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Preparation method of chitosan-polysulfone hollow fiber membrane

A chitosan and fiber membrane technology, which is applied in the field of preparation of chitosan-polysulfone hollow fiber membranes, can solve the problems of poor mechanical properties, poor water resistance, high brittleness, etc., and achieves low membrane production cost and enhanced usability. , the effect of low price

Inactive Publication Date: 2013-11-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure chitosan membranes have major problems in practical applications, such as poor mechanical properties, high brittleness, poor water resistance, easy degradation, and not suitable for use in acidic environments.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of chitosan coating solution: Dissolve chitosan and N-(2-hydroxyethyl)piperazine with a molecular weight of 100,000 and a deacetylation degree of 85% in 2wt.% oxalic acid aqueous solution, and chitosan The mass ratio of sugar to N-(2-hydroxyethyl)piperazine is 20:1~5:1, and the solution is made into a solution with a mass fraction of 0.1%~2%, stirred at room temperature until uniform, and then transferred to an autoclave , purged the air with nitrogen, heated to a temperature in the range of 160° C., kept the temperature for 3 hours, cooled down to room temperature, and stirred at a low speed for 2 hours in a vacuum state.

[0025] (2) Preparation of cross-linking agent: Dissolve 50 g of cross-linking agent in 1 L of 80% methanol or acetone or ether aqueous solution; the cross-linking agent is trimesoyl chloride.

[0026] (3) Treatment of polysulfone-based membranes: Polysulfone hollow fiber-based membranes were treated with 1.0 wt.% to 5.0 wt.% sodium d...

Embodiment 2

[0030] (1) Preparation of chitosan coating solution: Dissolve chitosan and N-(2-hydroxyethyl)piperazine with a molecular weight of 100,000 and a deacetylation degree of 85% in 2wt.% oxalic acid aqueous solution, and chitosan The mass ratio of sugar to N-(2-hydroxyethyl)piperazine is 20:1~5:1, and the solution is made into a solution with a mass fraction of 0.1%~2%, stirred at room temperature until uniform, and then transferred to an autoclave , purged the air with nitrogen, heated to a temperature in the range of 150°C, kept the temperature for 4 hours, cooled down to room temperature, and stirred at a low speed for 2 hours in a vacuum state.

[0031] (2) Preparation of cross-linking agent: Dissolve 10 g of cross-linking agent in 1 L of 80% methanol or acetone or ether aqueous solution; the cross-linking agent is ethylene glycol diglycidyl ether.

[0032] (3) Treatment of polysulfone-based membranes: Polysulfone hollow fiber-based membranes were treated with 1.0 wt.% to 5.0 w...

Embodiment 3

[0036] (1) Preparation of chitosan coating solution: Dissolve chitosan and N-(2-hydroxyethyl)piperazine with a molecular weight of 100,000 and a deacetylation degree of 85% in 2wt.% oxalic acid aqueous solution, and chitosan The mass ratio of sugar to N-(2-hydroxyethyl)piperazine is 20:1~5:1, and the solution is made into a solution with a mass fraction of 0.1%~2%, stirred at room temperature until uniform, and then transferred to an autoclave , purged the air with nitrogen, heated to a temperature in the range of 140° C., kept the temperature for 6 hours, cooled down to room temperature, and stirred at a low speed for 2 hours in a vacuum state.

[0037] (2) Preparation of cross-linking agent: Dissolve 30 g of cross-linking agent in 1 L of 80% methanol or acetone or ether aqueous solution; the cross-linking agent is ethylene glycol diglycidyl ether.

[0038] (3) Treatment of polysulfone-based membranes: Polysulfone hollow fiber-based membranes were treated with 1.0 wt.% to 5.0...

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PUM

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Abstract

The invention discloses a preparation method of a chitosan-polysulfone hollow fiber membrane. The method is characterized by comprising the following steps: firstly, preparing chitosan coating liquid and a cross-linking agent solution; soaking a polysulfone hollow fiber membrane by sodium dodecyl benzene sulfonate water solution, polyethylene glycol ether water solution or octyl phenol polyoxyethylene ether water solution, washing the soaked fiber membrane by distilled water, and airing the fiber membrane at room temperature for standby application; after that, soaking the polysulfone hollow fiber membrane into the chitosan coating liquid, vacuumizing a membrane filament inner tube, then pulling a membrane filament out of the chitosan solution, and drying the membrane filament; finally, soaking the membrane filament coated with the chitosan into the cross-linking agent solution, carrying out reaction for a period of time, then taking out the membrane filament and drying under the nitrogen atmosphere to obtain the chitosan-polysulfone hollow fiber membrane. The preparation process of the composite membrane is simple and high in controllability. The method is rich in material source, low in price, low in cost of membrane preparation, non-toxic in the membrane preparation process and environment-friendly.

Description

technical field [0001] The invention relates to a preparation method and application of a chitosan (CS) / polysulfone (PSf) composite hollow fiber membrane, belonging to the field of gas separation. Background technique [0002] As an important biomass conversion energy, biogas has great significance in its development and utilization. At present, my country's biogas is mainly used as domestic fuel and power generation, and there is no deep purification, only preliminary desulfurization and dehydration, and no carbon dioxide removal. However, the presence of carbon dioxide in biogas will reduce the calorific value, corrode pipes, and also cause greenhouse gas emissions, so effectively separate CO from biogas 2 It is of great significance to the utilization of biogas. Currently, the separation of CO 2 The main methods of gas are absorption method, adsorption method, cryogenic separation method and membrane separation method. Compared with the traditional process, the membra...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D69/12B01D67/00
Inventor 陈泽智龚惠娟樊杨梅马莎莎虞辉余珉王梦秋
Owner NANJING UNIV
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