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Multi-functional hybrid ultra-filtration membrane as well as preparation method and application thereof

A multi-functional, ultrafiltration membrane technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve the problems of no oxidation selectivity, poor pollutant removal effect, etc. The effect of improving the removal efficiency

Active Publication Date: 2019-05-14
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the defect that the multifunctional catalytic ultrafiltration membrane in the prior art does not have oxidation selectivity and the removal effect of pollutants is not good, the present invention provides a multi-layer multifunctional hybrid ultrafiltration membrane, which uses the skin layer to first intercept large Molecular substances, and then use the support layer to catalyze the oxidation of small molecular substances, improve the selectivity of advanced oxidation, and improve the removal effect of pollutants

Method used

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  • Multi-functional hybrid ultra-filtration membrane as well as preparation method and application thereof
  • Multi-functional hybrid ultra-filtration membrane as well as preparation method and application thereof
  • Multi-functional hybrid ultra-filtration membrane as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] In this example, a method for preparing a multifunctional hybrid ultrafiltration membrane catalytic oxidation selectivity is provided to prepare a PVDF / MIL-PVDF membrane. The steps are as follows:

[0048] (1) Granular material preparation

[0049] MIL-53(Fe) particles were prepared, washed with water and alcohol several times in sequence, dried and activated by heating in vacuum.

[0050] (2) Preparation of blended casting solution

[0051] Dissolve 0.5g of polyvinylidene fluoride (PVDF) into 5mL of N,N-dimethylformamide, mix well until the polymer is completely dissolved, and dissolve 0.5g of MIL-53(Fe) particles in step (1) Add it into the solution, mix well, add 0.25g of polyvinylpyrrolidone, mix well until completely dissolved, and obtain a blended casting solution.

[0052] (3) Preparation of support layer

[0053] The blended film casting solution obtained in step (2) is manually applied and scraped on the non-woven fabric by a film scraper, and the organic so...

Embodiment 2

[0087] In this embodiment, a kind of preparation method that improves the catalytic oxidation selectivity of multifunctional hybrid ultrafiltration membrane is provided, and chitosan / Fe 2 o 3 - Polyethersulfone membrane, as follows:

[0088] (1) Granular material preparation

[0089] Preparation of Fe 2 o 3 Granules, pickled, then washed with water until neutral, dried and roasted at high temperature.

[0090] (2) Preparation of blended casting solution

[0091] Dissolve 0.5g of polyethersulfone into 5mL of N,N-dimethylacetamide, mix well until the polymer is completely dissolved, and dissolve 0.5g of Fe in step (1) 2 o 3 Add the particles into the solution, mix well, add 0.25g of polyethylene glycol, mix well until completely dissolved, and obtain a blended casting solution.

[0092] (3) Preparation of support layer

[0093] The blended casting solution obtained in step (2) is scraped on a glass plate by automatic scraping film, and the organic solvent is removed by n...

Embodiment 3

[0099] In this example, a preparation method for improving the catalytic oxidation selectivity of a multifunctional hybrid ultrafiltration membrane is provided, and a polyethersulfone / MIL-53(Cu)-polyacrylonitrile membrane is prepared. The steps are as follows:

[0100] (1) Granular material preparation

[0101] MIL-53(Cu) particles were prepared, washed several times with water and alcohol successively, dried and activated by heating in vacuum.

[0102] (2) Preparation of blended casting solution

[0103] Dissolve 0.5g of polyacrylonitrile into 5mL of N,N-dimethylformamide, mix well until the polymer is completely dissolved, add 0.5g of MIL-53(Cu) particles in step (1) to the solution , fully mixed evenly, adding 0.25g of polyvinylpyrrolidone, fully mixed until completely dissolved, to obtain a blended casting solution.

[0104] (3) Preparation of support layer

[0105] The blended casting solution obtained in step (2) was manually scraped on the aluminum foil with a film s...

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Abstract

The invention discloses a multi-functional hybrid ultra-filtration membrane as well as a preparation method and application thereof, and belongs to the technical field of membrane separation for watertreatment. The ultra-filtration membrane comprises a skin layer and a supporting layer, wherein the skin layer is used for ultra-filtration interception; the supporting layer is used for catalyzing,oxidizing and decomposing organic matters; the skin layer is positioned on the supporting layer; the supporting layer comprises a functional granular material with advanced oxidation catalytic activity. The preparation method of the ultra-filtration membrane comprises the preparation processes: a) dissolving a supporting layer membrane matrix polymer into an organic solvent to prepare a solution A; b) adding the functional granular material with advanced oxidation catalytic activity into the solution A, uniformly mixing, preparing a blended membrane casting solution and preparing the supporting layer by utilizing the blended membrane casting solution; c) membrane-forming a skin layer membrane casting solution on the supporting layer and preparing the skin layer. The ultra-filtration membrane disclosed by the invention not only can improve the advanced oxidation selectivity and improve the removal effect of pollutants, but also can effectively reduce the addition of an oxidant, improvethe stability of the ultra-filtration membrane and prolong the service life.

Description

technical field [0001] The invention belongs to the technical field of membrane separation for water treatment, and in particular relates to a multifunctional hybrid ultrafiltration membrane, a preparation method and an application. Background technique [0002] Traditional ultrafiltration membrane technology has the advantages of low operating cost and considerable treatment effect on viruses, high molecular organic matter, colloids and other pollutants, and has been widely used in wastewater treatment. However, ultrafiltration membranes cannot effectively remove small molecular organics in water, and the removal of these pollutants is particularly important in the advanced treatment of wastewater. In order to solve this problem, a new generation of multifunctional ultrafiltration membrane technology coupled with traditional ultrafiltration membrane technology and other treatment methods needs to be developed urgently. [0003] Advanced oxidation technology is a kind of de...

Claims

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Application Information

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IPC IPC(8): C02F1/44C02F1/72C02F101/30
Inventor 张炜铭任逸尹越潘丙才花铭吕路
Owner NANJING UNIV
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