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Method for modifying polysulfone ultra-filtration membrane

A technology of polysulfone ultrafiltration membrane and polysulfone membrane, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. It can solve the problems of affecting the performance of PS membrane body, the decrease of membrane separation ability, and the reduction of membrane pore size. , to achieve good industrial application prospects, enhanced hydrophilicity, and low equipment cost

Inactive Publication Date: 2015-01-28
QINGDAO JINGYIXIN ELECTRONICS TECH
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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 the modified polysulfone ultrafiltration membrane 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 Co., Ltd.) to the ethanol solution;...

example 2

[0030] The method for the modified polysulfone ultrafiltration membrane of the present embodiment comprises the following steps:

[0031] (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;

[0032] (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;

[0033] (3) Ethanol solution treatment: Prepare ethanol into a 450ml / L aqueous solution, and add 0.0005g of polymerization inhibitor ferrous sulfate (Sinopharm Chemical Reagent Co., Ltd.) to the ethanol soluti...

example 3

[0042] The method for the modified polysulfone ultrafiltration membrane of the present embodiment comprises the following steps:

[0043] (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;

[0044] (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;

[0045] (3) Ethanol solution treatment: Prepare ethanol into a 450ml / L aqueous solution, and add 0.0005g of polymerization inhibitor ferrous sulfate (Sinopharm Chemical Reagent Co., Ltd.) to the ethanol soluti...

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Abstract

The invention provides a method for modifying a polysulfone ultra-filtration membrane. The method comprises the following steps: (1) sample selection, (2) photo-sensitizer solution treatment, (3) ethanol solution treatment, and (4) ultraviolet irradiation. According to the method for modifying the polysulfone ultra-filtration membrane, optimal conditions of modifying the polysulfone ultra-filtration membrane are obtained based on variation of properties such as the flux and retention rate of the polysulfone ultra-filtration membrane which is subjected to ultraviolet irradiation for different time, so that the hydrophilic property of the surface of the polysulfone ultra-filtration membrane is effectively improved.

Description

[0001] technical field [0002] The invention relates to a method for modifying polysulfone ultrafiltration membranes, in particular to a method for modifying polysulfone ultrafiltration membranes, and belongs to the technical field of polymer materials. [0003] Background technique [0004] 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 size reduction or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D71/68B01D67/00B01D69/02
Inventor 王鹏
Owner QINGDAO JINGYIXIN ELECTRONICS TECH