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Catalytic membrane, preparation method and application thereof

A catalytic membrane and base membrane technology, applied in the field of membrane materials, can solve the problems of increasing cleaning costs, limiting the application scope of membrane materials, affecting the properties of liquid components, etc., to achieve self-cleaning, anti-pollution, and reducing adhesion effects.

Active Publication Date: 2020-06-26
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the Fenton reaction requires a continuous flow of H 2 o 2 , not only increase the cleaning cost, but also catalyze and oxidize other solutes in the feed liquid, affect the properties of the feed liquid components, and greatly limit the application range of membrane materials

Method used

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  • Catalytic membrane, preparation method and application thereof
  • Catalytic membrane, preparation method and application thereof
  • Catalytic membrane, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0073] This embodiment provides a catalytic membrane, the preparation method is as follows:

[0074] (1) Dissolve tannic acid and ferric chloride in 10mM Tris-HCl buffer solution (pH is 8.5) respectively, prepare the tannic acid solution with a concentration of 4g / L and the trichlorohydrin solution with a concentration of 2g / L ferric chloride solution; place the basement membrane (polyethersulfone nanofiltration membrane with a molecular weight cut-off of 1000Da) in the filter forward, wet the membrane surface with 10mL ferric chloride solution for 3min, then add 10mL tannic acid solution, React at room temperature for 1 min at 100 rpm to obtain a mixed coating of tannic acid and ferric chloride on the surface of the base film; shake it with deionized water at 150 rpm for 1 h to wash off excess reaction solution;

[0075] (2) Place the polyglutamic acid solution (solvent being 10mM Tris-HCl buffer solution, pH 8.5) with a concentration of 2g / L on the basement membrane with the...

Embodiment 2

[0079] The present embodiment provides a kind of catalytic membrane, and the difference of its preparation method and embodiment 1 is only, the polyglutamic acid in the step (2) is replaced with the glutamic acid of equal mass.

[0080] The schematic diagram of the structure of the catalytic membrane obtained in this embodiment is as follows: figure 2 Shown, wherein, 1 is base film, 2 is the mixed coating of tannic acid and ferric chloride, 3 is hydrophilic active substance (glutamic acid), 4 is enzyme.

Embodiment 3

[0082] This embodiment provides a catalytic membrane, the difference between its preparation method and embodiment 1 is that the polyglutamic acid in step (2) is replaced with polyaspartic acid of equal mass.

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Abstract

The invention provides a catalytic membrane, a preparation method and application thereof. The catalytic membrane comprises a base membrane and a hybrid hydrophilic modification layer arranged on thesurface of the base membrane, wherein enzyme is immobilized on the hybrid hydrophilic modification layer, and the hybrid hydrophilic modification layer comprises a mixed coating of tannic acid and ferric trichloride, and a hydrophilic active substance grafted on the mixed coating. According to the invention, in the catalytic membrane, the hybrid hydrophilic modification layer and the enzyme are introduced, so that the membrane has the membrane pollution control characteristic of enzyme-chemical reaction synergistic self-cleaning, the antibacterial, anti-pollution and self-cleaning functions ofthe catalytic membrane under various offline and online conditions can be met, a certain anti-pollution effect is achieved for various organic pollutants, colloid pollution and combined pollution, membrane pollution can be reduced by 60% or above, and irreversible pollution is reduced by 30% or above; and the preparation process is simple, can be repeatedly used, and has a huge application prospect.

Description

technical field [0001] The invention belongs to the technical field of membrane materials, and in particular relates to a catalytic membrane and its preparation method and application. Background technique [0002] Membrane separation technology is an environmentally friendly, efficient and convenient separation technology, which has been widely used in various catalytic reactions, functional conversion and water treatment in recent years. Membrane fouling is one of the main bottlenecks in the application of membrane separation technology. Severe membrane fouling limits the sustainable operation of membrane separation with high efficiency and low energy consumption. Pollutants accumulating on the membrane surface or entering the membrane pores will form a filter cake layer and block the membrane pores, resulting in an increase in transmembrane resistance and a decrease in permeation flux, affecting production efficiency and product quality, increasing cleaning frequency, and...

Claims

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Application Information

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IPC IPC(8): B01D71/74B01D69/02B01D67/00B01J31/06B01J31/30
CPCB01D67/0079B01D69/02B01D71/74B01D2325/36B01D2325/48B01J31/003B01J31/06B01J31/30
Inventor 罗建泉张晋瑄万印华
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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