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Janus liquid drop having structural color and based on 3D liquid drop printing, and preparation method of Janus liquid drop

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

Active Publication Date: 2020-05-19
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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  • Janus liquid drop having structural color and based on 3D liquid drop printing, and preparation method of Janus liquid drop
  • Janus liquid drop having structural color and based on 3D liquid drop printing, and preparation method of Janus liquid drop
  • Janus liquid drop having structural color and based on 3D liquid drop printing, and preparation method of Janus liquid drop

Examples

Experimental program
Comparison scheme
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, draw the mixed solution in step (2) with a syringe, then place it on the syringe pump, connect the syringe to the printing nozzle with a PE tube Connect, and immerse the print head into the hydrogel matrix.

[0037] (4) By writing a digital model file...

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 liquid drop having structural color and based on 3D liquid drop printing, and a preparation method of the Janus liquid drop. A hydrogel with a shear thinning property is used as a matrix, two oil phases which are mutually soluble at high temperature and separatable at low temperature are used as dispersion phases, an injection pump is controlled by a 3D printer, thedispersion phases with high temperature are injected into the matrix to form liquid drops, and the two oil phases are induced to be separated by reducing the temperature so as to the form Janus liquid drops. Due to the fact that the two oil phases have different refractive indexes, incident light can form interference between interfaces, and an annular structural color is shown. The structural colors of the Janus liquid drops can be adjusted through the type or proportion of a non-ionic surfactant in the hydrogel, the positions and sizes of the Janus liquid drops can be accurately controlledthrough 3D printing, color patterns composed of the Janus liquid drops are generated, and high application value is achieved in the fields of function display, sensing and the like.

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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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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