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Method for modifying polymeric membrane material through electron beam irradiation

An electron beam irradiation, polymer membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high cost, complex surface technology of covalently modified membrane materials, and difficulty in mass production. , to achieve the effect of restoring water flux, good storage and transportation and convenience of use, and durable anti-fouling performance

Pending Publication Date: 2021-05-28
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of complex process, high cost and difficulty in mass production of the existing membrane material chemical modification method to covalently modify the surface of the membrane material, and to provide a method of modification and modification using electron beam irradiation technology. Polymer Membrane Materials Methods

Method used

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  • Method for modifying polymeric membrane material through electron beam irradiation
  • Method for modifying polymeric membrane material through electron beam irradiation
  • Method for modifying polymeric membrane material through electron beam irradiation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Under mechanical stirring, 20 g of polyvinylpyrrolidone (PVP) powder was added into 80 g of deionized water, and heated to 60° C., and stirring was continued for 6 hours to obtain a 20% PVP aqueous solution.

[0051] (2) get 1g step (1) gained PVP aqueous solution and 5g deionized water, 4g ethanol and mix in beaker, obtain the PVP aqueous solution that concentration is 2%; Get 5 commercially available polyethersulfone flat membrane materials (PES, diameter About 5cm, pore size 0.45μm, about 0.1g / sheet) soaked in the above-mentioned concentration of 2% PVA aqueous solution for 1 hour.

[0052] (3) the PES film material soaked in the PVP aqueous solution in the step (2) is taken out, and packed in a polyethylene ziplock bag; after sealing, send it into the electron accelerator irradiation room and carry out electron beam radiation treatment, and the absorbed dose is 150kGy, The dose rate is 2000kGy / hour; after the irradiation, unpack and rinse the irradiated PES memb...

Embodiment 2

[0055] (1) Under mechanical stirring, 20 g of polyvinylpyrrolidone (PVP) powder was added into 80 g of deionized water, and heated to 60° C., and stirring was continued for 6 hours to obtain a 20% PVP aqueous solution.

[0056] (2) get 2.5g step (1) gained PVP aqueous solution and 5g deionized water, 2.5g acetic acid and mix in beaker, obtain the PVP aqueous solution that concentration is 5%; Get 5 commercially available polyethersulfone flat membrane materials (PVDF , about 5 cm in diameter, 0.45 μm in pore size, about 0.1 g / piece) soaked in the above-mentioned 2% PVP aqueous solution for 1 hour.

[0057] (3) the PVDF film material soaked in the PVP aqueous solution in the step (2) is taken out, and packed in the polyethylene ziplock bag; After sealing, send into the electron accelerator irradiation room and carry out electron beam radiation treatment, the absorbed dose is 200kGy, The dose rate is 2500kGy / hour; after the irradiation is completed, unpack and rinse the irradiat...

Embodiment 3

[0060] (1) Under mechanical stirring, 20g of polyvinylimine (PEI) was added to 80g of deionized water, and heated to 60°C, and the stirring was continued for 6 hours to obtain a PEI aqueous solution with a concentration of 20%;

[0061] (2) Get 3g step (1) gained PEI aqueous solution and 5g deionized water, 2g acetone, stir and mix in beaker, obtain the PEI aqueous solution that concentration is 6%; Get 10 commercially available PVDF flat membrane materials (diameter 5cm, aperture 0.45 μm, about 0.1 g / piece) soaked in the above diluted PEI aqueous solution for 6 hours.

[0062] (3) the PVDF film material soaked in the PEI aqueous solution in the step (2) is taken out, and is packed in the polyethylene vacuum packaging bag; After vacuum sealing, send into the electron accelerator irradiation room and carry out the electron beam radiation treatment, the absorbed dose is 500kGy, the dose rate is 5000kGy / hour; after the irradiation is completed, unpack and rinse the irradiated PVD...

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Abstract

The invention relates to a method for modifying a polymeric membrane material by electron beam irradiation, which specifically comprises the following steps: fully soaking a polymeric membrane in an aqueous solution of a modifier and an auxiliary agent, then taking out the membrane material, and under a certain atmosphere, carrying out irradiation treatment by utilizing high-energy electron beam rays to induce a covalent cross-linking reaction between the modifier and the membrane material, and finally, fully washing with hot water to obtain the product. According to the method, the raw materials do not need to be modified in advance before reaction, oxygen removal is not needed, operation is easy, batch treatment can be achieved, the solvent is water, the process is green and safe, the surface hydrophilicity of the polymeric membrane material modified through the method is greatly improved, the organic matter pollution tolerance performance is remarkably improved, and the modified membrane material can be dried for storage, and the water flux can be recovered without soaking regeneration of organic solvents such as ethanol during use, so that the transportation and use procedures of the membrane product are simplified, and the practical value is excellent.

Description

technical field [0001] The invention relates to the technical field of polymer membrane materials, in particular to a method for modifying polymer membrane materials by electron beam irradiation. Background technique [0002] Membrane separation is a new and efficient separation technology for the separation, purification, enrichment or separation of gas components or liquid components with the help of chemical potential or external energy. Compared with traditional separation operations, it has the advantages of low energy consumption, high separation efficiency, good selectivity, mild conditions, wide applicability, no secondary pollution, compact structure, small footprint, simple process (easy to scale up and control), and Continuous operation, convenient operation, flexible adjustment and many other advantages. At present, it has been widely used in sewage treatment, metallurgy, chemical industry, electronics and other fields (Environ. Sci.: Water Res. Technol., 2016, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D71/44B01D71/34B01D69/08B01D67/00
CPCB01D71/44B01D71/68B01D71/34B01D69/08B01D67/0002
Inventor 张伯武谷雨李景烨
Owner SHANGHAI NORMAL UNIVERSITY
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