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Metal organic skeleton/graphene oxide oil-water separation membrane and preparation method thereof

A metal-organic framework and oil-water separation membrane technology, applied in the field of water treatment, can solve the problems of secondary pollution of water bodies, difficult solid-liquid separation, etc., and achieve the effects of strong reusability, easy availability of raw materials, and improved oil-water separation effect.

Inactive Publication Date: 2018-06-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, traditional MOFs adsorption materials are generally powdery solids. As nanomaterials, it is difficult to achieve solid-liquid separation in the water treatment process, and it is easy to cause secondary pollution to the water body, thus limiting its application in the field of water treatment.

Method used

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  • Metal organic skeleton/graphene oxide oil-water separation membrane and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of a metal-organic framework / graphene oxide oil-water separation membrane, the steps are as follows:

[0034] (1) cutting a circular PVDF ultrafiltration membrane with a diameter of 50mm and soaking it in ethanol,

[0035] (2) Prepare 50 mL of dopamine hydrochloride Tris-HCl buffer solution with pH=8.5, dopamine hydrochloride concentration of 1 mg / mL, and Tris concentration of 10 mmol / L, take out the PVDF filter membrane soaked in ethanol, and rinse the surface with deionized water After adding ethanol, put it into the dopamine hydrochloride Tris-HCl solution, and soak it for 12 hours under the dark condition;

[0036] (3) The PVDF base film after soaking in step (2) is taken out, dried at 65° C., and then the base film is soaked in 0.15% trimesoyl chloride (TMC) solution for 15 min; after soaking, use isoparaffin Isopar G solvent washes excess TMC from the membrane surface.

[0037] (4) The base film soaked in step (3) was immersed in ZIF-8 / GO me...

Embodiment 2

[0040] A preparation method of a metal-organic framework / graphene oxide oil-water separation membrane, the steps are as follows:

[0041] (1) cutting a circular PVDF ultrafiltration membrane with a diameter of 50mm and soaking it in ethanol,

[0042] (2) Prepare 50 mL of dopamine hydrochloride Tris-HCl buffer solution with pH=8.5, dopamine hydrochloride concentration of 1.5 mg / mL, and Tris concentration of 10 mmol / L, take out the PVDF filter membrane soaked in ethanol, and rinse it with deionized water Put the ethanol on the surface into the dopamine hydrochloride Tris-HCl solution, and soak for 12 hours under the condition of avoiding light.

[0043] (3) The PVDF base film after soaking in step (2) is taken out, dried at 65° C., and then the base film is soaked in 0.1% trimesoyl chloride (TMC) solution for 18 min; after soaking, use isoparaffin Isopar G solvent washes excess TMC from the membrane surface.

[0044](4) The base film soaked in step (3) was immersed in ZIF-8 / GO...

Embodiment 3

[0047] A preparation method of a metal-organic framework / graphene oxide oil-water separation membrane, the steps are as follows:

[0048] (1) cutting a circular PVDF ultrafiltration membrane with a diameter of 50mm and soaking it in ethanol,

[0049] (2) Prepare 50 mL of dopamine hydrochloride Tris-HCl buffer solution with pH=8.5, dopamine hydrochloride concentration of 2 mg / mL, and Tris concentration of 10 mmol / L, take out the PVDF filter membrane soaked in ethanol, and rinse off the surface with deionized water The ethanol was put into the dopamine hydrochloride Tris-HCl solution, and soaked for 12 hours under the dark condition.

[0050] (3) The PVDF base film after soaking in step (2) is taken out, dried at 65° C., and then the base film is soaked in 0.3% trimesoyl chloride (TMC) solution for 15 min; after soaking, use isoparaffin Isopar G solvent washes excess TMC from the membrane surface.

[0051] (4) The base film soaked in step (3) was immersed in ZIF-8 / GO methanol ...

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Abstract

The invention relates to a metal organic skeleton / graphene oxide oil-water separation membrane and a preparation method thereof. The metal organic skeleton / graphene oxide oil-water separation membranecomprises a PVDF bottom membrane and a ZIF-8 / GO composite material, wherein the ZIF-8 / GO composite material is firmly loaded on the PVDF bottom membrane through the bonding between the ZIF-8 / GO composite material and trimesoyl chloride, the bonding between trimesoyl chloride and dopamine, and the combination between dopamine and the PVDF bottom membrane. According to the present invention, GO isintegrally compounded through the multi-level pore channels and the regular hexagonal window of ZIF-8, and the oil-water separation effect is substantially improved by matching the pores of ZIF-8 andthe channels in the GO lamella, wherein the oil-water separation efficiency is up to more than 99.5%; and the bonding between trimesoyl chloride and dopamine is firm and is not easily disconnected, and the reusability of the oil-water separation membrane is strong, wherein the oil-water separation efficiency is not basically changed after repeated use seven times, and is still above 96%.

Description

Technical field: [0001] The invention relates to a metal organic framework / graphene oxide oil-water separation membrane and a preparation method thereof, belonging to the technical field of water treatment. Background technique: [0002] Oil pollution of water bodies refers to the pollution of water bodies by oil mainly from oil tanker accidents, submarine oil extraction, oil tanker ballast water, and wastewater from oil refineries and petrochemical plants. It is the most common and serious pollution in water bodies. Oil is a very complex natural organic mixture, which has certain toxicity and brings great harm to the environment and ecological balance. It can also make fish meat smell of petroleum in very small concentrations. A large amount of oil substances form an oil film on the sea surface, which will affect the supplement of oxygen in the water and the photosynthesis of plants. Oil pollution will have a variety of complex effects on the natural environment, and oil i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D67/00B01D61/14B01D17/022
CPCB01D17/02B01D61/145B01D67/0002B01D71/34
Inventor 孙雪菲岳仍宇王曙光
Owner SHANDONG UNIV
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