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Enhanced hollow fiber ultrafiltration membrane, and preparation method thereof

An enhanced, ultrafiltration membrane technology, applied in ultrafiltration, chemical instruments and methods, membranes, etc., can solve the problems of complex preparation process, and achieve the effect of simple preparation process, high peel strength, and improved peel strength

Inactive Publication Date: 2018-03-13
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent (201410690025.9) discloses a preparation method of glass fiber-reinforced PVDF hollow fiber composite membrane with improved interface bonding strength. The interface polymerization reaction between glass fiber and active membrane liquid occurs, and the organic membrane layer is chemically bonded to the inorganic support. Combined, the monomer polymer is evenly embedded in the glass fiber surface and PVDF membrane material, and exists stably in the hollow fiber membrane, so that the peel strength, hydrophilicity and water flux of the composite membrane are improved. The preparation process more complicated

Method used

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  • Enhanced hollow fiber ultrafiltration membrane, and preparation method thereof
  • Enhanced hollow fiber ultrafiltration membrane, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Pretreatment of polysulfone hollow fiber base membrane (with microporous structure and no dense skin layer):

[0040] Soak the polysulfone hollow fiber membrane with a microporous structure and no dense skin in absolute ethanol for 10 minutes to remove possible organic impurities on the surface of the fiber membrane, then take it out and place it in a clean environment for at least 24 hours to let it dry. Let dry naturally.

[0041] 2. Configure the film-making solution:

[0042] First, a small amount of perfluorosulfonic acid resin powder was added in batches to a solvent system with a mass ratio of ethanol and distilled water of 80:20, stirred to dissolve completely, and a solution with a mass concentration of 5% and a viscosity of 10 mPa·s was prepared. The solution is purified by pressure filtration through a porous filter membrane to remove impurities in the solution to obtain a membrane-forming solution.

[0043] 3. Preparation of ultrafiltration membrane

...

Embodiment 2

[0049] 1. Pretreatment of polytetrafluoroethylene hollow fiber base membrane (with microporous structure and no dense skin layer):

[0050] Soak the polytetrafluoroethylene hollow fiber membrane with a microporous structure and no dense skin in absolute ethanol for 10 minutes to remove possible organic impurities on the surface of the fiber membrane, then take it out and place it in a clean environment for at least 24 hours Let it air dry naturally.

[0051] 2. Configure the film-making solution:

[0052] First, a small amount of perfluorosulfonic acid resin powder was added in batches to a solvent system with a mass ratio of ethanol and distilled water of 90:10, stirred to dissolve completely, and a solution with a mass concentration of 10% and a viscosity of 120 mPa·s was prepared. The solution is purified by pressure filtration through a porous filter membrane to remove impurities in the solution to obtain a membrane-forming solution.

[0053] 3. Preparation of ultrafiltr...

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Abstract

The invention belongs to the field of functional high molecular material, and more specifically relates to an enhanced hollow fiber ultrafiltration membrane, and a preparation method thereof. According to the preparation method, a high molecular hollow fiber is taken as a base membrane, wherein the surface of the high molecular hollow fiber is of a micropore structure; the surface of the base membrane is coated with a hydrophilic material with selective functions; penetrating of the hydrophilic material into the micropores of the base membrane is realized, and at the same time, a defect-free compact skin layer structure is formed on the surface of the base membrane and is taken as an active separating layer; and the thickness of the active separating layer is controlled to be 0.3 to 1<mu>m. The invention also provides a preparation method. The preparation method is simple; operation is convenient; the enhanced hollow fiber ultrafiltration membrane is high in mechanical strength and peel strength, excellent in separation performance, and low in preparation cost; and industrialized production is convenient to realize.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a reinforced hollow fiber ultrafiltration membrane and a preparation method thereof. Background technique [0002] Membrane separation technology has the advantages of simple operation, low cost, no phase change, rapidity, energy saving and pollutant reduction, so it is widely used in water treatment, power industry, biomedical technology and food and other fields. During the use of membrane separation, the large-scale application in the field of water treatment is seriously affected due to the poor anti-fouling ability and mechanical strength of the membrane. [0003] In order to overcome the shortcomings of membrane separation technology, the anti-fouling performance of the membrane is mainly improved by adding hydrophilicity to the membrane modification, and the mechanical strength of the membrane is improved by coating the composite membrane structure w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/14B01D67/00B01D69/02B01D69/08B01D71/26B01D71/30B01D71/34B01D71/36B01D71/68
CPCB01D61/145B01D67/0088B01D69/02B01D69/08B01D71/26B01D71/30B01D71/34B01D71/36B01D71/68B01D2323/02
Inventor 唐军柯高启秀杨潇李永军杨玉清周鹏飞王丽
Owner SHANDONG DONGYUE POLYMER MATERIAL