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Preparation method of composite hollow fiber membrane

A fiber membrane and hollow technology, which is applied in the field of polymer material preparation, can solve the problems of poor pollution resistance, low flux, and low mechanical strength, and achieve the effects of pollution-resistant cleaning, large flux, and good mechanical properties

Inactive Publication Date: 2015-06-03
WATER CODE MEMBRANE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention designs a preparation method of a composite hollow fiber membrane, which solves the problems of low mechanical strength, poor pollution resistance and low flux of the current hollow fiber membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of composite hollow fiber membrane comprises the following steps:

[0029] Step 1: Prepare the casting solution by stirring and blending 13% of the polymer material, 75% of the solvent, 2% of the additive and 10% of the chemical reaction porogen at a temperature of 60°C for 12 hours, and standing at a constant temperature of 60°C to remove Soak for 25 hours to obtain a homogeneous casting solution; the polymer material is a mixture of cyanoethyl cellulose, cellulose xanthate and polyethersulfone in a mass ratio of 20:20:6, and the solvent is N-methylpyrrolidone and sulfolane in a mass ratio of 3:1, the additive is a mixture of lauryl amidopropyl amine oxide, polymethyl methacrylate, and zinc chloride in a mass ratio of 1:5:3, and the chemical reaction causes The pore agent is a mixture of methylcellulose, titanium dioxide, and aluminum oxide at a mass ratio of 5:2:2.

[0030] Step 2: prepare the core liquid and the outer gel bath; the composition...

Embodiment 2

[0034] The preparation method of composite hollow fiber membrane comprises the following steps:

[0035] Step 1: Prepare the casting solution by stirring and blending 27% of the polymer material, 60% of the solvent, 5% of the additive and 8% of the chemical reaction porogen at a temperature of 60°C for 18 hours, and standing at a constant temperature of 70°C to remove Soak for 36 hours to obtain a homogeneous casting solution; the polymer material is a mixture of cyanoethyl cellulose, cellulose xanthate and polyethersulfone in a mass ratio of 20:20:15, and the solvent is N-methylpyrrolidone and sulfolane in a mass ratio of 3:1, the additive is a mixture of lauryl amidopropyl amine oxide, polymethyl methacrylate, and zinc chloride in a mass ratio of 1:5:3, and the chemical reaction causes The pore agent is a mixture of methylcellulose, titanium dioxide, and aluminum oxide at a mass ratio of 5:2:2.

[0036] Step 2: preparing core liquid and outer gel bath; the composition of th...

Embodiment 3

[0040] The preparation method of composite hollow fiber membrane comprises the following steps:

[0041] Step 1: Prepare the casting solution by stirring and blending 18% of the polymer material, 68% of the solvent, 7% of the additive and 7% of the chemical reaction porogen at a temperature of 65°C for 16 hours, and standing at a constant temperature of 65°C to remove Soak for 28 hours to obtain a homogeneous casting solution; the polymer material is a mixture of cyanoethyl cellulose, cellulose xanthate and polyethersulfone in a mass ratio of 20:20:10, and the solvent is N-methylpyrrolidone and sulfolane in a mass ratio of 3:1, the additive is a mixture of lauryl amidopropyl amine oxide, polymethyl methacrylate, and zinc chloride in a mass ratio of 1:5:3, and the chemical reaction causes The pore agent is a mixture of methylcellulose, titanium dioxide, and aluminum oxide at a mass ratio of 5:2:2.

[0042] Step 2: preparing core liquid and outer gel bath; the composition of the ...

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Abstract

The invention relates to a preparation method of a composite hollow fiber membrane. The preparation method is characterized by comprising the following steps: preparing a casting membrane solution; preparing a core solution and an external gel bath; spinning hollow fibers: injecting the core solution and the casting membrane solution into spinning nozzles together by utilizing dry-wet spinning equipment and extruding the core solution and the casting membrane solution from the spinning nozzles together to prepare hollow fiber membrane silk; and after the hollow fiber membrane silk obtained in the above step passes through a 0-35cm dry spinning path, enabling the hollow fiber membrane silk to enter a first gel bath and a second gel bath to undergo gel phase conversion, thus forming the polymer hollow fiber porous membrane with microchannels. The composite hollow fiber membrane prepared by the method is a hydrophilic hollow membrane material, has higher membrane flux under low pressure, has good pollution resistance and also has better mechanical strength due to the complementarity of the raw materials.

Description

technical field [0001] The application date of the present invention is September 17, 2013, the application number is: 201310423328.X, and the divisional application of the invention patent application titled "a method for preparing a composite hollow fiber membrane". The invention belongs to the field of polymer material preparation, and in particular relates to a preparation method of a high-strength, high-flux composite hollow fiber membrane. Background technique [0002] Hollow fiber membranes are mainly used for filtration or dialysis in various fields. The composite membrane design can be used to study and select the separation composite layer membrane material and base membrane material, and it is easy to obtain a separation membrane with high separation function and high permeation flux. Therefore, composite membrane technology has become one of the high-function separation membrane preparation technologies. important direction of development. [0003] An important...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/08B01D67/00B01D71/12B01D71/14
Inventor 不公告发明人
Owner WATER CODE MEMBRANE TECH CO LTD
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