Activated carbon hollow fiber polysulfone membrane and preparation method thereof

Abstract

The invention discloses an activated carbon hollow fiber polysulfone membrane and a preparation method thereof; the membrane is an asymmetrical three-layer structure which comprises an outer surface layer, a middle support layer and an inner surface layer from outside to inside; the three layers are evenly distributed with activated carbon particles with particle sizes being less than or equal to 10mu m, specific surface area being 1104m / g, void volume being 0.92cm / g; continuous phase of the membrane is transparent bisphenol A polysulfone which is obtained by polycondensation of bisphenol A and 4, 4-dichloro diphenylsulfone and provided with molecular weight ranging from 100000 to 116500. The preparation method has the following steps: mixing the polysulfone, the activated carbon particles and 1-methyl-2 pyrollidone according to the mass ratio of 1:4:5-1:5:5; heating to melt the mixture and then obtaining the activated carbon hollow fiber polysulfone membrane by adopting wet-type spinning process with wet spinning distance being 2m, spinning extrusion volume flow rate being 12-15mL / min and spinning solution temperature being 75-80 DEG C. The activated carbon particles are made of coconut shells, the average grain diameter is less than 10mu m, the specific surface area is 1104m / g, and the void volume is 0.92cm / g. The membrane treatment effect is fine, the treatment time is short and the adsorbability of the membrane is high.

Description

technical field [0001] The invention relates to a hollow fiber polysulfone membrane and a preparation method thereof, in particular to an activated carbon hollow fiber polysulfone membrane and a preparation method thereof. Background technique [0002] With the development of industry and agriculture, a large amount of domestic and industrial wastewater is discharged into natural water bodies, especially herbicides, insecticides, fungicides, heat exchange catalysts, insulators, and lubricants are widely used, resulting in a large amount of high The concentration of refractory organic matter will inevitably cause soil and water pollution, and the environment on which human beings depend is deteriorating day by day. On the other hand, the fresh water sources available on the earth are becoming more and more scarce, and more and more cities are included in the water-scarce areas, especially in China, which is a water-scarce country, and governments all over the world hope to pa...

AI Technical Summary

Problems solved by technology

However, these membranes take too long to complete the degradation process, and cannot be widely used when the concentration of refractory organic matter is greater than 200 mg / L.

This is because the diffusion flux of the membrane woven by using chloromethylated quaternary aminated polysulfone as raw material is reduced, which is conducive to the growth of microorganisms on the membrane and reduces the harm of wastewater to microorganisms, but the rate of wastewater passing through the membrane is lower. slow, resulting in prolonged treatment time, although the structure and raw materials of this membrane have been optimized, it still cannot solve the problem of high-pollution wastewater treatment in modern society

[0003] Generally, the membrane spun by the textile process has a symmetrical structure, the mass transfer rate does not change in the level, and the treatment effect is relatively stable, which is conducive to the application of the membrane in the advanced treatment of wastewater. It can no longer meet the requirements of modern complex water quality treatment standards

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