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A janus droplet with structural color based on 3D droplet printing and its preparation method

A technology of structural color and liquid droplets, applied in 3D object support structures, manufacturing tools, additive manufacturing, etc., can solve the lack of control of Janus droplets in microfluidic technology, the inability to control the orientation and spatial arrangement of Janus droplets, and the limitation of optics The development and application of features and other issues, to achieve the effect of high application value

Active Publication Date: 2021-05-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, microfluidic technology lacks subsequent regulation of Janus droplets
Taking the above-mentioned Janus droplets with ring-shaped structural color as an example, microfluidic technology cannot control the orientation and spatial arrangement of Janus droplets, which greatly limits the development and application of its optical properties.

Method used

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  • A janus droplet with structural color based on 3D droplet printing and its preparation method
  • A janus droplet with structural color based on 3D droplet printing and its preparation method
  • A janus droplet with structural color based on 3D droplet printing and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Example 1: Preparation of Janus droplets with structural color

[0033] Adopt the method of the present invention to prepare Janus droplet, concrete steps are as follows:

[0034] (1) Carbomer 940, nonionic surfactant X-100, FS-30 are dissolved in water, the concentration of carbomer is 0.07wt%, the concentration of X-100 is 0.05wt%, the concentration of FS-30 The concentration was 1.5 wt%, and then 10 wt% NaOH solution was added to adjust the pH of the solution to 7 to obtain a clear hydrogel.

[0035] (2) Mix n-hexane and perfluorohexane at a volume ratio of 4:11 at high temperature to obtain a miscible mixture.

[0036] (3) Pour the hydrogel in step (1) into a rectangular parallelepiped plastic container as a matrix, use a syringe to absorb the mixed solution in step (2), then place it on the syringe pump, use PE tube to connect the syringe to the printing nozzle Connect, and immerse the print nozzle into the hydrogel matrix.

[0037] (4) By writing a digital mode...

Embodiment 2

[0039] Example 2: Preparation of a color pattern composed of Janus droplets with structural color

[0040] (1) According to the method in Example 1, n-hexane and perfluorohexane were mixed at a volume ratio of 1:1 at high temperature to obtain a miscible mixed solution.

[0041] (2) Pour the hydrogel in step (1) of Example 1 into a rectangular parallelepiped plastic container as a base, draw the mixed solution in the above step (2) with a syringe, then place it on a syringe pump, and use a PE tube to put the syringe Connect to the print nozzle and immerse the print nozzle into the hydrogel matrix.

[0042] (3) Customize the printing pattern by designing the digital model and generate the G-code code. Then, the path is printed by a 3D printer to obtain a droplet pattern, and the container is placed in a freezer to cool down rapidly, and the two oil phases are separated to form a customized color pattern composed of Janus droplets with structural color, as shown in the attached ...

Embodiment 3

[0043] Embodiment 3: Janus droplet structural color color control

[0044] (1) The change of Janus droplet structure and morphology is mainly affected by interfacial tension, which follows the principle of interface stability, that is, the minimization of interface energy. Nonionic surfactants X-100 and FS-30 can change the surface tension of fluorocarbons and hydrocarbons, and achieve a specific Janus two-phase interface morphology through a certain ratio of the two surfactants.

[0045] (2) Configure FS-30 with concentrations of 1.3wt%, 1.5wt%, and 1.7wt%, and X-100 with concentrations of 0.03wt%, 0.05wt%, and 0.08wt%, respectively, and set up several crossover experimental groups, according to The method in embodiment 1 prepares described Janus droplet, observes the structural form of the Janus droplet obtained, as attached Figure 5 As shown, the results indicate that the structure of Janus droplets can be tuned by adjusting the ratio of nonionic surfactants in the hydrog...

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Abstract

The invention discloses a Janus droplet with structural color based on 3D droplet printing and a preparation method thereof. The hydrogel with shear-thinning property is used as the matrix, and the two oil phases that are mutually soluble at high temperature and phase-separated at low temperature are used as the dispersed phase. The injection pump is controlled by a 3D printer, and the dispersed phase at high temperature is injected into the matrix to form Droplets, and by lowering the temperature, induce phase separation of the two oil phases to form Janus droplets. Because the two oil phases have different refractive indices, the incident light can interfere at the interface, showing a ring-shaped structural color. The structural color of Janus droplets can be tuned by the type or ratio of non-ionic surfactants in the hydrogel, while its position and size can be precisely controlled by 3D printing, and a colorful pattern composed of Janus droplets can be generated, which is in the functional Display, sensing and other fields have high application value.

Description

technical field [0001] The invention relates to the field of Janus droplets, in particular to a method for preparing Janus droplets with structural colors based on a 3D droplet printer. Background technique [0002] Janus droplets are composed of two parts with different chemical or physical properties, and the size is generally micro- or nano-scale. The anisotropic structure of Janus droplets is not only reflected in the asymmetry of chemical composition or morphology, but also in the asymmetry of function or performance. Its typical shapes are: spherical, rod-shaped, dumbbell-shaped, snowman-shaped, etc. Due to its structural asymmetry and compositional diversity, Janus droplets have some special properties such as optical and electric field responses. For example, when a Janus droplet is composed of two liquids with different refractive indices, the incident light can interfere at the interface, resulting in brilliant ring-like patterns. Therefore, Janus droplets have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08J3/09C08J3/00B29C64/112B33Y80/00C08L33/02
CPCB33Y80/00B29C64/112C08J3/00C08J3/075C08J3/092C08J3/093C08J2333/02
Inventor 陈东胡灵杰吴柏衡孔琳琳
Owner ZHEJIANG UNIV
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