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Graphene oxide/isostearic acid composite separation membrane and its preparation method and application

A technology of isostearic acid and graphene, which is applied in the field of graphene oxide/isostearic acid composite separation membrane and its preparation, can solve the problem of many factors affecting the separation of oil-water emulsion by graphene oxide composite membrane, graphene oxide film mechanical Unstable performance, composite membrane rejection rate, low water flux and other problems, to achieve the effect of excellent separation stability and excellent thermal stability

Active Publication Date: 2020-09-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the graphene oxide film has good mechanical properties and stability under dry conditions, the mechanical properties of the graphene oxide film will become unstable when it is in a humid or water environment, and the graphene oxide particles are easy to decompose from the film. fall off, resulting in rupture of the film
In addition, the rejection rate and water flux of the existing composite membranes are generally low, and there are many factors affecting the separation of oil-water emulsions by graphene oxide composite membranes. There is no scientific method for the separation of oil-water emulsions by graphene oxide composite membranes. Therefore, it is impossible to obtain an optimal separation condition for oil-water emulsion, which greatly affects the application of graphene oxide composite membrane in the actual process.

Method used

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  • Graphene oxide/isostearic acid composite separation membrane and its preparation method and application
  • Graphene oxide/isostearic acid composite separation membrane and its preparation method and application
  • Graphene oxide/isostearic acid composite separation membrane and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of graphene oxide / isostearic acid composite:

[0025] Take 100mg of graphene oxide and dissolve in 50mg of absolute ethanol to obtain mixed solution 1; then take 100mg of isostearic acid and dissolve in 50mg of absolute ethanol to obtain mixed solution 2; combine mixed solution 1 and mixed solution 2 The mixture was mixed uniformly by ultrasonic to obtain the mixture 3 and sealed with plastic wrap; the mixture 3 was placed at 70°C and continuously stirred in a water bath to heat and react for 10 hours, and then the obtained reaction solution was vacuum dried at 80°C for 12 hours to evaporate the ethanol. The graphene oxide / isostearic acid composite is obtained.

[0026] (2) Preparation of graphene oxide / isostearic acid composite separation membrane:

[0027] In a 50mL beaker, take 5mg of graphene oxide / isostearic acid complex (GO-ISA nanocomposite) and dissolve it in 30mL of deionized water, magnetically stir for 20min, and ultrasonic for 20min to obtain 30mL ...

Embodiment 2

[0029] (1) Preparation of graphene oxide / isostearic acid composite:

[0030] Take 50mg of graphene oxide and dissolve in 50mg of absolute ethanol to obtain mixed solution 1; then take 100mg of isostearic acid and dissolve in 50mg of absolute ethanol to obtain mixed solution 2; combine mixed solution 1 and mixed solution 2 The mixture was mixed uniformly by ultrasonic to obtain the mixture 3 and sealed with plastic wrap; the mixture 3 was placed in a water bath with continuous stirring at 70°C for 10 hours, and then the resulting reaction solution was vacuum dried at 80°C for 12 hours to evaporate the ethanol. The graphene oxide / isostearic acid composite is obtained.

[0031] (2) Preparation of graphene oxide / isostearic acid composite separation membrane:

[0032] In a 50mL beaker, take 10mg of graphene oxide / isostearic acid complex (GO-ISA nanocomposite) and dissolve it in 20mL of deionized water, magnetically stir for 30min, and ultrasonic for 30min to obtain 20mL of mixed solution...

Embodiment 3

[0037] (1) Preparation of graphene oxide / isostearic acid composite:

[0038] Take 50mg of graphene oxide and dissolve in 50mg of absolute ethanol solution to obtain mixture 1; then respectively take 150mg of isostearic acid and dissolve in 50mg of absolute ethanol to obtain mixture 2; combine mixture 1 and mixture 2 The mixture was mixed uniformly by ultrasonic to obtain the mixture 3 and sealed with plastic wrap; the mixture 3 was placed in a water bath with continuous stirring at 70°C for 10 hours, and then the resulting reaction solution was vacuum dried at 80°C for 12 hours to evaporate the ethanol. The graphene oxide / isostearic acid composite is obtained.

[0039] (2) Preparation of graphene oxide / isostearic acid composite separation membrane:

[0040] In a 50mL beaker, take 15mg of graphene oxide / isostearic acid complex (GO-ISA nanocomposite) and dissolve it in 10mL of deionized water, magnetically stir for 40min, and ultrasonic for 40min to obtain 10mL of mixed solution 4 (GO...

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Abstract

The invention belongs to the technical field of environmental functional material preparation, and particularly relates to a graphene oxide / isostearic acid composite separation membrane, a preparationmethod and application thereof. The preparation method of the graphene oxide / isostearic acid composite separation membrane provided by the invention specifically comprises the following steps: dissolving graphene oxide in an anhydrous ethanol solution; dissolving isostearic acid in anhydrous ethanol; uniformly mixing the above two solutions, heating and reacting in a water bath, and drying in a vacuum; dissolving the obtained graphene oxide / isostearic acid compound in deionized water and magnetically stirring; taking a commercial mixed cellulose film as a base membrane, filtering in a vacuum,and drying in a vacuum to obtain the graphene oxide / isostearic acid composite separation membrane. The preparation method is simple and easy to operate, and the prepared composite separation membranehas excellent thermal stability, and good separation stability, the rejection rate is up to 93.7%, the composite separation membrane can effectively remove an oil-water emulsion in the aqueous solution, and is expected to be applied to industrial production.

Description

Technical field [0001] The invention belongs to the technical field of environmental functional material preparation, and specifically relates to a graphene oxide / isostearic acid composite separation membrane and a preparation method and application thereof. Background technique [0002] With the development of science and technology and the continuous improvement of people's material living standards, a large amount of industrial oily wastewater is continuously discharged into the environment. Coupled with frequent marine oil spill accidents, these untreated oily wastewater has caused huge damage to the living environment of human beings. At the same time, the oily wastewater is difficult to recycle, causing a huge waste of resources. Therefore, how to separate oil and water is a common problem facing the world. Membrane separation method has become a research hotspot of many scientific researchers due to its many advantages, such as good treatment effect, low energy consumptio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/06B01D17/02B01D17/04B01D67/00B01D69/12B01D71/02
CPCB01D17/04B01D17/085B01D67/0079B01D69/125B01D71/021B01D71/06
Inventor 刘燕吴维富李宇龙胡肖
Owner JIANGSU UNIV
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