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Method for preparing graphene/polyaniline laminated films on basis of layer-by-layer self-assembly technique

A layer-by-layer self-assembly and composite film technology, which is applied in the field of composite material preparation, can solve problems such as cumbersome methods, structure, and performance impact, and achieve the effects of low technical cost, mild conditions, and simple operation

Inactive Publication Date: 2012-11-21
JIANGNAN UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is cumbersome, and the reduction process of graphene will affect the structure and performance of the layer-by-layer self-assembled film.

Method used

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  • Method for preparing graphene/polyaniline laminated films on basis of layer-by-layer self-assembly technique

Examples

Experimental program
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Effect test

Embodiment 1

[0017] In the first step, 10 mg of graphene oxide was suspended and dispersed in 20 mL of ultrapure water. Ultrasonic dispersion was performed for 30 min (S45D, 500 W, 30% amplitude) to obtain a brown GO dispersion. The resulting dispersion was mixed with 20 ml of ultrapure water, 1 mL of hydrazine hydrate solution (85% mass fraction), and 70-145 μL ammonia water (30% mass fraction) in a 100 mL flask. After shaking vigorously or stirring for a few minutes, the container was placed in a water bath at 95°C for 60 min. The reaction solution was dialyzed in 0.5 wt% ammonia water to remove excess hydrazine in the remaining dispersion to obtain 0.25 mg / mL surface with Carboxylated graphene dispersion.

[0018] The second step, preparation of polyaniline aqueous solution Dissolve dark green aniline in DMAC (dimethylacetamide) to prepare a 120 mg / mL solution, stir for 48 h, and then sonicate for 8-10 h. The prepared solution was filtered through a 0.75 μm membrane filter to remove so...

Embodiment 2

[0023] The first step is to suspend and disperse 10mg graphene oxide in 20mL ultrapure water for 30min, and use 5wt% Na 2 CO 3 The solution adjusts the pH of the graphene oxide solution to 9-10, then adds sodium borohydride solution, and reacts at 80° C. for 1 h. Centrifugal washing several times, redispersed in water after ultrasonic oscillation to obtain pre-reduced graphene oxide. Under ice bath conditions (0-5°C), mix 460mg of p-aminobenzenesulfonic acid and 0.66g of 1M ice HCl solution, add an appropriate amount of ice water to dissolve it completely, and then slowly add 15% NaNO 2 solution. Add the prepared aryl diazonium salt dropwise to the pre-reduced graphene oxide solution prepared in the first step, and react in an ice bath for 2 h. Centrifuge and wash several times, and redisperse in water after ultrasonic oscillation. Then add hydrazine hydrate to it, and react at 100°C for 24h. After several times of centrifugal washing, disperse in water, and adjust the pH...

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Abstract

The invention relates to a method for preparing graphene / polyaniline laminated films on basis of a layer-by-layer self-assembly technique and belongs to the technical field of composite material preparation. The method includes steps of treating a substrate; soaking the treated substrate in a graphene dispersing agent for a period; taking the substrate out of the graphene dispersing agent and cleaning the substrate with deionized water; soaking the cleaned substrate into polyaniline solution for a period and then taking out the substrate and cleaning the same again; and repeating the steps above to obtain uniform graphene-polyaniline laminated films having regular layer structures. The conductive graphene / polyaniline laminated films prepared by the method are uniform, regular and ultrathin and have controllable structures and properties. The method can be carried out with low-cost and simple equipment under mild conditions, and can be used for the fields of sensors, supercapacitors and the like.

Description

technical field [0001] The invention belongs to the field of composite material preparation, in particular to a method for preparing a graphene / polyaniline composite film based on layer-by-layer self-assembly technology. Background technique [0002] In recent years, conductive thin films based on conductive polymers have attracted more and more attention due to their light weight, small size, and good electrical conductivity. [0003] Graphene has a unique structure and excellent electrical, thermal, and mechanical properties. Since it was successfully prepared in 2004, it has been a research hotspot all over the world. The combination of graphene and conductive polymers has received extensive attention. The long-range conjugated structure of polyaniline endows it with unique electrical and optical properties. The graphene-polyaniline composite material obtained by combining graphene and polyaniline can synthesize graphite. The respective performance characteristics and ad...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L79/02C08K9/00C08K3/04
Inventor 罗静马强陈宇泽朱正意
Owner JIANGNAN UNIV
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