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Functionalized graphene/polyaniline composite filter membrane and preparation method thereof

A composite filtration and polyaniline technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of reduced pollutant retention rate, unfavorable sewage efficient treatment, and larger interlayer distance, etc., to achieve improved retention High efficiency, low production cost, and improved structural stability

Pending Publication Date: 2019-12-13
YANCHENG ZENGCAI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Recently, the most widely used method for sewage treatment is membrane treatment technology, and graphene membrane can realize rapid and effective purification of pollutants by using its layer spacing, which has attracted the attention of science and industry. The hydrophilic effect causes the distance between layers in water to become larger, and it is unstable in water and easy to dissolve in water, thereby reducing the interception rate of pollutants, which is not conducive to its efficient treatment of sewage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve graphene oxide solution and diamine solution in water, ultrasonically disperse, and attach graphene oxide cross-linked by ethylenediamine to mixed cellulose ester by coating method, with a loading capacity of 30mg / m 2 , soak it in the hydrochloric acid solution of aniline and ammonium persulfate for 6 hours, remove ungrafted polyaniline, and obtain graphene oxide / polyaniline composite film. The water flux of the composite membrane is 97L / (m 2 h), the permeation flux to 0.05mol / L copper ion is 94L / (m 2 h), the rejection rate can reach 62%, and the permeation flux to methylene blue is 71L / (m 2 • h) The rejection rate is 90%.

Embodiment 2

[0023] Use p-aminobenzenesulfonic acid to functionalize graphene oxide, and attach functionalized graphene oxide to mixed cellulose ester by coating method, with a loading capacity of 100mg / m 2 , soak it in the hydrochloric acid solution of aniline and ammonium persulfate for 8 hours, remove ungrafted polyaniline, and obtain graphene oxide / polyaniline composite film. The water flux of the composite membrane is 63L / (m 2 h), the permeation flux to 0.05mol / L copper ion is 55L / (m 2 h), the rejection rate can reach 49%, and the permeation flux to methylene blue is 43L / (m 2 • h) Rejection rate of 94%.

Embodiment 3

[0025] Use butanediamine to functionalize graphene oxide, and attach functionalized graphene oxide to mixed cellulose ester by coating method, with a loading capacity of 100mg / m 2 , soak it in the hydrochloric acid solution of aniline and ammonium persulfate for 12 hours, remove ungrafted polyaniline, and obtain graphene oxide / polyaniline composite film. The water flux of the composite membrane is 93L / (m 2 h), the permeation flux to 0.05mol / L copper ion is 82L / (m 2 h), the rejection rate can reach 39%, and the permeation flux to methylene blue is 76L / (m 2 • h) Rejection rate of 83%.

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Abstract

The invention discloses a functionalized graphene / polyaniline composite filter membrane and a preparation method thereof, and aims to provide a membrane material used for water treatment. The grapheneoxide / polyaniline composite membrane comprises a matrix, functionalized graphene oxide and polyaniline grafted on the surface of a functionalized graphene oxide membrane. The preparation method comprises the following steps: functionalizing the graphene oxide, preparing a membrane on the matrix, immersing the matrix with the membrane in a mixed acid solution of aniline and ammonium persulfate, performing a reaction for a certain time, taking out the obtained material, and removing the polyaniline on the surface to obtain the functionalized graphene oxide / polyaniline composite filter membrane.The functionalized graphene oxide / polyaniline composite filter membrane has the advantages of simple preparation process, low cost and good purification effect.

Description

technical field [0001] A functionalized graphene / polyaniline composite filter membrane and a preparation method thereof belong to the field of water treatment and membrane materials. Background technique [0002] Water resources are the material basis for human survival. However, with the growth of the world's population and the continuous development of industrialization, the crisis of water resources faced by mankind is becoming more and more serious, especially in my country with a large population, uneven distribution of water resources, and water shortages. increasingly serious. In addition, since our country is in a stage of rapid development and the awareness of environmental protection is not strong, various pollutants are directly discharged without treatment, causing serious pollution of large areas of rivers and lakes, directly aggravating the water resource crisis in our country. Therefore, how to efficiently utilize water resources has become the focus and focus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00C02F1/44C02F101/20C02F101/30
CPCB01D69/12B01D67/0079C02F1/44C02F2101/308C02F2101/20
Inventor 闵永刚张诗洋刘屹东
Owner YANCHENG ZENGCAI SCI & TECH
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