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A kind of montmorillonite modified polyvinyl chloride hollow fiber ultrafiltration membrane and preparation method thereof

A technology of polyvinyl chloride and montmorillonite, which is applied in the field of membrane separation and can solve problems such as poor anti-pollution performance

Active Publication Date: 2020-10-23
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problem of poor anti-pollution performance of polyvinyl chloride ultrafiltration membranes in the prior art, and provide a montmorillonite-modified polyvinyl chloride hollow fiber ultrafiltration membrane with strong hydrophilic performance and good anti-pollution performance

Method used

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  • A kind of montmorillonite modified polyvinyl chloride hollow fiber ultrafiltration membrane and preparation method thereof
  • A kind of montmorillonite modified polyvinyl chloride hollow fiber ultrafiltration membrane and preparation method thereof
  • A kind of montmorillonite modified polyvinyl chloride hollow fiber ultrafiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A montmorillonite-modified polyvinyl chloride hollow fiber ultrafiltration membrane is formulated with montmorillonite hydrophilic-modified polyvinyl chloride to form a casting solution, which is formed through defoaming, extrusion, and solidification; the casting solution includes The following components in mass percent:

[0041] PVC 15%

[0042] Montmorillonite 0.3%

[0043] Polyvinylpyrrolidone 3%

[0044] The balance is N,N-dimethylacetamide.

[0045] Wherein, the montmorillonite is modified, and the modification method includes the following steps:

[0046] 1) Mix montmorillonite and lauryl amidopropyl hydroxysultaine with a mass ratio of 0.7:1, heat to 60° C., and stir and react at a speed of 1600 rpm for 5 hours;

[0047] 2) Filter the reacted product, and then dry it at 65°C for 24 hours;

[0048] 3) adding the dried product into a ball mill, passing through a 180-mesh sieve after crushing to obtain a modified montmorillonite.

[0049] A preparation metho...

Embodiment 2

[0056] A montmorillonite-modified polyvinyl chloride hollow fiber ultrafiltration membrane is formulated with montmorillonite hydrophilic-modified polyvinyl chloride to form a casting solution, which is formed through defoaming, extrusion, and solidification; the casting solution includes The following components in mass percent:

[0057] PVC 18%

[0058] Montmorillonite 0.5%

[0059] Polyvinylpyrrolidone 4%

[0060] The balance is N,N-dimethylacetamide.

[0061] Wherein, the montmorillonite is modified, and the modification method includes the following steps:

[0062] 1) Mix montmorillonite and lauryl amidopropyl hydroxysultaine with a mass ratio of 0.8:1, heat to 63° C., and stir and react at a speed of 1700 rpm for 5.3 hours;

[0063] 2) Filter the reacted product, and then dry it at 68°C for 30 hours;

[0064] 3) adding the dried product into a ball mill, passing through a 190-mesh sieve after crushing to obtain a modified montmorillonite.

[0065] A preparation met...

Embodiment 3

[0072] A montmorillonite-modified polyvinyl chloride hollow fiber ultrafiltration membrane is formulated with montmorillonite hydrophilic-modified polyvinyl chloride to form a casting solution, which is formed through defoaming, extrusion, and solidification; the casting solution includes The following components in mass percent:

[0073] PVC 20%

[0074] Montmorillonite 0.8%

[0075] Polyvinylpyrrolidone 5%

[0076] The balance is N,N-dimethylacetamide.

[0077] Wherein, the montmorillonite is modified, and the modification method includes the following steps:

[0078] 1) Mix montmorillonite and lauryl amidopropyl sulfobetaine with a mass ratio of 0.85:1, heat to 65° C., and stir and react at a speed of 1800 rpm for 5.5 hours;

[0079] 2) Filter the reacted product, and then dry it at 70°C for 35 hours;

[0080] 3) adding the dried product into a ball mill, passing through a 200-mesh sieve after crushing to obtain a modified montmorillonite.

[0081] A preparation metho...

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Abstract

The invention relates to the technical field of membrane separation, and discloses a montmorillonite-modified polyvinyl chloride hollow fiber ultrafilter membrane and a preparation method thereof. The method comprises the following steps: montmorillonite is used for hydrophilic modification of polyvinyl chloride to prepare a casting solution, and steps of deaeration, extrusion and solidification are carried out to obtain the product. The casting solution comprises the following components by mass percentage: 15-25% of polyvinyl chloride, 0.3-2% of montmorillonite, 3-8% of polyvinylpyrrolidone, and the balance of a N,N-dimethyl acetamide solvent. The hollow fiber ultrafilter membrane has the advantages of good stability, high oil stain retention rate and large flux.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a polyvinyl chloride hollow fiber ultrafiltration membrane modified by montmorillonite and a preparation method thereof. Background technique [0002] As the first energy source, oil energy will produce a large amount of oily sewage in the process of production, refining and use. The method of treating oily sewage through membrane treatment technology is commonly used today, but the ensuing membrane pollution problem has given People cause a new round of troubles, and one of the main reasons why the development of membrane technology is hindered is membrane fouling. By improving the hydrophilicity of the membrane, the problem of membrane fouling can be greatly reduced, so people began to explore ways to modify the organic membrane with insufficient hydrophilicity. The hydrophilicity of the modified membrane is improved, so it can be used in oily sewage processing. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/30B01D69/08B01D69/02B01D67/00B01D61/14
CPCB01D61/145B01D67/0079B01D67/0093B01D69/02B01D69/08B01D71/30B01D2325/02B01D2325/24B01D2325/36
Inventor 王北福聂立宏朱根民赵东锋高良军殷丹丹
Owner ZHEJIANG OCEAN UNIV