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 ultrafiltr

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
Comparison scheme
Effect test

Example Embodiment

[0046] Example 1

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

[0048] (1) Preparation of granular materials

[0049] Prepare MIL-53(Fe) particles, wash them with water and alcohol several times in sequence, and heat them to activate in vacuum after drying.

[0050] (2) Preparation of blended film casting liquid

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

[0052] (3) Preparation of support layer

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

Example Embodiment

[0086] Example 2

[0087] In this embodiment, a preparation method for improving the catalytic oxidation selectivity of a multifunctional hybrid ultrafiltration membrane is provided to prepare chitosan / Fe 2 O 3 -Polyethersulfone membrane, the steps are as follows:

[0088] (1) Preparation of granular materials

[0089] Preparation of Fe 2 O 3 Granules, pickled, then washed with water to neutrality, baked at high temperature after drying.

[0090] (2) Preparation of blended film casting liquid

[0091] Dissolve 0.5g of polyethersulfone into 5mL of N,N-dimethylacetamide, mix thoroughly until the polymer is completely dissolved, and add 0.5g of Fe in step (1) 2 O 3 The particles are added to the solution, fully mixed evenly, 0.25g polyethylene glycol is added, and fully mixed until all are dissolved to obtain a blended film casting solution.

[0092] (3) Preparation of support layer

[0093] The blended film casting solution obtained in step (2) is scraped on the glass plate by automatic squ...

Example Embodiment

[0098] Example 3

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

[0100] (1) Preparation of granular materials

[0101] Prepare MIL-53(Cu) particles, wash them with water and alcohol for several times, dry them and heat them to activate in vacuum.

[0102] (2) Preparation of blended film casting liquid

[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 from step (1) to the solution , Mix well, add 0.25g polyvinylpyrrolidone, mix well until all is dissolved, and obtain a blended film casting solution.

[0104] (3) Preparation of support layer

[0105] The blended film casting solution obtained in step (2) is manually painted on the aluminum foil by a film scraper, and ...

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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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