Hollow fiber positively charged membrane and preparation method thereof

A positive charge and fiber technology, applied in the field of hollow fiber positive charge membrane and its preparation, can solve the problems of complex process, narrow scope of application, unsuitable for large-scale production, etc.

Active Publication Date: 2021-08-06
TIANJIN MOTIMO MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is complicated, the conditions are severe, and a large amount of waste liquid is generated, so it is not suitable for large-scale production
Moreover, each membrane material has a different activation method, and the method of converting the active site is also more diverse, which makes the scope of application of this method narrower, and it is necessary to develop different modification methods for each membrane material.

Method used

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  • Hollow fiber positively charged membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Under nitrogen protection, the active polymer (styrene maleic anhydride random copolymer) 0.3 g, PVDF22G, lithium chloride 3g, and solvent 100g were stirred at 60 ° C for 24 hours, and the cast film was allowed to stand for 24 hours. Liquid, then the cast film liquid and the core fluid are extruded from the hollow fiber spinneret to the coagulation bath to obtain a hollow fiber load containing a bare amino group; wherein the core liquid is RO water to add 10 g / l Trivadic four Amine, 30 ° C. The coagulation bath is RO water, 30 ° C; wherein the styrene maleic anhydride random copolymer is prepared by the following steps: with a nitrogen protection, styrene, maleic anhydride and anhydride duisine is sequentially added in dimethylacetamides. Nitrile, three substance molar ratios were stirred at 1: 1: 0.003, 60 ° C for 10 hours, resulting in the product.

Embodiment 2

[0020] Example 2: 30 ° C The core is RO water. The coagulation bath was 10 g / l Trivadic Tuqua RO water, 30 ° C. The rest is the same as in Example 1.

Embodiment 3

[0021] Example 3: The material is polysulfone, and the rest is the same as in Example 1.

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PUM

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Abstract

The invention belongs to the field of separation, and specifically relates to a hollow fiber positively charged membrane and a preparation method thereof, comprising the following steps: the following components in parts by mass: styrene maleic anhydride random copolymer, a main material, and a porogen and solvent; stirring at 60°C for 24 hours, standing for 24 hours to form a casting solution, and then extruding the casting solution and core solution from a hollow fiber spinneret into a coagulation bath for shaping to obtain a hollow fiber loaded positive containing exposed amino groups Electric membrane; the main material is polysulfone, polyethersulfone, polyvinylidene fluoride, and polyvinyl chloride; when synthesizing an internal pressure type hollow fiber positively charged membrane, the core The liquid contains polyamine substances; when synthesizing the external pressure type hollow fiber positively charged membrane, the coagulation bath contains polyamine substances. The hollow fiber membrane prepared by the method of the invention is obviously positively charged, and the pollution resistance (the ratio of cumulative water production to water production) is also obviously improved.

Description

Technical field [0001] The present invention belongs to the separation field, and more particularly to a hollow fiber positive film and a preparation method thereof. Background technique [0002] The method of conventional mixed positive electrometes need to first activate the hollow fiber membrane, such as strong base, heating, radiation, and the like. The active site is then converted to a positive electrical cell group by one or more chemical reactions. The process is complex, the conditions are severe, and a large amount of waste liquid is generated, and it is not suitable for large-scale production. And each membrane material activation method is different, and the method of transforming the active site is also more diverse, so that the method is narrow, and there is a need for a different modification method for each membrane material. Inventive content [0003] It is an object of the present invention to overcome the disadvantages in the prior art, providing a hollow fibe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/82B01D71/76B01D69/08B01D67/00
CPCB01D67/0011B01D69/08B01D71/76B01D71/82
Inventor 李梁梁胡晓宇孙文挺高旭
Owner TIANJIN MOTIMO MEMBRANE TECH
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