Polymer/graphene hybridization nanofiltration composite membrane and preparation method thereof

A graphene and composite membrane technology, applied in the field of membrane separation, can solve the problems of low permeability and low permeability selectivity, and achieve the effect of improving performance

Active Publication Date: 2013-03-27
浙江欧托电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] High-performance nanofiltration membranes have always been the goal pursued by researchers, but because the permeability and permselectivity of polymer membranes are often contradictory, that is, high-permeability polymer membranes usually have low permeation selectivity, while the permselectivity Higher polymer membranes are generally less permeable, the so-called "Robeson" effect

Method used

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  • Polymer/graphene hybridization nanofiltration composite membrane and preparation method thereof
  • Polymer/graphene hybridization nanofiltration composite membrane and preparation method thereof
  • Polymer/graphene hybridization nanofiltration composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of aqueous medium: dissolve and disperse piperazine and graphene oxide in ultrapure water, and disperse them evenly by ultrasonication for 15 minutes. / L of aqueous medium.

[0032] (2) Preparation of oil phase medium: dissolve trimesoyl chloride in n-heptane, and prepare the mass fraction of trimesoyl chloride to be 7.5×10 -4 mol / L oil phase medium.

[0033] (3) Immerse the wet polysulfone porous support membrane into the water phase medium, take it out after immersion for 10 minutes, roll the surface of the support membrane with a rubber roller, remove the excess aqueous solution on the surface of the polysulfone porous support membrane, and then the polysulfone porous support membrane The surface of the support membrane is in contact with the oil phase medium on one side to carry out a polymerization reaction for 40 seconds to obtain a nascent hybrid nanofiltration composite membrane.

[0034] (4) The nascent hybrid nanofiltration composite membran...

Embodiment 2-4

[0037] Except that the concentration of graphene oxide in the aqueous medium is adjusted, all the others are the same as in Example 1.

[0038] The polymer / graphene hybrid nanofiltration composite membrane prepared in Examples 2-4 was tested for water flux and NaCl rejection, and the results are shown in Table 1.

[0039] Table 1

[0040]

[0041] Examples 1-4 are to investigate the influence of graphene oxide concentration in the aqueous medium on the water flux and NaCl rejection rate of the prepared polymer / graphene hybrid nanofiltration composite membrane.

Embodiment 5-7

[0043] Example 5 is the same as Example 1 except that aminated graphene is used in the aqueous medium.

[0044] Embodiments 6-7 are the same as Embodiment 5 except that the concentration of aminated graphene in the aqueous medium is adjusted.

[0045] The polymer / graphene hybrid nanofiltration composite membrane that embodiment 5-7 makes is carried out water flux and Na 2 SO 4 The retention rate test, the results are shown in Table 2.

[0046] Table 2

[0047]

[0048] Embodiment 5-7 is to investigate the polymer / graphene hybrid nanofiltration composite film water flux and Na 2 SO 4 Influence on retention rate.

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Abstract

The invention discloses a polymer / graphene hybridization nanofiltration composite membrane and a preparation method of the polymer / graphene hybridization nanofiltration composite membrane. The nanofiltration composite membrane is formed by forming a layer of polymer functional cortex containing graphene on a polysulfone porous support membrane through an interface polymerization technique. The graphene is effectively introduced into the functional cortex of the nanofiltration membrane by using the unique two-dimensional nanopore structure and good molecular mass transfer channel effect of the graphene, so that the performance of the nanofiltration composite membrane can be improved.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a graphene-containing hybrid nanofiltration composite membrane and a preparation method thereof. Background technique [0002] As a new type of membrane separation technology, nanofiltration membrane technology is used in the advanced treatment and safety assurance of drinking water, the softening of cooling water in the power industry, the separation, purification and concentration of substances in petroleum, chemical, food, biological and pharmaceutical industries, and in industrial wastewater. It has broad application prospects in fields such as the removal of organic matter. [0003] The interfacial polymerization method is the main preparation process of nanofiltration composite membrane at present. It uses two highly reactive monomers to undergo polycondensation reaction at the interface between the immiscible water phase medium and the oil phase med...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/12B01D69/10B01D67/00
Inventor 吴礼光王挺杜春慧
Owner 浙江欧托电气有限公司
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