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Guanidyl-functionalized graphene oxide/polysulfone ultrafiltration membrane and preparation method thereof

A polysulfone ultrafiltration membrane and amino functionalization technology are applied in the field of guanidine functionalized graphene oxide/polysulfone ultrafiltration membrane and its preparation, which can solve the problems of impairing membrane performance, increasing operating costs and the like, and improving separation performance. , and the effect of anti-pollution improvement and pure water flux improvement

Inactive Publication Date: 2019-11-12
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Several methods currently applied to control membrane biofouling: raw material pretreatment, addition of bactericides and membrane cleaning have the disadvantages of increasing operating costs and impairing membrane performance

Method used

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  • Guanidyl-functionalized graphene oxide/polysulfone ultrafiltration membrane and preparation method thereof
  • Guanidyl-functionalized graphene oxide/polysulfone ultrafiltration membrane and preparation method thereof
  • Guanidyl-functionalized graphene oxide/polysulfone ultrafiltration membrane and preparation method thereof

Examples

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Effect test

example 1

[0035] A kind of preparation method of guanidine functionalized graphene oxide / polysulfone ultrafiltration membrane is as follows:

[0036] (1) Preparation of AFG: 100mg GO, 40mL thionyl chloride and 2ml DMF were mixed in a flask. After sonication to fully disperse GO in the solvent, the mixture was stirred at 60 °C for 12 h. The acylated intermediate was separated by centrifugation, washed with dry DMF, and transferred directly to 25 mL of 1,6-hexanediamine heated to 45 °C. The mixture was stirred evenly at 50 °C, the product was washed with water several times, and then dried under vacuum at room temperature.

[0037] (2) Preparation of GFG: 50mg AFG, 3g OMIU and 50mL water were mixed in a flask so that the solution was uniformly dispersed, and then the pH of the solution was adjusted to 11 by NaOH aqueous solution. The mixture was stirred at 40 °C and quenched by adding 2 mL of TFA. After washing with water, the product was dried under vacuum at room temperature.

[003...

example 2

[0042] A kind of preparation method of guanidine functionalized graphene oxide / polysulfone ultrafiltration membrane is as follows:

[0043](1) Preparation of AFG: 150 mg GO, 30 mL thionyl chloride and 1 mL DMF were mixed in a flask. After sonication to fully disperse GO in the solvent, the mixture was stirred at 100 °C for 16 h. The acylated intermediate was separated by centrifugation, washed twice with dry DMF, and transferred directly to 35 mL of 1,6-hexanediamine heated to 40 °C. The mixture was stirred evenly at 40 °C, the product was washed with water several times, and then dried under vacuum at room temperature.

[0044] (2) Preparation of GFG: 10 mg AFG, 2 g OMIU and 30 mL water were mixed in a flask to make the solution uniformly dispersed, and then the pH of the solution was adjusted to 11 by NaOH aqueous solution. The mixture was stirred at 60 °C and quenched by adding 1 mL of TFA. After washing with water, the product was dried under vacuum at room temperature....

example 3

[0049] A kind of preparation method of guanidine functionalized graphene oxide / polysulfone ultrafiltration membrane is as follows:

[0050] (1) Preparation of AFG: 200 mg GO, 45 mL thionyl chloride and 5 mL DMF were mixed in a flask. After sonication to fully disperse GO in the solvent, the mixture was stirred at 80 °C for 30 h. The acylated intermediate was separated by centrifugation, washed twice with dry DMF, and transferred directly to 40 mL of 1,6-hexanediamine heated to 60 °C. The mixture was stirred evenly at 60 °C, the product was washed with water several times, and then dried under vacuum at room temperature.

[0051] (2) Preparation of GFG: 100 mg AFG, 4 g OMIU and 50 mL water were mixed in a flask so that the solution was uniformly dispersed, and then the pH of the solution was adjusted to 11 by NaOH aqueous solution. The mixture was stirred well at 60 °C and quenched by adding 5 mL of TFA. After washing with water, the product was dried under vacuum at room te...

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Abstract

The invention discloses a guanidyl-functionalized graphene oxide / polysulfone ultrafiltration membrane and a preparation method thereof. The preparation method for the guanidyl-functionalized grapheneoxide / polysulfone blended matrix membrane comprises the following steps: performing an amidation reaction with a carboxyl group on a graphene oxide sheet as a modification site; then subjecting acyl chloride on graphene and an amino group on 1,6-hexanediamine to an amidation reaction to obtain amino-functionalized graphene oxide; then subjecting an amino group on the amino-functionalized grapheneoxide and a methoxy group on O-methylisourea hemisulfate to a nucleophilic substitution reaction so as to generate guanidyl-functionalized graphene oxide; and preparing the guanidyl-functionalized graphene oxide / polysulfone blended matrix membrane by using a non-solvent induced phase inversion process. The guanidyl-functionalized graphene oxide / polysulfone ultrafiltration membrane prepared in theinvention is improved in pure water flux, separation performance and anti-pollution performance, has high antibacterial activity against Escherichia coli and Staphylococcus aureus, and shows excellentantimicrobial properties.

Description

[0001] (1) Technical field [0002] The invention relates to a guanidine functionalized graphene oxide / polysulfone ultrafiltration membrane and a preparation method thereof. [0003] (2) Technical background [0004] Ultrafiltration is a low-pressure membrane filtration process that can be widely used in the purification of natural water and wastewater. Its pore size is usually limited to arrive Common ultrafiltration membrane materials are mostly made of hydrophobic membrane materials, such as polyethersulfone (PES), polyvinylidene fluoride (PVDF) and polysulfone (PSF). Compared with inorganic membranes, polymer membranes have lower cost, higher permeability and tunable pore size for wider applications. The use of ultrafiltration in drinking water production has experienced accelerated growth over the past decade. Membrane fouling may be a major obstacle to the wider implementation of ultrafiltration membranes, usually resulting in higher energy, operation and maintenanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D71/68B01D71/02B01D69/02B01D67/00
CPCB01D67/0079B01D69/02B01D71/021B01D71/68B01D71/82B01D2325/48
Inventor 张国亮周敏徐泽海孟琴
Owner ZHEJIANG UNIV OF TECH
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