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Preparation method for core-shell TiO2-SiO2 microsphere self-assembled structural color film

A technology of structural color and self-assembly, applied in microsphere preparation, dyeing method, microcapsule preparation, etc., can solve the problems of complex preparation process, uncontrollable, unable to control the effect of structural color film, etc.

Inactive Publication Date: 2017-02-22
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of this method is complex and cannot be used for TiO 2 -SiO 2 The particle size of the microspheres is controlled, so that the effect of the structural color film formed by its self-assembly cannot be controlled

Method used

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  • Preparation method for core-shell TiO2-SiO2 microsphere self-assembled structural color film
  • Preparation method for core-shell TiO2-SiO2 microsphere self-assembled structural color film
  • Preparation method for core-shell TiO2-SiO2 microsphere self-assembled structural color film

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preparation example Construction

[0030] The invention provides a core-shell TiO 2 -SiO 2 The preparation method of microsphere self-assembled structural color thin film comprises the following steps:

[0031] (1) Mix ethyl orthosilicate, ethanol, ammonia water and water under stirring conditions to obtain a first suspension, and separate the first suspension from solid-liquid to obtain silica microspheres;

[0032] (2) Mix the silica microspheres, ethanol, ammonia, and tetrabutyl titanate under stirring conditions to obtain a second suspension, and separate the second suspension from solid-liquid to obtain core-shell TiO 2 -SiO 2 Microspheres;

[0033] (3) the core-shell TiO 2 -SiO 2 The microspheres were mixed with ethanol and ultrasonically dispersed to obtain TiO 2 -SiO 2 Ethanol dispersion of microspheres;

[0034] The TiO 2 -SiO 2 The ethanol dispersion of the microspheres was dried to obtain the core-shell TiO 2 -SiO 2 Microsphere Self-Assembled Structural Chromatic Thin Films.

[0035] In ...

Embodiment 1

[0054] Dissolve 3mL tetraethyl orthosilicate in 30mL ethanol, stir magnetically for 20min to obtain solution A; mix 5mL ammonia water, 27mL distilled water and 35mL absolute ethanol, and magnetically stir for 20min to obtain solution B; add A dropwise to B, and Stir at 30°C for 3 hours to obtain the first suspension, control the magnetic stirring speed to 18 rpm, centrifuge the first suspension, wash the solid with distilled water and ethanol, repeat the centrifugation for 3 times, and dry the obtained solid to obtain SiO 2 Microspheres;

[0055] Ultrasonically disperse 0.3g of silica microspheres in 100mL of ethanol for 20min, add 0.4mL of ammonia and stir magnetically for 30min; take 0.5mL of tetrabutyl titanate dropwise into the above solution, and continuously magnetically Stir for 20 hours to obtain the second suspension, control the magnetic stirring speed to 20 rpm, centrifuge the second suspension, wash the solid with distilled water and ethanol, and repeat the centrif...

Embodiment 2

[0060] Dissolve 2 mL of tetraethyl orthosilicate in 30 mL of ethanol, and stir magnetically for 20 minutes to obtain solution A; mix 5.5 mL of ammonia water, 27.5 mL of distilled water and 35 mL of absolute ethanol, and magnetically stir for 20 minutes to obtain solution B; add A dropwise to B , stirred at 50°C for 3h to obtain the first suspension, controlled the magnetic stirring speed to 18 rev / s, centrifuged the first suspension, washed the solid with distilled water and ethanol, repeated centrifugal washing for 3 times, and centrifuged the obtained solid Drying, that is, silica microspheres;

[0061] Take SiO 2 Ultrasonic dispersion of 0.3g of microspheres in 100mL of ethanol, ultrasonic dispersion time of 15min, adding 0.3mL of ammonia water and magnetic stirring for 30min, taking 0.3mL of tetrabutyl titanate dropwise into the above solution, continuous magnetic stirring at 45°C for 24h, to obtain For the second suspension, the magnetic stirring speed is controlled to b...

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Abstract

The invention discloses a preparation method for a core-shell TiO2-SiO2 microsphere self-assembled structural color film. The preparation method comprises the steps that tetraethylortho silicate, ethyl alcohol, ammonia water and water are mixed and then stirred, and a first suspension liquid is obtained; the first suspension liquid is centrifuged to obtain silicon dioxide microspheres; the silicon dioxide microspheres, ethyl alcohol, ammonia water and tetrabutyl titanate are stirred after being mixed, and a second suspension liquid is obtained, and core-shell TiO2-SiO2 microspheres are obtained after the second suspension liquid is centrifuged; the core-shell TiO2-SiO2 microspheres and ethyl alcohol are mixed, then ultrasonic dispersion is conducted to obtain an ethanol dispersion solution of the TiO2-SiO2 microspheres, and the core-shell TiO2-SiO2 microsphere self-assembled structural color film is obtained after the ethanol dispersion solution of the TiO2-SiO2 microspheres is dried. The preparation method is simple, the core-shell TiO2-SiO2 microspheres in different particle sizes can be obtained through control over the raw material ratio and reacting conditions, and therefore the structural color films in different colors are assembled.

Description

technical field [0001] The invention relates to the technical field of a structural color thin film, in particular to a core-shell TiO 2 -SiO 2 Preparation method of microsphere self-assembled structural color thin film. Background technique [0002] Structural color is the color produced by physical effects such as reflection, diffraction, and interference of light due to the existence of the structure of the object itself. Structural color is a color that can be produced without dyes and pigments. Its essence is the visual effect produced by the scattering, diffraction and interference of light by the special organizational structure inside the material. Using colloidal microspheres as structural units to form structural color films on the surface of substrates by self-assembly method has been extensively studied in recent years due to the advantage of not requiring chemical colorants such as dyes. [0003] The material of the core-shell structure is a composite materia...

Claims

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Application Information

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IPC IPC(8): B01J13/02C09C1/36C09C3/06D06P1/673
CPCB01J13/02C09C1/3661C09C3/063D06P1/673D06P1/67383
Inventor 崔永明乔路李意蔡映杰陈悟陈洪高
Owner WUHAN TEXTILE UNIV
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