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Preparation method of super-hydrophobic oleophilic graphene aerogel

A graphene airgel and superhydrophobic technology, applied in the field of nanomaterials, can solve the problems of insufficient stability and recycling rate of new polyurethane sponges, and restrict large-scale applications, so as to facilitate recycling and reuse, and good adsorption Effects of Reactivity, Hydrophobicity and Lipophilicity Enhancement

Active Publication Date: 2017-03-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The prepared new polyurethane sponge has superhydrophobicity and achieved a good oil-water separation effect. However, through the cycle experiment, it was found that the new polyurethane sponge has insufficient stability and recycling rate, which seriously restricts its large-scale application in the field of oil-water separation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Mix 100mg of graphene oxide and 100mL of absolute ethanol in a three-necked flask, and ultrasonically disperse it evenly for 1 hour;

[0023] (2) Two kinds of ammoniated silica sols (20nm / 50nm) with different average particle sizes prepared by the Stober method, for later use;

[0024] (3) Mix the ammoniated silica sol with different particle sizes prepared in step (2) with the graphene oxide solution, transfer the mixed solution into an oil bath at 75°C, and react with magnetic stirring for 8 hours, and wait for the dispersion to cool After reaching room temperature, rinse with absolute ethanol and deionized water, and finally obtain a silica / graphene oxide composite, which is set aside;

[0025] (4) Dissolve the silica / graphene composite obtained in step (3) in water at a concentration of 2 mg / mL, add ammonia water after ultrasonication for 5 minutes, adjust the pH of the solution to 11, transfer it into a hydrothermal reaction kettle, and set the temperature at 1...

Embodiment 2

[0030] (1) Mix 100mg of graphene oxide and 100mL of absolute ethanol in a three-necked flask, and ultrasonically disperse it evenly for 1 hour;

[0031] (2) Two kinds of ammoniated silica sols (20nm / 50nm) with different average particle sizes prepared by the Stober method, for later use;

[0032] (3) Mix the ammoniated silica sol with different particle sizes prepared in step (2) with the graphene oxide solution, transfer the mixed solution into an oil bath at 75°C, and react with magnetic stirring for 8 hours, and wait for the dispersion to cool After reaching room temperature, rinse with absolute ethanol and deionized water, and finally obtain a silica / graphene oxide composite, which is set aside;

[0033] (4) Dissolve the silica / graphene composite obtained in step (3) in water at a concentration of 2 mg / mL, add ammonia water after ultrasonication for 5 minutes, adjust the pH of the solution to 11, transfer it into a hydrothermal reaction kettle, and set the temperature at 1...

Embodiment 3

[0037] (1) Mix 100mg of graphene oxide and 100mL of absolute ethanol in a three-necked flask, and ultrasonically disperse it evenly for 1 hour;

[0038] (2) Two kinds of ammoniated silica sols (20nm / 50nm) with different average particle sizes prepared by the Stober method, for later use;

[0039] (3) Mix the ammoniated silica sol with different particle sizes prepared in step (2) with the graphene oxide solution, transfer the mixed solution into an oil bath at 75°C, and react with magnetic stirring for 8 hours, and wait for the dispersion to cool After reaching room temperature, rinse with absolute ethanol and deionized water, and finally obtain a silica / graphene oxide composite, which is set aside;

[0040] (4) Dissolve the silica / graphene composite obtained in step (3) in water at a concentration of 2 mg / mL, add ammonia water after ultrasonication for 5 minutes, adjust the pH of the solution to 11, transfer it into a hydrothermal reaction kettle, and set the temperature at 1...

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Abstract

The invention discloses a preparation method of super-hydrophobic oleophilic graphene aerogel. The method comprises the following steps of combining graphene oxide with ammoniated silicon dioxide particles at a particle size of 20 nm / 50 nm and performing magnetic-stirred reaction in an oil bath pan at 75 DEG C to produce a silicon dioxide / silicon dioxide compound; dissolving the obtained compound in water, adjusting the PH value to 11 through ammonia, then subjecting the compound to reaction in a 180 DEG C hydrothermal reactor for 24 hours; performing cooling and drying to obtain the super-hydrophobic oleophilic graphene aerogel. The obtained super-hydrophobic oleophilic graphene aerogel has the advantages of being large in absorbing capacity, rapid in oil absorption, beneficial to recovery of leaked oil, reusable and the like and accordingly has a good application prospect in the aspect of oil-water separation.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a preparation method for modifying graphene oxide with nanometer silicon dioxide to generate superhydrophobic and lipophilic graphene airgel. Background technique [0002] Nano-silica with different particle sizes forms a micro-nano structure on the graphene airgel, thereby achieving the effect of superhydrophobicity. The lipophilicity of the graphene airgel itself makes this composite material superhydrophobic, The dual characteristics of lipophilicity have great application prospects in the field of oil-water separation. [0003] In 2013, Hu Ruanbing of Zhejiang Sci-Tech University proposed a method for preparing a new type of polyurethane sponge in his master's thesis "Preparation and Properties of Superhydrophobic and Lipophilic Composite Materials". First, the polyurethane sponge was immersed in water and absolute ethanol respectively. Ultrasonic cleaning 3 times, and then plac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198B82Y40/00B01J20/20B01J20/30C02F1/28C02F1/40
CPCB01J20/103B01J20/20C01P2002/82C01P2004/03C01P2004/04C01P2004/64C01P2006/19C02F1/283C02F1/40
Inventor 张一梅陈庄张丹丹
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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