Graphene micro-ultrafiltration membrane and preparation method thereof

A technology of graphene and ultrafiltration membranes, applied in ultrafiltration, chemical instruments and methods, membranes, etc., can solve the problems of single surface functional groups and not as widely used as graphene oxide, and achieve the goal of improving membrane performance and hydrophilicity Effect

Active Publication Date: 2021-03-12
盐城海普润科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with graphene oxide, the surface functional groups of graphene are relatively s

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Example 1

[0033] (1) 0.5 g of super branched polyester (grade: H4OP) was dissolved in 34.45 g, N-dimethylformamide under 40 ° C, stirring conditions, and hyperbranched polyester solution was obtained.

[0034] (2) 0.025 g of oxide oxide, 0.025 g of graphene and step 1) were mixed, and an ultrasound was more than 30 min to prepare a graphene / oxide oxide / supened polyester solution.

[0035] (3) At 90 ° C, stirring conditions, 15 g of polyether sulfone and step 2) were mixed, dissolved for 2 h, filtered, deck, and produced graphene casting. Membrane;

[0036] (4) Painting 2 layers of 1.8 cm wide transparent tape in the 20 cm × 20 cm glass plate, and the graphene cast film solution obtained by step 3) is scrapened in the internal range of the transparent tape obtained by the glass sheet. Immediately in water is placed in water for 10 min, washed, dried to dry the graphene ultrafiltration membrane;

[0037] (5) The graphene ultrafiltration membrane obtained by step 4) at 6...

Example Embodiment

[0038] Example 2

[0039] (1) 5 g of super branched polyester (grade: H2OP) was dissolved in 39.5 g, N-dimethyl sulfoxide under 50 ° C, stirring conditions, and hyperbranched polyester solution was obtained.

[0040] (2) 0.25 g of oxide oxide, 0.25 g of graphene and step 1) were mixed, and a graphene / oxide / hyperfrankened polyester solution was prepared by tapping.

[0041] (3) Under 40 ° C, stirring conditions, 5 g of cellulose and step 2) made of graphene / oxide oxide / supected polyester solution, dissolved 2 h, filtered, deret, and produced graphene casting Membrane;

[0042] (4) When the graphene cast film liquid obtained by step 3) (a solution having a mass concentration of 1% hyperboundary polyester and mass concentration of 99% acetone) is simultaneously subjected to graphene Liquid film, immediately placed in a mass concentration of 40% N, N-dimethyl sulfoxide aqueous solution, washed, washed, and dried to produce a graphene ultrafiltration membrane;

[0043] (5) The ...

Example Embodiment

[0044] Example 3

[0045] (1) 10 g of dendritic polyamide (grade: CYD-110H) was dissolved in 31.5 g, N-dimethylacetamide under 80 ° C, stirring conditions, and a dendrimide amide solution was prepared;

[0046](2) 0.5 g of graphene, 0.5 g of graphene and step 1) were mixed with a dendritic polyamide ammine solution, and a graphene / gosa / dendrimide solution was produced.

[0047] (3) At 80 ° C, 7.5 g of polypropylene nitrile and step 2), a graphene / grate-forming polyamide solution prepared, dissolved for 2 h, filtered, deck, and produced graphite. Elencof membrane;

[0048] (4) Painting 2 layers of 1.8 cm wide transparent tape in the 20 cm × 20 cm glass plate, and the graphene cast film solution obtained by step 3) is scrapened in the internal range of the transparent tape obtained by the glass sheet. Immediately inserted with a mass concentration of 20% N, N-dimethylacetamide, washed, washed, dried to dry the graphene ultrafiltration membrane;

[0049] (5) The graphene ultraf...

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Abstract

The invention discloses a graphene micro-ultrafiltration membrane and a preparation method thereof, and particularly discloses a preparation method of the graphene micro-ultrafiltration membrane. Themethod comprises the following steps: dissolving graphene, graphene oxide, dendritic macromolecules and high-molecular polymers in a solvent to obtain a membrane casting solution, scraping or spinningor coating the membrane casting solution on the outer surface of a hollow fiber braided tube, performing solidifying, performing washing with water, performing airing, crosslinking glutaraldehyde, and performing drying. According to the preparation method, hydrophilic dendritic macromolecules and graphene oxide are introduced into the graphene micro-ultrafiltration membrane, so that the hydrophilicity of the membrane can be remarkably improved; graphene and graphene oxide are coated with a dendritic macromolecular solution, so that graphene and graphene oxide are uniformly and stably dissolved in a solvent, and stable dispersion of graphene and graphene oxide in a membrane casting solution is facilitated. Through glutaraldehyde, active groups such as hydroxyl and amino in dendritic macromolecules and graphene oxide are subjected to cross-linking polymerization reaction, so that the compatibility and stability between high-molecular polymers and the dendritic macromolecules and betweenthe graphene oxide and the graphene are improved, and the membrane performance is improved.

Description

technical field [0001] The invention relates to the field of water treatment separation membranes, in particular to a graphene micro-ultrafiltration membrane and a preparation method thereof. Background technique [0002] With the continuous development of industry and agriculture, according to relevant predictions, by 2025, more than 3 billion people in the world will face the problem of water shortage, and more than 40 countries and regions will experience serious shortage of fresh water, and the problem of water pollution is becoming a problem. The main problems that people will face in life and survival. In response to the crisis of fresh water resources and the sustainable utilization of water resources, the most effective method is to "increase revenue and reduce expenditure". At present, the main methods used are desalination of seawater, that is, to obtain fresh water from the sea that accounts for 70% of the earth's surface; for domestic sewage, industrial wastewate...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D61/14B01D67/00
CPCB01D71/021B01D61/145B01D67/0048B01D2325/36B01D2325/24Y02A20/131
Inventor 刘必前
Owner 盐城海普润科技股份有限公司
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