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
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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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