Stretchable adhesive conductive structure color hydrogel film and preparation method thereof

A conductive hydrogel and conductive structure technology, applied in the directions of sensors, diagnosis, applications, etc., can solve the problems of single detection signal and poor adhesion of conductive hydrogel film, and achieve low cost, firm adhesion and affinity, The effect of good conductivity

Active Publication Date: 2020-07-10
NANJING DRUM TOWER HOSPITAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, based on the above considerations, we designed a stretchable adhesive conductive structural color hydrogel film based on the photonic crystal positive structure template, which can solve the problem of poor adhesion and single detection signal of the existing conductive hydrogel film. problem, which can be used in flexible electronics

Method used

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  • Stretchable adhesive conductive structure color hydrogel film and preparation method thereof
  • Stretchable adhesive conductive structure color hydrogel film and preparation method thereof
  • Stretchable adhesive conductive structure color hydrogel film and preparation method thereof

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preparation example Construction

[0031] The preparation method of the stretchable adhesive conductive structural color hydrogel film of the present invention, the preparation process is as follows figure 1 shown, including the following steps:

[0032] 1) Preparation of stretchable inverse opal hydrogel films: using stretchable hydrogel prepolymers to replicate and etch photonic crystal positive structure templates by template sacrificial method, including:

[0033] 1.1) Self-assembled colloidal particles to obtain photonic crystal positive structure templates, the colloidal particles are selected from silicon dioxide, polystyrene, ferric oxide, titanium dioxide, polyethylene, polyethyl acrylate, polymethyl methacrylate A sort of;

[0034] 1.2) Stretchable hydrogel prepolymers are filled with photonic crystal positive structure templates, and colloidal particles-hydrogel filling colloids are obtained through ultraviolet irradiation, solvent volatilization or oven heating. The stretchable hydrogel The prepol...

Embodiment 1

[0040] A stretchable adhesive conductive structural color hydrogel film based on polyurethane (PU), prepared according to the following method:

[0041] (1) Preparation of PU inverse opal structure hydrogel film, specifically:

[0042] (1.1) Dissolve silica colloidal particles in ethanol solution (99%) to prepare 20wt% silica ethanol dispersion;

[0043] (1.2) Deposit the silica ethanol dispersion on a glass slide, and self-assemble to form a silica photonic crystal positive structure template;

[0044] (1.3) Calcining the silica photonic crystal template at 600°C for 5 hours to improve the mechanical strength of the template;

[0045] (1.4) Dissolve solid PU in dimethylformamide solvent at 60°C, and stir overnight to prepare 20wt% PU pregel solution;

[0046] (1.5) Inject the PU pregel solution into the silica photonic crystal template at 80°C, and gradually solidify through solvent evaporation until the solvent is completely evaporated to obtain silica colloid particles-PU...

Embodiment 2

[0053] A stretchable adhesive conductive structured color hydrogel film based on polyethylene glycol diacrylate (PEGDA), prepared as follows:

[0054] (1) Preparation of PEGDA inverse opal structured hydrogel film

[0055] Silica colloidal particles are dissolved in an ethanol solution to prepare a 20wt% silica ethanol dispersion; the silica ethanol dispersion is deposited on a glass slide, and self-assembled to form a silica photonic crystal positive structure template; The silica photonic crystal positive structure template was calcined at 600°C for 5 hours to increase the mechanical strength of the template; after that, 20wt% PEGDA pregel solution was prepared, and 1% (v / v) photoinitiator (2-hydroxy-2- Methylpropiophenone) was added to the PEGDA pregel solution, and it was injected into the silica colloidal crystal template, and cured by ultraviolet radiation to obtain silica colloid particles-PEGDA hydrogel filling colloid; the silica colloid The particle-PEGDA hydrogel f...

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Abstract

The invention discloses a stretchable adhesive conductive structure color hydrogel film and a preparation method thereof. The method is based on a photonic crystal positive structure template, an inverse opal structure hydrogel film is prepared through a template sacrifice method, gaps of the inverse opal structure hydrogel film are filled with an adhesive conductive hydrogel precursor solution, the adhesive conductive structure color hydrogel film is obtained after curing, and the method is easy to operate, low in cost, capable of being repeatedly used, convenient to use and reliable. The conductive structure color hydrogel film prepared by the method has good conductivity, has firm adhesion and affinity to skin and has the characteristic of dual-signal response to mechanical movement andcan be used as a dual-signal sensor for human body activities and feeds back structural color sensing and electric signal sensing in real time according to the change of the human body activities.

Description

technical field [0001] The invention relates to the technical field of biomaterials, in particular to a stretchable adhesive conductive structural color hydrogel film and a preparation method thereof. Background technique [0002] Conductive hydrogel films are a class of commonly used flexible electronic devices, which have the advantages of good electrical conductivity, tunable mechanical flexibility, and easy processing. Conductive hydrogel film is composed of conductive material cross-linked hydrogel material, among them, hydrogel material is a kind of material composed of three-dimensional network polymer and liquid, and its unique structure makes it have good biocompatibility , flexibility, and mechanical properties similar to human tissue. Conductive hydrogel films prepared by combining hydrogel materials with a series of conductive fillers (carbon nanotubes, graphene, metal nanowires, conductive polymers, etc.) are widely used in flexible electrodes. , flexible mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/36C08J9/26C08J5/18C08J3/075A61B5/053C08L75/04C08L71/02C08L89/00
CPCA61B5/053C08J3/075C08J5/18C08J9/26C08J9/36C08J2201/044C08J2201/0442C08J2201/046C08J2371/02C08J2375/04C08J2389/00C08J2433/26C08J2479/04C08K3/041C08K3/042C08K2201/011
Inventor 赵远锦汪雨王月桐
Owner NANJING DRUM TOWER HOSPITAL
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