are monodispersed colloid crystal microspheres; and the colloid crystal microspheres are spherical opal structural photonic crystals or spherical inverse opal structural photonic crystals. The invention also discloses a method for preparing the wide-visual-angle colloid crystal film. By adopting the mode, the wide-visual-angle colloid crystal film disclosed by the invention is not changed with the change of an observing visual angle in color and has the advantages of bright color, low preparation cost, and the like.

Description

technical field [0001] The invention relates to the field of colloidal crystals, in particular to a colloidal crystal film with a wide viewing angle and a preparation method thereof. Background technique [0002] Colloidal crystals are a class of substances with a two-dimensional or three-dimensional ordered structure formed by the assembly of one or more monodisperse colloidal particles. Generally, colloidal crystals include opal-like structures and colloidal crystal structures formed by the self-assembly of polymer colloidal particles in a narrow sense. In colloidal crystals, it is the colloidal particles that occupy each lattice point, rather than the molecules, atoms or ions in the usual crystals. Due to the long-range ordered arrangement of colloidal particles, colloidal crystals have a photonic band gap. The photonic band gap follows the Bragg diffraction formula, that is, mλ=2ndsinθ, where m is the diffraction order, λ is the diffraction wavelength, n is the average...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00
Inventor 赵远锦叶宝芬顾洪成商珞然顾忠泽
Owner SOUTHEAST UNIV
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