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Seawater desalination composite membrane based on graphene oxide and preparation method thereof

A graphene oxide and composite membrane technology, applied in the field of membrane separation, to achieve the effects of high desalination rate, strong anti-fouling, and not easy to be blocked

Active Publication Date: 2017-09-22
中穗华生态科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the main function of graphene oxide in the above patents is to inhibit bacteria, and it is not the main medium for filtering seawater to desalinate it.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: A graphene oxide-based seawater desalination composite membrane with a thickness of 80 microns. Include microporous ceramic layer, graphene oxide layer and silicon dioxide vapor phase layer sequentially according to the filtration direction; the average filter pore diameter of the microporous ceramic layer is 5 microns, and the average filter pore diameter of the graphene oxide layer is 2 nanometers , the average filter pore size of the silicon dioxide vapor phase layer is 30 microns.

[0035] A preparation method of a graphene oxide-based seawater desalination composite membrane, comprising the steps of:

[0036] (1) preparing ceramic slurry, coating the ceramic slurry on a smooth substrate, drying after rolling, forming a microporous ceramic layer after solidification, and peeling off the microporous ceramic layer from the substrate.

[0037] The ceramic slurry comprises the following components by weight: 50 parts of ceramic micropowder, 15 parts of alumi...

Embodiment 2

[0044] Example 2: A graphene oxide-based seawater desalination composite membrane with a thickness of 50 microns. Include a microporous ceramic layer, a graphene oxide layer and a silicon dioxide gas phase layer in sequence according to the filtration direction; the average filtration pore diameter of the microporous ceramic layer is 1 micron, and the average filtration pore diameter of the graphene oxide layer is 1 nanometer , the average filter pore size of the silicon dioxide gas phase layer is 25 microns.

[0045] A preparation method of a graphene oxide-based seawater desalination composite membrane, comprising the steps of:

[0046] (1) preparing ceramic slurry, coating the ceramic slurry on a smooth substrate, drying after rolling, forming a microporous ceramic layer after solidification, and peeling off the microporous ceramic layer from the substrate.

[0047] The ceramic slurry comprises the following components by weight: 40 parts of ceramic micropowder, 10 parts o...

Embodiment 3

[0054] Example 3: A graphene oxide-based seawater desalination composite membrane with a thickness of 100 microns. Include microporous ceramic layer, graphene oxide layer and silicon dioxide vapor phase layer sequentially according to the filtration direction; the average filter pore diameter of the microporous ceramic layer is 10 microns, and the average filter pore diameter of the graphene oxide layer is 5 nanometers , the average filter pore diameter of the silicon dioxide gas phase layer is 40 microns.

[0055] A preparation method of a graphene oxide-based seawater desalination composite membrane, comprising the steps of:

[0056] (1) preparing ceramic slurry, coating the ceramic slurry on a smooth substrate, drying after rolling, forming a microporous ceramic layer after solidification, and peeling off the microporous ceramic layer from the substrate.

[0057] The ceramic slurry includes the following components by weight: 60 parts of ceramic micropowder, 20 parts of al...

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Abstract

Relating to the technical field of membrane separation, the invention provides a seawater desalination composite membrane based on graphene oxide and a preparation method thereof. The seawater desalination composite membrane comprises a micropore ceramic layer, a graphene oxide layer and a silicon dioxide gaseous phase layer along the filtration direction in order. The micropore ceramic layer has an average filtration pore size of 1-10 micrometers, the graphene oxide layer has an average filtration pore size of 1-5 nanometers, and the silicon dioxide gaseous phase layer has an average filtration pore size of more than 20 micrometers. The seawater desalination composite membrane provided by the invention adopts graphene oxide as the main filtration medium, the filtered desalinated water has a high desalination rate, and the seawater desalination composite membrane has the advantages of strong surface pollution resistance, difficult blockage, and long service life.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a graphene oxide-based seawater desalination composite membrane and a preparation method thereof. Background technique [0002] With the increase of the population on the earth, coupled with the pollution of fresh water resources such as fresh water lakes, rivers, and groundwater, fresh water resources are very scarce. And there are immeasurable water sources in the ocean, if it can be desalinated and utilized, it will undoubtedly completely change the current situation of lack of fresh water. [0003] Currently used seawater desalination methods mainly include seawater freezing method, electrodialysis method, distillation method, reverse osmosis method, and ammonium carbonate ion exchange method. Among them, the application of reverse osmosis membrane method and distillation method is the mainstream in the market. Among them, the distillation method has the technica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B38/00C04B41/89B01D67/00B01D69/12B01D71/02
CPCB01D67/0088B01D67/0095B01D69/12B01D71/024C04B35/62218C04B38/0054C04B41/009C04B41/52C04B41/89C04B2235/3217C04B2235/48C04B2235/483C04B35/00C04B41/4582C04B41/5001C04B41/5035
Inventor 吴小明
Owner 中穗华生态科技(上海)有限公司
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