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A polymer photonic crystal microsphere, its preparation and application

A technology of photonic crystal microspheres and polymers, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of long photonic crystal preparation cycle, large angle dependence, and single response, and achieve pure color, good repeatability, and systematic simple effect

Active Publication Date: 2019-05-14
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the object of the present invention is to provide a polymer photonic crystal microsphere, and its preparation and application, wherein the key preparation process in the preparation method is designed through the overall process flow and each reaction step The parameters and conditions of the photonic crystal are improved, and at the same time, the principle of microfluidics and polymer self-assembly is used, and the two are organically combined. Compared with the existing technology, it can effectively solve the problem of long photonic crystal preparation cycle, cumbersome process, complex system and responsive Single, large angle-dependent problems, the polymer photonic crystal microspheres in the present invention are responsive to organic solvents, pH values ​​and ion species; and, the block copolymer PS- b-P2VP, its chain segments are arranged in the form of multiple layered structures surrounding the center of the microsphere, that is, an ordered layered structure is formed in the photonic crystal microsphere, and the response of the polymer photonic crystal microsphere Sex matters

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  • A polymer photonic crystal microsphere, its preparation and application
  • A polymer photonic crystal microsphere, its preparation and application
  • A polymer photonic crystal microsphere, its preparation and application

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preparation example Construction

[0055] The polymer photonic crystal microspheres provided by the present invention have a single color. In buffer solutions of different pH values, different ions or specific organic solvents of different concentrations, the reflected light wavelength shifts greatly, showing a reflection mode microscope Visible color changes. The preparation method of polymer photonic crystal microspheres provided by the present invention includes the following steps:

[0056] (1) Preparation of solution: fully dissolve the block copolymer PS-b-P2VP in an organic solvent (such as chloroform) to obtain the dispersed phase of the microfluidic system; dissolve the surfactant polyvinyl alcohol (PVA) in the Ionized water to obtain the continuous phase of the microfluidic system; dissolve the surfactant cetyltrimethylammonium bromide (CTAB) in deionized water to obtain an annealing external environment solution; the dispersed phase of the PS-b-P2VP solution The concentration is 1-15 mg / mL, the continu...

Embodiment 1

[0071] The polymer photonic crystal microspheres in this embodiment were prepared as follows:

[0072] (1) Preparation of the required solution: fully dissolve the block copolymer PS-b-P2VP in an organic solvent to obtain the dispersed phase of the microfluidic system; dissolve the surfactant PVA in deionized water to obtain the microfluidic The continuous phase of the system; dissolve the surfactant CTAB in deionized water to obtain an annealing external environment solution; the concentration of the dispersed phase PS-b-P2VP solution is 1 mg / mL, and the continuous phase PVA solution is 0.5 mg / mL, annealing The concentration of CTAB solution in the external environment is 5 mg / mL.

[0073] (2) Preparation of microfluidic chip: the chip includes inner tubes 1 and 2, outer tube and outer tube sampling head; two inner tubes and outer tube are sleeved with a common central axis; one end of inner tube 1 is pointed and extends into the outer tube The inside of the tube to the center, t...

Embodiment 2

[0077] The polymer photonic crystal microspheres in this embodiment were prepared as follows:

[0078] (1) Preparation of the required solution: fully dissolve the block copolymer PS-b-P2VP in an organic solvent to obtain the dispersed phase of the microfluidic system; dissolve the surfactant PVA in deionized water to obtain the microfluidic The continuous phase of the system; dissolve the surfactant CTAB in deionized water to obtain the annealing external environment solution; each milliliter of dispersed phase solution contains 5mg of PS-b-P2VP, each milliliter of continuous phase solution contains 3mg of PVA, and each milliliter of annealing external environment solution contains CTAB 3mg.

[0079] (2) Preparation of microfluidic chip: the chip includes inner tubes 1 and 2, outer tube and outer tube sampling head; two inner tubes and outer tube are sleeved with a common central axis; one end of inner tube 1 is pointed and extends into the outer tube From the inside to the cente...

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Abstract

The invention discloses a polymer photonic crystal microsphere, and a preparation method and application thereof. The preparation method particularly comprises the steps of firstly taking a PS-b-P2VP solution as a dispersion phase of a micro-fluidic system, taking a PVA (Poly Vinyl Alcohol) solution as a continuous phase of the micro-fluidic system, taking a micro-fluidic chip with a special structure to obtain polymer emulsion drops which are good in dispersity and uniform in size, and then volatilizing the solvent in the drops to obtain a polymer microsphere; then, taking a CTAB (Cetyl Trimethyl Ammonium Bromide) solution as annealing external environment to carry out annealing treatment on the polymer microsphere; and finally obtaining a block polymer photonic crystal microsphere. In the invention, the polymer photonic crystal microsphere has a sequential stratified structure, has organic solvent responsiveness, pH value responsiveness and ion species responsiveness, and can effectively solve the problems that a current photonic crystal is long in preparation period, tedious in process, complex in system, single in responsiveness and large in angle dependence.

Description

Technical field [0001] The present invention belongs to the field of photonic crystal materials. More specifically, it relates to a polymer photonic crystal microsphere, and its preparation and application. The polymer photonic crystal microsphere is a kind of responsive polymer photonic crystal microsphere that can respond to specific Organic solvents, pH and ions have multiple responses. Background technique [0002] A photonic crystal is a periodic structure composed of materials with different refractive indexes alternately in space. Its most fundamental feature is that it has a photonic band gap, that is, light whose wavelength falls within its band gap is prohibited from propagating and reflecting, thus showing The color of light of this wavelength. Due to its unique optical properties, photonic crystals are widely used in a variety of optical devices (such as modulators, sensors, displays, etc.). [0003] The internal structure of photonic crystals in the traditional sense...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/08C08J7/00C08J3/12C08L29/04G01N21/25
CPCC08J3/12C08J7/08C08J2325/08C08J2429/04C08L25/08G01N21/25C08L29/04
Inventor 朱锦涛杨一许江平王珂
Owner HUAZHONG UNIV OF SCI & TECH
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