Method for preparing structural color material for three-dimensional printing

A technology of three-dimensional printing and structural color, which is applied in the direction of additive processing, etc., can solve the problems of peeling, lack of color types, easy fading, etc., and achieve the effect of bright colors

Inactive Publication Date: 2016-11-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a three-dimensional printing structural color material based on photonic crystal hydrogel and its preparation method, which solves the shortcomings of lack of color types, easy fading and peeling in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Purification of nanoparticles:

[0026] The Stöber method (Stöber, W.; Fink, A.; Bohn, E. Controlled Growth of Monodisperse Silica Spheres in the Micron Size Range. Journal of Colloid and Interface Science 1968, 26, 62–69) with improved technology was used to prepare well-monodispersed For silica particles, the particle size of silica nanoparticles used is 150 nanometers; first, centrifuge at 8000 rpm for 15 minutes with a high-speed centrifuge to precipitate colloidal particles, and discard the supernatant; after diluting with deionized water, use The sonicator ultrasonically disperses the aggregated colloids; repeat this step 8-10 times until the colloidal nanoparticles at the bottom of the test tube after centrifugation show an obvious rainbow color. Secondly, disperse and centrifuge the purified colloidal particles and transfer the suspension to a polyethylene test tube, add ion exchange resin for ion exchange for about 1 h, and obtain a non-close-packed colloid...

Embodiment 2

[0032] (1) Purification of nanoparticles:

[0033] Using directly purchased dry silica powder, the particle size of the nanoparticles is 100 nanometers. Weigh 2 dry powders, dissolve them in 100 ml of ethanol solution, and ultrasonicate overnight to make them evenly dispersed.

[0034] (2) Preparation of photonic crystal hydrogel solution:

[0035] Add 2 mL of ethoxylated trimethylolpropane triacrylate to the well-monodispersed silica ethanol solution, and sonicate overnight to make it uniformly dispersed. The solution is placed in an oven at 70 degrees Celsius, and the ethanol in it is gradually volatilized to obtain a photonic crystal hydrogel solution with structural color.

[0036] (3) Selection of initiator:

[0037] Add photoinitiator 2-hydroxy-2-methyl-1-phenyl-1-propanone to the prepared photonic crystal solution, the volume fraction is 1%. Ultrasonic dispersion, protected from light. During the printing process, an ultraviolet lamp (wavelength 365 nm) is used for...

Embodiment 3

[0039] (1) Purification of nanoparticles:

[0040] The well-monodispersed silica particles were prepared by the improved Stöber method, and the particle size of the silica nanoparticles used was 150 nanometers. First, centrifuge at 8,000 rpm for 15 minutes with a high-speed centrifuge to precipitate colloidal particles, and discard the supernatant. After dilution with deionized water, the aggregated colloids were dispersed by ultrasonication. Repeat this step 8-10 times until the colloidal nanoparticles at the bottom of the tube after centrifugation show a clear iridescent color. Secondly, disperse and centrifuge the purified colloidal particles and transfer the suspension to a polyethylene test tube, add ion exchange resin for ion exchange for about 1 h, and obtain a non-close-packed colloidal crystal solution with rainbow luster. Take 100 microliters of the colloidal solution and dry it in an oven at 70 degrees Celsius until the mass does not change. Weigh the mass of the ...

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Abstract

The invention discloses a structural color material for three-dimensional printing and a method for preparing the structural color material for three-dimensional printing. The structural color material is essentially photonic crystal hydrogel and characterized in that in the photonic crystal hydrogel, monodispersed nano particles are dispersed in hydrogel precursor solution to form photonic crystal hydrogel solution with structural color by regulation, and the photonic crystal hydrogel solution serves as three-dimensional printing ink to realize rapid prototyping of printed objects by selection of a corresponding curing method. The preparation method is simple in process, and the structural color material is low in cost, bright in coloring, less prone to fading, suitable for various types of three-dimensional printing systems, applicable to decoration and optical device processing, bionic device manufacturing and the like and extensive in practicability.

Description

technical field [0001] The invention relates to the field of three-dimensional printing rapid prototyping, in particular to a method for preparing a photonic crystal hydrogel-based three-dimensional printing structural color material. Background technique [0002] 3D printing is a technology that uses bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing based on digital model files. The printer reads the cross-sectional information in the file, prints these cross-sections layer by layer with liquid, powdery or sheet materials, and then glues the cross-sections of each layer in various ways to create an entity. Depending on the base material, corresponding buildup techniques can be selected, such as selective laser sintering, fused deposition modeling, fused filament fabrication, etc. Traditional 3D printing relies on the material itself and the addition of pigments in terms of color selection, or further paint processing in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/02C08K3/36C08F122/14C08F122/38B33Y70/00
CPCB33Y70/00C08F122/1006C08F122/38C08K3/36C08K2201/011C08L71/02
Inventor 赵远锦丁海波顾洪成刘慈慧顾忠泽
Owner SOUTHEAST UNIV
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