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Montmorillonite modified polyvinyl chloride flat plate hyperfiltration membrane and preparation method thereof

A technology for polyvinyl chloride and polyvinyl chloride powder, applied in the field of membrane separation, can solve the problems of complex preparation process, poor anti-pollution performance, etc., and achieve the effects of improving the retention rate, strong anti-pollution performance, and simplifying the preparation steps

Active Publication Date: 2017-12-01
浙江金成环保科技工程有限公司
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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 problems of poor anti-pollution performance and complicated preparation process of polyvinyl chloride ultrafiltration membranes in the prior art, and provides a montmorillonite-modified polyvinyl chloride flat ultrafiltration membrane with good hydrophilic performance and simple preparation method

Method used

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  • Montmorillonite modified polyvinyl chloride flat plate hyperfiltration membrane and preparation method thereof
  • Montmorillonite modified polyvinyl chloride flat plate hyperfiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A montmorillonite-modified polyvinyl chloride flat ultrafiltration membrane is formulated with montmorillonite hydrophilic-modified polyvinyl chloride to form a casting solution, which is separated by defoaming, coating and solidification; the casting solution includes The following components in mass percent:

[0041] PVC 10%

[0042] Montmorillonite 0.3%

[0043] Molecular weight 400 polyethylene glycol 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 preparatio...

Embodiment 2

[0056] A montmorillonite-modified polyvinyl chloride flat ultrafiltration membrane is formulated with montmorillonite hydrophilic-modified polyvinyl chloride to form a casting solution, which is separated by defoaming, coating and solidification; the casting solution includes The following components in mass percent:

[0057] PVC 13%

[0058] Montmorillonite 0.5%

[0059] Molecular weight 400 polyethylene glycol 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 70°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 preparat...

Embodiment 3

[0072] A montmorillonite-modified polyvinyl chloride flat ultrafiltration membrane is formulated with montmorillonite hydrophilic-modified polyvinyl chloride to form a casting solution, which is separated by defoaming, coating and solidification; the casting solution includes The following components in mass percent:

[0073] PVC 15%

[0074] Montmorillonite 0.7%

[0075] Molecular weight 600 polyethylene glycol 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 75°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 preparatio...

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Abstract

The invention relates to the technical field of membrane separation, and discloses a montmorillonite modified polyvinyl chloride flat plate hyperfiltration membrane and a preparation method thereof. The modified montmorillonite hydrophilic modified polyvinyl chloride is used for preparing membrane forming liquid; the montmorillonite modified polyvinyl chloride flat plate hyperfiltration membrane is obtained through defoaming, coating and solidification separation. The membrane forming liquid is prepared from the following ingredients in percentage by mass: 10 to 20 percent of polyvinyl chloride, 0.3 to 2 percent of modified montmorillonite, 3 to 7 percent of polyethyleneglycol and the balance N,N-dimethyl acetamide solvents. The hyperfiltration membrane prepared by the method provided by the invention has high stability, and has high flux and retention rate on oil-containing sewage.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a montmorillonite-modified polyvinyl chloride flat ultrafiltration membrane 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. [0003] Pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/30B01D69/06B01D67/00C02F1/44
CPCB01D67/0079B01D69/06B01D71/30C02F1/444
Inventor 王北福聂立宏朱根民赵东锋高良军殷丹丹
Owner 浙江金成环保科技工程有限公司
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