A photonic crystal hydrogel film with both pH value and ionic strength response, its preparation method and application

A technology of photonic crystals and ionic strength, which is applied to the oxides of ferrous iron, through the analysis of materials through chemical reactions, and through the observation of the influence of chemical indicators on material analysis, etc., can solve the problems that are difficult to prepare and the content of carboxyl groups is not enough. Precise control, long preparation period of photonic crystal hydrogel, etc., to achieve the effect of strong reproducibility, large-scale preparation and short preparation time

Active Publication Date: 2017-11-10
HUAZHONG UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a photonic crystal hydrogel film with both pH value and ionic strength response, its preparation method and application, the purpose of which is to use Fe 3 o 4 The formulation of nanoparticles and monomers forms an ordered structure in the photonic crystal film, thereby solving the problem of the long preparation period of the existing photonic crystal hydrogel, the inability to precisely control the carboxyl content, and the difficulty in preparing single-color, large-area, and high-quality hydrogels. Technical issues of photonic crystal hydrogel films with pH and ionic strength responses

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  • A photonic crystal hydrogel film with both pH value and ionic strength response, its preparation method and application
  • A photonic crystal hydrogel film with both pH value and ionic strength response, its preparation method and application

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preparation example Construction

[0033] The photonic crystal hydrogel film provided by the invention, its preparation method, comprises the following steps:

[0034] (1) Preparation of photonic crystal hydrogel precursor: Fe 3 o 4Nanoparticles, acrylamide, hydroxyethyl methacrylate, methylene bisacrylamide and photoinitiator are uniformly dispersed in the organic solution to obtain a suspension of photonic crystal hydrogel precursor, so that each milliliter of photonic crystal hydrogel precursor Fe in body 3 o 4 Nanoparticles 1mg-50mg, preferably 10mg-30mg, more preferably 10mg-20mg, acrylamide 100mg-600mg, preferably 200mg-400mg, hydroxyethyl methacrylate 10mg-500mg, preferably 20mg-40mg, more preferably 30mg-40mg, Forked bisacrylamide 1mg~20mg, and photoinitiator 0.1mg~1mg. The photoinitiator is a commonly used photoinitiator in the art, preferably 2,2-diethoxyacetophenone. Described organic solvent is preferably conventional dispersing solvents such as methanol, ethanol, ethylene glycol, polyethylene ...

Embodiment 1

[0046] A photonic crystal hydrogel film, prepared according to the following method:

[0047] (1) Preparation of photonic crystal hydrogel precursor: Fe 3 o 4 Nanoparticles, acrylamide, hydroxyethyl methacrylate, methylene bisacrylamide and photoinitiator are uniformly dispersed in ethylene glycol by ultrasonic dispersion method to obtain a suspension of photonic hydrogel crystal precursor, so that each Fe in ml photonic crystal hydrogel precursor 3 o 4 1 mg of nanoparticles, 100 mg of acrylamide, 10 mg of hydroxyethyl methacrylate, 1 mg of methylenebisacrylamide, and 0.1 mg of photoinitiator 2,2-diethoxyacetophenone.

[0048] The Fe 3 o 4 Nanoparticles are prepared as follows: dissolve ferrocene and hydrogen peroxide in 75ml of acetone, and add the solution to a 100mL stainless steel reaction kettle, so that the concentration of ferrocene in the solution is 0.001mg / ml, and the concentration of hydrogen peroxide is 0.01mg / ml; react at 100°C for 10 hours, after the react...

Embodiment 2

[0052] A photonic crystal hydrogel film, prepared according to the following method:

[0053] (1) Preparation of photonic crystal hydrogel precursor: Fe 3 o 4 Nanoparticles, acrylamide, hydroxyethyl methacrylate, methylene bisacrylamide and photoinitiator are uniformly dispersed in glycerin by ultrasonic dispersion method to obtain a suspension of photonic hydrogel crystal precursor, so that each milliliter of photon Fe in crystalline hydrogel precursors 3 o 4 1 mg of nanoparticles, 100 mg of acrylamide, 10 mg of hydroxyethyl methacrylate, 1 mg of methylenebisacrylamide, and 0.1 mg of photoinitiator 2,2-diethoxyacetophenone.

[0054] The Fe 3 o 4 Nanoparticles are prepared as follows: dissolve ferrocene and hydrogen peroxide in 75ml of acetone, and add the solution to a 100mL stainless steel reaction kettle, so that the concentration of ferrocene in the solution is 0.001mg / ml, and the concentration of hydrogen peroxide is 0.01mg / ml; react at 100°C for 10 hours, after th...

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Abstract

The invention discloses a photonic crystal hydrogel film with both pH value and ionic strength responses, a preparation method and application thereof. The photonic crystal hydrogel film includes Fe3O4 nanoparticles and polyacrylamide-methacrylic acid hydrogel; the Fe3O4 nanoparticles are uniformly dispersed in the hydrogel, arranged in a one-dimensional chain, and the nanoparticles in the film The concentration is 1-50 mg / mL. The preparation method of the photonic crystal hydrogel film includes uniformly mixing Fe3O4 nanoparticles and hydrogel monomers, causing a curing reaction by ultraviolet light, and finally immersing in a soluble carbonate aqueous solution to obtain the desired film. The preparation method of the invention is simple in operation, strong in repeatability, convenient for large-scale preparation, the amount of carboxyl groups in the obtained film is controllable, the film is monochromatic, and has obvious color changes under the stimulation of pH value or ionic strength, and is suitable for naked eye detection.

Description

technical field [0001] The invention belongs to the field of photonic crystal materials, and more specifically relates to a photonic crystal hydrogel film with both pH value and ionic strength response, its preparation method and application. Background technique [0002] Photonic crystals are a periodic structure composed of materials with different refractive indices alternately in space. The most fundamental feature of photonic crystals is that they have a photonic forbidden band, that is, light falling in the forbidden band is prohibited from propagating. Due to their unique optical properties, photonic crystals are widely used in the preparation of various optical devices (such as modulators, sensors, displays, etc.). [0003] Photonic crystals with pH and ionic strength responses are optical materials in which monodisperse nanoparticles are dispersed in pH-responsive polymers. Through the change of pH value and ionic strength of the solution, the volume of the respons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08J5/18C08J3/28C08L33/26C08F220/56C08F220/28C08F222/38C08F2/48C08F2/44C08K3/22C01G49/08G01N21/78
Inventor 朱锦涛贾晓潞沈雷
Owner HUAZHONG UNIV OF SCI & TECH
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