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Preparation method of nanoimprint anisotropic graphene film

A graphene film, anisotropic technology, applied in the field of preparation of anisotropic graphene film, can solve the problems of cumbersome calculation and mathematical calculation, complex operation steps, complex equipment, etc., and achieve complex preparation methods and good repeatability , Accurate and controllable structure

Pending Publication Date: 2021-12-21
WENZHOU INST UNIV OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Despite many advances, most of the existing mechanical measurement techniques require complex equipment, complex operation steps, cumbersome calculations and mathematical calculations, etc., which limit the application of these methods to a certain extent

Method used

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  • Preparation method of nanoimprint anisotropic graphene film
  • Preparation method of nanoimprint anisotropic graphene film
  • Preparation method of nanoimprint anisotropic graphene film

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preparation example Construction

[0029] The invention provides a kind of preparation method of the anisotropic graphene film of nanoimprinting, comprises the steps:

[0030] 1) Preparation of graphene-doped polymer films: select thermoplastic polymers to be configured into a pre-gel solution of a certain concentration, and prepare the pre-gel solution into a film with a uniform surface by using spin coating and solvent evaporation methods, and then the The surface of the film is modified with polydopamine, and graphene oxide is adhered, and finally the graphene oxide is reduced with hydroiodic acid to obtain a graphene-doped polymer film;

[0031] 2) Preparation of nanoimprinted anisotropic graphene film: use two PDMS positive templates with micron-scale grooves and nano-scale cylinders to sandwich the graphene-doped polymer film prepared in step 1) to form a " Sandwich" model, using a nanoimprinter to obtain a nanoimprinted anisotropic graphene film in one step.

[0032] Further, the thermoplastic polymer i...

Embodiment 1

[0043] A nanoimprinted anisotropic graphene film using nitrocellulose as a skeleton material, prepared according to the following method:

[0044] (1) Preparation of nitrocellulose pregel solution

[0045]The nitrocellulose powder was dissolved in a mixed solution of acetone and DMF (acetone:DMF=1:1, v / v), the final concentration was 7% (wt%), the mixed solution was placed on a magnetic stirrer, and mixed Stir until the nitrocellulose powder is completely dissolved, then, in order to increase the elasticity of the nitrocellulose film, add 2% Tween-20 to the mixed solution, and stir the solution evenly to obtain a nitrocellulose pregel solution.

[0046] (2) Preparation of nitrocellulose film grafted with graphene on the surface

[0047] The prepared nitrocellulose pregel solution was prepared into a thin film on the surface of a plasma-treated glass sheet by spin coating, and the film was heated on a hot stage at 65°C, and the film was cured by solvent volatilization, and the...

Embodiment 2

[0053] A nano-imprinted anisotropic graphene film using polyvinylidene fluoride as a framework material, prepared according to the following method:

[0054] (1) Preparation of polyvinylidene fluoride pregel solution

[0055] Dissolve polyvinylidene fluoride powder in DMF solution, final concentration is 7wt%, place this mixed solution on the magnetic stirrer, mix and stir until polyvinylidene fluoride powder dissolves completely, afterwards, in order to increase polyvinylidene fluoride film For elasticity, 2% Tween-20 is added to the mixed solution, and the solution is stirred evenly to obtain a polyvinylidene fluoride pregel solution.

[0056] (2) Preparation of polyvinylidene fluoride film grafted on the surface of graphene

[0057] The prepared polyvinylidene fluoride pregel solution is prepared into a thin film on the surface of a plasma-treated glass sheet by spin coating, and the film is heated on a hot stage at 65°C, and the film is cured by solvent volatilization. T...

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Abstract

The invention discloses a preparation method of a nanoimprint anisotropic graphene film. The preparation method comprises the following steps of: selecting a thermoplastic polymer to prepare a pre-gel solution, preparing a film with a uniform surface, modifying the surface of the film with polydopamine and adhering graphene oxide, and then reducing the graphene oxide with hydroiodic acid to obtain a graphene-doped polymer film; clamping the graphene-doped polymer film between two PDMS positive templates to form a sandwich model, and acquiring a nanoimprint anisotropic graphene film by adopting a nanoimprint lithography one-step method. The anisotropic graphene film prepared by the invention can be used for visual sensing of myocardial cells, and is beneficial to oriented growth of the myocardial cells. The preparation method is simple in preparation process, accurate and controllable in structure and good in repeatability, solves the problems that a traditional anisotropic structure film is complex in preparation method, has defects in structure and the like, and has great application value in the field of biomedicine.

Description

technical field [0001] The invention relates to the technical field of biomedical materials, in particular to a method for preparing a nanoimprinted anisotropic graphene film. Background technique [0002] Cell mechanics involves the regulation of basic biological functions of cells such as mechanical conduction, migration, cytokinesis and cellular immunity. Recent studies have shown that abnormal cellular mechanical state is closely related to the occurrence and development of diseases. Therefore, measurement of cellular mechanics is considered a useful method that can assess disease states and provide valuable therapeutic clues. To achieve quantitative determination of cell mechanics, many methods have been developed and applied, including atomic force microscopy, optical edge detection, flexible cantilevers, strain gauges, soft substrate material sensors, etc. Based on these methods, mechanomechanical detection of single cells or small cell populations has been achieved...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/00G01N21/17G01N33/48C12N5/077
CPCG03F7/0002G01N21/17G01N33/48C12N5/0657C12N2531/00
Inventor 赵远锦邵长敏池俊杰商珞然王月桐
Owner WENZHOU INST UNIV OF CHINESE ACAD OF SCI
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