Photonic crystal capsules with electro-optical response characteristics and preparation method therefor
A technology of photonic crystals and response characteristics, applied in microcapsule preparation, microsphere preparation, optics, etc., can solve the problems of short service life, unstable physical and chemical properties, etc., and achieve extended service life, efficient packaging, and uniform size controllable effect
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[0025] The invention provides a method for preparing a photonic crystal capsule with electro-optic response characteristics, which is characterized in that it comprises the following steps:
[0026] Using microfluidic technology, the oil phase composed of one-dimensional photonic crystal and oil-soluble polymer precursor is used as the dispersed phase, the water phase composed of surfactant and ultrapure water is used as the continuous phase, and the water-soluble polymer precursor is used as the continuous phase. The water phase composed of , surfactant and ultrapure water is the collection phase, and the oil-soluble polymer precursor in the oil phase and the water-soluble polymer precursor in the collection phase undergo interfacial polymerization at the oil-water interface to form polymer capsules that wrap photonic crystals wall, to obtain photonic crystal capsule ink.
[0027] The invention adopts the microfluidic technology to prepare the photonic crystal capsule, wherei...
Embodiment 1
[0054] (1) Preparation of the oil phase in the microchannel
[0055] The selected one-dimensional photonic crystal is a chiral nematic liquid crystal of BHR-59001 and a chiral dopant of S-811, wherein the chiral dopant accounts for the mass of the one-dimensional photonic crystal The percentage is 28.5 wt%, and the oil-soluble polymeric precursor is tetraethylenepentamine (TEPA). Wherein, the reflection wavelength of the photonic crystal is at 460nm, and the mass percentage of TEPA in the oil phase is 2%. After the two are mixed, heat to 80°C and stir electromagnetically until the two are completely co-dissolved to form a uniform and stable oil phase.
[0056] (2) Preparation of the aqueous phase in the microchannel
[0057] The selected surfactant in the water phase is sodium lauryl sulfate. The mass percent of the surfactant in the water phase is 4%. Mix TDI and ultrapure water and ultrasonicate for 30 minutes until the two are completely co-dissolved to form a uniform a...
Embodiment 2
[0067] (1) Preparation of the oil phase in the microchannel
[0068] The selected one-dimensional photonic crystal is a chiral nematic liquid crystal of 5CB and a chiral dopant of S-811, wherein the mass percentage of the chiral dopant in the one-dimensional photonic crystal is 26.2 wt%, the oil-soluble polymeric precursor is tetraethylenepentamine (TEPA). Wherein, the reflection wavelength of the photonic crystal is at 550nm, and the mass percentage of TEPA in the oil phase is 3%. After the two are mixed, heat to 80°C and stir electromagnetically until the two are completely co-dissolved to form a uniform and stable oil phase.
[0069] (2) Preparation of the aqueous phase in the microchannel
[0070] The selected surfactant in the water phase is sodium lauryl sulfate. The mass percent of the surfactant in the water phase is 5%. Mix TDI and ultrapure water and ultrasonicate for 30 minutes until the two are completely co-dissolved to form a uniform and stable aqueous phase....
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