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Aminated graphene oxide

A graphene and amination technology, applied in inorganic chemistry, carbon compounds, chemical instruments and methods, etc., can solve problems affecting graphene performance, graphene curling and agglomeration, long reaction time, etc., to maintain the original characteristics, The effect of maintaining the lamellar structure

Inactive Publication Date: 2019-01-22
SHANDONG OBO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, higher temperatures and longer reaction times are usually required, which will inevitably cause graphene to curl and agglomerate, affecting the properties of graphene itself.

Method used

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Examples

Experimental program
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preparation example Construction

[0071] The present invention has no special limitation on the source of the graphene oxide after surface hydroxyl activation. It can be prepared from conventional sources known to those skilled in the art, and can be prepared according to conventional methods or purchased commercially. Those skilled in the art can according to actual production conditions, Modification requirements and quality control are selected and adjusted. The present invention is to further improve the properties of the product, ensure the integrity of the graphene structure, optimize and complete the reaction route, and the graphene oxide after the surface hydroxyl activation is preferably prepared by the following steps :

[0072] 1) After graphene oxide is dispersed in a polar solvent, a graphene oxide solution is obtained;

[0073] 2) After mixing the graphene oxide solution, activator and acid-binding agent obtained in the above steps, a reaction system is obtained;

[0074] 3) Under an oxygen-free...

Embodiment 1

[0160] Graphene oxide after surface hydroxyl activation

[0161] ①Add 0.75g graphene oxide slurry (mass fraction 28%) in a single-necked flask, add 100mL DMF, and ultrasonically stir for 30min to obtain a graphene oxide dispersion;

[0162] ②Add 9g of activated 5A molecular sieve to the graphene oxide dispersion in step ①, soak the dispersion for 24 hours and filter the dispersion into a three-necked flask;

[0163] ③Weigh 1.14g p-toluenesulfonyl chloride (the molar ratio of p-toluenesulfonyl chloride and graphene oxide is 3:1), add 10mL DMF to dissolve;

[0164] ④Under stirring condition, the solution obtained in step ③ is slowly added dropwise to the graphene oxide dispersion obtained in step ②;

[0165] ⑤Transfer the three-neck flask containing the dispersion liquid in step ④ to the oil bath, connect the condenser pipe and double-row pipe, and pass nitrogen for 20 minutes;

[0166]⑥Weigh 1.212g of triethylamine (the molar ratio of triethylamine to graphene oxide is 6:1), ...

Embodiment 2

[0180] Aminated graphene oxide

[0181] ①Add 0.212g of GOTs prepared in Example 1 into a single-necked flask, add 100mL of DMF, and stir ultrasonically for 30min to obtain a GOTs / DMF dispersion;

[0182] ② Weigh 1.3g of triethylenetetramine (the mass fraction of triethylenetetramine is 68%, and the molar ratio of triethylenetetramine to GOTs is 3:1) into a three-necked flask, and add 50mL of DMF to dissolve;

[0183] ③ Slowly add the GOTs / DMF dispersion obtained in step ① to the solution obtained in step ② under the condition of stirring in an ice bath (0°C);

[0184] ④ Add the reaction solution obtained in step ③ into a microwave reactor, and react for 10 minutes at a power of 800W;

[0185] ⑤ After the reaction is completed, the product is suction-filtered, washed with absolute ethanol, and vacuum-dried at 60° C. for 12 hours to obtain aminated graphene oxide.

[0186] see image 3 , image 3 It is a schematic diagram of the process flow for preparing aminated graphene o...

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Abstract

The invention provides aminated graphene oxide preparing from graphene oxide having undergone surface hydroxyl activation and an ammonia source. According to the invention, the graphene oxide having undergone surface hydroxyl activation is used as a raw material, and the ammonia source is directly added for amination modification; and after a hydroxyl group on the surface of the graphene oxide isactivated, a carbon-oxygen bond becomes easy to break, so the lamellar structure of the graphite oxide can be well maintained and original characteristics can be reserved.

Description

technical field [0001] The invention belongs to the technical field of modified graphene, relates to an aminated graphene oxide, in particular to a surface aminated graphene oxide. Background technique [0002] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. It is a planar film composed of carbon atoms with sp2 hybrid orbitals forming a hexagonal honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. As a two-dimensional crystal composed of carbon atoms with only one atomic thickness, it is the thinnest material and the strongest material in the application field; at the same time, graphene has a huge theoretical specific surface area and stable physical and chemical properties , can maintain good structural stability under high working voltage and high current rapid charge and discharge; graphene also has excellent conductivity, which can reduce internal resistance and improve the cycle stability of ...

Claims

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Application Information

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IPC IPC(8): C01B32/198
CPCC01P2002/82C01P2004/03
Inventor 吴开付张在忠赵永彬蔡婷婷刘海波
Owner SHANDONG OBO NEW MATERIAL CO LTD
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