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Corrosion-resistant structural color hydrogel film and preparation method thereof

A hydrogel and structural color technology, which is applied in the field of corrosion-resistant structural color hydrogel film and its preparation, can solve the problems of disappearance and easy color change, and achieve the effect of good flexibility

Active Publication Date: 2019-07-23
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a corrosion-resistant structural color hydrogel film and its preparation method, the prepared structural color hydrogel film has good chemical stability, thereby solving the problem of the existing structural color hydrogel film The problem that the color is easy to change or disappear under the corrosion of acid, alkali, salt and organic solvents

Method used

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  • Corrosion-resistant structural color hydrogel film and preparation method thereof
  • Corrosion-resistant structural color hydrogel film and preparation method thereof
  • Corrosion-resistant structural color hydrogel film and preparation method thereof

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preparation example Construction

[0022] The invention provides a method for preparing a corrosion-resistant structural color hydrogel film. Using a colloidal photonic crystal as a template, first prepare a prepolymer mainly composed of a functional monomer with a chemically inert functional group, and then prepare a prepolymer on the photonic crystal template The particle gap penetrates and initiates polymerization. Finally, the template is removed by etching, and the hydrogel film with bright structural color can be obtained by washing in deionized water until neutral.

[0023] Specific steps are as follows:

[0024] Step 1: Prepare prepolymer, mix functional monomer and crosslinking agent in 1 mL of ethanol at a molar ratio of 10:0.1~20, then add 20 μL of thermal initiator or photoinitiator, sonicate for 0.5 h, set aside ;

[0025] Step 2: Infiltrate the prepolymer obtained in Step 1 into the colloidal photonic crystal template, and cover both sides of it with a plexiglass sheet of the same size as the col...

Embodiment 1

[0031] Using silica photonic crystal as template (with a bandgap wavelength of 440 nm), 2-chloroacrylonitrile as functional monomer, ethylene glycol dimethacrylate as crosslinking agent, ethanol as solvent, 2-hydroxy-2- Methylpropiophenone is used as an initiator, and it polymerizes under ultraviolet light.

[0032] Step 1: Prepare the prepolymer, mix 2-chloroacrylonitrile and ethylene glycol dimethacrylate at a molar ratio of 5:0.1 in 1 mL of ethanol, and then add 20 μL of 2-hydroxy-2-methanol propiophenone, ultrasonic 0.5 h, standby;

[0033] Step 2: Infiltrate the prepolymer obtained in Step 1 into the colloidal photonic crystal template, and cover the surface with a plexiglass sheet of the same size to form a "sandwich" structure of glass / template (photonic crystal) / glass. The main wavelength is 365nm) and polymerized for 4 h under irradiation;

[0034] Step 3: put the "sandwich" structure polymerized in step 2 into 3% hydrofluoric acid solution for etching for 6 h, then...

Embodiment 2

[0038] Using silica photonic crystal as a template (with a bandgap wavelength of 560 nm), 2-chloroacrylonitrile as a functional monomer, ethylene glycol dimethacrylate as a crosslinking agent, ethanol as a solvent, and 2-hydroxy-2- Methylpropiophenone is used as an initiator, and it polymerizes under ultraviolet light.

[0039] Step 1: Prepare the prepolymer, mix 2-chloroacrylonitrile and ethylene glycol dimethacrylate at a molar ratio of 5:0.1 in 1 mL of ethanol, and then add 20 μL of 2-hydroxy-2-methanol propiophenone, ultrasonic 0.5 h, standby;

[0040] Step 2: Infiltrate the prepolymer obtained in Step 1 into the colloidal photonic crystal template, and cover the surface with a plexiglass sheet of the same size to form a "sandwich" structure of glass / template (photonic crystal) / glass. The main wavelength is 365nm) and polymerized for 4 h under irradiation;

[0041] Step 3: put the "sandwich" structure polymerized in step 2 into 3% hydrofluoric acid solution for etching f...

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Abstract

The invention belongs to the technical field of nano functional materials, relates to a corrosion-resistant structural color hydrogel film and a preparation method thereof and aims at solving the problem that the color of an existing structural color hydrogel film is prone to change or disappear under corrosion of acid, alkali, salt, organic solvents and the like. The preparation method disclosedby the invention is characterized by comprising the following steps: firstly, preparing a prepolymer, wherein a functional monomer with a chemical inert functional group is utilized as a main materialof the prepolymer; then permeating the prepolymer into gaps among colloidal particles of a photonic crystal template and triggering polymerization; finally, etching to remove a template and washing to a neutral state in deionized water to obtain the hydrogel film with a bright structural color. The prepared structural color hydrogel film disclosed by the invention has good chemical stability, canstill keep the bright structural color under the corrosion of acid, alkali, salt and organic solvents and has no color change.

Description

technical field [0001] The invention belongs to the technical field of nanometer functional materials, and in particular relates to a corrosion-resistant structural color hydrogel film and a preparation method thereof. Background technique [0002] Different from dye colors, structural colors are derived from periodic microstructures (photonic crystals), which have the advantages of environmental protection, non-fading and iridescent effects, so they have a wide range of applications in the fields of sensors, optical displays, material decoration and anti-counterfeiting. Hydrogel is a kind of polymer that is hydrophilic but insoluble in water and has a three-dimensional network structure in space. Due to the unique advantages of water absorption, water retention, good flexibility and biocompatibility, hydrogels have attracted more and more attention from researchers. And by combining it with photonic crystal technology, the hydrogel can also show bright structural colors, m...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J3/075C08L33/20C08L33/12C08F220/44C08F220/14C08F222/14C08F2/48
CPCC08F2/48C08F220/14C08F220/44C08J3/075C08J5/18C08J2333/12C08J2333/20C08F222/102
Inventor 李露孟甜甜李奕铜
Owner SHAANXI UNIV OF SCI & TECH
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