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Two-dimensional graphene imprinted composite material, preparation method and application thereof

A composite material, graphene technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as trace amounts of perfluorinated compounds that have not been seen, accurate detection, etc.

Active Publication Date: 2020-07-10
HUBEI INSPECTION & QUARANTINE TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are no reports on the market or in the existing literature that can detect perfluorinated compounds in a small amount and accurately

Method used

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  • Two-dimensional graphene imprinted composite material, preparation method and application thereof
  • Two-dimensional graphene imprinted composite material, preparation method and application thereof
  • Two-dimensional graphene imprinted composite material, preparation method and application thereof

Examples

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preparation example Construction

[0031] A kind of two-dimensional graphene imprinting composite material provided by the invention, its preparation method comprises the following steps:

[0032] Disperse the graphene material in 1-10mL of acetonitrile, add perfluorooctanesulfonic acid as a template, shake at room temperature for no less than 30 minutes, add different fluorine-substituted styrenes and 4-aminostyrenes as monomers, Ethylene glycol dimethacrylate is used as a cross-linking agent, and imprinted holes are prepared through the interaction of fluorine-fluorine and amino-sulfonic acid. Then add hydrogen peroxide and acetylacetone system to mediate the polymerization reaction initiated by free radicals, synthesize at 50-80 degrees for more than 10 hours, and obtain white polymer. After the template was washed away with an organic solvent, a two-dimensional graphene-imprinted composite material was obtained.

Embodiment 1

[0034] Disperse 2 mg of graphene material in 6 mL of acetonitrile, add 1 mmol perfluorooctanesulfonic acid as a template, shake at room temperature for 60 min, add 2 mmol 2,3,4,5,6-pentafluorostyrene and 2 mmol 4- Aminostyrene was used as a monomer, 20mmol ethylene glycol dimethacrylate was used as a crosslinking agent, and imprinted holes were prepared by the interaction of fluorine-fluorine and amino-sulfonic acid. Subsequently, 400 μL of hydrogen peroxide and 5 μL of acetylacetone were added to mediate the polymerization reaction initiated by free radicals, and the synthesis was carried out at 60°C for 16 hours to obtain a white polymer. After the template was washed away with an organic solvent, a two-dimensional graphene-imprinted composite material was obtained.

[0035] In the present invention, the performance test of the material prepared in Example 1 is carried out, and the accompanying drawings illustrate it in detail. figure 1 In the graphene, the thickness of sim...

Embodiment 2

[0039] Disperse 1 mg of graphene material in 1 mL of acetonitrile, add 1 mmol of perfluorooctanesulfonic acid as a template, shake at room temperature for 30 min, add 1 mmol of 4-aminostyrene as monomer, 5 mmol of ethylene glycol dimethacrylate As a cross-linking agent, imprinted holes are prepared by means of fluorine-fluorine and amino-sulfonic acid interactions. Subsequently, 100 μL of hydrogen peroxide and 0.5 μL of acetylacetone were added to mediate the polymerization reaction initiated by free radicals, and the synthesis was carried out at 50°C for 10 hours to obtain a white polymer. After the template is washed away with an organic solvent, a two-dimensional graphene imprinted composite material is obtained;

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Abstract

The invention discloses a two-dimensional graphene imprinted composite material, and a preparation method and an application thereof, and belongs to the field of new materials. The inventors of the invention find that a graphene-hydrogen peroxide-acetylacetone system has a free radical regeneration process in order to mediate a free radical-initiated organic polymerization reaction, a molecularlyimprinted film is directly synthesized on the surface of graphene with perfluorooctane sulfonic acid as a template by using the above characteristic, and the two-dimensional graphene imprinted composite material is prepared without secondary modification of the film, so the composite material can selectively identify target molecules, maintain the good catalytic performance of graphene and ensurethe application and promotion in multiple fields. In addition, the graphene has a great specific surface area, has a high adsorption capacity for perfluorinated compounds, significantly increases thenumber of imprinting sites per unit area, and enhances the selective identification ability of the imprinted composite material.

Description

technical field [0001] The invention belongs to the field of new materials, and more specifically relates to a method for preparing a two-dimensional graphene imprinted composite material. Background technique [0002] In recent years, perfluorinated compounds are a new type of organic pollutants, mainly including perfluorooctane carboxylic acid and perfluorooctane sulfonic acid. Since it was developed by 3M Company in the 1950s, it has been widely used due to its remarkable hydrophobicity, oleophobicity, good surface activity and stability, and poses a threat to the ecological environment and human health. Toxicological studies have confirmed that perfluorinated compounds have liver toxicity, cardiovascular toxicity, thyroid toxicity, nervous system toxicity, immune system toxicity and potential carcinogenicity. However, my country has been producing and using perfluorinated compounds in large quantities since 2003, and so far there are no relevant prohibitive rules and re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/14C08F222/14C08F2/44C08K3/04B01J20/26
CPCB01J20/26C08F2/44C08F212/14C08F222/14C08K3/04C08K3/042C08F222/102
Inventor 赵晓亚荆涛江游付晓芳叶诚王鹏
Owner HUBEI INSPECTION & QUARANTINE TECH CENT
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