Modified ultrafiltration membrane and preparation method thereof

An ultrafiltration membrane and a modification technology are applied in the field of modified ultrafiltration membranes and their preparation to achieve the effects of alleviating the problem of membrane fouling, good hydrophilicity and enhanced anti-fouling performance

Active Publication Date: 2017-02-15
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a modified ultrafiltration membrane and its preparation method, which can greatly alleviate the membrane fouling problem generated during the application process of the membrane

Method used

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  • Modified ultrafiltration membrane and preparation method thereof
  • Modified ultrafiltration membrane and preparation method thereof
  • Modified ultrafiltration membrane and preparation method thereof

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Embodiment Construction

[0022] see figure 1 , figure 1 It is a schematic flowchart of a method for preparing a modified ultrafiltration membrane provided in an embodiment of the present invention. As shown in the figure, the method of this embodiment includes the following steps:

[0023] S101: preparing a polyvinylidene fluoride ultrafiltration membrane.

[0024] In the embodiment of the present invention, a polyvinylidene fluoride (PVDF) ultrafiltration membrane was prepared by a submerged phase inversion method. The immersion phase inversion method is to configure a homogeneous polymer solution of a certain composition, change the thermodynamic state of the solution through a certain physical method, and make it phase-separate from the homogeneous polymer solution, and finally transform into a three-dimensional macromolecular network. gel structure.

[0025] S102: soaking the polyvinylidene fluoride ultrafiltration membrane in the nanofiber boehmite solution to obtain a modified ultrafiltration...

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Abstract

The invention discloses a modified ultrafiltration membrane and a preparation method thereof. The preparation method of the modified ultrafiltration membrane comprises the steps of preparing a polyvinylidene fluoride ultrafiltration membrane, and then soaking the polyvinylidene fluoride ultrafiltration membrane in a nano-fiber boehmite solution to obtain the modified ultrafiltration membrane. By virtue of the above mode, the modified PVDF (polyvinylidene fluoride) ultrafiltration membrane with a strong hydrophilic property, a high membrane flux, and a strong anti-pollution capacity can be obtained.

Description

technical field [0001] The invention relates to a modified ultrafiltration membrane and a preparation method thereof. Background technique [0002] Membrane separation technology has been widely used in sewage treatment and reuse in recent years. He has made outstanding contributions to solving problems such as water resource shortage, sewage treatment and resource utilization, and landfill leachate treatment. However, there are significant membrane fouling phenomena in membrane separation technology, that is, pollutants are adsorbed and deposited on the membrane surface or in the membrane pores due to external factors such as the adhesion layer formed on the membrane surface or the clogging of the membrane pores, which reduces the membrane flux and the membrane separation characteristics. phenomenon of change. This greatly limits the wide application of membrane separation technology and increases the application cost, which limits the rapid development of membrane techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D67/00B01D61/14
CPCB01D61/145B01D67/0088B01D71/34
Inventor 孙飞云孙婷婷董文艺李继
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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