Method for synchronously reducing and modifying graphene oxide

A graphene and solvent technology, applied in the field of simultaneous reduction and modification of graphene oxide, to achieve the effect of a simple reduction method

Inactive Publication Date: 2014-03-19
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, the application of urushiol and cardanol is limited to several industries such as coatings, so it is urgent to expand and develop the application of urushiol and cardanol in other fields

Method used

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  • Method for synchronously reducing and modifying graphene oxide
  • Method for synchronously reducing and modifying graphene oxide
  • Method for synchronously reducing and modifying graphene oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Graphene oxide was prepared by Hummers method. Graphene oxide was dispersed in DMF to prepare a 10 mg / mL dispersion. Urushiol was dissolved in DMF to make a 10 mg / mL solution. The two kinds of liquids prepared above were mixed uniformly in proportion (the consumption of urushiol was 100wt% of graphene oxide, that is, the mass ratio of urushiol and graphene oxide was 1:1), sonicated for 1h, introduced with nitrogen for 30min, and then heated to 100%. 110 degrees, constant temperature reaction at a stirring rate of 400 r / min for 6 h. The dispersion liquid is suction filtered, washed repeatedly, and then suction filtered to form a graphene membrane.

Embodiment 2

[0040] Graphene oxide was prepared by the modified Hummers method. Graphene oxide was dispersed in water to prepare a 0.05 mg / mL dispersion. The urushiol was dissolved in ethanol / water (the volume ratio of absolute ethanol and water was 90 / 10) to prepare a 10 mg / mL solution. The above two liquids were mixed uniformly in proportion (the amount of urushiol was 300wt% of graphene oxide, that is, the mass ratio of urushiol and graphene oxide was 3:1), sonicated for 1h, introduced with nitrogen for 30min, and then heated to 100 degrees. , and reacted at a constant temperature of 700 r / min for 8 h. The dispersion liquid is suction filtered, washed repeatedly, and then suction filtered to form a graphene membrane. The characterization results were similar to those of the synthesized product in Example 1.

Embodiment 3

[0042] Graphene oxide was prepared by Hummers method. Graphene oxide was dispersed in NMP to prepare a 10 mg / mL dispersion. Urushiol was dissolved in NMP to make a 10 mg / mL solution. The above two solutions were mixed uniformly in proportion (the amount of urushiol was 100wt% of graphene oxide, that is, the mass ratio of urushiol and graphene oxide was 1:1), sonicated for 1h, introduced with nitrogen for 30min, and then heated to 110 degrees. , and reacted at a constant temperature of 400 r / min for 6 h. The dispersion liquid is suction filtered, washed repeatedly, and then suction filtered to form a graphene membrane. The characterization results were similar to those of the synthesized product in Example 1.

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Abstract

The invention discloses a method for synchronously reducing and modifying graphene oxide, and particularly relates to a method for preparing graphene containing a large number of long carbon chains on the surface as well as polymerizable carbon-carbon double bonds and showing good dispersibility in an organic solvent through chemical reduction by taking the extraction liquid urushiol of the Chinese lacquer tree or the extraction liquid cardanol of cashew nut shell as a reducing agent and a modifying agent without adding any stabilizer or dispersant, which provides convenience to the follow-up preparation of a graphene-based polymer composite. The method disclosed by the invention is green and environment-friendly, simple in process, low in production cost and easy to popularize and use; the reaction process is easy to control; and particularly, the surface-modified unsaturated urushiol or cardanol with a long side carbon chain can be crosslinked or blended with most polymers, thereby being favorable for applying the modified graphene to the field of new materials such as high-molecular composites.

Description

technical field [0001] The invention relates to a method for simultaneously chemically reducing and modifying graphene oxide, in particular to a method for reducing and modifying graphene oxide by utilizing natural green compounds urushiol or cardanol to prepare a surface containing a large number of long carbon chains and the presence of polymerizable carbon The carbon double bond and the method for graphene with good dispersibility in an organic solvent provide convenience for the subsequent preparation of graphene-based polymer composite materials, and belong to the field of nanomaterials. Background technique [0002] When the two-dimensional crystal structure of graphene as carbon was reported by Andre Geim and Konstantin Novoselov in 2004, it immediately caused a sensation around the world. Composed of a dense layer of carbon atoms wrapped in a honeycomb crystal lattice, graphene is only 0.35 nm thick, making it the thinnest two-dimensional material in the world. This...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00C01B32/184C01B32/194
Inventor 郑雪琳翁家宝孟雪飞阮慧榕陈婷
Owner FUJIAN NORMAL UNIV
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