Anti-pollution composite graphene oxide nanofiltration membrane and production method thereof

A composite oxidation and graphene membrane technology, applied in the field of nanofiltration membranes, can solve problems such as poor stability and integrity, and easy damage of graphene oxide membranes

Inactive Publication Date: 2017-06-20
INST OF NEW ENERGY SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an anti-pollution composite graphene oxide nanofiltration membrane to solve the technical problems of the prior art that the graphene oxide membrane is easily damaged and has poor stability and integrity, and at the same t

Method used

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  • Anti-pollution composite graphene oxide nanofiltration membrane and production method thereof
  • Anti-pollution composite graphene oxide nanofiltration membrane and production method thereof

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preparation example Construction

[0023] Correspondingly, the embodiment of the present invention also provides a method for preparing an anti-pollution composite graphene oxide nanofiltration membrane, which can be used to prepare the above-mentioned nanofiltration membrane, which includes the following steps:

[0024] S01, using the immersion precipitation phase inversion method to prepare the above-mentioned basement film;

[0025] S02, preparing the above-mentioned graphene oxide film on the base film;

[0026] S03. On the graphene oxide film, polyvinyl alcohol is cross-linked with the above-mentioned cross-linking agent to form a cross-linked film with a porous structure that does not affect the function of the graphene oxide film, wherein the cross-linking agent is a binary aldehyde or horseradish to acid anhydride.

[0027] Specifically, in the step S01, the base film may be prepared using existing technologies. The base film material can be selected from conventional polymers, preferably the above-me...

Embodiment 1

[0060] (1) Graphene oxide aqueous solution is prepared by Hummers method

[0061] Put flake graphite as raw material in a container, add concentrated sulfuric acid with a mass fraction of 98%, keep the temperature of the mixture at 0°C in an ice-water bath, then add potassium permanganate, and stir evenly at a temperature lower than 20°C. Add 50.0ml of concentrated sulfuric acid to every 1.0g of graphite flakes, the quality of potassium permanganate is 4 times that of graphite flakes, and place it in a constant temperature water bath to heat up to 35°C and keep it for 1.5h; Dilute with water, heat up to 90°C in a constant temperature water bath, keep it for 30 minutes, then add hydrogen peroxide solution with a mass fraction of 30%, cool to room temperature, the solution changes from brown to khaki, where concentrated sulfuric acid: ultrapure water: hydrogen peroxide The volume ratio is 50:100:10.

[0062] Filter the above solution to obtain a brown paste colloid, wash the co...

Embodiment 2

[0070] (1) Graphene oxide aqueous solution is obtained by the Hummers method.

[0071] Put flake graphite as raw material in a container, add concentrated sulfuric acid with a mass fraction of 98%, keep the temperature of the mixture at 0°C in an ice-water bath, then add potassium permanganate, and stir evenly at a temperature lower than 20°C. Add 50.0ml of concentrated sulfuric acid to every 1.0g of graphite flakes, the quality of potassium permanganate is 4 times that of graphite flakes, and place it in a constant temperature water bath to heat up to 35°C and keep it for 1.5h; Dilute with water, heat up to 90°C in a constant temperature water bath, keep it for 30 minutes, then add hydrogen peroxide solution with a mass fraction of 30%, cool to room temperature, the solution changes from brown to khaki, where concentrated sulfuric acid: ultrapure water: hydrogen peroxide The volume ratio is 50:100:10.

[0072]Filter the above solution to obtain a brown paste colloid, wash th...

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Abstract

The invention discloses an anti-pollution composite graphene oxide nanofiltration membrane. The anti-pollution composite graphene oxide nanofiltration membrane comprises a base membrane and a graphene oxide membrane used as a separation layer, the base membrane is covered with the graphene oxide membrane, and the graphene oxide membrane is covered with a cross-linking membrane for protecting the graphene oxide membrane, wherein the cross-linking membrane is obtained through cross-linking polyvinyl alcohol and a cross-linking agent, the cross-linking agent is dialdehyde or maleic anhydride, and the cross-linking membrane has a porous structure. The invention also discloses a method for producing the anti-pollution composite graphene oxide nanofiltration membrane. The production method comprises the production of a cross-linking layer. The method is simple to operate and is easy to implement.

Description

technical field [0001] The invention relates to a nanofiltration membrane, in particular to an anti-pollution composite graphene oxide nanofiltration membrane and a preparation method thereof. Background technique [0002] As a new type of membrane separation technology, nanofiltration membrane technology has broad application prospects in the fields of water treatment, separation, purification and concentration of substances in petroleum, chemical, food, biological and pharmaceutical industries, and removal of organic matter in industrial wastewater. The preparation methods of nanofiltration membranes mainly include LS phase inversion method, blending method, charging method and composite method. The most widely used and effective method for preparing nanofiltration membranes is the composite method. Among them, the interfacial polymerization method is the composite method. The most widely used method. Although the nanofiltration membrane prepared by the interfacial polyme...

Claims

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Application Information

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IPC IPC(8): B01D71/38B01D69/12B01D61/00B01D67/00
CPCB01D71/38B01D61/027B01D67/0079B01D69/12
Inventor 王建强慈立杰茆胜
Owner INST OF NEW ENERGY SHENZHEN
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