Method for modifying polysulfone ultrafiltration membrane by ultraviolet irradiation

A technology of polysulfone ultrafiltration membrane and ultraviolet light, which is applied in the modification of polysulfone ultrafiltration membrane and the field of polysulfone ultrafiltration membrane modified by ultraviolet light irradiation, can solve the problem of affecting the performance of PS membrane body, the decrease of membrane separation ability, Restricting the application of membranes and other issues, achieving good industrial application prospects, enhanced hydrophilicity, and suitable for continuous industrial production

Inactive Publication Date: 2012-10-17
CSR QINGDAO HUAXUAN WATER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, membrane fouling such as membrane pore size reduction or clogging caused by adsorption and deposition on the surface of the membrane or in the pores of the membrane results in a decrease in membrane separation capacity, which restricts the application of membranes in the field of ultrafiltration.
Therefore, people have carried out a lot of research on the surface modification of polysulfone membranes, such as blending, copolymerization and oxidation reactions, etc., but these methods all affect the bulk properties of PS membranes, or only temporarily change

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The method for modifying the polysulfone ultrafiltration membrane by ultraviolet light irradiation of the present embodiment comprises the following steps:

[0020] (1) Take a sample: Cut the polysulfone membrane into a 2cm-long sample, shake and clean it with methanol (Sinopharm Chemical Reagent Co., Ltd.), and dry it in a vacuum oven at 40°C for 24 hours;

[0021] (2) Photosensitizer solution treatment: Dissolve photosensitizer benzophenone (Sinopharm Chemical Reagent Co., Ltd.) in acetone (Sinopharm Chemical Reagent Co., Ltd.) so that the concentration of photosensitizer benzophenone is 4×10 -3 mol / L to make a photosensitizer solution; soak the polysulfone membrane in the photosensitizer solution for 2 hours; after taking it out, dry it naturally until the acetone is completely volatilized;

[0022] (3) Ethanol solution treatment: Prepare ethanol into a 450ml / L aqueous solution, and add 0.0005g of polymerization inhibitor ferrous sulfate (Sinopharm Chemical Reagent C...

example 2

[0029] The method for modifying the polysulfone ultrafiltration membrane by ultraviolet light irradiation of the present embodiment comprises the following steps:

[0030] (1) Take a sample: Cut the polysulfone membrane into a 2cm-long sample, shake and clean it with methanol (Sinopharm Chemical Reagent Co., Ltd.), and dry it in a vacuum oven at 40°C for 24 hours;

[0031] (2) Photosensitizer solution treatment: Dissolve photosensitizer benzophenone (Sinopharm Chemical Reagent Co., Ltd.) in acetone (Sinopharm Chemical Reagent Co., Ltd.) so that the concentration of photosensitizer benzophenone is 4×10 -3 mol / L, to make a photosensitizer solution; soak the polysulfone membrane in the photosensitizer solution for 2.5 hours; after taking it out, dry it naturally until the acetone is completely volatilized;

[0032] (3) Ethanol solution treatment: Prepare ethanol into a 450ml / L aqueous solution, and add 0.0005g of polymerization inhibitor ferrous sulfate (Sinopharm Chemical Reagen...

example 3

[0039] The method for modifying the polysulfone ultrafiltration membrane by ultraviolet light irradiation of the present embodiment comprises the following steps:

[0040] (1) Take a sample: Cut the polysulfone membrane into a 2cm-long sample, shake and clean it with methanol (Sinopharm Chemical Reagent Co., Ltd.), and dry it in a vacuum oven at 40°C for 24 hours;

[0041] (2) Photosensitizer solution treatment: Dissolve photosensitizer benzophenone (Sinopharm Chemical Reagent Co., Ltd.) in acetone (Sinopharm Chemical Reagent Co., Ltd.) so that the concentration of photosensitizer benzophenone is 4×10 -3 mol / L, to make a photosensitizer solution; soak the polysulfone membrane in the photosensitizer solution for 2.3 hours; after taking it out, dry it naturally until the acetone is completely volatilized;

[0042] (3) Ethanol solution treatment: Prepare ethanol into a 450ml / L aqueous solution, and add 0.0005g of polymerization inhibitor ferrous sulfate (Sinopharm Chemical Reagen...

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Abstract

A technical scheme adopted by the invention is a method for modifying a polysulfone ultrafiltration membrane by ultraviolet irradiation. The method includes the following steps of: (1) sample preparation; (2) photosensitizer solution treatment; (3) ethanol solution treatment; and (4) ultraviolet irradiation. Based on changes in membrane properties like flux and retention rate caused by different UV light irradiation time on the polysulfone ultrafiltration membrane, optimum conditions for ultraviolet irradiation modification on the polysulfone ultrafiltration membrane are obtained, so as to effectively improve the surface hydrophilicity of the polysulfone ultrafiltration membrane.

Description

technical field [0001] The invention relates to a method for modifying polysulfone ultrafiltration membranes, in particular to a method for modifying polysulfone ultrafiltration membranes by ultraviolet light irradiation, and belongs to the technical field of polymer materials. Background technique [0002] Polysulfone is a kind of film-forming high polymer with excellent performance. It is widely used in the preparation of ultrafiltration membranes for its good chemical stability, water resistance, heat resistance, good film-forming property and mechanical strength. Polysulfone membrane inherits the characteristics of polysulfone itself, not only has excellent permeability, but also has good mechanical strength, acid and alkali resistance, compression resistance, stable chemical properties, and wide range of PH application. It is more and more widely used in the fields of fluid purification, food or fermentation industry. However, membrane fouling such as membrane pore siz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08L81/06
Inventor 杨佃章邓发晓蔡树威张松
Owner CSR QINGDAO HUAXUAN WATER
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