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Super-hydrophilic low-molecular-weight intercepted graphene composite ultrafiltration membrane and manufacturing method thereof

A graphene composite and manufacturing method technology, applied in ultrafiltration, chemical instruments and methods, membranes and other directions, can solve the problems of low retention rate of bovine serum albumin aqueous solution, easily contaminated MBR membrane, short service life, etc. Water and pollution resistance, good mechanical properties and swelling resistance, the effect of increasing flux

Inactive Publication Date: 2021-04-13
迈博瑞生物膜技术(南通)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods use physical barrier methods to separate oil and water from the emulsion by using the unique properties of the material itself, but the MBR membrane is prone to contamination, high cost, low water flux and bovine serum albumin aqueous solution rejection rate, and short service life

Method used

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  • Super-hydrophilic low-molecular-weight intercepted graphene composite ultrafiltration membrane and manufacturing method thereof
  • Super-hydrophilic low-molecular-weight intercepted graphene composite ultrafiltration membrane and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] S1: Pour acetone into N-methylpyrrolidone (NMP), heat to 70°C, add polyvinylpyrrolidone (PVPk30), polyvinylpyrrolidone (PVPk90), polyvinylidene fluoride (PVDF), the polyvinylpyrrolidone ( The mass ratio of PVPK30) to polyvinylpyrrolidone (PVPk90) and polyvinylidene fluoride (PVDF) is 1:1:1.76. After stirring for a period of time, the polysulfone ultrafiltration membrane solution prepared by graphene oxide blending is added, and the polysulfone ultrafiltration membrane liquid is implanted into poly The aminated titanium dioxide nanoparticles on the surface of the sulfone ultrafiltration channel are mixed to make a casting solution for 2 hours after stirring;

[0038] S2: the casting solution obtained in S1 is left to stand for a period of time, and the homogeneous casting solution is obtained after the bubbles are released;

[0039] S3: scrape the homogeneous film casting liquid obtained in S2 into a flat film on a glass plate, put it into deionized water, maintain the w...

Embodiment 2

[0043] S1: Pour acetone into N-methylpyrrolidone (NMP), heat to 70°C, add polyvinylpyrrolidone (PVPk30), polyvinylpyrrolidone (PVPk90), polyvinylidene fluoride (PVDF), the polyvinylpyrrolidone ( The mass ratio of PVPK30) to polyvinylpyrrolidone (PVPk90) and polyvinylidene fluoride (PVDF) is 1:1:1.76. After stirring for a period of time, the polysulfone ultrafiltration membrane solution prepared by graphene oxide blending is added, and the polysulfone ultrafiltration membrane liquid is implanted into poly The aminated titanium dioxide nanoparticles on the surface of the sulfone ultrafiltration channel are mixed to make a casting solution for 2 hours after stirring;

[0044] S2: the casting solution obtained in S1 is left to stand for a period of time, and the homogeneous casting solution is obtained after the bubbles are released;

[0045] S3: scrape the homogeneous film casting liquid obtained in S2 into a flat film on a glass plate, put it into deionized water, maintain the w...

Embodiment 3

[0049] S1: Pour acetone into N-methylpyrrolidone (NMP), heat to 70°C, add polyvinylpyrrolidone (PVk30), polyvinylpyrrolidone (PVPk90), polyvinylidene fluoride (PVDF), the polyvinylpyrrolidone ( The mass ratio of PVPK30) to polyvinylpyrrolidone (PVPk90) and polyvinylidene fluoride (PVDF) is 1:1:1.76. After stirring for a period of time, the polysulfone ultrafiltration membrane solution prepared by graphene oxide blending is added, and the polysulfone ultrafiltration membrane liquid is implanted into poly The aminated titanium dioxide nanoparticles on the surface of the sulfone ultrafiltration channel are mixed to make a casting solution for 2 hours after stirring;

[0050] S2: the casting solution obtained in S1 is left to stand for a period of time, and the homogeneous casting solution is obtained after the bubbles are released;

[0051] S3: scrape the homogeneous film casting liquid obtained in S2 into a flat film on a glass plate, put it into deionized water, maintain the wa...

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Abstract

The invention discloses a super-hydrophilic low-molecular-weight intercepted graphene composite ultrafiltration membrane and a manufacturing method of the super-hydrophilic low-molecular-weight intercepted graphene composite ultrafiltration membrane. The composite ultrafiltration membrane comprises graphene oxide, a polysulfone ultrafiltration membrane prepared by blending the graphene oxide, aminated titanium dioxide nanoparticles implanted into the surface of a polysulfone ultrafiltration pore channel, N-methylpyrrolidone, polyvinylpyrrolidone, polyvinylpyrrolidone, polyvinylidene fluoride, hydrazine hydrate and ammonia water. Compared with an ultrafiltration membrane without doped graphene, the ultrafiltration membrane with higher mass fraction of doped graphene has better mechanical property and swelling resistance, high tensile strength, large water flux and high bovine serum albumin rejection rate, the interaction between organic frameworks is enhanced, the mechanical strength of the organic frameworks is greatly enhanced, the mechanical property of the prepared ultrafiltration membrane is obviously improved, the solvent resistance of the membrane is greatly enhanced, and a remarkable technical effect is achieved.

Description

technical field [0001] The invention relates to the technical field of membrane preparation, in particular to a graphene composite ultrafiltration membrane with ultra-hydrophilic low-molecular cut-off and a manufacturing method thereof. Background technique [0002] The treatment of oil pollution in the current water pollution is the focus of research. The emulsion of oily wastewater is currently the most difficult to deal with. This not only pollutes the natural environment, but also cannot recycle the oil resources in wastewater. The oil-water separation of emulsions through special wetting membrane treatment has become a research hotspot today. However, the emulsion oil-water separation filter membranes prepared by this technology are prone to oil pollution, poor reusability, and high preparation costs. [0003] In recent years, organic solvents have been widely used in petrochemical, printing, coking, leather, pesticides, medicine and other fields. They have the charact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/14B01D67/00B01D65/10
CPCB01D61/145B01D67/0081B01D67/0079B01D67/0095B01D65/10B01D2325/36
Inventor 陈亚
Owner 迈博瑞生物膜技术(南通)有限公司
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