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Method for preparing color-adjustable gel photonic crystal film

A photonic crystal and gel technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of cumbersome steps, unfavorable preparation of gel photonic crystals, and high step requirements, and achieve the effect of simplifying the preparation process

Inactive Publication Date: 2015-03-04
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method first needs to prepare a colloidal crystal template with a regular structure, then fill the monomer, initiate polymerization, and remove the template. The steps required for the experimental process are cumbersome and each step requires high requirements.
Moreover, the prepared gel photonic crystals are easy to form cracks, which is not conducive to the preparation of large-area gel photonic crystals.

Method used

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  • Method for preparing color-adjustable gel photonic crystal film
  • Method for preparing color-adjustable gel photonic crystal film
  • Method for preparing color-adjustable gel photonic crystal film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Preparation of precursor solution

[0030] Take 5.0g of acrylamide, 0.050g of ammonium persulfate, 0.51g of N,N'-methylenebisacrylamide, and 30ml of secondary water, dissolve and mix them evenly on a magnetic stirrer.

[0031] 2. Mixing of PS emulsion and precursor solution

[0032] The PS emulsion with a monodispersity coefficient of 0.005 (solid content 1.5%, particle size 181nm) was mixed with the precursor solution at a volume ratio of 10:1, and further ultrasonically dispersed.

[0033] 3. Preparation of colloidal crystal template and polymer composite structure

[0034] Put the slide glass that has been treated with hydrophilicity vertically into the mixed solution prepared in step (2), and carry out PS colloidal crystal self-assembly and The hydrogel monomers were polymerized, removed after 50 hours, and then sintered at 100°C for 20 minutes to increase its strength.

[0035] 4. Preparation of Inverse Opal Gel Photonic Crystal Film

[0036] Soak the compos...

Embodiment 2

[0038] 1. Preparation of precursor solution

[0039] Take 5.0g of acrylamide, 0.050g of ammonium persulfate, 0.51g of N,N'-methylenebisacrylamide, and 30ml of secondary water, dissolve and mix them evenly on a magnetic stirrer.

[0040] 2. Mixing of PS emulsion and precursor solution

[0041] The PS emulsion with a monodispersity coefficient of 0.005 (solid content 2.8%, particle size 270nm) was mixed with the precursor solution at a volume ratio of 6:1, and further ultrasonically dispersed.

[0042] 3. Preparation of colloidal crystal template and polymer composite structure

[0043] Put the slide glass that has been treated with hydrophilicity vertically into the mixed solution prepared in step (2), and carry out PS colloidal crystal self-assembly and The hydrogel monomers were polymerized, removed after 50 hours, and then sintered at 100°C for 20 minutes to increase its strength.

[0044] 4. Preparation of Inverse Opal Gel Photonic Crystal Film

[0045] Soak the composi...

Embodiment 3

[0047] 1. Preparation of precursor solution

[0048] Take 5.0g of acrylamide, 0.050g of ammonium persulfate, 0.51g of N,N'-methylenebisacrylamide, and 30ml of secondary water, dissolve and mix them evenly on a magnetic stirrer.

[0049] 2. Mixing of PS emulsion and precursor solution

[0050] The PS emulsion with a monodispersity coefficient of 0.005 (solid content 3.7%, particle size 325nm) was mixed with the precursor solution at a volume ratio of 4:1, and further ultrasonically dispersed.

[0051] 3. Preparation of colloidal crystal template and polymer composite structure

[0052]Put the slide glass that has been treated with hydrophilicity vertically into the mixed solution prepared in step (2), and carry out PS colloidal crystal self-assembly and The hydrogel monomers were polymerized, removed after 50 hours, and then sintered at 100°C for 20 minutes to increase its strength.

[0053] 4. Preparation of Inverse Opal Gel Photonic Crystal Film

[0054] Soak the composit...

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Abstract

The invention provides a method for preparing a color-adjustable gel photonic crystal film. According to the method, by strictly controlling the concentration of PS (Polystyrene) microspheres and the volume ratio of PS microspheres to a precursor solution, the matching of the self-assembly rate of the PS microspheres and the polymerization rate of the precursor solution is adjusted and controlled at a low temperature, the PS microspheres are self-assembled into gel crystals having an ordered structure and meanwhile, hydrogel particles formed by polymerization of precursor solution are filled in gaps of the gel crystals so as to form a gel crystal-hydrogel compound structure, and after PS is removed, the color-adjustable gel photonic crystal film having a reverse opal structure is formed. The gel photonic crystal film having the inverse opal structure prepared by a co-deposition method has the characteristics of regular structure and three-dimensional ordered arrangement.

Description

technical field [0001] The invention relates to a method for preparing a color-tunable gel photonic crystal film, and belongs to the technical field of photonic crystals and hydrogels. Background technique [0002] Photonic crystals are a periodic structure composed of materials with different refractive indices alternating in space. It is possible to control light of various wavelengths by changing the forbidden band. It is well known that when the hydrogel is stimulated by temperature, pH, ionic strength, etc., its structure and energy state will change, manifested as swelling or shrinking. In recent years, the application of gel photonic crystals, a series of new materials that combine the characteristics of photonic crystals with the swelling and cross-linking properties of smart hydrogels, in the fields of optical switches, sensors, and ion probes has not only attracted widespread attention in the academic community. attention, and has great application prospects. Wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/58C08F212/08C08F220/06C08F220/56C08F222/38
CPCC08F2/44C08F212/08C08F220/56C30B29/58C08F220/06C08F222/385
Inventor 刘士荣刘缓缓倪忠斌陈明清
Owner JIANGNAN UNIV
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