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A kind of 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

Active Publication Date: 2016-08-31
徐州洁诚环保科技有限公司
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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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PUM

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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 membrane casting liquid; preparing core liquid and external gel bath; injecting the core liquid and the membrane casting liquid together into a spinning nozzle by utilizing a dry-wet spinning device, and extruding together from the spinning nozzle so as to prepare a hollow fiber membrane filament; carrying out dry spinning on the hollow fiber membrane filament prepared in the previous step in a dry spinning path of 0-35cm, and carrying out gel phase conversion sequentially in first gel bath and second gel bath so as to form a macromolecule hollow fiber porous membrane with a micro duct. The composite hollow fiber membrane prepared by the invention is a hydrophilic hollow membrane material, has relatively high membrane flux at low pressure, is good in pollution resistance, and meanwhile has relatively good mechanical intensity because of complementarity of 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 Patents(China)
IPC IPC(8): B01D71/22B01D71/14B01D69/12B01D69/08B01D67/00
Inventor 不公告发明人
Owner 徐州洁诚环保科技有限公司
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