High-flux composite reverse osmosis membrane containing ZSM-5 zeolite and preparation method of high-flux composite reverse osmosis membrane

Abstract

The invention discloses a high-flux composite reverse osmosis membrane containing ZSM-5 zeolite and a preparation method of the high-flux composite reverse osmosis membrane. The preparation method comprises the following specific steps: forming a polyamide functional layer by virtue of a support layer (generally an ultrafiltration membrane) through the interaction of polyamine water and multi-element acyl chloride, and doping the polyamide functional layer with ZSM-5 zeolite with hydrophobic pore ducts, so as to prepare the reverse osmosis membrane with a high-flux composite functional layer.The preparation method has the advantages that the ZSM-5 zeolite is doped into a polyamine separation layer through being dispersed into an organism phase, so that the problems that the ordered arrangement of most nano-particles is easily disrupted in a water phase during interfacial polymerization, and the nano-particles are not uniformly distributed are solved; the ZSM-5 zeolite can be well dispersed in common organic reagents such as normal hexane, so that the problem that most nano-particles cannot be dispersed in an organic solvent is solved; and the ZSM-5 zeolite is provided with hydrophobic pore ducts, water molecules can pass through without resistance, and the polyamine separation layer is doped with the ZSM-5 zeolite so as to provide water channels for the reverse osmosis membrane, so that the water flux can be substantially increased.

Description

technical field [0001] The invention belongs to the field of separation membrane material manufacturing, in particular to a high-flux composite reverse osmosis membrane containing ZSM-5 zeolite and a preparation method thereof. Background technique [0002] Reverse osmosis technology is a high-end water treatment technology that uses pressure to separate solutes and solvents. The average pore size is less than 1nm, which can effectively remove ions and small molecular organic substances in water. Compared with other separation technologies, it has no phase change and selectivity in the separation process. With the advantages of high efficiency and energy saving, it is widely used in many fields such as drinking water purification, boiler feed water, medicine, food, brackish water desalination and industrial wastewater treatment. [0003] Most reverse osmosis commercial membranes are organic polymer composite membranes, that is, an ultra-thin and dense separation layer, such ...

AI Technical Summary

Problems solved by technology

These two methods are based on the introduction of seed crystals on the porous carrier and react with the synthesis solution at high temperature. The operation is complicated, the equipment cost is high, and it is not conducive to large-scale production.

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