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A kind of photonic crystal hydrogel film and its preparation and application

A photonic crystal and hydrogel technology, applied in the measurement of phase influence characteristics, can solve the problems of high detection accuracy, cumbersome operation, and expensive formaldehyde detection, and achieve the effects of high stability, stable quality, and short preparation time.

Active Publication Date: 2018-05-11
HUAZHONG UNIV OF SCI & TECH +1
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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 purpose of the present invention is to provide a photonic crystal hydrogel film and its preparation and application, wherein the type and size of the key doped particles in the photonic crystal hydrogel film , the amount of addition and its distribution, and the overall design of the key flow process in the corresponding preparation method, the reaction parameter conditions of each step (including the type and proportion of reactants, reaction temperature and time, etc.) are improved, and compared with the existing technology Compared with effectively solving the problem of expensive and cumbersome detection of formaldehyde, it provides a new way for the detection of formaldehyde in the solution. The photonic crystal hydrogel film is cheap and easy to operate when applied to the naked eye detection of formaldehyde, and the photonic crystal The hydrogel film has good specificity for formaldehyde and high detection accuracy

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  • A kind of photonic crystal hydrogel film and its preparation and application
  • A kind of photonic crystal hydrogel film and its preparation and application
  • A kind of photonic crystal hydrogel film and its preparation and application

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preparation example Construction

[0038] The photonic crystal hydrogel film provided by the invention, its preparation method, comprises the following steps:

[0039] (1) Preparation of photonic crystal hydrogel precursor solution: Fe 3 o 4 @C nanoparticles, acrylamide, methylenebisacrylamide and initiator are uniformly dispersed in an organic solvent to obtain a suspension of photonic crystal hydrogel precursor; each milliliter of photonic crystal hydrogel precursor contains Fe 3 o 4 @C nanoparticle 1~50mg, acrylamide 100~1000mg, methylenebisacrylamide 1~200mg and photoinitiator 1~20mg; The organic solvent is ethylene glycol, its function is to prevent Fe 3 o 4 @C Nanoparticles detach under magnetic field.

[0040] The Fe 3 o 4 @C nanoparticles are prepared as follows: dissolve ferrocene in acetone to obtain a solution with a concentration of 5-15 mg / mL; hydrogen peroxide can be added at room temperature to obtain a precursor solution, so that the concentration of hydrogen peroxide in the precursor solu...

Embodiment 1

[0054] The photonic crystal thin film in this embodiment is prepared according to the following method:

[0055] (1) The Fe 3 o 4 @C nanoparticles are prepared as follows: dissolve 0.45g ferrocene in 40mL acetone to obtain a uniformly dissolved solution, add hydrogen peroxide at room temperature, and the volume of hydrogen peroxide is 1.3mL (so that the concentration of hydrogen peroxide in the precursor solution is 1.15mol / L ), reacted at 180°C for 72h, after the reaction was complete, magnetically separated and washed the sample three times with acetone, and obtained the Fe after vacuum drying 3 o 4 @C Nanoparticles.

[0056] Preparation of Photonic Crystal Hydrogel Precursor Solution: Fe 3 o 4 @C Nanoparticles, acrylamide, methylene bisacrylamide and initiator are ultrasonically dispersed in ethylene glycol to obtain a suspension of photonic crystal hydrogel precursor; Fe is contained in each milliliter of ethylene glycol 3 o 4 @C nanoparticles 5mg, acrylamide 500mg,...

Embodiment 2

[0061] The photonic crystal thin film in this embodiment is prepared according to the following method:

[0062] (1) The Fe 3 o 4 @C nanoparticles are prepared as follows: Dissolve 0.6g ferrocene in 60mL acetone to obtain a uniformly dissolved solution, add hydrogen peroxide at room temperature, the volume of hydrogen peroxide is 4mL, react at 210°C for 72h, and magnetically separate The sample was washed three times with acetone and dried in vacuum to obtain the Fe 3 o 4 @C nanoparticles.

[0063] Preparation of Photonic Crystal Hydrogel Precursor Solution: Fe 3 o 4 @C Nanoparticles, acrylamide, methylene bisacrylamide and initiator are ultrasonically dispersed in ethylene glycol to obtain a suspension of photonic crystal hydrogel precursor; Fe is contained in each milliliter of ethylene glycol 3 o 4 @C nanoparticles 5mg, acrylamide 500mg, methylenebisacrylamide 30mg and photoinitiator 5mg.

[0064] (2) Preparation of cured photonic crystal film: spread the photonic c...

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Abstract

The invention discloses a photonic crystal hydrogel film and preparation and application thereof. The photonic crystal hydrogel film is prepared from polyacrylamide gel and Fe3O4@C nanoparticles distributed in the polyacrylamide gel, wherein the Fe3O4@C nanoparticles are nanoparticles prepared by coating the surface of Fe3O4 with a C material, the Fe3O4@C nanoparticles are arranged in a chain shape in certain direction in the polyacrylamide gel, and the concentration of the Fe3O4@C nanoparticles in the photonic crystal hydrogel film is 1 to 50mg / mL. According to the photonic crystal hydrogel film disclosed by the invention, categories, sizes and distribution modes of key doped particles in the photonic crystal hydrogel film and a corresponding preparation method are improved, so that compared with the prior art, the problems of formaldehyde detection is expensive and complex to operate are effectively solved, and a novel path is provided for detecting formaldehyde in solutions.

Description

technical field [0001] The invention belongs to the field of photonic crystal materials, and more specifically relates to a photonic crystal hydrogel film and its preparation and application. The photonic crystal hydrogel film is visible to the naked eye and has a specific formaldehyde response. Background technique [0002] Photonic crystals are microstructures in which media with different dielectric constants are periodically arranged. The main feature of photonic crystals is the photonic band gap, which can selectively allow light of a certain wavelength to pass through and prevent light of other wavelengths from passing through it; therefore, it has a specific reflection wavelength, and when the reflection wavelength is in the visible light band, it presents a structural color visible to the naked eye. . Due to the unique optical properties of photonic crystals, they have potential applications in the fields of display, coding, sensing, anti-counterfeiting, and optical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/02C08J5/18C08F220/56C08F222/38C08F2/48C08F2/44C08K9/02C08K3/22G01N21/41
CPCC08F2/44C08F2/48C08F220/56C08J5/18C08J7/02C08J2333/26C08K3/22C08K9/02C08K2003/2275C08K2201/011G01N21/41C08F222/385
Inventor 朱锦涛张甜贾晓潞王志宏张连斌
Owner HUAZHONG UNIV OF SCI & TECH
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