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Preparation method of ultrafiltration membrane for improving antibacterial property and anti-fouling performance through modified graphene

An anti-pollution, graphene modification technology, applied in the direction of chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of pollution, microbial pollution, etc., to achieve pollution suppression, convenient preparation, good antibacterial properties The effect of anti-pollution

Inactive Publication Date: 2013-03-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter what kind of ultrafiltration membrane it is, the pollution problem during its use has always been the main problem that plagues its wide application, among which microbial pollution is the most serious.
At present, there is little research on this aspect

Method used

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  • Preparation method of ultrafiltration membrane for improving antibacterial property and anti-fouling performance through modified graphene
  • Preparation method of ultrafiltration membrane for improving antibacterial property and anti-fouling performance through modified graphene
  • Preparation method of ultrafiltration membrane for improving antibacterial property and anti-fouling performance through modified graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment provides a kind of preparation method that contains 0.025% modified graphene polysulfone membrane, and specific steps are as follows:

[0046] (1) Add 150mg of graphene oxide and 0.967g of 4-acetylphenylisocyanic acid into 15mL of N-N-dimethylformamide solution respectively, and stir for one day under the protection of nitrogen to form a uniform suspension to make the isocyanate The acidification modification is complete, and then the modified graphene oxide is precipitated with 150mL dichloromethane, collected by filtration with an organic filter membrane with a pore size of 0.22mm, then filtered and rinsed with 50mL dichloromethane, and vacuum-dried at 80°C for 24h to obtain modified graphite alkene;

[0047] (2) Disperse 0.0125g of modified graphene in 40.4875g of N-N dimethylacetamide (DMAC) under ultrasonic conditions, after ultrasonic for 2h, add 0.5g of polyvinylpyrrolidone and 9g of polysulfone to the solution under stirring , after stirring for...

Embodiment 2～4

[0063] Only change the content of modified graphene to be 0.05%, 0.10% and 0.15%, other operations are the same as embodiment 1, and the obtained modified graphene polysulfone membrane has different antibacterial and anti-pollution effects, see figure 2 , 3 , 4.

Embodiment 5～8

[0065] The organic solvent in embodiment 1 is changed into a kind of in N-N-dimethylformamide, methylpyrrolidone, dimethylsulfoxide, hexamethylphosphoramide, and other operations are the same as embodiment 1, and the obtained modified graphite The antibacterial effect of vinyl polysulfone membrane is basically the same as that of Example 1.

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Abstract

The invention discloses a preparation method of an ultrafiltration membrane for improving antibacterial property and anti-fouling performance through modified graphene. The preparation method comprises the following steps in sequence: modifying graphene; drying; adding an organic solvent in modified graphene; dispersing and treating uniformly; adding a membrane additive and a membrane material and uniformly mixing, so as to obtain the membrane casting solution; defoaming the membrane casting solution under vacuum; pouring the membrane casting solution on the surface of a dried and flat plate; stably and quickly scrapping through a membrane scraper; and transferring to gel solution, so as to obtain the ultrafiltration membrane. According to the preparation method, the modified graphene is added, so that the antibacterial property of the ultrafiltration membrane is improved, the application value is high, and the capacities of resisting other pollutions are improved to a certain extent; the modified graphene can be uniformly dispersed into the solvent or the membrane casting solution well, so that the contact and the compatibility of the modified graphene and the membrane can be greatly improved, and more benefits are provided for realizing the characteristics of the modified graphene; and the graphene serving as the raw material is convenient to prepare, and the graphene modification method is simple and easy for industrial production and application.

Description

technical field [0001] The invention relates to the technical field of preparation of ultrafiltration membranes, in particular to a preparation method of an ultrafiltration membrane using modified graphene to enhance antibacterial properties and anti-pollution properties. Background technique [0002] Separation membrane technology is widely used in industry and has become one of the new chemical unit operations. Among them, ultrafiltration membrane technology has been widely used in the separation, concentration and purification of biological products, pharmaceutical products and food industry products, and can also be used for terminal treatment in blood treatment, wastewater treatment and ultrapure water preparation. In my country, ultrafiltration membranes have been successfully used for the concentration and purification of Chinese herbal medicines, fruit juice concentration, waste water recovery, and pretreatment of pure water preparation. With the development of ultr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D71/34B01D71/42B01D69/02B01D67/00
Inventor 赵海洋张林周志军朱浙来
Owner ZHEJIANG UNIV
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