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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 nanofiltration membrane and its preparation method and application. The composite nanofiltration membrane of the present invention has Excellent solvent resistance, high permeate flux and good separation performance

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
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Effect test

preparation example 1

[0058] Preparation of Chlorinated Polyvinyl Chloride:

[0059] According to the document "Research on Preparation of Chlorinated Polyvinyl Chloride by Aqueous Phase Suspension Method" [D]. Chen Guowen. Zhejiang: Zhejiang University, 2013, the prepared chlorinated polyvinyl chloride meets the requirements of HG / T 4346-2012 coating Standard for Chlorinated Polyvinyl Chloride Resins. The weight average molecular weight is 200000-500000.

Embodiment 1

[0061] (1) Mix chlorinated polyvinyl chloride with N,N-dimethylacetamide, wherein, based on the total weight of chlorinated polyvinyl chloride and N,N-dimethylacetamide, chlorinated polyvinyl chloride The content is 25% by weight, then stirred in a 90°C water bath for 4 hours, left to cool to 20°C, put it into a desiccator for degassing for 3 hours, and made a casting solution;

[0062] (2) Evenly apply (scrape) the cast film solution to the polypropylene non-woven fabric fixed on the glass plate with a stainless steel scraper, control the distance between the knife edge and the non-woven fabric to be 100 μm, and immediately put the scraped film in 25 In the gel bath of the deionized water of ℃, after 1 hour, take out from the gel bath, and take off from the glass plate, after the casting liquid is solidified, immerse in the hexamethylenediamine solution of 6% by weight, Then refrigerate to obtain the support layer, and the side of the non-woven fabric scraping the casting liq...

Embodiment 2

[0070] (1) Mix chlorinated polyvinyl chloride with N,N-dimethylacetamide, wherein, based on the total weight of chlorinated polyvinyl chloride and N,N-dimethylacetamide, chlorinated polyvinyl chloride The content is 15% by weight, then stirred in a 90°C water bath for 4 hours, left to cool to 20°C, put it into a desiccator for degassing for 3 hours, and made a casting solution;

[0071] (2) Evenly apply (scrape) the cast film solution to the polypropylene non-woven fabric fixed on the glass plate with a stainless steel scraper, control the distance between the knife edge and the non-woven fabric to be 100 μm, and immediately put the scraped film in 25 In the gel bath of the deionized water of ℃, after 1 hour, take out from the gel bath, and take off from the glass plate, after the casting liquid is solidified, immerse in the hexamethylenediamine solution of 6% by weight, Then refrigerate to obtain the support layer, and the side of the non-woven fabric scraping the casting liq...

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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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