Composite nanofiltration membrane as well as preparation method and application thereof

A composite nanofiltration membrane and base membrane technology, applied in the field of composite membranes, can solve problems such as low permeation flux and poor solvent resistance, and achieve high permeation flux, high separation performance, and simple preparation process

Pending Publication Date: 2022-01-25
CHUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems of poor solvent resistance, low permeation flux and separation performance that exist in existing composite nanofiltration membranes, and provides a composite nan

Method used

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  • Composite nanofiltration membrane as well as preparation method and application thereof
  • Composite nanofiltration membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Preparation 1]

[0058] Preparation of chlorinated polyvinyl chloride:

[0059] According to the literature "research on polyvinyl chloride process" [D]. Chen Guowen. Zhejiang: Zhejiang University, 2013, prepared, prepared chlorinated polyvinyl chloride to meet Hg / T 4346-2012 coating Chlorinated polyvinyl chloride resin standard. The weight average molecular weight is 200,000-500,000.

Example Embodiment

[0060] [Example 1]

[0061] (1) Mixed chloride from N, N-dimethylacetamide, wherein chlorinated polyvinyl chloride is based on chlorinated polyvinyl chloride and N, N-dimethylacetamide. The content of 25% by weight, then stirred in a 90 ° C water bath for 4 hours, and then allowed to cool to 20 ° C, put it in a dryer for 3 hours, and formed a cast film solution;

[0062] (2) Uniformly coate (scraping) to the polypropylene nonwoven fabric fixed to the glass plate, and the spacing of the nonwoven fabric is 100 μm, and the film is immediately placed in 25 μm. In the gel bath of the deionized water of ° C, it was removed from the gel bath after 1 hour, and the cast film solution was subjected to a 6% by weight of the hexanediamine solution, soaking from the glass sheet. Then refrigerate, obtain the support layer, and the side of the non-woven scratch-cast film is also referred to;

[0063] (3) Secure the A surface of the support layer in the flat plate and frame of the polytetrafluoro...

Example Embodiment

[0069] [Example 2]

[0070] (1) Mixed chloride from N, N-dimethylacetamide, wherein chlorinated polyvinyl chloride is based on chlorinated polyvinyl chloride and N, N-dimethylacetamide. The content was 15% by weight, then stirred in a 90 ° C water bath for 4 hours, and after standing to 20 ° C, it was placed in a dryer for 3 hours to prepare a cast film liquid;

[0071] (2) Uniformly coate (scraping) to the polypropylene nonwoven fabric fixed to the glass plate, and the spacing of the nonwoven fabric is 100 μm, and the film is immediately placed in 25 μm. In the gel bath of the deionized water of ° C, it was removed from the gel bath after 1 hour, and the cast film solution was subjected to a 6% by weight of the hexanediamine solution, soaking from the glass sheet. Then refrigerate, obtain the support layer, and the side of the non-woven scratch-cast film is also referred to;

[0072] (3) Secure the A surface of the support layer in the flat plate and frame of the polytetrafluoroe...

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Abstract

The invention discloses a composite nanofiltration membrane as well as a preparation method and application thereof. The composite nanofiltration membrane comprises a supporting layer and a polyarylester layer, and the raw material of the supporting layer comprises a hydrophobic material. The composite nanofiltration membrane disclosed by the invention has excellent solvent resistance, relatively high permeation flux and relatively good separation performance.

Description

technical field [0001] The invention relates to the technical field of composite membranes, in particular to a composite nanofiltration membrane and its preparation method and application. Background technique [0002] At present, the solvent-resistant nanofiltration membranes that have been put into production abroad include MPF series and STARMEMTM series, but due to the high price, they are only suitable for the separation of organic solvents with relatively weak polarity. At present, there is no commercial solvent-resistant nanofiltration membrane in China, and most of them are still in the laboratory stage. Today's solvent-resistant nanofiltration membranes are faced with the problems of poor solvent resistance, high price, low flux and easy pollution. To solve the above problems, it is necessary to increase the research and development of suitable materials. Contents of the invention [0003] The present invention aims at the problems of poor solvent resistance, low...

Claims

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Application Information

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IPC IPC(8): B01D71/48B01D69/12B01D69/10B01D61/02B01D67/00B01D61/08
CPCB01D71/48B01D69/125B01D69/105B01D67/0011B01D67/0002B01D61/08B01D61/027
Inventor 周阿洋郑建东陈祺蒋玉巧王颖李文鹏
Owner CHUZHOU UNIV
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