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, micr

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

Example Embodiment

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

[0033] Using the method of the present invention to prepare Janus droplets, the specific steps are as follows:

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

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

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

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

Example Embodiment

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

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

[0041] (2) Pour the hydrogel in step (1) of Example 1 into a rectangular parallelepiped plastic container as a matrix, use a syringe to suck up the mixture in step (2) above, and then place it on the syringe pump, and use a PE tube to transfer the syringe Connect with the printing nozzle and immerse the printing nozzle in the hydrogel matrix.

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

Example Embodiment

[0043] Example 3: Controlling the structural color of Janus droplets

[0044] (1) The change of Janus droplet structure is mainly affected by interfacial tension, which follows the principle of interfacial stability, that is, minimizes interfacial energy. Non-ionic 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 cross-experimental groups. The method in Example 1 prepares the Janus drop, and observes the structure and morphology of the obtained Janus drop, as attached Figure 5 As shown, the results show that the structure of Janus droplets can be adjusted by adjusting the proportion of nonionic surfactant in the hydrogel, thereby adjusting the structure color...

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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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