Hollow fiber positively charged membrane and preparation method thereof

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...

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.

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