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Hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane and preparation method thereof

A technology of polyaryletherketone and phenolphthalein-based polyaryletherketone is applied in the field of hydrophilic polyaryletherketone blended hollow fiber ultrafiltration membrane and its preparation, and achieves improved hydrophilicity and anti-pollution ability, good heat resistance performance, the effect of weakening the swelling effect

Active Publication Date: 2013-05-01
TIANBANG NAT ENG RES CENT OF MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) Chemical modification can be achieved by methods such as copolymerization, grafting, plasma surface polymerization and interfacial polycondensation. However, it has been proved through practice that there are many chemical modification methods Limitations: Including that film formation and hydrophilic modification cannot be carried out simultaneously; reaction conditions are often harsh and costly; chemical reactions can easily affect the structure and strength of porous membranes, etc.
[0015] At present, there are few reports on the preparation of hydrophilic and pollution-resistant phenolphthalein-based polyaryletherketone hollow fiber ultrafiltration membranes by polymer blending

Method used

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  • Hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane and preparation method thereof
  • Hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane and preparation method thereof
  • Hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 100 grams of phenolphthalein-based polyaryl ether ketone (PEK-C), 22 grams of polyvinylpyrrolidone PVP (K85), add 420 grams of dimethyl sulfoxide and 12 grams of polyethylene glycol (600) to a mixed solvent of 80 Stir at ℃ for 24 hours to form a homogeneous blended polymer film casting solution. After that, the casting liquid was filtered through a stainless steel filter and placed in a material tank at a temperature of 50°C for vacuum degassing. After the bubbles are completely removed, the hollow fiber ultrafiltration membrane is prepared by the dry-wet phase conversion process. The casting liquid is extruded through the spinneret, after passing through a 2cm air gap, it is vertically immersed in a gel bath at 50℃ for phase separation and solidification, and then introduced into the winding tank through a winding wheel with a speed of 6m / min. The core liquid is composed of It is pure water, forming a nascent hollow fiber ultrafiltration membrane. The nascent hollow f...

Embodiment 2

[0071] 100g of phenolphthalein-based polyaryletherketone (PEK-C), 20g of polyvinylpyrrolidone PVP (K90), respectively add 392g of N-methylpyrrolidone and 15g of pure water into a mixed solvent, and stir at 80℃ for 36 hours , The formation of a homogeneous blended polymer film casting solution. After that, the casting liquid was filtered through a stainless steel filter and placed in a material tank at a temperature of 60°C for vacuum degassing. After the bubbles are completely removed, the hollow fiber ultrafiltration membrane is prepared by the dry-wet phase conversion process. The casting liquid is extruded through the spinneret, and after a 1cm air gap, it is vertically immersed in a 60℃ gel bath for phase separation and solidification, and then introduced into the winding tank through a winding wheel with a speed of 7m / min. The core liquid is composed of It is pure water, forming a nascent hollow fiber ultrafiltration membrane. The nascent hollow fiber membrane is immerse...

Embodiment 3

[0075] The hollow fiber ultrafiltration membrane was prepared according to the casting solution formula of Example 2. The spinning process conditions are: the air gap is 2cm, the spinning speed is 10m / min, the gel bath temperature is 60°C, and the core liquid composition is a mixed solution of N-methylpyrrolidone and water with a mass concentration of 80%. The nascent hollow fiber membrane is immersed in deionized water at 25°C for 48 hours for finalization, and washed with clean water. The cleaned membrane is immersed in a sodium persulfate solution with a concentration of 8%, and reacted at 85°C for 4 hours to carry out post-treatment for hydrophilicity retention to obtain a phenolphthalein-based polyaryletherketone blend hollow with stable hydrophilicity Fiber ultrafiltration membrane.

[0076] After measuring its separation performance, at a temperature of 25°C and a transmembrane pressure difference of 0.1 MPa, the membrane's pure water flux is 695L / m 2 .hr. The water cont...

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Abstract

The invention discloses a hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane and a preparation method thereof. The preparation method comprises that phenolphthalein polyaryl ether ketone and high-molecular weight polyvinylpyrrolidone are used as main membrane-preparation materials; a membrane casting liquid is prepared by a solution blending method; a hollow fiber ultrafilter membrane is prepared by a dry-wet phase inversion technology; and the hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane having lasting hydrophily is prepared by hydrophilic effect-persistence aftertreatment. The preparation method has simple processes, is convenient for operation, does not need special equipment and is conducive to industrial production and application. The hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane obtained by the preparation method has high temperature resistance, chemical solvent resistance, acid and basic corrosion resistance, and lasting, stable and excellent hydrophily. In oil-containing waste water treatment, the hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane has high membrane flux, obvious oil removal effects and strong oil pollution resistance and is suitable for high-efficiency treatment on oil-containing waste water.

Description

technical field [0001] The invention relates to the field of ultrafiltration membrane separation, in particular to a hydrophilic polyaryletherketone blended hollow fiber ultrafiltration membrane and a preparation method thereof. Background technique [0002] With the rapid development of the industrial economy, a large amount of oily wastewater will be produced in the production process of many industries such as petroleum processing, iron and steel smelting and machinery manufacturing. If it is discharged directly without treatment, it will cause serious harm to the natural environment and ecological balance. Traditional methods for treating oily wastewater include chemical demulsification, gravity separation, dissolved air flotation, etc., which not only require large investment, high energy consumption, lengthy process, but also easily cause secondary pollution, making it difficult to obtain ideal treatment effects. [0003] Aiming at the current worldwide problem of in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/52B01D69/08B01D67/00C02F1/44C02F1/40
Inventor 葛洁杨凤林尹中升徐俊峰张桂花
Owner TIANBANG NAT ENG RES CENT OF MEMBRANE TECH
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