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Grapheme-organic material layered assembling film and preparation method thereof

A technology of organic material layer and layered assembly, which is applied in the direction of coating, layered products, epoxy resin coating, etc., can solve the problems that have not attracted enough attention of people, and achieve light weight, excellent thermal conductivity and low price Effect

Inactive Publication Date: 2009-07-08
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 1966, Iler et al. reported for the first time the thin film preparation technology based on the electrostatic interaction between oppositely charged substances as the driving force, but it did not attract enough attention at that time.

Method used

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  • Grapheme-organic material layered assembling film and preparation method thereof
  • Grapheme-organic material layered assembling film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: the preparation of graphene

[0025] 5 g of graphite and 3.75 g of sodium nitrate (analytical pure) were added to the flask, and then 375 mL of concentrated sulfuric acid (analytical pure) was added. Then, in an ice-water bath, slowly add 22.5 g of potassium permanganate while stirring, the addition time is controlled at 1 h, and then kept for 2 h to cool down to room temperature. Stir at room temperature for five days. During these five days, the reaction solution first turned green, then dark brown, and finally brick brown, and became viscous. The reaction solution was slowly added into 700mL of 5wt% dilute sulfuric acid, the addition time was controlled at 1h, the stirring was kept, and the temperature was controlled at 98°C. The reaction solution was stirred at this temperature for another 2 h, and then cooled to 60 °C. Add 15 mL of hydrogen peroxide (30% aqueous solution), keep at 60° C. for 2 h, then cool down to room temperature, and stir for ano...

Embodiment 2

[0027] Preparation of raw material solution: 50mg graphene (prepared by the method in Example 1, average diameter 1-2 μm, thickness is about 0.7-1.4nm) is added in 250ml water, through ultrasonic wave (500W) treatment 30 minutes, make it dissolve completely ; Take 2g of polyethyleneimine (PEI, average molecular weight 10000) and dissolve it in 200ml of deionized water, stir it well and let it stand for use.

[0028] The preparation of graphene / polyethyleneimine layered self-assembled film goes through the following steps:

[0029] 1. Apply a sacrificial layer of polycellulose acetate (1wt.%, acetone solution) on the polytetrafluoroethylene substrate by spin coating, and let it dry naturally;

[0030] 2. Add polyethyleneimine solution dropwise to the substrate rotating at 3000 rpm, spin coating for 15 seconds, wash with water, dry at 60-80°C;

[0031] 3. Add the prepared graphene solution dropwise onto the substrate rotating at 3000 rpm, spin coat for 15 seconds, wash with wat...

Embodiment 3

[0034] Preparation of raw material solution: 200mg graphene (prepared by the method in Example 1, average diameter 5-10 μm, thickness is about 1-2nm) is added in 200ml ethanol, through ultrasonic wave (500W) treatment 40 minutes, make it dissolve completely After standing still for use; Epoxy resin (bisphenol A type, 618), low molecular weight polyamide and ferrocene are dissolved in the acetone solution by mass ratio 55 / 30 / 1, fully stir, and obtaining concentration is 50% solution.

[0035] Preparation of graphene / epoxy resin-ferrocene multilayer film:

[0036] 1. Apply a sacrificial layer of cellulose polyacetate (1wt.%, acetone solution) on the polytetrafluoroethylene substrate by spin coating, and dry it in the air;

[0037] 2. Dip the above substrate into the epoxy resin-ferrocene solution, pull it out after 2 seconds, and dry it at room temperature;

[0038] 3. Add the prepared graphene solution dropwise onto the substrate rotating at 3000 rpm, spin coat for 30 seconds...

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Abstract

The invention relates to a graphene-organic material layered assembly film and a preparation method thereof. The preparation method comprises: using a graphene material and an organic material as raw materials, utilizing interaction of static electricity, hydrogen bonds, coordinate bonds or charge transfer and the like between the graphene and the organic material, and superposing films layer by layer through the film preparation methods such as spin coating, spraying, dipping, lifting and pulling and the like to prepare the film, wherein the thickness of each layer of the film can be controlled between 10 nanometers and 2 millimeters according to requirement. The layered assembly film and the preparation method have the characteristics that multilayer film materials with different functions are prepared by utilizing unique electric, magnetic, mechanical and chemical properties of the grapheme, and can be used as biomaterials, conductive materials, electromagnetic shielding and wave absorbing materials, photovoltaic materials, electrode materials, film filtering and separating materials, and the like to be applied to chemistry and chemical industry, biology and precision instruments, and manufacture of micro electrons, machinery and aviation and aerospace devices according to the selected different organic materials.

Description

technical field [0001] The invention relates to the preparation of film materials, in particular to a graphene-organic material layered assembly film and a preparation method thereof. Using the unique electrical, magnetic, mechanical and chemical properties of graphene, according to the selected organic materials, to prepare multi-layer thin film materials with different functions, which can be used as biological materials, conductive materials, electromagnetic shielding and absorbing materials, photovoltaic materials, etc. Materials, electrode materials, membrane filtration and separation materials are used in the manufacture of chemical, chemical, biological, precision instruments and microelectronics, machinery and aerospace devices. Background technique [0002] Layered assembled film is a multi-layer film material prepared by utilizing the interaction of electrostatic, hydrogen bond, coordination bond, molecular recognition, charge transfer and so on between different s...

Claims

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Application Information

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IPC IPC(8): B32B7/02B32B9/00C09D1/00C09D4/00C09D139/02C09D163/00C09D127/16B05D1/38B05D3/00C01B31/04
Inventor 陈永胜马延风梁嘉杰
Owner NANKAI UNIV
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