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Graphene structural color film and preparation method and application thereof

A technology of structural color and graphene, applied in the field of preparation of graphene structural color thin film, to achieve excellent electrical conductivity, low cost, real-time feedback optical sensing and monitoring of electrical signals

Active Publication Date: 2021-03-12
NANJING DRUM TOWER HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the combination of structural chromatic materials and graphene hydrogel electronics is still facing serious challenges

Method used

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  • Graphene structural color film and preparation method and application thereof
  • Graphene structural color film and preparation method and application thereof
  • Graphene structural color film and preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0027] The invention provides a method for preparing a graphene structural color thin film, the preparation process is as follows figure 1 shown, including the following steps:

[0028] Step 1. Using the template sacrifice method, using colloidal particles and biocompatible prepolymers to prepare structural color inverse opal hydrogel films, the specific method is:

[0029] Preparation of photonic crystal positive structure templates by self-assembly of colloidal particles. The colloidal particles are selected from one of silicon dioxide, ferric oxide, titanium dioxide, polystyrene, polymethyl methacrylate, polyethyl acrylate or polyethylene.

[0030] Fill the biocompatible prepolymer into the photonic crystal positive structure template (the specific operation is: soak the photonic crystal positive structure template in the biocompatible prepolymer solution), and solidify to form photonic crystal-hydrogel hybridization body. The biocompatible prepolymer is selected from on...

Embodiment 1

[0035] The present embodiment provides a method for preparing a graphene structural color film based on polyethylene glycol diacrylate (PEGDA), comprising the following steps:

[0036] Step 1, preparation of PEGDA inverse opal structure hydrogel film:

[0037]1) The silica particles with a particle size of 250nm were centrifuged and washed several times, and then the obtained solid was dispersed in an ethanol solution, and a silica ethanol dispersion with a concentration of 20wt% was prepared; the silica ethanol dispersion was deposited on a glass sheet The positive structure template of silica photonic crystal is formed, and the electron microscope picture is as follows Figure 2a shown;

[0038] 2) Soak the photonic crystal positive structure template in the PEGDA hydrogel prepolymer solution (0.20g / mL) for 2h, and obtain the photonic crystal-hydrogel hybrid through UV curing;

[0039] 3) Finally, use HF (4wt%) to corrode the silica colloid particles in the photonic crysta...

Embodiment 2

[0046] The present embodiment provides a method for preparing a graphene structural color film based on methyl methacrylate modified gelatin (GelMa), comprising the following steps:

[0047] Step 1, preparation of GelMa inverse opal hydrogel film:

[0048] 1) Polystyrene particles with a particle size of 240nm were centrifuged and washed several times, and then the resulting solid was dispersed in an ethanol solution, and a polystyrene ethanol dispersion with a concentration of 20wt% was prepared, and the polystyrene ethanol dispersion was deposited on a glass sheet Form a polystyrene photonic crystal positive structure template;

[0049] 2) Soak the polystyrene photonic crystal positive structure template in GelMa hydrogel pre-poly solution (0.20g / mL) for 2h, and obtain the photonic crystal-hydrogel hybrid through UV curing;

[0050] 3) Finally, the polystyrene colloid particles in the photonic crystal-hydrogel hybrid were removed by immersion in tetrahydrofuran to obtain a ...

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Abstract

The invention discloses a graphene structural color film and a preparation method and application thereof. The preparation method comprises the following steps that 1, a template sacrifice method is adopted, colloid particles and biocompatible prepolymers are utilized, and a structural color inverse opal hydrogel film is prepared; 2, a graphene hydrogel precursor is poured into the structural color inverse opal hydrogel film obtained in the step 1, and curing is performed to obtain a graphene structural color film, wherein the graphene hydrogel precursor is prepared by dispersing a reduced graphene oxide solution into a hydrogel precursor solution. The method is easy to operate and low in cost, a large monitoring instrument is not needed, and the prepared graphene structure color film canfeed back electric signals and show color changes.

Description

technical field [0001] The invention belongs to the technical field of hydrogel films, in particular to a preparation method and application of a graphene structural color film. Background technique [0002] Stimuli-responsive, water-retaining, and biocompatible hydrogels have attracted extensive attention. Among them, due to their excellent electrical properties, adjustable conductive sensing channels, and structures similar to some natural tissues, conductive hydrogels have become a promising candidate for electrochemical sensors, neural electrodes, artificial muscles, electronics, etc. Promising material candidates in areas such as skin. Conductive hydrogels are usually prepared by introducing electrical particles such as carbon nanotubes, metal particles or graphitic materials directly into polymeric substrates. Among them, graphene materials have attracted a lot of attention due to their excellent properties such as biocompatibility, large surface area, high thermal c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L71/02C08L33/26C08K3/04C08L89/00C08L33/24C08J3/075G01J1/42G01J1/00G01J5/20G01J5/00
CPCC08J5/18C08J3/075G01J1/42G01J1/00G01J5/20G01J5/00C08J2371/02C08J2389/00C08J2433/26C08J2433/24C08K3/042C08J2471/02C08J2489/00C08J2333/26C08J2333/24
Inventor 赵远锦汪雨张大淦王月桐池俊杰
Owner NANJING DRUM TOWER HOSPITAL
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