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Batched preparation method of interlayer in-situ polymerization of graphene/polymer foams

An in-situ polymerization and graphene technology, applied in the field of polymer composite materials, can solve the problems of pollution, cumbersome steps, high energy consumption, etc., and achieve safe and controllable time-consuming and energy-consuming, uniform product structure, and simple process. Effect

Inactive Publication Date: 2019-06-28
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former not only involves an energy-intensive process with lower yields
For the latter, concentrated acids and strong oxidants are usually used in the preparation and assembly of graphene oxide, and there are polluting emissions
Therefore, the existing graphene / polymer foam preparation process is not only cumbersome, but also has problems such as high cost or polluting emissions, which limits the production and application of graphene / polymer foam

Method used

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  • Batched preparation method of interlayer in-situ polymerization of graphene/polymer foams
  • Batched preparation method of interlayer in-situ polymerization of graphene/polymer foams
  • Batched preparation method of interlayer in-situ polymerization of graphene/polymer foams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of graphite intercalation compound: Mix 2 g of ferric chloride with 100 mL of concentrated sulfuric acid and add 5 g of natural graphite flakes. After standing for 6 h, the solid part is separated by suction filtration and washed with 1 mol / L dilute sulfuric acid.

[0030] (2) Interlayer in-situ polymerization of monomers: add the graphite interlayer compound obtained in step (1) into a 0.1 mol / L pyrrole sulfuric acid solution (100 mL), and react at 0-5° C. for 24 h.

[0031] (3) Cleaning and drying of the product: the solid part was separated by suction filtration, and the product was washed alternately with water and alcohol for 5 times, and then dried in a blast oven at 60° C. to obtain a graphene / polypyrrole porous foam.

[0032] (4) The electrical conductivity of the obtained graphene / polypyrrole porous foam reaches 130 S / cm.

Embodiment 2

[0034] (1) Preparation of graphite intercalation compound: Mix 2 g of potassium persulfate with 100 mL of concentrated sulfuric acid and add a piece of flexible graphite paper with a mass of 3 g. After standing for 24 hours, take out the graphite paper and rinse it with 1 mol / L dilute sulfuric acid.

[0035] (2) Interlayer in-situ polymerization of monomers: the graphite paper obtained in step (1) was placed in 0.05 mol / L dopamine aqueous solution (100 mL), and reacted at room temperature for 4 h.

[0036] (3) Cleaning and drying of the product: the graphite paper is taken out from the reaction solution in step (2), washed alternately with water and alcohol, and then dried in a blast oven at 40°C to obtain a graphene / polydopamine foam.

[0037] (4) gained graphene / polydopamine foam is right to Pb 2+ 、Cd 2+ and Cu 2+ The adsorption values ​​of heavy metal ions are 163.0mg / g, 103.5mg / g and 89.6mg / g respectively

Embodiment 3

[0039] (1) Preparation of graphite interlayer compound: Slowly mix 15g of potassium ferrate with 100mL of concentrated sulfuric acid in an ice bath and add a piece of 2g of highly oriented pyrolytic graphite. dilute sulfuric acid rinse.

[0040] (2) Interlayer in-situ polymerization of monomers: the highly oriented pyrolytic graphite obtained in step (1) was placed in 0.1 mol / L polyaniline hydrochloric acid solution (100 mL), and reacted at room temperature for 24 h.

[0041] (3) Cleaning and drying of the product: take out the highly oriented pyrolytic graphite from the reaction solution in step (2), wash it alternately with water and alcohol, and dry it in a blast oven at 60°C to obtain a graphene / polyaniline foam .

[0042] (4) The electrical conductivity of the obtained graphene / polyaniline porous foam reaches 1120 S / cm.

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Abstract

The invention discloses a batched preparation method of interlayer in-situ polymerization of graphene / polymer foams. The method mainly comprises the following steps of 1, preparing a graphitic layer compound, wherein an oxidizing agent and concentrated sulfuric acid are mixed and added into graphite, after standing is performed, solid parts are separated out, and dilute sulfuric acid is used for washing repeatedly; 2, performing monomer interlayer in-situ polymerization, wherein the graphitic layer compound obtained in step 1 and monomers are mixed and react with each other under the proper temperature; 3, cleaning and drying the product, wherein the product obtained in step 2 is subjected to water and alcohol repeated washing and dried under the temperature of 30-200 DEG C, and graphene / polymer foams are obtained. The preparation process is simple, safe and controllable, graphene in the product is dispersed uniformly, and the method has the advantages that the preparation flow is short, little time and energy are consumed, control is easy, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to a method for rapidly preparing various graphene / polymer foams by initiating in-situ polymerization of monomers with graphite interlayer compounds. Background technique [0002] The unique two-dimensional structure of single atomic layer of graphene makes it have excellent electrical, optical, thermal, mechanical and other properties. The graphene porous foam assembled on the basis of graphene not only retains many performance advantages of graphene itself, but also has excellent performance in electrochemical energy storage, pollutant adsorption, gas sensing, electromagnetic wave absorption and other fields due to its porous structure. a broad application prospect. The introduction of polymers into graphene foams can not only regulate the pore structure of the foams, but also realize the functional modification of graphene foams. Therefore, graphene / polymer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L79/04C08L79/02C08L33/26C08K3/04
Inventor 周祚万郭一帆李金阳彭富喜孟凡彬韦炜李颖
Owner SOUTHWEST JIAOTONG UNIV
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