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Activation method of graphene oxide

An activation method and graphene technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of property destruction, large steric hindrance, and damage to the lamellar structure, so as to maintain properties and save energy. Effect

Active Publication Date: 2017-08-25
SHANDONG OBO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large steric hindrance of graphene oxide, the conditions for directly modifying the surface of graphene oxide are harsh and the reaction time is long. However, graphene oxide is prone to curling and agglomeration under harsh conditions, destroying its sheet structure. lead to the destruction of its original characteristics

Method used

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  • Activation method of graphene oxide
  • Activation method of graphene oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] 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;

[0108] 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;

[0109] ③Weigh 1.14g p-toluenesulfonyl chloride (the molar ratio of p-toluenesulfonyl chloride and graphene oxide is 3:1), add 10mL DMF to dissolve;

[0110] ④Under stirring condition, the solution obtained in step ③ is slowly added dropwise to the graphene oxide dispersion obtained in step ②;

[0111] 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;

[0112] ⑥Weigh 1.212g of triethylamine (the molar ratio of triethylamine to graphene oxide is 6:1), add 10mL of DMF to dissolve;

[0113] ⑦Under nitrogen con...

Embodiment 2

[0126] 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;

[0127] 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;

[0128] ③Weigh 1.128g of trifluoromethanesulfonic anhydride (the molar ratio of trifluoromethanesulfonic anhydride to graphene oxide is 2:1), add 10mL DMF to dissolve;

[0129]④Under stirring condition, the solution obtained in step ③ is slowly added dropwise to the graphene oxide dispersion obtained in step ②;

[0130] 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;

[0131] ⑥Weigh 0.808g triethylamine (the molar ratio of triethylamine to graphene oxide is 4:1), add 10mL DMF to dissolve;

[0132] ⑦Under ...

Embodiment 3

[0136] 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;

[0137] 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;

[0138] ③ Weigh 0.912g methanesulfonyl chloride (the molar ratio of methanesulfonyl chloride to graphene oxide is 4:1), add 10mL DMF to dissolve;

[0139] ④Under stirring condition, the solution obtained in step ③ is slowly added dropwise to the graphene oxide dispersion obtained in step ②;

[0140] 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;

[0141] ⑥ Weigh 1.616g of triethylamine (the molar ratio of triethylamine to graphene oxide is 8:1), add 10mL of DMF to dissolve;

[0142] ⑦Under nitrogen condi...

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Abstract

The invention provides an activation method of graphene oxide. The activation method comprises the following steps: firstly, dispersing graphene oxide in a polar solvent to obtain a graphene oxide solution; secondly, mixing the graphene oxide solution obtained in the previous step, an activating agent and an acid-binding agent to obtain a reaction system; lastly, under an anaerobic condition, heating the reaction system obtained in the previous step for reacting to obtain activated graphene oxide. By adopting the activation method, hydroxyl on the surface of the graphene oxide is activated under a mild condition, and an easy-leaving radical is formed by combining the activating agent and the hydroxyl on the surface of the graphene oxide, so that a carbon-oxygen bond on the surface of the graphene oxide is activated, and the difficulty in subsequently modifying a covalent bond on the surface of the graphene oxide is lowered; an intermediate with higher activity is provided for the surface functional modification of the graphene oxide, so that subsequent surface modification can be performed without extreme conditions, energy consumption is lowered, and the lamellar structure of graphene can be kept well, thereby keeping the characteristic of the graphene.

Description

technical field [0001] The invention belongs to the technical field of graphene materials, and relates to a method for activating graphene oxide, in particular to a method for activating hydroxyl groups on the surface of 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 layer of atomic thickness, it is the thinnest material and the strongest material currently in the application field, and its fracture strength is 200 times higher than that of steel, and it is also very good Excellent elasticity, the stretching range can reach 20% of its own size; at the same time, graphene has a huge theoretical specific surface area, stable physical and chemical p...

Claims

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Application Information

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IPC IPC(8): C01B32/198
Inventor 赵永彬张在忠蔡婷婷吴开付
Owner SHANDONG OBO NEW MATERIAL CO LTD
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